feat(pipeline): render queue, worker service and automated preview generation

One "Queue Export" click now renders the EXR sequence, then rebuilds the shot
headlessly with the studio slate/overlay template to produce the delivery MOV
and review MP4. Implements RenderPipeline2 phases 1-2 plus the preview stage.

Server:
- New models Export, RenderJob, ExportEvent, Machine, WorkerHeartbeat, plus
  Project.deliveryConfig and per-submission slate fields (Export.vfxScope,
  Export.submissionNote, inherited from the shot's previous export).
  Both migrations are purely additive; no existing column is touched.
- lib/render-pipeline: server-enforced state machine, transactional version
  increment with supersede, atomic FOR UPDATE SKIP LOCKED claim gated by
  machine availability windows, and a lease reaper run from instrumentation.ts.
- /api/ext/* endpoints for the panel and workers; session-auth mirrors under
  /api/render and /api/machines for the web UI.
- Pipeline pages: render queue, export detail, machine monitoring, plus an
  Exports tab on shot detail.

RenderWorker (.NET 8 Windows service, new):
- Registration, heartbeat as cancel channel, claim loop, aerender runner with
  progress parsing and stall watchdog, crash recovery and disk-spooled
  reporting that survives server downtime.
- Preview stage: headless AE assembles the preview comp into a throwaway AEP
  with both output modules queued, then a single aerender pass renders them.
  Preview jobs are not claimed while an interactive AE session is open, so an
  artist's project is never taken over.

AE panel: Queue Export with live status polling, urgent flag, retry, and the
VFX Scope / Submission Note fields. Every existing panel action is unchanged.

Preview chaining ships disabled behind SystemConfig preview.enabled.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

RenderWorker/.gitignore

@@ -0,0 +1,4 @@
+bin/
+obj/
+publish/
+*.user

RenderWorker/README.md

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+# VFXReview RenderWorker
+
+Windows service that drives `aerender.exe` on the artist workstations (RenderPipeline2 §7).
+It talks **only HTTP** to the VFXReview server (`/api/ext/*`, API-key auth) — it never
+gets a database connection. All scheduling policy (render windows, Render Now,
+urgent priority) is enforced server-side in the claim endpoint; the worker polls dumbly.
+
+## One click → EXR + MOV + MP4
+
+A single **Queue Export** click produces all three deliverables. The server
+chains two jobs:
+
+1. **AE_RENDER** — `aerender` writes the clean EXR sequence (no overlay, no LUT).
+2. **PREVIEW_ONLY** — created automatically when the render completes. The
+   worker runs `AfterFX.com -noui -r scripts/vfxr_build_preview.jsx`, which opens
+   the studio slate/overlay **template** AEP, imports the rendered EXRs, rebuilds
+   the shot around them (OCIO → `_SHOW LUT` → `UNG_VFX_OVERLAY`), duplicates
+   `UNG_EXPORT_TEMPLATE` into a preview comp with the slate filled in, queues the
+   MOV (`4444 Tri`) and MP4 (`REVIEW_PREVIEW`) output modules, and **saves a
+   throwaway AEP**. The worker then runs `aerender -project <that aep>` with no
+   `-comp`, rendering both outputs in one launch.
+
+The MOV and MP4 land beside the EXRs. The MP4 is uploaded and registered as an
+ordinary `Version` — internal-only, never client-visible, and it changes no task
+or shot status (§10.0). Preview settings live in `SystemConfig` under
+`preview.*`, so template names and paths are changed without redeploying.
+
+If the preview stage fails, only it is retried — the validated EXRs are never
+re-rendered. The temp AEP is kept on failure so you can open it and see exactly
+what the farm built.
+
+### Proving headless AE first
+
+Headless AE is the one real unknown, so prove it before relying on it
+(spec 18.2-C4). **Close After Effects**, then:
+
+```powershell
+.\scripts\test-preview-build.ps1 -ExrDir "V:\_EXPORTS\...\v002" -ShotCode "UNG_111_001_030" -Version "v002"
+```
+
+It runs the exact build the worker runs and prints the result plus any warnings
+(missing LUT comp, missing slate layer, …), then gives you the `aerender` command
+to render what it built. If it reports no result file, AE cannot script headlessly
+under that account — fall back to having the panel pre-build the preview comp in
+the artist's AEP (then it is pure `aerender`), or the ffmpeg engine.
+
+## What it does (Phase 2 scope)
+
+- Registers on startup (E6) and receives server-supplied tuning (poll/heartbeat/lease/stall).
+- Heartbeats every 30 s (E7) — the heartbeat response is also the cancel channel.
+- Claims one `AE_RENDER` job at a time (E8), runs `aerender.exe` with the manifest's
+  comp/frame-range/templates, parses `PROGRESS:` lines, reports progress + ETA (E9,
+  renews the lease).
+- Stall watchdog: no progress for `stallTimeoutSeconds` (default 600) → kill process tree, retryable fail.
+- Deterministic errors (missing footage / missing comp / unopenable project) → non-retryable fail (E10);
+  transient errors auto-requeue server-side up to `maxAttempts`.
+- On success: uploads the full aerender log via presign (E20), reports complete (E11).
+- Crash recovery: `current-job.json` written on claim; on restart the worker asks the server
+  what became of the job and reports a retryable fail if it was still ours. Partial renders
+  are never resumed — the next attempt clears its own output files and re-renders.
+- Durable reporting: complete/fail reports spool to disk and replay in order with backoff —
+  rendering continues while the server is down.
+
+Preview generation (Phase 4) and validation (Phase 3) plug into this same service later.
+
+## Build
+
+Requires the .NET 8+ SDK.
+
+```bash
+cd RenderWorker/VFXReviewWorker
+dotnet publish -c Release -r win-x64 --self-contained -p:PublishSingleFile=true -o publish
+```
+
+Produces a single `publish/VFXReviewWorker.exe` — no runtime install needed on render nodes.
+
+## Configure
+
+Create `C:\ProgramData\VFXReviewWorker\config.json` (§7.8):
+
+```json
+{
+  "serverUrl": "https://review.twotalesvfx.com",
+  "apiKey": "<API_SECRET_KEY>",
+  "machineName": "RENDER-01",
+  "aerenderPath": "C:\\Program Files\\Adobe\\Adobe After Effects 2026\\Support Files\\aerender.exe",
+  "aeVersion": "24.3",
+  "ffmpegPath": "C:\\pipeline\\bin\\ffmpeg.exe",
+  "pathMappings": [
+    { "from": "//SAN/", "to": "S:/" }
+  ]
+}
+```
+
+`pathMappings` translate the manifest's canonical UNC paths to this machine's drive
+mappings. Everything tunable (poll interval, lease, stall timeout, max attempts) lives in
+the server's SystemConfig and arrives at registration — no per-machine tuning files.
+
+## Run interactively (first-time smoke test)
+
+```bash
+VFXReviewWorker.exe
+```
+
+Logs go to the console-less service log at `%ProgramData%\VFXReviewWorker\logs\worker_YYYYMMDD.log`
+(14-day rolling). Confirm the machine appears on the web **Pipeline → Machines** page, then stop it.
+
+## Install as a Windows service
+
+Run as a studio account with SAN access (works whether or not an artist is logged in):
+
+```powershell
+sc.exe create VFXReviewRenderWorker binPath= "C:\pipeline\VFXReviewWorker\VFXReviewWorker.exe" start= auto obj= "STUDIO\svc-render" password= "<password>"
+sc.exe description VFXReviewRenderWorker "VFXReview render pipeline worker (aerender)"
+sc.exe start VFXReviewRenderWorker
+```
+
+Uninstall: `sc.exe stop VFXReviewRenderWorker && sc.exe delete VFXReviewRenderWorker`.
+
+## Rollout notes (spec §17.2)
+
+- Install on **one** workstation first; add the second after a clean week.
+- Set `render.maxAttempts = 1` in SystemConfig for the first week (observe before auto-retrying).
+- Enter each machine's render windows on the Machines page (`availability`), defaults:
+  weekdays 19:00–08:00 + full weekends; Render Now override = 4 h.
+- The dashboard warns when the two workstations report different AE versions.
+
+## Tests
+
+```bash
+cd RenderWorker
+dotnet test
+```
+
+Covers the progress parser against recorded aerender transcript lines (success, error,
+non-retryable), ETA math, path mapping, log-tail ring buffer, and the output-dir
+clearing guard (only files matching the job's own pattern prefix are ever deleted).

RenderWorker/VFXReviewWorker.Tests/PathMapperTests.cs

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+using VFXReviewWorker;
+using Xunit;
+
+namespace VFXReviewWorker.Tests;
+
+public class PathMapperTests
+{
+    private static PathMapper Mapper(params (string from, string to)[] maps) =>
+        new(maps.Select(m => new PathMapping { From = m.from, To = m.to }));
+
+    [Fact]
+    public void MapsUncToDriveLetter()
+    {
+        var mapper = Mapper(("//SAN/", "S:/"));
+        Assert.Equal(@"S:\renders\UNG_S1\106\shot\v004", mapper.Map("//SAN/renders/UNG_S1/106/shot/v004"));
+    }
+
+    [Fact]
+    public void MapsBackslashInputToo()
+    {
+        var mapper = Mapper(("//SAN/", "S:/"));
+        Assert.Equal(@"S:\projects\a.aep", mapper.Map(@"\\SAN\projects\a.aep"));
+    }
+
+    [Fact]
+    public void CaseInsensitiveMatch()
+    {
+        var mapper = Mapper(("//SAN/", "S:/"));
+        Assert.Equal(@"S:\x", mapper.Map("//san/x"));
+    }
+
+    [Fact]
+    public void FirstMatchingMappingWins()
+    {
+        var mapper = Mapper(("//SAN/renders/", "R:/"), ("//SAN/", "S:/"));
+        Assert.Equal(@"R:\a", mapper.Map("//SAN/renders/a"));
+        Assert.Equal(@"S:\projects\a", mapper.Map("//SAN/projects/a"));
+    }
+
+    [Fact]
+    public void UnmappedPathPassesThroughWithLocalSeparators()
+    {
+        var mapper = Mapper(("//SAN/", "S:/"));
+        Assert.Equal(@"D:\local\thing", mapper.Map("D:/local/thing"));
+    }
+}
+
+public class PrepareOutputDirTests
+{
+    [Fact]
+    public void ClearsOnlyFilesMatchingPatternPrefix()
+    {
+        var dir = Path.Combine(Path.GetTempPath(), "vfxr-test-" + Guid.NewGuid().ToString("N"));
+        Directory.CreateDirectory(dir);
+        try
+        {
+            File.WriteAllText(Path.Combine(dir, "SHOT_cmp_TT_v004.1001.exr"), "old");
+            File.WriteAllText(Path.Combine(dir, "SHOT_cmp_TT_v004.1002.exr"), "old");
+            File.WriteAllText(Path.Combine(dir, "unrelated-notes.txt"), "keep me");
+
+            AerenderRunner.PrepareOutputDir(dir, "SHOT_cmp_TT_v004.[####].exr");
+
+            Assert.False(File.Exists(Path.Combine(dir, "SHOT_cmp_TT_v004.1001.exr")));
+            Assert.False(File.Exists(Path.Combine(dir, "SHOT_cmp_TT_v004.1002.exr")));
+            Assert.True(File.Exists(Path.Combine(dir, "unrelated-notes.txt")));
+        }
+        finally
+        {
+            Directory.Delete(dir, recursive: true);
+        }
+    }
+
+    [Fact]
+    public void CreatesMissingDirectory()
+    {
+        var dir = Path.Combine(Path.GetTempPath(), "vfxr-test-" + Guid.NewGuid().ToString("N"), "v001");
+        try
+        {
+            AerenderRunner.PrepareOutputDir(dir, "X.[####].exr");
+            Assert.True(Directory.Exists(dir));
+        }
+        finally
+        {
+            Directory.Delete(Path.GetDirectoryName(dir)!, recursive: true);
+        }
+    }
+}

RenderWorker/VFXReviewWorker.Tests/ProgressParserTests.cs

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+using VFXReviewWorker;
+using Xunit;
+
+namespace VFXReviewWorker.Tests;
+
+/// <summary>
+/// Recorded-transcript tests (§17.2): lines below are representative aerender
+/// stdout from AE 2024/2025/2026 successes, errors, and stalls.
+/// </summary>
+public class ProgressParserTests
+{
+    [Theory]
+    [InlineData("PROGRESS:  0:00:02:03 (51): 0 Seconds", 51)]
+    [InlineData("PROGRESS: 2 (2): 1 Seconds", 2)]
+    [InlineData("PROGRESS:  0:00:00:00 (1): 12 Seconds", 1)]
+    [InlineData("PROGRESS:  0:00:04:23 (120): 3 Seconds", 120)]
+    public void ParsesProgressFrames(string line, int expected)
+    {
+        Assert.Equal(expected, ProgressParser.ParseFrame(line));
+    }
+
+    [Theory]
+    [InlineData("PROGRESS: Rendering frame data")]
+    [InlineData("Starting composition \"UNG_106_010_020_cmp\".")]
+    [InlineData("aerender version 24.3x52")]
+    [InlineData("")]
+    public void IgnoresNonFrameLines(string line)
+    {
+        Assert.Null(ProgressParser.ParseFrame(line));
+    }
+
+    [Theory]
+    [InlineData("aerender ERROR: An existing connection was forcibly closed")]
+    [InlineData("aerender ERROR -1610153464: After Effects error")]
+    [InlineData("ERROR: Unable to open project")]
+    [InlineData("aerender SYNTAX ERROR: Illegal argument flag: false")]
+    public void DetectsErrorLines(string line)
+    {
+        Assert.True(ProgressParser.IsErrorLine(line));
+    }
+
+    [Fact]
+    public void ProgressLineIsNotAnError()
+    {
+        Assert.False(ProgressParser.IsErrorLine("PROGRESS:  0:00:02:03 (51): 0 Seconds"));
+    }
+
+    [Theory]
+    [InlineData("aerender ERROR: After Effects error: layer source file is missing or inaccessible")]
+    [InlineData("aerender ERROR: No comp was found with the given name.")]
+    [InlineData("aerender ERROR: project file could not be opened")]
+    [InlineData("WARNING: Missing footage in comp")]
+    [InlineData("aerender SYNTAX ERROR: Illegal argument flag: false")]
+    public void DeterministicErrorsAreNonRetryable(string line)
+    {
+        Assert.True(ProgressParser.IsNonRetryableError(line));
+    }
+
+    [Theory]
+    [InlineData("aerender ERROR: An existing connection was forcibly closed")]
+    [InlineData("aerender ERROR -1610153464: After Effects crashed")]
+    public void TransientErrorsStayRetryable(string line)
+    {
+        Assert.False(ProgressParser.IsNonRetryableError(line));
+    }
+}
+
+public class EtaCalculatorTests
+{
+    [Fact]
+    public void NoFramesMeansNoEstimate()
+    {
+        var eta = new EtaCalculator();
+        Assert.Null(eta.EstimateSeconds(100));
+    }
+
+    [Fact]
+    public void EstimatesFromRollingAverage()
+    {
+        var eta = new EtaCalculator();
+        var t = DateTimeOffset.UtcNow;
+        eta.RecordFrame(t);
+        eta.RecordFrame(t.AddSeconds(2));
+        eta.RecordFrame(t.AddSeconds(4)); // 2 s/frame average
+        Assert.Equal(20, eta.EstimateSeconds(10));
+    }
+
+    [Fact]
+    public void ZeroRemainingMeansNoEstimate()
+    {
+        var eta = new EtaCalculator();
+        var t = DateTimeOffset.UtcNow;
+        eta.RecordFrame(t);
+        eta.RecordFrame(t.AddSeconds(1));
+        Assert.Null(eta.EstimateSeconds(0));
+    }
+
+    [Fact]
+    public void RollingWindowDropsOldFrames()
+    {
+        var eta = new EtaCalculator(windowSize: 2);
+        var t = DateTimeOffset.UtcNow;
+        eta.RecordFrame(t);
+        eta.RecordFrame(t.AddSeconds(100)); // old slow frame, will roll out
+        eta.RecordFrame(t.AddSeconds(101));
+        eta.RecordFrame(t.AddSeconds(102)); // window now [1, 1]
+        Assert.Equal(10, eta.EstimateSeconds(10));
+    }
+}
+
+public class LogTailTests
+{
+    [Fact]
+    public void KeepsOnlyLastNLines()
+    {
+        var tail = new LogTail(3);
+        for (var i = 1; i <= 5; i++) tail.Add($"line {i}");
+        Assert.Equal("line 3\nline 4\nline 5", tail.ToString());
+    }
+}

RenderWorker/VFXReviewWorker.Tests/VFXReviewWorker.Tests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\VFXReviewWorker\VFXReviewWorker.csproj" />
+  </ItemGroup>
+
+</Project>

RenderWorker/VFXReviewWorker/AeSession.cs

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+using System.Diagnostics;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Detects an *interactive* After Effects session on this machine.
+///
+/// This matters because `AfterFX.com -noui -r script.jsx` is handed to an
+/// already-running After Effects instance rather than starting an isolated
+/// one — so running the preview build while an artist has AE open would take
+/// over their session and quit it, losing unsaved work.
+///
+/// Deliberately conservative: this matches any After Effects process, the
+/// interactive `AfterFX.exe` as well as the `AfterFX.com` render engine that
+/// aerender drives. Waiting for either to finish also avoids two AE instances
+/// competing for the same box, and the worst case is only that a preview build
+/// starts a little later.
+/// </summary>
+public static class AeSession
+{
+    public static bool InteractiveRunning()
+    {
+        try
+        {
+            return Process.GetProcessesByName("AfterFX").Length > 0;
+        }
+        catch
+        {
+            // If we cannot tell, assume an artist is working — never risk their session.
+            return true;
+        }
+    }
+}

RenderWorker/VFXReviewWorker/AerenderRunner.cs

@@ -0,0 +1,298 @@
+using System.Diagnostics;
+using System.Text;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+public sealed record RenderResult(
+    bool Success,
+    int ExitCode,
+    bool Retryable,
+    string? ErrorMessage,
+    string LogTail,
+    string FullLogPath,
+    double RenderSeconds);
+
+/// <summary>
+/// Stage 1: aerender execution (§7.3). Launches aerender.exe, parses stdout
+/// for PROGRESS/ERROR lines, reports progress (renewing the lease), enforces
+/// the stall timeout, and honours cancellation by killing the process tree.
+/// </summary>
+public sealed class AerenderRunner
+{
+    private readonly WorkerOptions _options;
+    private readonly ApiClient _api;
+    private readonly ILogger<AerenderRunner> _log;
+
+    public AerenderRunner(WorkerOptions options, ApiClient api, ILogger<AerenderRunner> log)
+    {
+        _options = options;
+        _api = api;
+        _log = log;
+    }
+
+    /// <summary>
+    /// Renders every queued item in an already-prepared project (no -comp), used
+    /// by the preview stage: the build script saved an AEP with the MOV and MP4
+    /// output modules already queued, so one launch produces both.
+    /// </summary>
+    public Task<RenderResult> RunProjectAsync(
+        string jobId,
+        string machineId,
+        string projectPathLocal,
+        int totalFrames,
+        ServerConfig config,
+        CancellationToken cancelJob,
+        CancellationToken shutdown)
+    {
+        var args = new List<string> { "-project", projectPathLocal, "-mp" };
+        _log.LogInformation("Rendering prepared project for job {JobId}: {Project}", jobId, projectPathLocal);
+        return ExecuteAsync(jobId, machineId, args, totalFrames, 0, config, $"aerender_{jobId}_preview.log", cancelJob, shutdown);
+    }
+
+    public async Task<RenderResult> RunAsync(
+        ClaimedJob job,
+        RenderManifest m,
+        string machineId,
+        string outputDirLocal,
+        ServerConfig config,
+        CancellationToken cancelJob,
+        CancellationToken shutdown)
+    {
+        var mapper = new PathMapper(_options.PathMappings);
+        var aepLocal = mapper.Map(m.AepPath);
+        var outputArg = Path.Combine(outputDirLocal, m.OutputPattern);
+
+        PrepareOutputDir(outputDirLocal, m.OutputPattern);
+
+        var args = new List<string>
+        {
+            "-project", aepLocal,
+            "-comp", m.CompName,
+            "-s", m.FrameStart.ToString(),
+            "-e", m.FrameEnd.ToString(),
+        };
+        if (!string.IsNullOrEmpty(m.RenderSettingsTemplate)) { args.Add("-RStemplate"); args.Add(m.RenderSettingsTemplate); }
+        if (!string.IsNullOrEmpty(m.OutputModuleTemplate)) { args.Add("-OMtemplate"); args.Add(m.OutputModuleTemplate); }
+        args.Add("-output"); args.Add(outputArg);
+        // NB: no "-continueOnMissingFootage" — the real flag takes no value
+        // (passing "false" is an aerender SYNTAX ERROR), and its *presence*
+        // enables skipping missing footage. aerender's default is to stop on
+        // missing footage, which is exactly what the pipeline wants.
+
+        _log.LogInformation("Launching aerender for job {JobId}: {Aep} comp \"{Comp}\" frames {S}-{E} → {Out}",
+            job.Id, aepLocal, m.CompName, m.FrameStart, m.FrameEnd, outputArg);
+
+        return await ExecuteAsync(job.Id, machineId, args, m.TotalFrames, m.FrameStart, config,
+            $"aerender_{job.Id}.log", cancelJob, shutdown);
+    }
+
+    private async Task<RenderResult> ExecuteAsync(
+        string jobId,
+        string machineId,
+        List<string> args,
+        int totalFrames,
+        int frameStart,
+        ServerConfig config,
+        string logFileName,
+        CancellationToken cancelJob,
+        CancellationToken shutdown)
+    {
+        var fullLogPath = Path.Combine(WorkerOptions.LogsDir, logFileName);
+        Directory.CreateDirectory(WorkerOptions.LogsDir);
+
+        var psi = new ProcessStartInfo
+        {
+            FileName = _options.AerenderPath,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+            StandardOutputEncoding = Encoding.UTF8,
+            StandardErrorEncoding = Encoding.UTF8,
+        };
+        foreach (var a in args) psi.ArgumentList.Add(a);
+
+        var tail = new LogTail(200);
+        var eta = new EtaCalculator();
+        var sw = Stopwatch.StartNew();
+        var lastProgressAt = DateTimeOffset.UtcNow;
+        var lastReportAt = DateTimeOffset.MinValue;
+        int framesDone = 0;
+        string? firstError = null;
+        bool nonRetryable = false;
+        bool cancelledByServer = false;
+
+        using var process = new Process { StartInfo = psi };
+        await using var fullLog = new StreamWriter(fullLogPath, append: false, Encoding.UTF8);
+        var logLock = new object();
+
+        void HandleLine(string? line, bool isStderr)
+        {
+            if (line is null) return;
+            lock (logLock)
+            {
+                fullLog.WriteLine(line);
+                tail.Add(line);
+            }
+            var frame = ProgressParser.ParseFrame(line);
+            if (frame is not null)
+            {
+                framesDone = Math.Max(framesDone, frame.Value);
+                lastProgressAt = DateTimeOffset.UtcNow;
+                eta.RecordFrame(lastProgressAt);
+            }
+            if ((isStderr || ProgressParser.IsErrorLine(line)) && !string.IsNullOrWhiteSpace(line))
+            {
+                if (ProgressParser.IsErrorLine(line)) firstError ??= line.Trim();
+                if (ProgressParser.IsNonRetryableError(line)) nonRetryable = true;
+            }
+        }
+
+        process.OutputDataReceived += (_, e) => HandleLine(e.Data, isStderr: false);
+        process.ErrorDataReceived += (_, e) => HandleLine(e.Data, isStderr: true);
+
+        try
+        {
+            process.Start();
+        }
+        catch (Exception ex)
+        {
+            return new RenderResult(false, -1, Retryable: false,
+                $"Failed to launch aerender at {_options.AerenderPath}: {ex.Message}",
+                tail.ToString(), fullLogPath, 0);
+        }
+        process.BeginOutputReadLine();
+        process.BeginErrorReadLine();
+
+        var total = totalFrames;
+        while (!process.HasExited)
+        {
+            await Task.Delay(TimeSpan.FromSeconds(2), CancellationToken.None);
+
+            if (cancelJob.IsCancellationRequested || shutdown.IsCancellationRequested)
+            {
+                _log.LogWarning("Cancellation requested — killing aerender tree for job {JobId}", jobId);
+                KillTree(process);
+                cancelledByServer = cancelJob.IsCancellationRequested;
+                break;
+            }
+
+            // Stall watchdog (§7.3): no progress line for stallTimeoutSeconds → kill
+            if ((DateTimeOffset.UtcNow - lastProgressAt).TotalSeconds > config.StallTimeoutSeconds)
+            {
+                _log.LogError("aerender stalled ({Sec}s without progress) — killing job {JobId}", config.StallTimeoutSeconds, jobId);
+                KillTree(process);
+                await WaitForExitSafe(process);
+                return new RenderResult(false, -2, Retryable: true,
+                    $"aerender produced no progress for {config.StallTimeoutSeconds}s (stall timeout)",
+                    tail.ToString(), fullLogPath, sw.Elapsed.TotalSeconds);
+            }
+
+            // Progress report every ~10 s (renews lease); best-effort
+            if ((DateTimeOffset.UtcNow - lastReportAt).TotalSeconds >= 10)
+            {
+                lastReportAt = DateTimeOffset.UtcNow;
+                var progress = total > 0 ? Math.Min(1.0, (double)framesDone / total) : 0;
+                try
+                {
+                    var resp = await _api.ProgressAsync(jobId, machineId, progress,
+                        framesDone > 0 ? frameStart + framesDone - 1 : null,
+                        total, eta.EstimateSeconds(total - framesDone), tail.ToString(), shutdown);
+                    if (resp?.CancelRequested == true)
+                    {
+                        _log.LogWarning("Server requested cancel for job {JobId}", jobId);
+                        KillTree(process);
+                        cancelledByServer = true;
+                        break;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _log.LogDebug(ex, "Progress report failed (non-fatal; lease covered by reaper)");
+                }
+            }
+        }
+
+        await WaitForExitSafe(process);
+        sw.Stop();
+        lock (logLock) { fullLog.Flush(); }
+
+        if (cancelledByServer)
+        {
+            return new RenderResult(false, -3, Retryable: false, "Cancelled", tail.ToString(), fullLogPath, sw.Elapsed.TotalSeconds);
+        }
+
+        var exitCode = process.ExitCode;
+        if (exitCode == 0 && firstError is null)
+        {
+            return new RenderResult(true, 0, true, null, tail.ToString(), fullLogPath, sw.Elapsed.TotalSeconds);
+        }
+        return new RenderResult(false, exitCode, Retryable: !nonRetryable,
+            firstError ?? $"aerender exited with code {exitCode}",
+            tail.ToString(), fullLogPath, sw.Elapsed.TotalSeconds);
+    }
+
+    /// <summary>
+    /// §7.3: outputDir is created before launch; a pre-existing non-empty dir
+    /// can only hold output from a previous crashed attempt of this same
+    /// immutable version. Safety guard: only files matching the job's own
+    /// output pattern prefix are ever deleted.
+    /// </summary>
+    /// <summary>Filename prefix of an output pattern ("X.[####].exr" → "X").</summary>
+    internal static string OutputPatternPrefix(string outputPattern)
+    {
+        var bracket = outputPattern.IndexOf('[');
+        return bracket > 0 ? outputPattern[..bracket].TrimEnd('.') : Path.GetFileNameWithoutExtension(outputPattern);
+    }
+
+    internal static void PrepareOutputDir(string outputDirLocal, string outputPattern)
+    {
+        Directory.CreateDirectory(outputDirLocal);
+        var prefix = OutputPatternPrefix(outputPattern);
+        if (string.IsNullOrEmpty(prefix)) return;
+        foreach (var file in Directory.EnumerateFiles(outputDirLocal))
+        {
+            if (Path.GetFileName(file).StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
+            {
+                try { File.Delete(file); } catch { /* locked leftovers surface as an aerender error */ }
+            }
+        }
+    }
+
+    private static void KillTree(Process process)
+    {
+        try
+        {
+            if (!process.HasExited) process.Kill(entireProcessTree: true);
+        }
+        catch { /* already gone */ }
+    }
+
+    private static async Task WaitForExitSafe(Process process)
+    {
+        try { await process.WaitForExitAsync(new CancellationTokenSource(TimeSpan.FromSeconds(30)).Token); }
+        catch { try { process.Kill(entireProcessTree: true); } catch { } }
+    }
+}
+
+/// <summary>Ring buffer of the last N output lines (§5.3 logTail).</summary>
+public sealed class LogTail
+{
+    private readonly Queue<string> _lines;
+    private readonly int _capacity;
+
+    public LogTail(int capacity)
+    {
+        _capacity = capacity;
+        _lines = new Queue<string>(capacity);
+    }
+
+    public void Add(string line)
+    {
+        _lines.Enqueue(line);
+        while (_lines.Count > _capacity) _lines.Dequeue();
+    }
+
+    public override string ToString() => string.Join('\n', _lines);
+}

RenderWorker/VFXReviewWorker/ApiClient.cs

@@ -0,0 +1,184 @@
+using System.Net;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// HTTP client for the VFXReview /api/ext pipeline endpoints. Workers talk
+/// only HTTP — never a database (§2.1 principle 4).
+/// </summary>
+public sealed class ApiClient
+{
+    private readonly HttpClient _http;
+    private readonly ILogger<ApiClient> _log;
+
+    public ApiClient(WorkerOptions options, ILogger<ApiClient> log)
+    {
+        _log = log;
+        _http = new HttpClient
+        {
+            BaseAddress = new Uri(options.ServerUrl.TrimEnd('/') + "/"),
+            Timeout = TimeSpan.FromSeconds(30),
+        };
+        _http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", options.ApiKey);
+    }
+
+    private static readonly JsonSerializerOptions Json = WorkerOptions.JsonOpts;
+
+    // E6
+    public async Task<RegisterResponse> RegisterAsync(WorkerOptions o, CancellationToken ct)
+    {
+        var res = await _http.PostAsJsonAsync("api/ext/workers/register", new
+        {
+            name = o.MachineName,
+            hostname = Dns.GetHostName(),
+            workerVersion = o.WorkerVersion,
+            aeVersion = o.AeVersion,
+            capabilities = new { maxConcurrentJobs = 1, tools = new { ffmpeg = o.FfmpegPath != null, oiiotool = o.OiiotoolPath != null } },
+        }, Json, ct);
+        res.EnsureSuccessStatusCode();
+        return (await res.Content.ReadFromJsonAsync<RegisterResponse>(Json, ct))!;
+    }
+
+    // E7
+    public async Task<HeartbeatResponse> HeartbeatAsync(string machineId, string? currentJobId, CancellationToken ct)
+    {
+        var res = await _http.PostAsJsonAsync($"api/ext/workers/{machineId}/heartbeat", new
+        {
+            cpuPercent = (double?)null,
+            memPercent = (double?)null,
+            diskFreeGb = GetDiskFreeGb(),
+            currentJobId,
+        }, Json, ct);
+        res.EnsureSuccessStatusCode();
+        return (await res.Content.ReadFromJsonAsync<HeartbeatResponse>(Json, ct))!;
+    }
+
+    // E8 — null when the queue is empty / machine outside its render window (204)
+    public async Task<ClaimedJob?> ClaimAsync(string machineId, string[] types, CancellationToken ct)
+    {
+        var res = await _http.PostAsJsonAsync("api/ext/render/jobs/claim", new
+        {
+            machineId,
+            types,
+        }, Json, ct);
+        if (res.StatusCode == HttpStatusCode.NoContent) return null;
+        res.EnsureSuccessStatusCode();
+        var body = await res.Content.ReadFromJsonAsync<ClaimResponse>(Json, ct);
+        return body?.Job;
+    }
+
+    // E9 — best-effort; failures are swallowed by the caller (lease/reaper covers us)
+    public async Task<ProgressResponse?> ProgressAsync(string jobId, string machineId, double progress,
+        int? currentFrame, int? totalFrames, int? etaSeconds, string? logTail, CancellationToken ct)
+    {
+        using var req = new HttpRequestMessage(HttpMethod.Patch, $"api/ext/render/jobs/{jobId}/progress")
+        {
+            Content = JsonContent.Create(new { machineId, progress, currentFrame, totalFrames, etaSeconds, logTail }, options: Json),
+        };
+        var res = await _http.SendAsync(req, ct);
+        if (!res.IsSuccessStatusCode) return null;
+        return await res.Content.ReadFromJsonAsync<ProgressResponse>(Json, ct);
+    }
+
+    // E10 / E11 — lifecycle reports, sent via the spooler for durability.
+    // Returns true when the server accepted (2xx) OR permanently rejected (409
+    // contradictory / 404 gone) — both mean "stop retrying".
+    public async Task<bool> SendLifecycleAsync(string kind, string jobId, Dictionary<string, object?> payload, CancellationToken ct)
+    {
+        var path = kind switch
+        {
+            "fail" => $"api/ext/render/jobs/{jobId}/fail",
+            "complete-render" => $"api/ext/render/jobs/{jobId}/complete-render",
+            "finalize" => $"api/ext/render/jobs/{jobId}/finalize",
+            _ => throw new ArgumentOutOfRangeException(nameof(kind), kind, "unknown lifecycle report kind"),
+        };
+        var res = await _http.PostAsJsonAsync(path, payload, Json, ct);
+        if (res.IsSuccessStatusCode) return true;
+        if (res.StatusCode is HttpStatusCode.Conflict or HttpStatusCode.NotFound)
+        {
+            _log.LogWarning("Server permanently rejected {Kind} for job {JobId}: {Status} {Body}",
+                kind, jobId, (int)res.StatusCode, await res.Content.ReadAsStringAsync(ct));
+            return true; // don't retry contradictory/vanished reports
+        }
+        _log.LogWarning("Lifecycle report {Kind} for {JobId} failed with {Status}; will retry", kind, jobId, (int)res.StatusCode);
+        return false;
+    }
+
+    // E20 + PUT upload. Returns the storage key, or null when the upload failed.
+    public async Task<string?> UploadArtifactAsync(
+        string jobId, string machineId, string kind, string filePath, string contentType, CancellationToken ct)
+    {
+        try
+        {
+            if (!File.Exists(filePath))
+            {
+                _log.LogWarning("Artifact {Kind} not found at {Path}", kind, filePath);
+                return null;
+            }
+
+            var presignRes = await _http.PostAsJsonAsync($"api/ext/render/jobs/{jobId}/artifact-presign", new
+            {
+                machineId,
+                kind,
+                fileName = Path.GetFileName(filePath),
+                contentType,
+            }, Json, ct);
+            if (!presignRes.IsSuccessStatusCode)
+            {
+                _log.LogWarning("Presign for {Kind} failed: {Status}", kind, (int)presignRes.StatusCode);
+                return null;
+            }
+            var presign = await presignRes.Content.ReadFromJsonAsync<PresignResponse>(Json, ct);
+            if (presign is null) return null;
+
+            // Media files can be large — generous timeout, separate client so the
+            // presigned URL is not sent with our Authorization header.
+            using var upload = new HttpClient { Timeout = TimeSpan.FromMinutes(30) };
+            await using var stream = File.OpenRead(filePath);
+            var content = new StreamContent(stream);
+            content.Headers.ContentType = new MediaTypeHeaderValue(contentType);
+            var putRes = await upload.PutAsync(presign.PresignedUrl, content, ct);
+            if (!putRes.IsSuccessStatusCode)
+            {
+                _log.LogWarning("Upload of {Kind} failed: {Status}", kind, (int)putRes.StatusCode);
+                return null;
+            }
+            return presign.Key;
+        }
+        catch (Exception ex)
+        {
+            _log.LogWarning(ex, "Artifact upload ({Kind}) failed for job {JobId}", kind, jobId);
+            return null;
+        }
+    }
+
+    public Task<string?> UploadLogAsync(string jobId, string machineId, string logFilePath, CancellationToken ct) =>
+        UploadArtifactAsync(jobId, machineId, "log", logFilePath, "text/plain", ct);
+
+    // E3 — used by crash-recovery reconcile (§7.5)
+    public async Task<ExportDetail?> GetExportAsync(string exportId, CancellationToken ct)
+    {
+        var res = await _http.GetAsync($"api/ext/exports/{exportId}", ct);
+        if (!res.IsSuccessStatusCode) return null;
+        var body = await res.Content.ReadFromJsonAsync<ExportDetailResponse>(Json, ct);
+        return body?.Export;
+    }
+
+    private static double? GetDiskFreeGb()
+    {
+        try
+        {
+            var root = Path.GetPathRoot(Environment.SystemDirectory);
+            if (root is null) return null;
+            return Math.Round(new DriveInfo(root).AvailableFreeSpace / 1_073_741_824.0, 1);
+        }
+        catch
+        {
+            return null;
+        }
+    }
+}

RenderWorker/VFXReviewWorker/Dtos.cs

@@ -0,0 +1,189 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace VFXReviewWorker;
+
+// Wire types for the /api/ext pipeline endpoints (RenderPipeline2 §6).
+
+public sealed class RegisterResponse
+{
+    public MachineInfo Machine { get; set; } = new();
+    public ServerConfig Config { get; set; } = new();
+}
+
+public sealed class MachineInfo
+{
+    public string Id { get; set; } = "";
+    public string Name { get; set; } = "";
+    public bool Enabled { get; set; }
+}
+
+/// <summary>Server-supplied tuning (E6) — fleet-tunable without touching installs.</summary>
+public sealed class ServerConfig
+{
+    public int PollSeconds { get; set; } = 10;
+    public int HeartbeatSeconds { get; set; } = 30;
+    public int LeaseSeconds { get; set; } = 300;
+    public int MaxAttempts { get; set; } = 3;
+    public int StallTimeoutSeconds { get; set; } = 600;
+}
+
+public sealed class ClaimResponse
+{
+    public ClaimedJob Job { get; set; } = new();
+}
+
+public sealed class ClaimedJob
+{
+    public string Id { get; set; } = "";
+    public string Type { get; set; } = "AE_RENDER";
+    public int Attempt { get; set; }
+    public int MaxAttempts { get; set; }
+    public string? ExportId { get; set; }
+    public DateTimeOffset? LeaseExpiresAt { get; set; }
+
+    /// <summary>Manifest shape depends on the job type — deserialize per stage.</summary>
+    public JsonElement Manifest { get; set; }
+
+    public RenderManifest AsRenderManifest() =>
+        Manifest.Deserialize<RenderManifest>(WorkerOptions.JsonOpts)
+        ?? throw new InvalidOperationException("Job manifest is not a render manifest");
+
+    public PreviewManifest AsPreviewManifest() =>
+        Manifest.Deserialize<PreviewManifest>(WorkerOptions.JsonOpts)
+        ?? throw new InvalidOperationException("Job manifest is not a preview manifest");
+}
+
+/// <summary>PREVIEW_ONLY manifest (server-built, RenderPipeline2 §9).</summary>
+public sealed class PreviewManifest
+{
+    public string Stage { get; set; } = "PREVIEW";
+    public string ExportId { get; set; } = "";
+    public string ShotCode { get; set; } = "";
+    public string VersionString { get; set; } = "";
+    public string OutputDir { get; set; } = "";
+    public string OutputPattern { get; set; } = "";
+    public int FrameStart { get; set; }
+    public int FrameEnd { get; set; }
+    public double Fps { get; set; } = 24;
+    public string TemplateAep { get; set; } = "";
+    public string TemplateComp { get; set; } = "";
+    public string? OverlayComp { get; set; }
+    public string? LutComp { get; set; }
+    public string MovTemplate { get; set; } = "";
+    public string Mp4Template { get; set; } = "";
+    public string MovOutput { get; set; } = "";
+    public string Mp4Output { get; set; } = "";
+    public string? SlateScopeProp { get; set; }
+    public string? SlateSubmissionProp { get; set; }
+    public SlateInfo Slate { get; set; } = new();
+
+    public int TotalFrames => FrameEnd - FrameStart + 1;
+}
+
+public sealed class SlateInfo
+{
+    public string VersionName { get; set; } = "";
+    public string Date { get; set; } = "";
+    public string? Description { get; set; }
+    public string? Notes { get; set; }
+    public string ShotCode { get; set; } = "";
+    public string? Episode { get; set; }
+    public string? Scene { get; set; }
+    public string? VfxScope { get; set; }
+    public string? SubmissionNote { get; set; }
+}
+
+/// <summary>Result JSON written by vfxr_build_preview.jsx.</summary>
+public sealed class PreviewBuildResult
+{
+    public bool Ok { get; set; }
+    public string? Error { get; set; }
+    public List<string> Warnings { get; set; } = new();
+    public string? TempAep { get; set; }
+    public string? PreviewComp { get; set; }
+    public int? FrameCount { get; set; }
+    public int? Width { get; set; }
+    public int? Height { get; set; }
+}
+
+/// <summary>The Render Manifest (§6.2) — only the fields the Phase 2 render stage needs; the rest is preserved raw.</summary>
+public sealed class RenderManifest
+{
+    public string AepPath { get; set; } = "";
+    public string CompName { get; set; } = "";
+    public string OutputDir { get; set; } = "";
+    public string OutputPattern { get; set; } = "";
+    public string? OutputModuleTemplate { get; set; }
+    public string? RenderSettingsTemplate { get; set; }
+    public int FrameStart { get; set; }
+    public int FrameEnd { get; set; }
+
+    [JsonExtensionData]
+    public Dictionary<string, JsonElement>? Extra { get; set; }
+
+    public int TotalFrames => FrameEnd - FrameStart + 1;
+}
+
+public sealed class ProgressResponse
+{
+    public bool Ok { get; set; }
+    public bool CancelRequested { get; set; }
+    public DateTimeOffset? LeaseExpiresAt { get; set; }
+}
+
+public sealed class HeartbeatResponse
+{
+    public bool Ok { get; set; }
+    public List<WorkerCommand> Commands { get; set; } = new();
+}
+
+public sealed class WorkerCommand
+{
+    public string Type { get; set; } = "";
+    public string? JobId { get; set; }
+}
+
+public sealed class PresignResponse
+{
+    public string PresignedUrl { get; set; } = "";
+    public string Key { get; set; } = "";
+    public string Url { get; set; } = "";
+}
+
+public sealed class ExportDetailResponse
+{
+    public ExportDetail Export { get; set; } = new();
+}
+
+public sealed class ExportDetail
+{
+    public string Id { get; set; } = "";
+    public string Status { get; set; } = "";
+    public List<RenderJobDetail> RenderJobs { get; set; } = new();
+}
+
+public sealed class RenderJobDetail
+{
+    public string Id { get; set; } = "";
+    public string Status { get; set; } = "";
+}
+
+/// <summary>Durable lifecycle report persisted to the spool directory (§7.6).</summary>
+public sealed class SpooledReport
+{
+    public string Kind { get; set; } = ""; // "fail" | "complete-render"
+    public string JobId { get; set; } = "";
+    public Dictionary<string, object?> Payload { get; set; } = new();
+    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
+}
+
+/// <summary>current-job.json — crash recovery state (§7.5).</summary>
+public sealed class CurrentJobState
+{
+    public string JobId { get; set; } = "";
+    public string? ExportId { get; set; } = "";
+    public string MachineId { get; set; } = "";
+    public string OutputDirLocal { get; set; } = "";
+    public DateTimeOffset ClaimedAt { get; set; }
+}

RenderWorker/VFXReviewWorker/FileLogger.cs

@@ -0,0 +1,82 @@
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Minimal rolling file logger (§7.9): one file per day under
+/// %ProgramData%\VFXReviewWorker\logs, files older than 14 days pruned on
+/// startup and at midnight rollover. No external logging dependencies.
+/// </summary>
+public sealed class FileLoggerProvider : ILoggerProvider
+{
+    private readonly object _lock = new();
+    private StreamWriter? _writer;
+    private DateOnly _currentDay;
+
+    public FileLoggerProvider()
+    {
+        Directory.CreateDirectory(WorkerOptions.LogsDir);
+        Prune();
+    }
+
+    public ILogger CreateLogger(string categoryName) => new FileLogger(this, categoryName);
+
+    internal void Write(string category, LogLevel level, string message, Exception? ex)
+    {
+        lock (_lock)
+        {
+            var today = DateOnly.FromDateTime(DateTime.Now);
+            if (_writer is null || today != _currentDay)
+            {
+                _writer?.Dispose();
+                _currentDay = today;
+                _writer = new StreamWriter(
+                    Path.Combine(WorkerOptions.LogsDir, $"worker_{today:yyyyMMdd}.log"),
+                    append: true) { AutoFlush = true };
+                Prune();
+            }
+            _writer.WriteLine($"{DateTime.Now:HH:mm:ss.fff} [{level,-5}] {Shorten(category)}: {message}{(ex is null ? "" : $"\n{ex}")}");
+        }
+    }
+
+    private static string Shorten(string category) => category[(category.LastIndexOf('.') + 1)..];
+
+    private static void Prune()
+    {
+        try
+        {
+            var cutoff = DateTime.Now.AddDays(-14);
+            foreach (var f in Directory.EnumerateFiles(WorkerOptions.LogsDir, "*.log"))
+            {
+                if (File.GetLastWriteTime(f) < cutoff) File.Delete(f);
+            }
+        }
+        catch { /* best effort */ }
+    }
+
+    public void Dispose()
+    {
+        lock (_lock) { _writer?.Dispose(); _writer = null; }
+    }
+
+    private sealed class FileLogger : ILogger
+    {
+        private readonly FileLoggerProvider _provider;
+        private readonly string _category;
+
+        public FileLogger(FileLoggerProvider provider, string category)
+        {
+            _provider = provider;
+            _category = category;
+        }
+
+        public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
+        public bool IsEnabled(LogLevel logLevel) => logLevel >= LogLevel.Information;
+
+        public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
+        {
+            if (!IsEnabled(logLevel)) return;
+            _provider.Write(_category, logLevel, formatter(state, exception), exception);
+        }
+    }
+}

RenderWorker/VFXReviewWorker/JobExecutor.cs

@@ -0,0 +1,326 @@
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Executes one claimed job end-to-end: writes crash-recovery state, runs
+/// aerender, uploads the full log, and enqueues the durable complete/fail
+/// report. One job at a time per machine (§7.2).
+/// </summary>
+public sealed class JobExecutor
+{
+    private readonly WorkerOptions _options;
+    private readonly ApiClient _api;
+    private readonly AerenderRunner _runner;
+    private readonly PreviewStage _preview;
+    private readonly ReportSpooler _spooler;
+    private readonly ILogger<JobExecutor> _log;
+
+    public JobExecutor(WorkerOptions options, ApiClient api, AerenderRunner runner, PreviewStage preview, ReportSpooler spooler, ILogger<JobExecutor> log)
+    {
+        _options = options;
+        _api = api;
+        _runner = runner;
+        _preview = preview;
+        _spooler = spooler;
+        _log = log;
+    }
+
+    public async Task RunAsync(ClaimedJob job, string machineId, ServerConfig config, CancellationToken cancelJob, CancellationToken shutdown)
+    {
+        if (job.Type == "PREVIEW_ONLY")
+        {
+            await RunPreviewAsync(job, machineId, config, cancelJob, shutdown);
+            return;
+        }
+
+        var manifest = job.AsRenderManifest();
+        var mapper = new PathMapper(_options.PathMappings);
+        var outputDirLocal = mapper.Map(manifest.OutputDir);
+
+        WriteState(new CurrentJobState
+        {
+            JobId = job.Id,
+            ExportId = job.ExportId,
+            MachineId = machineId,
+            OutputDirLocal = outputDirLocal,
+            ClaimedAt = DateTimeOffset.UtcNow,
+        });
+
+        try
+        {
+            var result = await _runner.RunAsync(job, manifest, machineId, outputDirLocal, config, cancelJob, shutdown);
+            var logKey = await _api.UploadLogAsync(job.Id, machineId, result.FullLogPath, shutdown);
+
+            if (result.Success)
+            {
+                long totalBytes = 0;
+                int fileCount = 0;
+                var prefix = AerenderRunner.OutputPatternPrefix(manifest.OutputPattern);
+                try
+                {
+                    foreach (var f in Directory.EnumerateFiles(outputDirLocal))
+                    {
+                        if (!Path.GetFileName(f).StartsWith(prefix, StringComparison.OrdinalIgnoreCase)) continue;
+                        fileCount++;
+                        totalBytes += new FileInfo(f).Length;
+                    }
+                }
+                catch { /* stats are best-effort in Phase 2; validation owns this in Phase 3 */ }
+
+                if (fileCount == 0)
+                {
+                    // aerender can exit 0 having rendered nothing (bad frame
+                    // range, template mismatch, silently swallowed error).
+                    // Until Phase 3 validation exists, an empty output dir must
+                    // never become READY_FOR_QC.
+                    _log.LogError("Job {JobId}: aerender exited 0 but no \"{Prefix}*\" files exist in {Dir} — reporting failure",
+                        job.Id, prefix, outputDirLocal);
+                    _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+                    {
+                        ["machineId"] = machineId,
+                        ["stage"] = "RENDER",
+                        ["exitCode"] = 0,
+                        ["errorMessage"] = "aerender exited 0 but produced no output files in " + outputDirLocal,
+                        ["logTail"] = result.LogTail,
+                        ["logFileKey"] = logKey,
+                        ["retryable"] = false,
+                    });
+                    return;
+                }
+
+                _log.LogInformation("Job {JobId} complete: {Frames} frames in {Sec:F0}s ({Files} files, {Bytes} bytes)",
+                    job.Id, manifest.TotalFrames, result.RenderSeconds, fileCount, totalBytes);
+                _spooler.Enqueue("complete-render", job.Id, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["renderSeconds"] = (int)result.RenderSeconds,
+                    ["logFileKey"] = logKey,
+                    ["logTail"] = result.LogTail,
+                    ["exrFileCount"] = fileCount,
+                    ["exrTotalBytes"] = totalBytes,
+                });
+            }
+            else if (result.ErrorMessage == "Cancelled")
+            {
+                // Ack the cancel so the server clears the CANCEL_JOB command
+                _log.LogInformation("Job {JobId} cancelled — acknowledging", job.Id);
+                _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["stage"] = "RENDER",
+                    ["errorMessage"] = "Cancelled by server",
+                    ["logTail"] = result.LogTail,
+                    ["logFileKey"] = logKey,
+                    ["retryable"] = false,
+                });
+            }
+            else
+            {
+                _log.LogError("Job {JobId} failed (exit {Exit}, retryable {Retryable}): {Error}",
+                    job.Id, result.ExitCode, result.Retryable, result.ErrorMessage);
+                _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["stage"] = "RENDER",
+                    ["exitCode"] = result.ExitCode,
+                    ["errorMessage"] = result.ErrorMessage,
+                    ["logTail"] = result.LogTail,
+                    ["logFileKey"] = logKey,
+                    ["retryable"] = result.Retryable,
+                });
+            }
+        }
+        catch (Exception ex)
+        {
+            _log.LogError(ex, "Unexpected executor error for job {JobId}", job.Id);
+            _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+            {
+                ["machineId"] = machineId,
+                ["stage"] = "RENDER",
+                ["errorMessage"] = $"Worker exception: {ex.Message}",
+                ["retryable"] = true,
+            });
+        }
+        finally
+        {
+            ClearState();
+        }
+    }
+
+    /// <summary>
+    /// PREVIEW_ONLY job: rebuild the shot around the rendered EXRs with slate
+    /// and burn-ins, render the delivery MOV + review MP4, upload the review
+    /// media, and finalize (which registers the internal-only Version).
+    /// </summary>
+    private async Task RunPreviewAsync(ClaimedJob job, string machineId, ServerConfig config, CancellationToken cancelJob, CancellationToken shutdown)
+    {
+        var manifest = job.AsPreviewManifest();
+
+        WriteState(new CurrentJobState
+        {
+            JobId = job.Id,
+            ExportId = job.ExportId,
+            MachineId = machineId,
+            OutputDirLocal = new PathMapper(_options.PathMappings).Map(manifest.OutputDir),
+            ClaimedAt = DateTimeOffset.UtcNow,
+        });
+
+        try
+        {
+            var result = await _preview.RunAsync(job, manifest, machineId, config, cancelJob, shutdown);
+
+            if (!result.Success)
+            {
+                _log.LogError("Preview job {JobId} failed (retryable {Retryable}): {Error}",
+                    job.Id, result.Retryable, result.ErrorMessage);
+                _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["stage"] = "PREVIEW",
+                    ["errorMessage"] = result.ErrorMessage,
+                    ["retryable"] = result.Retryable,
+                });
+                return; // temp AEP is deliberately kept for debugging
+            }
+
+            var previewKey = await _api.UploadArtifactAsync(
+                job.Id, machineId, "preview", result.Mp4Path!, "video/mp4", shutdown);
+            if (previewKey is null)
+            {
+                // The renders are on the SAN and fine — only the upload failed,
+                // so this is worth retrying without rebuilding anything.
+                _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["stage"] = "PREVIEW",
+                    ["errorMessage"] = "Preview MP4 upload failed",
+                    ["retryable"] = true,
+                });
+                return;
+            }
+
+            string? thumbKey = null;
+            if (result.ThumbnailPath is not null)
+            {
+                thumbKey = await _api.UploadArtifactAsync(
+                    job.Id, machineId, "thumbnail", result.ThumbnailPath, "image/jpeg", shutdown);
+            }
+
+            _spooler.Enqueue("finalize", job.Id, new Dictionary<string, object?>
+            {
+                ["machineId"] = machineId,
+                ["artifacts"] = new Dictionary<string, object?>
+                {
+                    ["deliveryMovPath"] = manifest.MovOutput,
+                    ["previewMovKey"] = previewKey,
+                    ["thumbnailKey"] = thumbKey,
+                },
+                ["renderStats"] = new Dictionary<string, object?>
+                {
+                    ["previewSeconds"] = (int)result.Seconds,
+                },
+                ["media"] = new Dictionary<string, object?>
+                {
+                    ["width"] = result.Build?.Width,
+                    ["height"] = result.Build?.Height,
+                    ["frameCount"] = result.Build?.FrameCount,
+                    ["fps"] = manifest.Fps,
+                    ["fileName"] = Path.GetFileName(result.Mp4Path!),
+                },
+            });
+
+            // Only clean up once the outputs are safely reported.
+            CleanScratch(job.Id, result.TempAep);
+        }
+        catch (Exception ex)
+        {
+            _log.LogError(ex, "Unexpected preview error for job {JobId}", job.Id);
+            _spooler.Enqueue("fail", job.Id, new Dictionary<string, object?>
+            {
+                ["machineId"] = machineId,
+                ["stage"] = "PREVIEW",
+                ["errorMessage"] = $"Worker exception: {ex.Message}",
+                ["retryable"] = true,
+            });
+        }
+        finally
+        {
+            ClearState();
+        }
+    }
+
+    private static void CleanScratch(string jobId, string? tempAep)
+    {
+        PreviewStage.TryDelete(Path.Combine(WorkerOptions.ScratchDir, $"job_{jobId}_context.json"));
+        PreviewStage.TryDelete(Path.Combine(WorkerOptions.ScratchDir, $"job_{jobId}_result.json"));
+        PreviewStage.TryDelete(Path.Combine(WorkerOptions.ScratchDir, $"job_{jobId}_run.jsx"));
+        PreviewStage.TryDelete(Path.Combine(WorkerOptions.ScratchDir, $"job_{jobId}_thumb.jpg"));
+        if (tempAep is not null) PreviewStage.TryDelete(tempAep);
+    }
+
+    /// <summary>
+    /// Crash recovery (§7.5): on service start, if current-job.json names a
+    /// job, ask the server what became of it. Still ours (CLAIMED/RUNNING) →
+    /// we crashed mid-render; report a retryable fail so the server requeues
+    /// (never resume a partial aerender). Reassigned/finished → discard state;
+    /// the next attempt's PrepareOutputDir clears any orphaned frames.
+    /// </summary>
+    public async Task ReconcileAsync(string machineId, CancellationToken ct)
+    {
+        var state = ReadState();
+        if (state is null) return;
+        _log.LogWarning("Found crash-recovery state for job {JobId} — reconciling", state.JobId);
+        try
+        {
+            var stillOurs = false;
+            if (!string.IsNullOrEmpty(state.ExportId))
+            {
+                var export = await _api.GetExportAsync(state.ExportId!, ct);
+                var job = export?.RenderJobs.FirstOrDefault(j => j.Id == state.JobId);
+                stillOurs = job?.Status is "CLAIMED" or "RUNNING";
+            }
+            if (stillOurs)
+            {
+                _log.LogWarning("Server still shows job {JobId} as ours — reporting crash for requeue", state.JobId);
+                _spooler.Enqueue("fail", state.JobId, new Dictionary<string, object?>
+                {
+                    ["machineId"] = machineId,
+                    ["stage"] = "RENDER",
+                    ["errorMessage"] = "Worker restarted mid-render (crash/power loss); never resuming a partial render",
+                    ["retryable"] = true,
+                });
+            }
+        }
+        catch (Exception ex)
+        {
+            _log.LogWarning(ex, "Reconcile failed for job {JobId}; discarding local state (reaper covers the lease)", state.JobId);
+        }
+        ClearState();
+    }
+
+    private static void WriteState(CurrentJobState state)
+    {
+        Directory.CreateDirectory(WorkerOptions.DataDir);
+        File.WriteAllText(WorkerOptions.StateFilePath, JsonSerializer.Serialize(state, WorkerOptions.JsonOpts));
+    }
+
+    private static CurrentJobState? ReadState()
+    {
+        try
+        {
+            if (!File.Exists(WorkerOptions.StateFilePath)) return null;
+            return JsonSerializer.Deserialize<CurrentJobState>(File.ReadAllText(WorkerOptions.StateFilePath), WorkerOptions.JsonOpts);
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private static void ClearState()
+    {
+        try { File.Delete(WorkerOptions.StateFilePath); } catch { }
+    }
+}

RenderWorker/VFXReviewWorker/PathMapper.cs

@@ -0,0 +1,36 @@
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Translates canonical UNC paths from manifests to this machine's local
+/// drive mappings (§7.8 pathMappings). Comparison is case-insensitive and
+/// slash-direction tolerant; the first matching mapping wins.
+/// </summary>
+public sealed class PathMapper
+{
+    private readonly List<(string From, string To)> _mappings;
+
+    public PathMapper(IEnumerable<PathMapping> mappings)
+    {
+        _mappings = mappings
+            .Where(m => !string.IsNullOrWhiteSpace(m.From))
+            .Select(m => (Normalize(m.From), m.To))
+            .ToList();
+    }
+
+    private static string Normalize(string p) => p.Replace('\\', '/');
+
+    public string Map(string path)
+    {
+        if (string.IsNullOrEmpty(path)) return path;
+        var normalized = Normalize(path);
+        foreach (var (from, to) in _mappings)
+        {
+            if (normalized.StartsWith(from, StringComparison.OrdinalIgnoreCase))
+            {
+                var mapped = to + normalized[from.Length..];
+                return mapped.Replace('/', Path.DirectorySeparatorChar);
+            }
+        }
+        return path.Replace('/', Path.DirectorySeparatorChar);
+    }
+}

RenderWorker/VFXReviewWorker/PreviewStage.cs

@@ -0,0 +1,283 @@
+using System.Diagnostics;
+using System.Text;
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+public sealed record PreviewStageResult(
+    bool Success,
+    bool Retryable,
+    string? ErrorMessage,
+    string? MovPath,
+    string? Mp4Path,
+    string? ThumbnailPath,
+    string? TempAep,
+    PreviewBuildResult? Build,
+    double Seconds);
+
+/// <summary>
+/// Stage 3 — preview generation (RenderPipeline2 §9), the second half of a
+/// one-click export.
+///
+/// Runs in two steps so the unproven part stays small:
+///   1. AfterFX.com -noui -r  → builds the shot around the rendered EXRs using
+///      the studio slate/overlay template, queues the MOV + MP4 output modules
+///      and saves a throwaway AEP. Does no rendering.
+///   2. aerender -project &lt;that aep&gt; (no -comp) → renders the whole queue in
+///      one launch, through the same proven runner as the EXR stage.
+/// </summary>
+public sealed class PreviewStage
+{
+    private readonly WorkerOptions _options;
+    private readonly AerenderRunner _runner;
+    private readonly ILogger<PreviewStage> _log;
+
+    public PreviewStage(WorkerOptions options, AerenderRunner runner, ILogger<PreviewStage> log)
+    {
+        _options = options;
+        _runner = runner;
+        _log = log;
+    }
+
+    public async Task<PreviewStageResult> RunAsync(
+        ClaimedJob job,
+        PreviewManifest manifest,
+        string machineId,
+        ServerConfig config,
+        CancellationToken cancelJob,
+        CancellationToken shutdown)
+    {
+        var sw = Stopwatch.StartNew();
+        var mapper = new PathMapper(_options.PathMappings);
+        Directory.CreateDirectory(WorkerOptions.ScratchDir);
+
+        var contextPath = Path.Combine(WorkerOptions.ScratchDir, $"job_{job.Id}_context.json");
+        var resultPath = Path.Combine(WorkerOptions.ScratchDir, $"job_{job.Id}_result.json");
+        var wrapperPath = Path.Combine(WorkerOptions.ScratchDir, $"job_{job.Id}_run.jsx");
+        var tempAep = Path.Combine(WorkerOptions.ScratchDir, $"job_{job.Id}_preview.aep");
+
+        var movLocal = mapper.Map(manifest.MovOutput);
+        var mp4Local = mapper.Map(manifest.Mp4Output);
+
+        // Everything the script needs, in machine-local paths.
+        var context = new
+        {
+            jobId = job.Id,
+            exportId = manifest.ExportId,
+            shotCode = manifest.ShotCode,
+            versionString = manifest.VersionString,
+            outputDirLocal = mapper.Map(manifest.OutputDir),
+            templateAep = mapper.Map(manifest.TemplateAep),
+            templateComp = manifest.TemplateComp,
+            overlayComp = manifest.OverlayComp,
+            lutComp = manifest.LutComp,
+            movTemplate = manifest.MovTemplate,
+            mp4Template = manifest.Mp4Template,
+            movOutput = movLocal,
+            mp4Output = mp4Local,
+            tempAep,
+            resultPath,
+            frameStart = manifest.FrameStart,
+            fps = manifest.Fps,
+            slateScopeProp = manifest.SlateScopeProp,
+            slateSubmissionProp = manifest.SlateSubmissionProp,
+            slate = manifest.Slate,
+        };
+
+        await File.WriteAllTextAsync(contextPath, JsonSerializer.Serialize(context, WorkerOptions.JsonOpts), shutdown);
+
+        var scriptPath = _options.ResolvePreviewScriptPath();
+        if (!File.Exists(scriptPath))
+        {
+            return Fail($"Preview build script not found at {scriptPath}", retryable: false, sw);
+        }
+
+        // ExtendScript cannot read argv — hand the context path over through a
+        // generated wrapper that evaluates the shared build script.
+        var wrapper = new StringBuilder()
+            .AppendLine("// generated by VFXReviewWorker — do not edit")
+            .AppendLine($"var VFXR_CONTEXT_PATH = {JsonSerializer.Serialize(contextPath)};")
+            .AppendLine($"$.evalFile({JsonSerializer.Serialize(scriptPath)});")
+            .ToString();
+        await File.WriteAllTextAsync(wrapperPath, wrapper, shutdown);
+
+        TryDelete(resultPath);
+
+        // ── Step 1: headless build ───────────────────────────────────────────
+        var afterFx = _options.ResolveAfterFxPath();
+        if (!File.Exists(afterFx))
+        {
+            return Fail($"AfterFX.com not found at {afterFx}", retryable: false, sw);
+        }
+
+        // Belt and braces: the claim loop already avoids preview jobs while AE
+        // is open, but an artist may have launched it in between. Never take
+        // over a live session — defer instead (retryable).
+        if (AeSession.InteractiveRunning())
+        {
+            return Fail(
+                "An interactive After Effects session is open on this machine — preview build deferred to avoid taking it over",
+                retryable: true, sw);
+        }
+
+        _log.LogInformation("Building preview comp for job {JobId} via {AfterFx}", job.Id, afterFx);
+        var buildExit = await RunAfterFxAsync(afterFx, wrapperPath, config, cancelJob, shutdown);
+
+        if (!File.Exists(resultPath))
+        {
+            return Fail(
+                $"Headless AE produced no result file (exit {buildExit}). Check that AfterFX.com can run under this account.",
+                retryable: true, sw);
+        }
+
+        PreviewBuildResult? build;
+        try
+        {
+            build = JsonSerializer.Deserialize<PreviewBuildResult>(
+                await File.ReadAllTextAsync(resultPath, shutdown), WorkerOptions.JsonOpts);
+        }
+        catch (Exception ex)
+        {
+            return Fail($"Could not parse preview build result: {ex.Message}", retryable: false, sw);
+        }
+
+        if (build is null || !build.Ok)
+        {
+            // A build failure is deterministic (missing template comp, missing
+            // output module, bad layer name) — humans fix the template.
+            return Fail($"Preview build failed: {build?.Error ?? "unknown error"}", retryable: false, sw, build);
+        }
+        foreach (var w in build.Warnings)
+        {
+            _log.LogWarning("Preview build warning (job {JobId}): {Warning}", job.Id, w);
+        }
+        if (string.IsNullOrWhiteSpace(build.TempAep) || !File.Exists(build.TempAep))
+        {
+            return Fail("Preview build reported success but the temp project is missing", retryable: false, sw, build);
+        }
+
+        // ── Step 2: render the prepared queue ────────────────────────────────
+        var render = await _runner.RunProjectAsync(
+            job.Id, machineId, build.TempAep, build.FrameCount ?? manifest.TotalFrames,
+            config, cancelJob, shutdown);
+
+        if (!render.Success)
+        {
+            return new PreviewStageResult(false, render.Retryable, render.ErrorMessage,
+                null, null, null, build.TempAep, build, sw.Elapsed.TotalSeconds);
+        }
+
+        // aerender can exit 0 without writing — verify both outputs exist.
+        var missing = new List<string>();
+        if (!File.Exists(movLocal)) missing.Add(movLocal);
+        if (!File.Exists(mp4Local)) missing.Add(mp4Local);
+        if (missing.Count > 0)
+        {
+            return new PreviewStageResult(false, false,
+                "aerender exited 0 but expected preview outputs are missing: " + string.Join(", ", missing),
+                null, null, null, build.TempAep, build, sw.Elapsed.TotalSeconds);
+        }
+
+        var thumbnail = await TryMakeThumbnailAsync(job.Id, mp4Local, shutdown);
+
+        sw.Stop();
+        _log.LogInformation("Preview complete for job {JobId} in {Sec:F0}s (mov + mp4{Thumb})",
+            job.Id, sw.Elapsed.TotalSeconds, thumbnail is null ? "" : " + thumbnail");
+
+        return new PreviewStageResult(true, true, null, movLocal, mp4Local, thumbnail,
+            build.TempAep, build, sw.Elapsed.TotalSeconds);
+    }
+
+    private async Task<int> RunAfterFxAsync(
+        string afterFx, string wrapperPath, ServerConfig config,
+        CancellationToken cancelJob, CancellationToken shutdown)
+    {
+        var psi = new ProcessStartInfo
+        {
+            FileName = afterFx,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+        };
+        psi.ArgumentList.Add("-noui");
+        psi.ArgumentList.Add("-r");
+        psi.ArgumentList.Add(wrapperPath);
+
+        using var process = new Process { StartInfo = psi };
+        process.OutputDataReceived += (_, e) => { if (!string.IsNullOrWhiteSpace(e.Data)) _log.LogDebug("[AfterFX] {Line}", e.Data); };
+        process.ErrorDataReceived += (_, e) => { if (!string.IsNullOrWhiteSpace(e.Data)) _log.LogDebug("[AfterFX] {Line}", e.Data); };
+
+        process.Start();
+        process.BeginOutputReadLine();
+        process.BeginErrorReadLine();
+
+        // The build does no rendering, so it should finish in well under the
+        // stall timeout. A hang here means AE is waiting on something (a dialog,
+        // a licence prompt) and must be killed rather than left holding the job.
+        using var timeout = CancellationTokenSource.CreateLinkedTokenSource(cancelJob, shutdown);
+        timeout.CancelAfter(TimeSpan.FromSeconds(Math.Max(120, config.StallTimeoutSeconds)));
+        try
+        {
+            await process.WaitForExitAsync(timeout.Token);
+        }
+        catch (OperationCanceledException)
+        {
+            _log.LogError("Headless AE build timed out or was cancelled — killing process tree");
+            try { process.Kill(entireProcessTree: true); } catch { }
+            return -1;
+        }
+        return process.ExitCode;
+    }
+
+    /// <summary>Optional 960-wide poster frame at 25% duration (§9.1). Never fatal.</summary>
+    private async Task<string?> TryMakeThumbnailAsync(string jobId, string mp4Path, CancellationToken ct)
+    {
+        if (string.IsNullOrWhiteSpace(_options.FfmpegPath) || !File.Exists(_options.FfmpegPath))
+        {
+            return null;
+        }
+        var outPath = Path.Combine(WorkerOptions.ScratchDir, $"job_{jobId}_thumb.jpg");
+        TryDelete(outPath);
+
+        var psi = new ProcessStartInfo
+        {
+            FileName = _options.FfmpegPath,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+        };
+        foreach (var a in new[] { "-y", "-i", mp4Path, "-vf", "thumbnail,scale=960:-1", "-frames:v", "1", outPath })
+        {
+            psi.ArgumentList.Add(a);
+        }
+
+        try
+        {
+            using var process = Process.Start(psi);
+            if (process is null) return null;
+            using var timeout = CancellationTokenSource.CreateLinkedTokenSource(ct);
+            timeout.CancelAfter(TimeSpan.FromMinutes(2));
+            await process.WaitForExitAsync(timeout.Token);
+            return File.Exists(outPath) ? outPath : null;
+        }
+        catch (Exception ex)
+        {
+            _log.LogWarning(ex, "Thumbnail generation failed (non-fatal)");
+            return null;
+        }
+    }
+
+    private static PreviewStageResult Fail(string message, bool retryable, Stopwatch sw, PreviewBuildResult? build = null)
+    {
+        sw.Stop();
+        return new PreviewStageResult(false, retryable, message, null, null, null, build?.TempAep, build, sw.Elapsed.TotalSeconds);
+    }
+
+    internal static void TryDelete(string path)
+    {
+        try { if (File.Exists(path)) File.Delete(path); } catch { }
+    }
+}

RenderWorker/VFXReviewWorker/Program.cs

@@ -0,0 +1,30 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using VFXReviewWorker;
+
+// VFXReview RenderWorker (RenderPipeline2 §7) — Windows service driving
+// aerender.exe on artist workstations / render nodes. All state flows through
+// /api/ext/* with API-key auth; the worker never touches the database.
+//
+// Run interactively for debugging:  VFXReviewWorker.exe [path\to\config.json]
+// Install as a service:             see RenderWorker/README.md
+
+var configPath = args.FirstOrDefault(a => !a.StartsWith('-'));
+var options = WorkerOptions.Load(configPath);
+
+// Positional args (config path) are consumed above and deliberately not
+// forwarded — the command-line configuration provider rejects bare tokens.
+var builder = Host.CreateApplicationBuilder();
+builder.Services.AddWindowsService(o => o.ServiceName = "VFXReviewRenderWorker");
+builder.Logging.AddProvider(new FileLoggerProvider());
+
+builder.Services.AddSingleton(options);
+builder.Services.AddSingleton<ApiClient>();
+builder.Services.AddSingleton<ReportSpooler>();
+builder.Services.AddSingleton<AerenderRunner>();
+builder.Services.AddSingleton<PreviewStage>();
+builder.Services.AddSingleton<JobExecutor>();
+builder.Services.AddHostedService<WorkerService>();
+
+await builder.Build().RunAsync();

RenderWorker/VFXReviewWorker/ProgressParser.cs

@@ -0,0 +1,80 @@
+using System.Text.RegularExpressions;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Parses aerender stdout line-by-line (§7.3): PROGRESS lines yield the
+/// current frame; ERROR lines are collected; deterministic errors (missing
+/// footage/comp/project) mark the job non-retryable — humans fix the comp.
+/// </summary>
+public static partial class ProgressParser
+{
+    // e.g. "PROGRESS:  0:00:02:03 (51): 0 Seconds"  /  "PROGRESS: 2 (2): ..."
+    [GeneratedRegex(@"^PROGRESS:.*\((\d+)\)", RegexOptions.Compiled)]
+    private static partial Regex ProgressLine();
+
+    [GeneratedRegex(@"aerender\s+(SYNTAX\s+)?ERROR|^ERROR:", RegexOptions.Compiled | RegexOptions.IgnoreCase)]
+    private static partial Regex ErrorLine();
+
+    private static readonly string[] NonRetryablePatterns =
+    {
+        "missing footage",
+        "layer source file missing",
+        "file is missing",
+        "no comp was found",
+        "no composition",
+        "project file could not be opened",
+        "can not be opened",
+        "cannot be opened",
+        "the file format module could not parse the file",
+        "no render settings template",
+        "no output module template",
+        "syntax error",
+        "illegal argument",
+    };
+
+    /// <summary>Returns the rendered-frame ordinal (1-based within the range) or null.</summary>
+    public static int? ParseFrame(string line)
+    {
+        var m = ProgressLine().Match(line);
+        return m.Success && int.TryParse(m.Groups[1].Value, out var f) ? f : null;
+    }
+
+    public static bool IsErrorLine(string line) => ErrorLine().IsMatch(line);
+
+    /// <summary>Deterministic failures re-render identically — don't burn retries on them.</summary>
+    public static bool IsNonRetryableError(string line)
+    {
+        foreach (var p in NonRetryablePatterns)
+        {
+            if (line.Contains(p, StringComparison.OrdinalIgnoreCase)) return true;
+        }
+        return false;
+    }
+}
+
+/// <summary>ETA = rolling average seconds/frame × frames remaining (§7.3).</summary>
+public sealed class EtaCalculator
+{
+    private readonly int _windowSize;
+    private readonly Queue<double> _frameSeconds = new();
+    private DateTimeOffset? _lastFrameAt;
+
+    public EtaCalculator(int windowSize = 10) => _windowSize = windowSize;
+
+    public void RecordFrame(DateTimeOffset now)
+    {
+        if (_lastFrameAt is { } last)
+        {
+            _frameSeconds.Enqueue((now - last).TotalSeconds);
+            while (_frameSeconds.Count > _windowSize) _frameSeconds.Dequeue();
+        }
+        _lastFrameAt = now;
+    }
+
+    public int? EstimateSeconds(int framesRemaining)
+    {
+        if (_frameSeconds.Count == 0 || framesRemaining <= 0) return null;
+        return (int)Math.Round(_frameSeconds.Average() * framesRemaining);
+    }
+}

RenderWorker/VFXReviewWorker/ReportSpooler.cs

@@ -0,0 +1,91 @@
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Durable lifecycle reports (§7.6): fail/complete reports are written to the
+/// spool directory before the first send attempt and replayed strictly in
+/// order with exponential backoff (1 s → 60 s). Rendering continues during
+/// server downtime; a report is deleted only once the server accepts it (or
+/// permanently rejects it as contradictory).
+/// </summary>
+public sealed class ReportSpooler
+{
+    private readonly ApiClient _api;
+    private readonly ILogger<ReportSpooler> _log;
+    private readonly string _dir;
+    private readonly SemaphoreSlim _wake = new(0);
+    private long _seq;
+
+    public ReportSpooler(ApiClient api, ILogger<ReportSpooler> log, string? dir = null)
+    {
+        _api = api;
+        _log = log;
+        _dir = dir ?? WorkerOptions.SpoolDir;
+        Directory.CreateDirectory(_dir);
+    }
+
+    public void Enqueue(string kind, string jobId, Dictionary<string, object?> payload)
+    {
+        var report = new SpooledReport { Kind = kind, JobId = jobId, Payload = payload };
+        var name = $"{DateTimeOffset.UtcNow.UtcTicks:D20}_{Interlocked.Increment(ref _seq):D6}.json";
+        var tmp = Path.Combine(_dir, name + ".tmp");
+        var final = Path.Combine(_dir, name);
+        File.WriteAllText(tmp, JsonSerializer.Serialize(report, WorkerOptions.JsonOpts));
+        File.Move(tmp, final);
+        _wake.Release();
+    }
+
+    public bool HasPending => Directory.EnumerateFiles(_dir, "*.json").Any();
+
+    /// <summary>Long-running replay loop; started once by the worker service.</summary>
+    public async Task RunAsync(CancellationToken ct)
+    {
+        var backoff = TimeSpan.FromSeconds(1);
+        while (!ct.IsCancellationRequested)
+        {
+            var next = Directory.EnumerateFiles(_dir, "*.json").OrderBy(f => f, StringComparer.Ordinal).FirstOrDefault();
+            if (next is null)
+            {
+                try { await _wake.WaitAsync(TimeSpan.FromSeconds(5), ct); } catch (OperationCanceledException) { break; }
+                continue;
+            }
+
+            bool done;
+            try
+            {
+                var report = JsonSerializer.Deserialize<SpooledReport>(File.ReadAllText(next), WorkerOptions.JsonOpts);
+                if (report is null || string.IsNullOrEmpty(report.JobId))
+                {
+                    _log.LogWarning("Discarding unreadable spool file {File}", next);
+                    done = true;
+                }
+                else
+                {
+                    done = await _api.SendLifecycleAsync(report.Kind, report.JobId, report.Payload, ct);
+                }
+            }
+            catch (OperationCanceledException)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                _log.LogWarning(ex, "Spool replay attempt failed for {File}", next);
+                done = false;
+            }
+
+            if (done)
+            {
+                try { File.Delete(next); } catch { /* re-sent next pass; server side is idempotent */ }
+                backoff = TimeSpan.FromSeconds(1);
+            }
+            else
+            {
+                try { await Task.Delay(backoff, ct); } catch (OperationCanceledException) { break; }
+                backoff = TimeSpan.FromSeconds(Math.Min(backoff.TotalSeconds * 2, 60));
+            }
+        }
+    }
+}

RenderWorker/VFXReviewWorker/VFXReviewWorker.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>VFXReviewWorker</RootNamespace>
+    <AssemblyName>VFXReviewWorker</AssemblyName>
+    <!-- Single self-contained exe for render nodes: dotnet publish -r win-x64 (see README) -->
+    <InvariantGlobalization>true</InvariantGlobalization>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="8.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <InternalsVisibleTo Include="VFXReviewWorker.Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!-- Headless AE build script ships beside the exe -->
+    <Content Include="..\scripts\vfxr_build_preview.jsx" Link="scripts\vfxr_build_preview.jsx">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>

RenderWorker/VFXReviewWorker/WorkerOptions.cs

@@ -0,0 +1,79 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Machine-local config (RenderPipeline2 §7.8) — deliberately minimal;
+/// everything tunable lives in server SystemConfig and arrives via E6.
+/// Default path: C:\ProgramData\VFXReviewWorker\config.json
+/// </summary>
+public sealed class WorkerOptions
+{
+    public string ServerUrl { get; set; } = "";
+    public string ApiKey { get; set; } = "";
+    public string MachineName { get; set; } = Environment.MachineName;
+    public string AerenderPath { get; set; } = @"C:\Program Files\Adobe\Adobe After Effects 2026\Support Files\aerender.exe";
+    /// <summary>AfterFX.com — the console AE used for the headless preview build. Defaults beside aerender.</summary>
+    public string? AfterFxPath { get; set; }
+    /// <summary>vfxr_build_preview.jsx — defaults to scripts\ beside the worker exe.</summary>
+    public string? PreviewScriptPath { get; set; }
+    public string? FfmpegPath { get; set; }
+    public string? OiiotoolPath { get; set; }
+    public List<PathMapping> PathMappings { get; set; } = new();
+    public string WorkerVersion { get; set; } = "1.0.0";
+    public string? AeVersion { get; set; }
+
+    public static string DataDir =>
+        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "VFXReviewWorker");
+
+    public static string DefaultConfigPath => Path.Combine(DataDir, "config.json");
+    public static string LogsDir => Path.Combine(DataDir, "logs");
+    public static string SpoolDir => Path.Combine(DataDir, "spool");
+    public static string ScratchDir => Path.Combine(DataDir, "scratch");
+    public static string StateFilePath => Path.Combine(DataDir, "current-job.json");
+
+    /// <summary>AfterFX.com sits beside aerender.exe in a standard AE install.</summary>
+    public string ResolveAfterFxPath()
+    {
+        if (!string.IsNullOrWhiteSpace(AfterFxPath)) return AfterFxPath;
+        var dir = Path.GetDirectoryName(AerenderPath);
+        return dir is null ? "AfterFX.com" : Path.Combine(dir, "AfterFX.com");
+    }
+
+    public string ResolvePreviewScriptPath()
+    {
+        if (!string.IsNullOrWhiteSpace(PreviewScriptPath)) return PreviewScriptPath;
+        return Path.Combine(AppContext.BaseDirectory, "scripts", "vfxr_build_preview.jsx");
+    }
+
+    public static WorkerOptions Load(string? path = null)
+    {
+        path ??= DefaultConfigPath;
+        if (!File.Exists(path))
+        {
+            throw new FileNotFoundException(
+                $"Worker config not found at {path}. Create it with serverUrl, apiKey and machineName (see RenderWorker/README.md).");
+        }
+        var json = File.ReadAllText(path);
+        var opts = JsonSerializer.Deserialize<WorkerOptions>(json, JsonOpts)
+                   ?? throw new InvalidOperationException($"Could not parse {path}");
+        if (string.IsNullOrWhiteSpace(opts.ServerUrl)) throw new InvalidOperationException("config.json: serverUrl is required");
+        if (string.IsNullOrWhiteSpace(opts.ApiKey)) throw new InvalidOperationException("config.json: apiKey is required");
+        if (string.IsNullOrWhiteSpace(opts.MachineName)) opts.MachineName = Environment.MachineName;
+        return opts;
+    }
+
+    public static readonly JsonSerializerOptions JsonOpts = new()
+    {
+        PropertyNameCaseInsensitive = true,
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+    };
+}
+
+public sealed class PathMapping
+{
+    public string From { get; set; } = "";
+    public string To { get; set; } = "";
+}

RenderWorker/VFXReviewWorker/WorkerService.cs

@@ -0,0 +1,159 @@
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace VFXReviewWorker;
+
+/// <summary>
+/// Main loop (§7.2): register on startup, heartbeat on its own timer (the
+/// cancel-signal channel), claim-poll only when idle, one job at a time.
+/// Workers poll dumbly — all scheduling policy (render windows, Render Now,
+/// urgent priority) lives server-side in the claim endpoint (§7.10).
+/// </summary>
+public sealed class WorkerService : BackgroundService
+{
+    private readonly WorkerOptions _options;
+    private readonly ApiClient _api;
+    private readonly JobExecutor _executor;
+    private readonly ReportSpooler _spooler;
+    private readonly ILogger<WorkerService> _log;
+
+    private string? _machineId;
+    private ServerConfig _config = new();
+    private volatile string? _currentJobId;
+    private CancellationTokenSource? _cancelCurrentJob;
+    private bool? _lastAeOpen;
+
+    public WorkerService(WorkerOptions options, ApiClient api, JobExecutor executor, ReportSpooler spooler, ILogger<WorkerService> log)
+    {
+        _options = options;
+        _api = api;
+        _executor = executor;
+        _spooler = spooler;
+        _log = log;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        _log.LogInformation("VFXReview RenderWorker {Version} starting as \"{Name}\" → {Server}",
+            _options.WorkerVersion, _options.MachineName, _options.ServerUrl);
+
+        _ = Task.Run(() => _spooler.RunAsync(stoppingToken), stoppingToken);
+
+        await RegisterWithRetryAsync(stoppingToken);
+        await _executor.ReconcileAsync(_machineId!, stoppingToken);
+
+        _ = Task.Run(() => HeartbeatLoopAsync(stoppingToken), stoppingToken);
+
+        // Claim loop — only while idle
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                // Preview builds drive a full AE instance, which would hijack an
+                // artist's open session (§9.1). Simply don't ask for those jobs
+                // while AE is running — they stay queued for a quiet moment
+                // instead of being claimed and failed.
+                var aeOpen = AeSession.InteractiveRunning();
+                if (aeOpen != _lastAeOpen)
+                {
+                    _log.LogInformation(aeOpen
+                        ? "Interactive After Effects detected — not claiming preview jobs until it closes"
+                        : "No interactive After Effects — preview jobs enabled");
+                    _lastAeOpen = aeOpen;
+                }
+                var types = aeOpen
+                    ? new[] { "AE_RENDER" }
+                    : new[] { "AE_RENDER", "PREVIEW_ONLY" };
+
+                var job = await _api.ClaimAsync(_machineId!, types, stoppingToken);
+                if (job is not null)
+                {
+                    _log.LogInformation("Claimed job {JobId} (attempt {Attempt}/{Max}, export {ExportId})",
+                        job.Id, job.Attempt, job.MaxAttempts, job.ExportId);
+                    _cancelCurrentJob = CancellationTokenSource.CreateLinkedTokenSource(CancellationToken.None);
+                    _currentJobId = job.Id;
+                    try
+                    {
+                        await _executor.RunAsync(job, _machineId!, _config, _cancelCurrentJob.Token, stoppingToken);
+                    }
+                    finally
+                    {
+                        _currentJobId = null;
+                        _cancelCurrentJob.Dispose();
+                        _cancelCurrentJob = null;
+                    }
+                    continue; // immediately look for the next job
+                }
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                _log.LogWarning(ex, "Claim poll failed (server unreachable?) — retrying on normal cadence");
+            }
+            try { await Task.Delay(TimeSpan.FromSeconds(_config.PollSeconds), stoppingToken); }
+            catch (OperationCanceledException) { break; }
+        }
+        _log.LogInformation("RenderWorker stopping");
+    }
+
+    private async Task RegisterWithRetryAsync(CancellationToken ct)
+    {
+        var backoff = TimeSpan.FromSeconds(1);
+        while (!ct.IsCancellationRequested)
+        {
+            try
+            {
+                var reg = await _api.RegisterAsync(_options, ct);
+                _machineId = reg.Machine.Id;
+                _config = reg.Config;
+                _log.LogInformation(
+                    "Registered as machine {Id} ({Name}); poll={Poll}s heartbeat={Hb}s lease={Lease}s stall={Stall}s enabled={Enabled}",
+                    reg.Machine.Id, reg.Machine.Name, _config.PollSeconds, _config.HeartbeatSeconds,
+                    _config.LeaseSeconds, _config.StallTimeoutSeconds, reg.Machine.Enabled);
+                return;
+            }
+            catch (OperationCanceledException) when (ct.IsCancellationRequested)
+            {
+                return;
+            }
+            catch (Exception ex)
+            {
+                _log.LogWarning("Registration failed ({Error}); retrying in {Backoff}s", ex.Message, backoff.TotalSeconds);
+                try { await Task.Delay(backoff, ct); } catch (OperationCanceledException) { return; }
+                backoff = TimeSpan.FromSeconds(Math.Min(backoff.TotalSeconds * 2, 60));
+            }
+        }
+    }
+
+    private async Task HeartbeatLoopAsync(CancellationToken ct)
+    {
+        while (!ct.IsCancellationRequested)
+        {
+            try
+            {
+                var resp = await _api.HeartbeatAsync(_machineId!, _currentJobId, ct);
+                foreach (var cmd in resp.Commands)
+                {
+                    if (cmd.Type == "CANCEL_JOB" && cmd.JobId is not null && cmd.JobId == _currentJobId)
+                    {
+                        _log.LogWarning("Heartbeat carried CANCEL_JOB for current job {JobId}", cmd.JobId);
+                        _cancelCurrentJob?.Cancel();
+                    }
+                }
+            }
+            catch (OperationCanceledException) when (ct.IsCancellationRequested)
+            {
+                return;
+            }
+            catch (Exception ex)
+            {
+                _log.LogDebug(ex, "Heartbeat failed (non-fatal)");
+            }
+            try { await Task.Delay(TimeSpan.FromSeconds(_config.HeartbeatSeconds), ct); }
+            catch (OperationCanceledException) { return; }
+        }
+    }
+}

RenderWorker/scripts/test-preview-build.ps1

@@ -0,0 +1,138 @@
+<#
+.SYNOPSIS
+    Headless AE spike / debug tool for the preview build stage.
+
+.DESCRIPTION
+    Runs vfxr_build_preview.jsx exactly the way the RenderWorker does, but
+    standalone, so the risky part (AfterFX.com -noui -r under a service
+    account) can be proven before wiring the whole pipeline together.
+
+    It does NOT render - it builds the preview comp, queues the MOV + MP4
+    output modules and saves a temp AEP, then prints the build result.
+
+    IMPORTANT: close After Effects first. `AfterFX.com -r` hands the script to
+    an already-running instance, which would open the template in your session
+    and then quit it.
+
+.EXAMPLE
+    .\test-preview-build.ps1 -ExrDir "V:\_EXPORTS\UNG\renders\UNG_S1\111\UNG_111_001_030\v002" `
+                             -ShotCode "UNG_111_001_030" -Version "v002"
+
+.EXAMPLE
+    # then render what it built, exactly as the worker would:
+    & "C:\Program Files\Adobe\Adobe After Effects 2026\Support Files\aerender.exe" -project "$env:ProgramData\VFXReviewWorker\scratch\spike_preview.aep"
+#>
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory = $true)][string]$ExrDir,
+    [Parameter(Mandatory = $true)][string]$ShotCode,
+    [string]$Version = "v001",
+    [string]$TemplateAep = "X:/shared_projects_2026/UNGO_VFX/production/working_files/UNG_VFXOVERLAY_SLATE_TEMPLATE.aep",
+    [string]$TemplateComp = "UNG_EXPORT_TEMPLATE",
+    [string]$OverlayComp = "UNG_VFX_OVERLAY",
+    [string]$LutComp = "_SHOW LUT",
+    [string]$MovTemplate = "4444 Tri",
+    [string]$Mp4Template = "REVIEW_PREVIEW",
+    [string]$AfterFx = "C:\Program Files\Adobe\Adobe After Effects 2026\Support Files\AfterFX.com",
+    [int]$FrameStart = 1001,
+    [double]$Fps = 24,
+    [int]$TimeoutSeconds = 300
+)
+
+$ErrorActionPreference = "Stop"
+
+$running = Get-Process AfterFX -ErrorAction SilentlyContinue
+if ($running) {
+    Write-Warning "After Effects is running (PID $($running.Id -join ', '))."
+    Write-Warning "AfterFX.com -r would target that instance and quit it. Close AE first."
+    return
+}
+
+$scratch = Join-Path $env:ProgramData "VFXReviewWorker\scratch"
+if (-not (Test-Path $scratch)) { New-Item -ItemType Directory -Force -Path $scratch | Out-Null }
+
+$scriptPath = Join-Path $PSScriptRoot "vfxr_build_preview.jsx"
+if (-not (Test-Path $scriptPath)) { throw "Build script not found: $scriptPath" }
+if (-not (Test-Path $AfterFx))    { throw "AfterFX.com not found: $AfterFx" }
+if (-not (Test-Path $ExrDir))     { throw "EXR folder not found: $ExrDir" }
+
+$contextPath = Join-Path $scratch "spike_context.json"
+$resultPath  = Join-Path $scratch "spike_result.json"
+$wrapperPath = Join-Path $scratch "spike_run.jsx"
+$tempAep     = Join-Path $scratch "spike_preview.aep"
+$base        = "${ShotCode}_cmp_TT_${Version}"
+
+Remove-Item $resultPath -ErrorAction SilentlyContinue
+
+$context = [ordered]@{
+    jobId          = "spike"
+    exportId       = "spike"
+    shotCode       = $ShotCode
+    versionString  = $Version
+    outputDirLocal = $ExrDir
+    templateAep    = $TemplateAep
+    templateComp   = $TemplateComp
+    overlayComp    = $OverlayComp
+    lutComp        = $LutComp
+    movTemplate    = $MovTemplate
+    mp4Template    = $Mp4Template
+    movOutput      = (Join-Path $ExrDir "$base.mov")
+    mp4Output      = (Join-Path $ExrDir "$base.mp4")
+    tempAep        = $tempAep
+    resultPath     = $resultPath
+    frameStart     = $FrameStart
+    fps            = $Fps
+    slate          = [ordered]@{
+        versionName = $base
+        date        = (Get-Date -Format "yyyy/MM/dd")
+        description = "Spike test"
+        notes       = ""
+        shotCode    = $ShotCode
+        episode     = ""
+        scene       = ""
+    }
+}
+$context | ConvertTo-Json -Depth 6 | Out-File -FilePath $contextPath -Encoding utf8
+
+$ctxJs    = ($contextPath -replace '\\', '/') | ConvertTo-Json
+$scriptJs = ($scriptPath  -replace '\\', '/') | ConvertTo-Json
+$wrapper  = @(
+    "// generated by test-preview-build.ps1",
+    ("var VFXR_CONTEXT_PATH = {0};" -f $ctxJs),
+    ('$.evalFile({0});' -f $scriptJs)
+) -join "`r`n"
+$wrapper | Out-File -FilePath $wrapperPath -Encoding utf8
+
+Write-Host "Launching headless AE build..." -ForegroundColor Cyan
+$proc = Start-Process -FilePath $AfterFx -ArgumentList @("-noui", "-r", $wrapperPath) -PassThru -NoNewWindow
+if (-not $proc.WaitForExit($TimeoutSeconds * 1000)) {
+    Write-Warning "Timed out after $TimeoutSeconds s - killing AE."
+    try { $proc.Kill($true) } catch {}
+}
+
+if (-not (Test-Path $resultPath)) {
+    Write-Host "FAILED: no result file produced." -ForegroundColor Red
+    Write-Host "AE could not run the script headlessly under this account. See RenderWorker/README.md fallbacks." -ForegroundColor Red
+    return
+}
+
+$result = Get-Content $resultPath -Raw | ConvertFrom-Json
+if ($result.ok) {
+    Write-Host "BUILD OK" -ForegroundColor Green
+    Write-Host "  temp AEP    : $($result.tempAep)"
+    Write-Host "  preview comp: $($result.previewComp)"
+    Write-Host ("  frames      : {0}  ({1} x {2})" -f $result.frameCount, $result.width, $result.height)
+    Write-Host ("  queued      : {0} output(s)" -f @($result.queued).Count)
+    foreach ($q in @($result.queued)) {
+        Write-Host ("     - {0}: {1} -> {2}" -f $q.label, $q.template, $q.output)
+    }
+    Write-Host ""
+    Write-Host "Render it with:" -ForegroundColor Cyan
+    Write-Host ('  "{0}\aerender.exe" -project "{1}"' -f (Split-Path $AfterFx), $result.tempAep)
+} else {
+    Write-Host "BUILD FAILED: $($result.error)" -ForegroundColor Red
+}
+if ($result.warnings -and $result.warnings.Count -gt 0) {
+    Write-Host "Warnings:" -ForegroundColor Yellow
+    $result.warnings | ForEach-Object { Write-Host "  - $_" -ForegroundColor Yellow }
+}

RenderWorker/scripts/vfxr_build_preview.jsx

@@ -0,0 +1,527 @@
+/*
+    vfxr_build_preview.jsx — VFXReview render pipeline, preview build stage.
+
+    Runs headlessly:  AfterFX.com -noui -r <wrapper>.jsx
+    where the wrapper sets  var VFXR_CONTEXT_PATH = "...json";  then
+    $.evalFile()s this script.
+
+    It does NOT render. It opens the studio slate/overlay template, rebuilds
+    the shot around the *rendered* EXR sequence (OCIO → show LUT → overlay),
+    duplicates the export template into a preview comp with the slate filled
+    in, queues the MOV and MP4 output modules, and saves a throwaway AEP.
+    The worker then runs `aerender -project <that aep>` with no -comp, which
+    renders the whole queue in one launch.
+
+    Build logic mirrors the VFXReviewConnector panel functions
+    buildShotFromCode / updateOverlayForComp / buildPreviewForShot so the
+    farm and the artist produce identical slates and burn-ins.
+
+    Everything is reported back through the result JSON — never a dialog.
+*/
+
+(function vfxrBuildPreview() {
+    var ctx = null;
+    var result = {
+        ok: false,
+        error: null,
+        warnings: [],
+        tempAep: null,
+        previewComp: null,
+        queued: [],
+        frameCount: null,
+        width: null,
+        height: null
+    };
+    var resultPath = null;
+
+    // ── tiny helpers (ES3 / ExtendScript safe) ───────────────────────────────
+
+    function readTextFile(path) {
+        var f = new File(path);
+        var text;
+        if (!f.exists) {
+            return null;
+        }
+        f.encoding = "UTF-8";
+        if (!f.open("r")) {
+            return null;
+        }
+        text = f.read();
+        f.close();
+        return text;
+    }
+
+    function writeTextFile(path, text) {
+        var f = new File(path);
+        try {
+            f.encoding = "UTF-8";
+            if (!f.open("w")) {
+                return false;
+            }
+            f.write(text);
+            f.close();
+            return true;
+        } catch (writeError) {
+            return false;
+        }
+    }
+
+    function jsonEscape(value) {
+        var text = String(value);
+        var out = "";
+        var i;
+        var ch;
+        var code;
+
+        for (i = 0; i < text.length; i += 1) {
+            ch = text.charAt(i);
+            code = text.charCodeAt(i);
+            if (ch === "\"") {
+                out += "\\\"";
+            } else if (ch === "\\") {
+                out += "\\\\";
+            } else if (ch === "\n") {
+                out += "\\n";
+            } else if (ch === "\r") {
+                out += "\\r";
+            } else if (ch === "\t") {
+                out += "\\t";
+            } else if (code < 32) {
+                out += "\\u" + ("000" + code.toString(16)).slice(-4);
+            } else {
+                out += ch;
+            }
+        }
+        return out;
+    }
+
+    function toJSON(value) {
+        var parts = [];
+        var i;
+        var key;
+
+        if (value === null || value === undefined) {
+            return "null";
+        }
+        if (typeof value === "number") {
+            return isFinite(value) ? String(value) : "null";
+        }
+        if (typeof value === "boolean") {
+            return String(value);
+        }
+        if (typeof value === "string") {
+            return "\"" + jsonEscape(value) + "\"";
+        }
+        if (value instanceof Array) {
+            for (i = 0; i < value.length; i += 1) {
+                parts.push(toJSON(value[i]));
+            }
+            return "[" + parts.join(",") + "]";
+        }
+        for (key in value) {
+            if (value.hasOwnProperty(key) && value[key] !== undefined) {
+                parts.push("\"" + jsonEscape(key) + "\":" + toJSON(value[key]));
+            }
+        }
+        return "{" + parts.join(",") + "}";
+    }
+
+    function warn(message) {
+        result.warnings.push(String(message));
+    }
+
+    function findComp(name) {
+        var i;
+        var item;
+
+        for (i = 1; i <= app.project.numItems; i += 1) {
+            item = app.project.item(i);
+            if (item instanceof CompItem && item.name === name) {
+                return item;
+            }
+        }
+        return null;
+    }
+
+    function findFolder(name) {
+        var i;
+        var item;
+
+        for (i = 1; i <= app.project.numItems; i += 1) {
+            item = app.project.item(i);
+            if (item instanceof FolderItem && item.name === name) {
+                return item;
+            }
+        }
+        return null;
+    }
+
+    // Mirrors the panel's addOCIOToLayer: effect added but disabled, so the
+    // artist/farm chain matches exactly.
+    function addOCIOToLayer(layer) {
+        var ocio;
+        var outputProp;
+
+        try {
+            ocio = layer.property("Effects").addProperty("OCIO Color Space Transform");
+            ocio.enabled = false;
+        } catch (ocioError) {
+            warn("OCIO effect unavailable: " + ocioError.toString());
+            return;
+        }
+
+        try {
+            outputProp = ocio.property("Output Color Space");
+        } catch (byNameError) {
+            outputProp = null;
+        }
+        if (!outputProp) {
+            try {
+                outputProp = ocio.property(2);
+            } catch (byIndexError) {
+                outputProp = null;
+            }
+        }
+        if (outputProp) {
+            try {
+                outputProp.setValue(93);
+            } catch (setError) {
+                warn("Could not set OCIO output colour space: " + setError.toString());
+            }
+        }
+    }
+
+    function setEssentialProperty(layer, propName, value) {
+        if (value === null || value === undefined || value === "") {
+            return false;
+        }
+        try {
+            layer.property("Essential Properties").property(propName).setValue(value);
+            return true;
+        } catch (setError) {
+            return false;
+        }
+    }
+
+    function setEssentialPropertyByIndex(layer, index, value) {
+        try {
+            layer.property("Essential Properties").property(index).setValue(value);
+            return true;
+        } catch (setError) {
+            return false;
+        }
+    }
+
+    function listEssentialPropertyNames(layer) {
+        var names = [];
+        var group;
+        var i;
+
+        try {
+            group = layer.property("Essential Properties");
+            for (i = 1; i <= group.numProperties; i += 1) {
+                try {
+                    names.push(i + ":" + group.property(i).name);
+                } catch (oneError) {
+                }
+            }
+        } catch (groupError) {
+        }
+        return names;
+    }
+
+    // Per-submission fields (VFX Scope / Submission Note). The property names
+    // come from config; if one does not exist, report the template's actual
+    // property names so it can be corrected without another build.
+    function setSlateField(layer, propName, value, label) {
+        if (!propName) {
+            return;
+        }
+        if (value === null || value === undefined || value === "") {
+            return; // nothing to write; leave the template's own default
+        }
+        if (!setEssentialProperty(layer, propName, value)) {
+            warn(label + ": Essential Property \"" + propName + "\" not found or not settable. " +
+                "Available: " + listEssentialPropertyNames(layer).join(", "));
+        }
+    }
+
+    function setCompStartFrame(comp, frameNumber) {
+        try {
+            comp.displayStartFrame = frameNumber;
+            return;
+        } catch (frameError) {
+        }
+        try {
+            comp.displayStartTime = frameNumber / comp.frameRate;
+        } catch (timeError) {
+        }
+    }
+
+    function applyOutputModuleTemplate(outputModule, templateName) {
+        var templates;
+        var i;
+
+        try {
+            templates = outputModule.templates;
+            for (i = 0; i < templates.length; i += 1) {
+                if (templates[i] === templateName) {
+                    outputModule.applyTemplate(templateName);
+                    return true;
+                }
+            }
+        } catch (templateError) {
+        }
+        return false;
+    }
+
+    function importExrSequence(dirPath) {
+        var folder = new Folder(dirPath);
+        var files;
+        var importOptions;
+        var footage;
+
+        if (!folder.exists) {
+            throw new Error("Render output folder not found: " + dirPath);
+        }
+
+        files = folder.getFiles("*.exr");
+        if (!files || files.length < 1) {
+            throw new Error("No EXR files found in " + dirPath);
+        }
+        files.sort();
+
+        importOptions = new ImportOptions(files[0]);
+        importOptions.sequence = true;
+        footage = app.project.importFile(importOptions);
+        try {
+            footage.mainSource.conformFrameRate = ctx.fps || 24;
+        } catch (conformError) {
+            warn("Could not conform frame rate: " + conformError.toString());
+        }
+        return footage;
+    }
+
+    function queueOutput(comp, templateName, outputPath, label) {
+        var item;
+        var outputModule;
+
+        if (!templateName || !outputPath) {
+            warn("Skipping " + label + ": no template or output path configured");
+            return false;
+        }
+
+        try {
+            item = app.project.renderQueue.items.add(comp);
+            outputModule = item.outputModule(1);
+            if (!applyOutputModuleTemplate(outputModule, templateName)) {
+                item.remove();
+                throw new Error("Output module template not found: \"" + templateName + "\"");
+            }
+            outputModule.file = new File(outputPath);
+            result.queued.push({ label: label, template: templateName, output: outputPath });
+            return true;
+        } catch (queueError) {
+            try {
+                if (item) {
+                    item.remove();
+                }
+            } catch (removeError) {
+            }
+            throw queueError;
+        }
+    }
+
+    // ── main ─────────────────────────────────────────────────────────────────
+
+    try {
+        if (typeof VFXR_CONTEXT_PATH === "undefined" || !VFXR_CONTEXT_PATH) {
+            throw new Error("VFXR_CONTEXT_PATH was not set by the wrapper script");
+        }
+
+        var contextText = readTextFile(VFXR_CONTEXT_PATH);
+        if (!contextText) {
+            throw new Error("Could not read job context: " + VFXR_CONTEXT_PATH);
+        }
+        ctx = eval("(" + contextText + ")");
+        resultPath = ctx.resultPath;
+
+        try {
+            app.beginSuppressDialogs();
+        } catch (suppressError) {
+        }
+
+        // 1. Open the studio template (slate, overlay, show LUT, export template)
+        var templateFile = new File(ctx.templateAep);
+        if (!templateFile.exists) {
+            throw new Error("Template project not found: " + ctx.templateAep);
+        }
+        app.open(templateFile);
+
+        var templateComp = findComp(ctx.templateComp);
+        if (!templateComp) {
+            throw new Error("Export template comp \"" + ctx.templateComp + "\" not found in template project");
+        }
+
+        // 2. Import the rendered EXR sequence
+        var footage = importExrSequence(ctx.outputDirLocal);
+        var footageFolder = findFolder("_FOOTAGE_4K");
+        if (footageFolder) {
+            footage.parentFolder = footageFolder;
+        }
+        footage.name = ctx.shotCode + "_" + ctx.versionString;
+
+        var width = footage.width;
+        var height = footage.height;
+        var duration = footage.duration;
+        var fps = ctx.fps || 24;
+
+        result.width = width;
+        result.height = height;
+        result.frameCount = Math.round(duration * fps);
+
+        // 3. Footage precomp (mirrors buildShotFromCode)
+        var precompFolder = findFolder("_PRECOMPS");
+        var footageComp = app.project.items.addComp(
+            ctx.shotCode + "_FOOTAGE", width, height, 1, duration, fps);
+        if (precompFolder) {
+            footageComp.parentFolder = precompFolder;
+        }
+        if (ctx.frameStart !== null && ctx.frameStart !== undefined) {
+            setCompStartFrame(footageComp, ctx.frameStart);
+        }
+        addOCIOToLayer(footageComp.layers.add(footage));
+
+        // 4. Shot comp: footage + show LUT + overlay
+        var shotComp = app.project.items.addComp(ctx.shotCode, width, height, 1, duration, fps);
+        if (ctx.frameStart !== null && ctx.frameStart !== undefined) {
+            setCompStartFrame(shotComp, ctx.frameStart);
+        }
+        shotComp.layers.add(footageComp);
+
+        if (ctx.lutComp) {
+            var showLut = findComp(ctx.lutComp);
+            if (showLut) {
+                var lutLayer = shotComp.layers.add(showLut);
+                lutLayer.collapseTransformation = true;
+            } else {
+                warn("Show LUT comp \"" + ctx.lutComp + "\" not found — rendering without it");
+            }
+        }
+
+        if (ctx.overlayComp) {
+            var overlayComp = findComp(ctx.overlayComp);
+            if (overlayComp) {
+                var overlayLayer = shotComp.layers.add(overlayComp);
+                overlayLayer.moveToBeginning();
+                overlayLayer.enabled = true;
+                setEssentialProperty(overlayLayer, "DATE", ctx.slate.date);
+                setEssentialProperty(overlayLayer, "SHOT NAME", ctx.slate.versionName);
+            } else {
+                warn("Overlay comp \"" + ctx.overlayComp + "\" not found — rendering without burn-ins");
+            }
+        }
+
+        // 5. Preview comp from the export template (mirrors buildPreviewForShot)
+        var previewsFolder = findFolder("_PREVIEWS");
+        var previewComp = templateComp.duplicate();
+        previewComp.name = ctx.shotCode + "_PREVIEW";
+        if (previewsFolder) {
+            previewComp.parentFolder = previewsFolder;
+        }
+
+        previewComp.layer("SHOT").replaceSource(shotComp, false);
+        try {
+            previewComp.layer("THUMBNAIL").replaceSource(shotComp, false);
+        } catch (thumbError) {
+            warn("THUMBNAIL layer not updated: " + thumbError.toString());
+        }
+
+        var slateLayer = previewComp.layer("NETFLIX_SLATE");
+        if (slateLayer) {
+            // Index-addressed properties match the panel exactly (3 = version
+            // name, 10 = shot code); the rest are addressed by name.
+            setEssentialPropertyByIndex(slateLayer, 3, ctx.slate.versionName);
+            setEssentialProperty(slateLayer, "Date", ctx.slate.date);
+            setEssentialProperty(slateLayer, "Desc", ctx.slate.description);
+            setEssentialPropertyByIndex(slateLayer, 10, ctx.slate.shotCode);
+            setEssentialProperty(slateLayer, "Episode", ctx.slate.episode);
+            setEssentialProperty(slateLayer, "Scene", ctx.slate.scene);
+            setEssentialProperty(slateLayer, "Frames", result.frameCount);
+
+            setSlateField(slateLayer, ctx.slateScopeProp, ctx.slate.vfxScope, "VFX Scope");
+            // The slate's Notes field carries this submission's note; when the
+            // artist left it blank, fall back to the shot's own notes so the
+            // slate looks the same as an artist-built preview.
+            setSlateField(slateLayer, ctx.slateSubmissionProp,
+                (ctx.slate.submissionNote !== null &&
+                 ctx.slate.submissionNote !== undefined &&
+                 ctx.slate.submissionNote !== "")
+                    ? ctx.slate.submissionNote
+                    : ctx.slate.notes,
+                "Submission Note");
+        } else {
+            warn("NETFLIX_SLATE layer not found in template — slate fields not filled");
+        }
+
+        var shotLayer = previewComp.layer("SHOT");
+        var targetOutPoint = shotLayer.inPoint + shotComp.duration;
+        if (targetOutPoint > previewComp.duration) {
+            previewComp.duration = targetOutPoint;
+        }
+        shotLayer.outPoint = targetOutPoint;
+        previewComp.duration = targetOutPoint;
+
+        result.previewComp = previewComp.name;
+
+        // 6. Queue both outputs against the same preview comp. aerender will
+        //    render the whole queue in one launch.
+        app.project.renderQueue.showWindow(false);
+        while (app.project.renderQueue.numItems > 0) {
+            app.project.renderQueue.item(1).remove();
+        }
+        queueOutput(previewComp, ctx.movTemplate, ctx.movOutput, "mov");
+        queueOutput(previewComp, ctx.mp4Template, ctx.mp4Output, "mp4");
+
+        if (result.queued.length < 1) {
+            throw new Error("Nothing was queued — check output module templates");
+        }
+
+        // 7. Save the throwaway project the worker will hand to aerender
+        var tempFile = new File(ctx.tempAep);
+        var tempParent = tempFile.parent;
+        if (tempParent && !tempParent.exists) {
+            tempParent.create();
+        }
+        app.project.save(tempFile);
+        result.tempAep = ctx.tempAep;
+        result.ok = true;
+    } catch (buildError) {
+        result.ok = false;
+        result.error = buildError && buildError.toString ? buildError.toString() : String(buildError);
+        try {
+            if (buildError && buildError.line) {
+                result.error += " (line " + buildError.line + ")";
+            }
+        } catch (lineError) {
+        }
+    }
+
+    try {
+        app.endSuppressDialogs(false);
+    } catch (endSuppressError) {
+    }
+
+    if (!resultPath && ctx && ctx.resultPath) {
+        resultPath = ctx.resultPath;
+    }
+    if (resultPath) {
+        writeTextFile(resultPath, toJSON(result));
+    }
+
+    // -noui leaves the app running otherwise; the worker waits on exit.
+    try {
+        app.quit();
+    } catch (quitError) {
+    }
+}());

TECHNICAL_ARCHITECTURE_REPORT_CURRENT_STATE.md

@@ -0,0 +1,753 @@
+# Technical Architecture Report (Current State)
+
+Date: 2026-07-31  
+Scope: Current implementation only (no redesign suggestions)
+
+---
+
+## 1. Database
+
+Authoritative schema source: [prisma/schema.prisma](prisma/schema.prisma)
+
+### Full Prisma Schema
+The full schema is defined in [prisma/schema.prisma](prisma/schema.prisma).
+
+### Models related to requested domains
+
+- Users/Auth
+  - User
+  - Account
+  - Session
+  - VerificationToken
+  - ClientAccess
+- Projects/Episodes
+  - Project
+  - EpisodeDueDate
+  - Client
+- Shots/Tasks/Versions/Reviews
+  - Shot
+  - ShotGroup
+  - Task
+  - Version
+  - Comment
+  - CommentReply
+  - Annotation
+  - Approval
+  - ReviewSession
+- Files/Storage
+  - FootagePlate
+  - ShotReference
+  - SystemConfig
+- Delivery/Export adjacent
+  - Shot fields: highResKey, highResFilename, exrOutput, shotVersion
+  - Version fields: fileUrl, fileName, proxyUrl, thumbnailUrl, posterUrl
+
+### Relationship summary
+
+- Client 1:N Project
+- Project 1:N Shot
+- Project 1:N Task
+- Project 1:N ReviewSession
+- Project 1:N EpisodeDueDate
+- Shot 1:N Task
+- Shot 1:N Version
+- Shot 1:N FootagePlate
+- Shot 1:N ShotReference
+- Task 1:N Version
+- Version 1:N Comment
+- Version 1:N Annotation
+- Version 1:N Approval
+- Comment 1:N CommentReply
+- User has many assigned/created entities across shots, tasks, versions, comments, approvals
+
+### Existing status enums
+
+From [prisma/schema.prisma](prisma/schema.prisma):
+
+- ProjectStatus: ACTIVE, ON_HOLD, COMPLETED, ARCHIVED
+- ShotStatus: WAITING, IN_PROGRESS, INTERNAL_REVIEW, READY_FOR_CLIENT, CLIENT_REVIEW, REVISIONS, COMPLETE
+- ShotApprovalStatus: PENDING, INTERNALLY_APPROVED, CLIENT_APPROVED
+- TaskStatus: TODO, IN_PROGRESS, INTERNAL_REVIEW, CLIENT_REVIEW, CHANGES, DONE
+- ApprovalStatus: PENDING_REVIEW, APPROVED, REJECTED, NEEDS_CHANGES
+- ReviewStatus: PENDING, INTERNAL_APPROVED, CLIENT_APPROVED, NEEDS_CHANGES, FINAL_APPROVED
+
+Notes:
+- There is no dedicated Delivery model.
+- There is no dedicated Export model.
+- Delivery/export state is represented by file pointers and shot/version metadata fields.
+
+---
+
+## 2. API
+
+### 2.1 Shots
+
+#### External shot APIs
+
+- GET /api/ext/projects
+  - URL: /api/ext/projects
+  - Method: GET
+  - Purpose: List projects for pipeline tools
+  - Request body: None
+  - Response: projects[] with id, name, code, showId, projectType, status, dates, _count
+  - Source: [app/api/ext/projects/route.ts](app/api/ext/projects/route.ts)
+
+- GET /api/ext/projects/{projectCode}/episodes
+  - URL: /api/ext/projects/{projectCode}/episodes
+  - Method: GET
+  - Purpose: List distinct episodes and optionally shot payloads per episode
+  - Request body: None
+  - Response: project + episodes[]; optional shots[] includes exrOutput/timecodes
+  - Source: [app/api/ext/projects/[projectCode]/episodes/route.ts](app/api/ext/projects/%5BprojectCode%5D/episodes/route.ts)
+
+- GET /api/ext/projects/{projectCode}/shots
+  - URL: /api/ext/projects/{projectCode}/shots
+  - Method: GET
+  - Purpose: List shots by project code with filters/pagination
+  - Request body: None
+  - Response: project + pagination + shots[]
+  - Source: [app/api/ext/projects/[projectCode]/shots/route.ts](app/api/ext/projects/%5BprojectCode%5D/shots/route.ts)
+
+- GET /api/ext/shots
+  - URL: /api/ext/shots
+  - Method: GET
+  - Purpose: Legacy listing by projectId
+  - Request body: None
+  - Response: shots[] + total
+  - Source: [app/api/ext/shots/route.ts](app/api/ext/shots/route.ts)
+
+- POST /api/ext/shots
+  - URL: /api/ext/shots
+  - Method: POST
+  - Purpose: Create shot from external tool (JSON or multipart thumbnail)
+  - Request body:
+    - projectId, scene
+    - optional episode, description, artistId, priority, fps, frameStart, frameEnd, dueDate, thumbnailUrl, shotGroupName, shotCode
+    - optional thumbnail file (multipart)
+  - Response: created shot object
+  - Source: [app/api/ext/shots/route.ts](app/api/ext/shots/route.ts)
+
+- GET /api/ext/shots/lookup
+  - URL: /api/ext/shots/lookup
+  - Method: GET
+  - Purpose: Canonical shot lookup by shotCode (+ optional projectCode)
+  - Request body: None
+  - Response: shot object with project, artist, tasks, latest version, exrOutput, shotVersion, source/seq timecodes
+  - Source: [app/api/ext/shots/lookup/route.ts](app/api/ext/shots/lookup/route.ts)
+
+- GET /api/ext/shots/{shotId}
+  - URL: /api/ext/shots/{shotId}
+  - Method: GET
+  - Purpose: Shot detail by DB id, or byCode mode
+  - Request body: None
+  - Response: full shot detail with tasks/latest version/counts
+  - Source: [app/api/ext/shots/[shotId]/route.ts](app/api/ext/shots/%5BshotId%5D/route.ts)
+
+- PATCH /api/ext/shots/{shotId}
+  - URL: /api/ext/shots/{shotId}
+  - Method: PATCH
+  - Purpose: Update mutable shot field(s) from pipeline tools
+  - Request body: shotVersion (v###) currently supported
+  - Response: success + updated shot id/shotVersion
+  - Source: [app/api/ext/shots/[shotId]/route.ts](app/api/ext/shots/%5BshotId%5D/route.ts)
+
+#### Internal shot APIs
+
+- GET /api/shots/{shotId}
+  - URL: /api/shots/{shotId}
+  - Method: GET
+  - Purpose: Internal dashboard shot detail payload
+  - Request body: None
+  - Response: shot + tasks + artists + permissions flags
+  - Source: [app/api/shots/[shotId]/route.ts](app/api/shots/%5BshotId%5D/route.ts)
+
+- GET /api/projects/{projectId}/episodes
+  - URL: /api/projects/{projectId}/episodes
+  - Method: GET
+  - Purpose: Internal distinct episode list for project
+  - Request body: None
+  - Response: episodes[]
+  - Source: [app/api/projects/[projectId]/episodes/route.ts](app/api/projects/%5BprojectId%5D/episodes/route.ts)
+
+### 2.2 Reviews
+
+- GET /api/review-sessions
+  - Purpose: list review sessions
+- POST /api/review-sessions
+  - Purpose: create review session token and portal link
+- DELETE /api/review-sessions
+  - Purpose: deactivate review session
+- Source: [app/api/review-sessions/route.ts](app/api/review-sessions/route.ts)
+
+- POST /api/client/{token}/auth
+  - Purpose: review password check + unlock cookie
+  - Source: [app/api/client/[token]/auth/route.ts](app/api/client/%5Btoken%5D/auth/route.ts)
+
+- GET /api/client/{token}/project
+  - Purpose: client portal project payload (shared shots/versions)
+  - Source: [app/api/client/[token]/project/route.ts](app/api/client/%5Btoken%5D/project/route.ts)
+
+- GET /api/client/{token}/versions/{versionId}
+  - Purpose: client review detail payload
+  - Source: [app/api/client/[token]/versions/[versionId]/route.ts](app/api/client/%5Btoken%5D/versions/%5BversionId%5D/route.ts)
+
+- POST /api/client/{token}/comment
+  - Purpose: client frame comment
+  - Request body: versionId, frameNumber, timestamp, text
+  - Response: created comment
+  - Source: [app/api/client/[token]/comment/route.ts](app/api/client/%5Btoken%5D/comment/route.ts)
+
+- POST /api/client/{token}/annotation
+  - Purpose: client annotation write
+  - Request body: versionId, frameNumber, drawingData, optional color
+  - Response: annotation
+  - Source: [app/api/client/[token]/annotation/route.ts](app/api/client/%5Btoken%5D/annotation/route.ts)
+
+- POST /api/client/{token}/approve
+  - Purpose: shot-level approve/changes and legacy version-level approval
+  - Request body:
+    - shot mode: shotId + action
+    - version mode: versionId + status + notes
+  - Response: success
+  - Source: [app/api/client/[token]/approve/route.ts](app/api/client/%5Btoken%5D/approve/route.ts)
+
+- GET /api/versions/{versionId}/comments
+  - Purpose: internal comments read
+  - Source: [app/api/versions/[versionId]/comments/route.ts](app/api/versions/%5BversionId%5D/comments/route.ts)
+
+- GET /api/versions/{versionId}/annotations
+  - Purpose: internal annotations read
+  - Source: [app/api/versions/[versionId]/annotations/route.ts](app/api/versions/%5BversionId%5D/annotations/route.ts)
+
+- GET /api/playlist
+  - Purpose: latest version per shot playlist
+  - Source: [app/api/playlist/route.ts](app/api/playlist/route.ts)
+
+### 2.3 File uploads
+
+- POST /api/upload
+  - Purpose: authenticated upload to Hetzner via app server
+  - Body: multipart file (+ type)
+  - Response: url, key
+  - Source: [app/api/upload/route.ts](app/api/upload/route.ts)
+
+- POST /api/upload/local
+  - Purpose: authenticated video upload path
+  - Body: multipart file
+  - Response: url, key
+  - Source: [app/api/upload/local/route.ts](app/api/upload/local/route.ts)
+
+- POST /api/upload/presign
+  - Purpose: direct browser->object-storage upload URL
+  - Body: fileName, contentType, optional folder
+  - Response: presignedUrl, key, url
+  - Source: [app/api/upload/presign/route.ts](app/api/upload/presign/route.ts)
+
+- GET/POST /api/uploadthing
+  - Purpose: UploadThing route handler passthrough (if configured)
+  - Source: [app/api/uploadthing/route.ts](app/api/uploadthing/route.ts)
+
+- POST /api/batch-upload/presign
+  - Purpose: presign high-res upload key
+  - Body: fileName
+  - Response: presignedUrl, key
+  - Source: [app/api/batch-upload/presign/route.ts](app/api/batch-upload/presign/route.ts)
+
+- POST /api/batch-upload/preview
+  - Purpose: classify upload actions before upload
+  - Body: projectId, fileNames[]
+  - Response: items[] with statuses (new-version, rename-and-upload, create-task, update-highres, etc)
+  - Source: [app/api/batch-upload/preview/route.ts](app/api/batch-upload/preview/route.ts)
+
+- POST /api/batch-upload/upload
+  - Purpose: commit highres key or create version records
+  - Body:
+    - update-highres: action, shotId, projectId, key, fileName
+    - version upload: action, shotId, projectId, file, task routing fields
+  - Response: success + action result
+  - Source: [app/api/batch-upload/upload/route.ts](app/api/batch-upload/upload/route.ts)
+
+### 2.4 EXRs / Rendering / Delivery / Storage / Metadata
+
+- GET /api/files/{...key}
+  - Purpose: file serving, range requests, local/Hetzner routing
+  - Source: [app/api/files/[...key]/route.ts](app/api/files/%5B...key%5D/route.ts)
+
+- GET/POST /api/admin/migration
+  - Purpose: local uploads migration status and per-key migration to Hetzner
+  - Source: [app/api/admin/migration/route.ts](app/api/admin/migration/route.ts)
+
+- POST/DELETE /api/storage-test
+  - Purpose: upload test object / delete test object
+  - Source: [app/api/storage-test/route.ts](app/api/storage-test/route.ts)
+
+- POST/DELETE /api/shots/{shotId}/highres
+  - Purpose: upload/remove high-res deliverable on shot
+  - Source: [app/api/shots/[shotId]/highres/route.ts](app/api/shots/%5BshotId%5D/highres/route.ts)
+
+- GET /api/shots/{shotId}/highres/download
+  - Purpose: internal presigned download URL for high-res
+  - Source: [app/api/shots/[shotId]/highres/download/route.ts](app/api/shots/%5BshotId%5D/highres/download/route.ts)
+
+- GET /api/client/{token}/shots/{shotId}/highres/download
+  - Purpose: client token-gated presigned high-res download URL
+  - Source: [app/api/client/[token]/shots/[shotId]/highres/download/route.ts](app/api/client/%5Btoken%5D/shots/%5BshotId%5D/highres/download/route.ts)
+
+- GET/POST/DELETE /api/shots/{shotId}/references
+  - Purpose: shot reference image management
+  - Source: [app/api/shots/[shotId]/references/route.ts](app/api/shots/%5BshotId%5D/references/route.ts)
+
+- GET /api/storyboard/pdf
+  - Purpose: server-rendered printable storyboard HTML with metadata options
+  - Source: [app/api/storyboard/pdf/route.ts](app/api/storyboard/pdf/route.ts)
+
+Notes:
+- No dedicated REST endpoint that runs ffmpeg in this repository.
+- No dedicated REST endpoint that performs EXR rendering on the server.
+- No dedicated deliveries API namespace.
+
+---
+
+## 3. Storage
+
+Primary storage abstraction: [lib/storage.ts](lib/storage.ts)
+
+### Provider modes
+
+- local
+- uploadthing
+- s3
+- r2
+- b2
+- minio
+
+### Dedicated high-res object storage path
+
+- Hetzner object storage helper methods are used for high-res and presigned direct uploads.
+- Config source precedence:
+  - SystemConfig table keys
+  - env fallback
+
+### Folder/key layout in object storage (current code paths)
+
+- videos/
+- image/
+- highres/
+- storage-test/
+
+### Local storage
+
+- LOCAL_UPLOAD_DIR (default ./uploads)
+- Served via /api/files catch-all route
+
+### File naming conventions
+
+- Key format: {folder}/{uuid}-{sanitized-file-name}
+- Sanitization done by sanitizeFileName to avoid URL/signature problems in object keys
+
+### EXR locations
+
+Within web app/runtime:
+- EXR references are naming metadata (Shot.exrOutput) and file-serving pathing.
+
+Within DCC tooling docs/scripts:
+- AE/Nuke workflows target shared export roots and per-shot folders.
+
+### Preview locations
+
+- Version media URLs stored in Version.fileUrl
+- Accessed through app player routes and /api/files routing where applicable
+
+### Thumbnail locations
+
+- Shot.thumbnailUrl
+- Version.thumbnailUrl
+- Can point to /api/files/{key} or external provider URL
+
+Relevant sources:
+- [lib/storage.ts](lib/storage.ts)
+- [app/api/files/[...key]/route.ts](app/api/files/%5B...key%5D/route.ts)
+- [actions/settings.ts](actions/settings.ts)
+
+---
+
+## 4. Export Pipeline (Current)
+
+### AE panel
+
+Documented in repo:
+- [VFXReviewConnector.md](VFXReviewConnector.md)
+- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)
+
+Implemented panel script also exists on the host AE installation (outside workspace), and behavior aligns with docs:
+- Episodes/shots discovery via ext APIs
+- Shot lookup API usage for metadata
+- Overlay/slate essential property updates (burn-in style overlays)
+- Queue EXR / Queue MP4 / Queue MOV render queue actions
+- Queue EXR (review convention)
+- Import exported EXR and import renders
+- Pull picture lock using seq timecodes
+- Increment shot version by PATCH call
+- Delivery prep that copies/renames EXR files to delivery folder convention
+
+### External API endpoints used by DCC tools
+
+- GET /api/ext/projects/{projectCode}/episodes
+- GET /api/ext/projects/{projectCode}/shots
+- GET /api/ext/shots/lookup
+- PATCH /api/ext/shots/{shotId}
+
+### Existing render scripts and pipelines
+
+- AE panel render queue automation (external script)
+- Nuke connector script creating write-node outputs and shot scripts:
+  - [VFXReviewConnector.py](VFXReviewConnector.py)
+
+### ffmpeg scripts
+
+- None found in this repository.
+
+### Proxy generation
+
+- Version.proxyUrl field exists in schema.
+- No implemented proxy-generation worker/function found.
+
+### Thumbnail generation
+
+- Upload/assignment flows exist.
+- No server-side frame-extract thumbnail generator found.
+
+### Metadata extraction
+
+- EDL / picture-tracker CSV metadata parsing implemented:
+  - [lib/edl-utils.ts](lib/edl-utils.ts)
+  - [actions/shots.ts](actions/shots.ts)
+
+### Burn-in generation
+
+- Achieved via DCC overlay/slate layers and essential properties in AE/Nuke tool workflows.
+- No ffmpeg burn-in path found.
+
+---
+
+## 5. Review System
+
+### Current review workflow
+
+Core status derivation:
+- [lib/shot-status.ts](lib/shot-status.ts)
+
+Server action orchestration:
+- [actions/versions.ts](actions/versions.ts)
+- [actions/approvals.ts](actions/approvals.ts)
+- [actions/tasks.ts](actions/tasks.ts)
+- [actions/shots.ts](actions/shots.ts)
+- [actions/comments.ts](actions/comments.ts)
+
+### Internal review
+
+- Version upload:
+  - marks previous versions non-latest
+  - creates new latest version
+  - moves Task to INTERNAL_REVIEW
+  - recalculates Shot.status
+
+### Client review
+
+- Tokenized ReviewSession links
+- Optional password gate with signed cookie unlock
+- Client comment/annotation/approval endpoints
+- Share/unshare semantics via shot and version visibility fields
+
+### Task status flow
+
+Observed statuses:
+- TODO
+- IN_PROGRESS
+- INTERNAL_REVIEW
+- CLIENT_REVIEW
+- CHANGES
+- DONE
+
+### Shot status flow
+
+Derived in priority order:
+- REVISIONS (any task CHANGES)
+- COMPLETE (shotApprovalStatus CLIENT_APPROVED)
+- CLIENT_REVIEW / READY_FOR_CLIENT (internally approved + share flag)
+- IN_PROGRESS (task TODO/IN_PROGRESS)
+- INTERNAL_REVIEW (tasks exist)
+- WAITING (no tasks)
+
+### Approval process
+
+- Version-level approvals create Approval rows and update Version.approvalStatus
+- Shot-level client actions supported via client approve endpoint and shot actions
+
+Reference doc in repo:
+- [Shot task workflow.md](Shot%20task%20workflow.md)
+
+---
+
+## 6. Authentication
+
+### External tools
+
+- /api/ext/* routes authenticate using API_SECRET_KEY via:
+  - Authorization: Bearer <key>
+  - x-api-key header
+
+### Client review links
+
+- tokenized route with ReviewSession lookup
+- optional password hash validation and signed unlock cookie
+
+### App users
+
+- NextAuth credentials provider
+- bcrypt password hash compare
+- JWT session strategy
+
+### Middleware behavior
+
+- Route classes allowed through middleware auth gate:
+  - /api/ext/
+  - /api/client/
+  - /api/display/
+  - /api/files/
+  - /api/uploadthing
+- Per-route auth still enforced in handlers
+
+Sources:
+- [auth.ts](auth.ts)
+- [auth.config.ts](auth.config.ts)
+- [middleware.ts](middleware.ts)
+- [lib/review-auth.ts](lib/review-auth.ts)
+
+---
+
+## 7. Existing Background Jobs
+
+### Cron jobs
+- None found.
+
+### Queues
+- None found.
+
+### Workers
+- None found.
+
+### Polling services
+- Display devices poll:
+  - /api/display/events
+  - /api/dashboard/stats
+
+### Docker containers
+- vfxreview app container
+- postgres container
+- Source: [docker-compose.yml](docker-compose.yml)
+
+### Scheduled tasks
+- Startup migration commands in container entrypoint:
+  - [entrypoint.sh](entrypoint.sh)
+- AE panel Prep Delivery launches background PowerShell copy scripts on workstation (outside web app runtime)
+
+---
+
+## 8. After Effects Integration (Implemented Features)
+
+Repo-level references:
+- [VFXReviewConnector.md](VFXReviewConnector.md)
+- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)
+
+Implemented capabilities observed/documented:
+
+- API calls
+  - episodes/shots listing and shot lookup
+  - shot version PATCH
+- Authentication
+  - bearer API token in script
+- Comp discovery
+  - shot code extraction from comp names and dropdown selection
+- Render queue integration
+  - EXR Sequence
+  - REVIEW_PREVIEW (MP4)
+  - 4444 Tri (MOV)
+  - EXR review sequence queue variant
+- Output path generation
+  - shot/version naming conventions + export root paths
+- Shot lookup
+  - uses /api/ext/shots/lookup for metadata and naming decisions
+- Upload features
+  - no direct upload-to-web API flow in panel docs/script (render/output handled in DCC/filesystem)
+- Burn-in generation
+  - overlay and slate essential properties
+- Review integration
+  - preview comp build and version increment sync
+
+---
+
+## 9. Configuration
+
+### Environment variables
+
+Primary reference: [.env.example](.env.example)
+
+Observed vars in code/docs include:
+
+- DATABASE_URL
+- NEXTAUTH_SECRET
+- NEXTAUTH_URL
+- NEXT_PUBLIC_APP_URL
+- NEXT_PUBLIC_APP_NAME
+- API_SECRET_KEY
+- AUTH_SECRET
+- STORAGE_PROVIDER
+- LOCAL_UPLOAD_DIR
+- AWS_ACCESS_KEY_ID
+- AWS_SECRET_ACCESS_KEY
+- AWS_REGION
+- AWS_BUCKET_NAME
+- R2_ACCESS_KEY_ID
+- R2_SECRET_ACCESS_KEY
+- R2_ACCOUNT_ID
+- R2_BUCKET_NAME
+- R2_PUBLIC_URL
+- B2_APPLICATION_KEY_ID
+- B2_APPLICATION_KEY
+- B2_BUCKET_NAME
+- B2_ENDPOINT
+- MINIO_ENDPOINT
+- MINIO_ACCESS_KEY
+- MINIO_SECRET_KEY
+- MINIO_BUCKET_NAME
+- HETZNER_ENDPOINT
+- HETZNER_ACCESS_KEY
+- HETZNER_SECRET_KEY
+- HETZNER_BUCKET_NAME
+- UPLOADTHING_SECRET
+- UPLOADTHING_APP_ID
+- EMAIL_FROM
+- EMAIL_SERVER_HOST
+- EMAIL_SERVER_PORT
+- EMAIL_SERVER_USER
+- EMAIL_SERVER_PASSWORD
+- SLACK_DEFAULT_WEBHOOK
+
+### Storage configuration
+
+- Provider abstraction in [lib/storage.ts](lib/storage.ts)
+- Hetzner overrides in [actions/settings.ts](actions/settings.ts) and SystemConfig table
+
+### Render configuration
+
+- No server-side renderer configuration module found.
+- DCC render templates are documented in [VFXReviewConnector.md](VFXReviewConnector.md).
+
+### ffmpeg configuration
+
+- None found in repository.
+
+### Object storage configuration
+
+- Implemented for AWS S3/R2/B2/MinIO + dedicated Hetzner helper path
+
+---
+
+## 10. Existing Utility Functions (Reusable)
+
+### Metadata extraction
+
+- parseEdlCsv
+- parsePictureTrackerCsv
+- Source: [lib/edl-utils.ts](lib/edl-utils.ts)
+
+### File scanning
+
+- Local upload tree walker in migration route
+- Nuke connector plate/render directory scanners
+- Sources:
+  - [app/api/admin/migration/route.ts](app/api/admin/migration/route.ts)
+  - [VFXReviewConnector.py](VFXReviewConnector.py)
+
+### EXR sequence detection
+
+- Nuke connector helper sequence detectors and pattern conversion
+- Source: [VFXReviewConnector.py](VFXReviewConnector.py)
+
+### MOV generation
+
+- No server-side MOV generation utility found.
+- MOV outputs are DCC render queue outputs in external scripts/docs.
+
+### Checksums
+
+- No checksum utility found.
+
+### Frame counting
+
+- durationToFrameCount and frame math helpers
+- Source: [lib/frame-utils.ts](lib/frame-utils.ts)
+
+### Timecode extraction/conversion
+
+- frameToTimecode / formatTimecode
+- CSV timecode validation/parsing
+- Sources:
+  - [lib/frame-utils.ts](lib/frame-utils.ts)
+  - [lib/utils.ts](lib/utils.ts)
+  - [lib/edl-utils.ts](lib/edl-utils.ts)
+
+---
+
+## 11. High-Level Architecture Diagram
+
+```mermaid
+flowchart LR
+  A[AE Panel / Nuke Connector\nExternal DCC tools] -->|API key auth| B[Next.js App Router APIs]
+  B --> C[Prisma ORM]
+  C --> D[(PostgreSQL)]
+
+  B --> E[Storage Abstraction]
+  E --> F[(Hetzner Object Storage)]
+  E --> G[(S3/R2/B2/MinIO)]
+  B --> H[(Local uploads dir)]
+
+  I[Internal reviewers\nNextAuth session] --> B
+  J[Client reviewers\nToken review sessions] --> B
+
+  K[ESP32 display client] -->|x-display-key polling| B
+
+  A --> L[Shared filesystem render roots\nEXR/MP4/MOV outputs]
+  L -->|served/linked via app metadata| B
+```
+
+---
+
+## 12. Files Inspected (Primary)
+
+- [prisma/schema.prisma](prisma/schema.prisma)
+- [lib/storage.ts](lib/storage.ts)
+- [lib/shot-status.ts](lib/shot-status.ts)
+- [lib/review-auth.ts](lib/review-auth.ts)
+- [lib/edl-utils.ts](lib/edl-utils.ts)
+- [lib/frame-utils.ts](lib/frame-utils.ts)
+- [lib/utils.ts](lib/utils.ts)
+- [auth.ts](auth.ts)
+- [auth.config.ts](auth.config.ts)
+- [middleware.ts](middleware.ts)
+- [next.config.ts](next.config.ts)
+- [.env.example](.env.example)
+- [docker-compose.yml](docker-compose.yml)
+- [Dockerfile](Dockerfile)
+- [entrypoint.sh](entrypoint.sh)
+- [EXT_API_REFERENCE.md](EXT_API_REFERENCE.md)
+- [VFXReviewConnector.md](VFXReviewConnector.md)
+- [VFXReviewConnector.py](VFXReviewConnector.py)
+- [# VFXReview Connector for Nuke.md](#%20VFXReview%20Connector%20for%20Nuke.md)
+- API handlers under [app/api](app/api)
+- Server actions under [actions](actions)
+
+---
+
+End of current-state report.

app/(dashboard)/pipeline/PipelineQueueClient.tsx

@@ -0,0 +1,273 @@
+"use client";
+
+import { useState } from "react";
+import Link from "next/link";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { useSession } from "next-auth/react";
+import { RefreshCw, RotateCcw, XCircle, CheckCircle2, Server } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Progress } from "@/components/ui/progress";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { useToast } from "@/components/ui/use-toast";
+import { cn } from "@/lib/utils";
+import {
+  EXPORT_STATUS_STYLES,
+  FAILED_STATUSES,
+  ACTIVE_STATUSES,
+  statusLabel,
+  formatEta,
+} from "./status-colors";
+
+interface QueueExport {
+  id: string;
+  shotCode: string;
+  episode: string | null;
+  projectName: string;
+  projectCode: string;
+  versionString: string;
+  status: string;
+  statusChangedAt: string;
+  createdAt: string;
+  outputDir: string;
+  job: {
+    id: string;
+    attempt: number;
+    status: string;
+    progress: number;
+    currentFrame: number | null;
+    totalFrames: number | null;
+    etaSeconds: number | null;
+    priority: number;
+    machineName: string | null;
+    errorMessage: string | null;
+  } | null;
+}
+
+interface Props {
+  projects: { id: string; name: string; code: string }[];
+}
+
+export function PipelineQueueClient({ projects }: Props) {
+  const { data: session } = useSession();
+  const { toast } = useToast();
+  const queryClient = useQueryClient();
+  const [projectId, setProjectId] = useState<string>("all");
+  const [statusFilter, setStatusFilter] = useState<string>("all");
+  const isAdmin = ["ADMIN", "PRODUCER", "SUPERVISOR"].includes(session?.user?.role ?? "");
+
+  const { data, isLoading, refetch, isFetching } = useQuery({
+    queryKey: ["pipeline-queue", projectId, statusFilter],
+    queryFn: async () => {
+      const params = new URLSearchParams({ limit: "200" });
+      if (projectId !== "all") params.set("projectId", projectId);
+      if (statusFilter !== "all") params.set("status", statusFilter);
+      const res = await fetch(`/api/render/queue?${params}`);
+      if (!res.ok) throw new Error("Failed to load queue");
+      return res.json() as Promise<{ exports: QueueExport[]; pagination: { total: number } }>;
+    },
+    refetchInterval: 5000,
+  });
+
+  const exports = data?.exports ?? [];
+  const counts = {
+    queued: exports.filter((e) => e.status === "QUEUED").length,
+    rendering: exports.filter((e) => e.status === "RENDERING").length,
+    failed: exports.filter((e) => FAILED_STATUSES.includes(e.status)).length,
+    readyForQc: exports.filter((e) => e.status === "READY_FOR_QC").length,
+    readyForDelivery: exports.filter((e) => e.status === "READY_FOR_DELIVERY").length,
+  };
+
+  async function action(exportId: string, verb: "retry" | "cancel" | "mark-done") {
+    const res = await fetch(`/api/render/exports/${exportId}/${verb}`, { method: "POST" });
+    const body = await res.json().catch(() => ({}));
+    if (!res.ok) {
+      toast({ title: `${verb} failed`, description: body.error ?? res.statusText, variant: "destructive" });
+    } else {
+      toast({ title: `Export ${verb === "mark-done" ? "marked done" : verb === "retry" ? "requeued" : "cancelled"}` });
+    }
+    queryClient.invalidateQueries({ queryKey: ["pipeline-queue"] });
+  }
+
+  const cards: { label: string; value: number; className?: string }[] = [
+    { label: "Queued", value: counts.queued },
+    { label: "Rendering", value: counts.rendering, className: "text-blue-400" },
+    { label: "Failed", value: counts.failed, className: "text-red-400" },
+    { label: "Ready for QC", value: counts.readyForQc, className: "text-amber-400" },
+    { label: "Ready for Delivery", value: counts.readyForDelivery, className: "text-green-400" },
+  ];
+
+  return (
+    <div className="p-6 space-y-6">
+      <div className="flex items-center justify-between gap-4 flex-wrap">
+        <div>
+          <h1 className="text-2xl font-semibold text-white">Render Queue</h1>
+          <p className="text-sm text-zinc-400 mt-1">
+            Exports queued from the AE panel — live status, retries and history
+          </p>
+        </div>
+        <div className="flex items-center gap-2">
+          <Link href="/pipeline/machines">
+            <Button variant="outline" size="sm">
+              <Server className="h-4 w-4 mr-2" />
+              Machines
+            </Button>
+          </Link>
+          <Button variant="outline" size="sm" onClick={() => refetch()} disabled={isFetching}>
+            <RefreshCw className={cn("h-4 w-4", isFetching && "animate-spin")} />
+          </Button>
+        </div>
+      </div>
+
+      {/* Summary cards */}
+      <div className="grid grid-cols-2 sm:grid-cols-5 gap-3">
+        {cards.map((c) => (
+          <div key={c.label} className="rounded-lg border border-zinc-800 bg-zinc-900 px-4 py-3">
+            <div className={cn("text-2xl font-semibold text-white", c.className)}>{c.value}</div>
+            <div className="text-xs text-zinc-400 mt-0.5">{c.label}</div>
+          </div>
+        ))}
+      </div>
+
+      {/* Filters */}
+      <div className="flex items-center gap-3 flex-wrap">
+        <Select value={projectId} onValueChange={setProjectId}>
+          <SelectTrigger className="w-56">
+            <SelectValue placeholder="All projects" />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="all">All projects</SelectItem>
+            {projects.map((p) => (
+              <SelectItem key={p.id} value={p.id}>
+                {p.name}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
+        <Select value={statusFilter} onValueChange={setStatusFilter}>
+          <SelectTrigger className="w-56">
+            <SelectValue placeholder="All statuses" />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="all">All statuses</SelectItem>
+            {Object.keys(EXPORT_STATUS_STYLES).map((s) => (
+              <SelectItem key={s} value={s}>
+                {statusLabel(s)}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
+      </div>
+
+      {/* Table */}
+      <div className="rounded-lg border border-zinc-800 overflow-x-auto">
+        <table className="w-full text-sm">
+          <thead>
+            <tr className="border-b border-zinc-800 bg-zinc-900/60 text-left text-xs text-zinc-400">
+              <th className="px-4 py-2.5 font-medium">Shot</th>
+              <th className="px-4 py-2.5 font-medium">Version</th>
+              <th className="px-4 py-2.5 font-medium">Status</th>
+              <th className="px-4 py-2.5 font-medium w-48">Progress</th>
+              <th className="px-4 py-2.5 font-medium">Machine</th>
+              <th className="px-4 py-2.5 font-medium">Attempt</th>
+              <th className="px-4 py-2.5 font-medium">Queued</th>
+              <th className="px-4 py-2.5 font-medium text-right">Actions</th>
+            </tr>
+          </thead>
+          <tbody>
+            {isLoading ? (
+              <tr>
+                <td colSpan={8} className="px-4 py-10 text-center text-zinc-500">
+                  Loading…
+                </td>
+              </tr>
+            ) : exports.length === 0 ? (
+              <tr>
+                <td colSpan={8} className="px-4 py-10 text-center text-zinc-500">
+                  No exports yet — queue one from the After Effects panel
+                </td>
+              </tr>
+            ) : (
+              exports.map((e) => (
+                <tr key={e.id} className="border-b border-zinc-800/60 hover:bg-zinc-900/40">
+                  <td className="px-4 py-2.5">
+                    <Link href={`/pipeline/exports/${e.id}`} className="text-white hover:text-amber-400 font-medium">
+                      {e.shotCode}
+                    </Link>
+                    <div className="text-xs text-zinc-500">
+                      {e.projectCode}
+                      {e.episode ? ` · ep ${e.episode}` : ""}
+                    </div>
+                  </td>
+                  <td className="px-4 py-2.5 text-zinc-300">{e.versionString}</td>
+                  <td className="px-4 py-2.5">
+                    <span
+                      className={cn(
+                        "inline-block rounded-full border px-2 py-0.5 text-xs whitespace-nowrap",
+                        EXPORT_STATUS_STYLES[e.status] ?? "bg-zinc-500/15 text-zinc-300 border-zinc-500/30"
+                      )}
+                      title={e.job?.errorMessage ?? undefined}
+                    >
+                      {statusLabel(e.status)}
+                    </span>
+                  </td>
+                  <td className="px-4 py-2.5">
+                    {e.status === "RENDERING" && e.job ? (
+                      <div className="space-y-1">
+                        <Progress value={e.job.progress * 100} className="h-1.5" />
+                        <div className="text-xs text-zinc-500">
+                          {e.job.currentFrame != null && e.job.totalFrames != null
+                            ? `frame ${e.job.currentFrame}/${e.job.totalFrames} · `
+                            : ""}
+                          ETA {formatEta(e.job.etaSeconds)}
+                        </div>
+                      </div>
+                    ) : (
+                      <span className="text-zinc-600 text-xs">—</span>
+                    )}
+                  </td>
+                  <td className="px-4 py-2.5 text-zinc-400">{e.job?.machineName ?? "—"}</td>
+                  <td className="px-4 py-2.5 text-zinc-400">
+                    {e.job ? `${e.job.attempt}` : "—"}
+                  </td>
+                  <td className="px-4 py-2.5 text-zinc-500 text-xs whitespace-nowrap">
+                    {new Date(e.createdAt).toLocaleString()}
+                  </td>
+                  <td className="px-4 py-2.5">
+                    <div className="flex items-center justify-end gap-1">
+                      {FAILED_STATUSES.includes(e.status) && (
+                        <Button variant="ghost" size="icon-sm" title="Retry" onClick={() => action(e.id, "retry")}>
+                          <RotateCcw className="h-4 w-4 text-amber-400" />
+                        </Button>
+                      )}
+                      {ACTIVE_STATUSES.includes(e.status) && (
+                        <Button variant="ghost" size="icon-sm" title="Cancel" onClick={() => action(e.id, "cancel")}>
+                          <XCircle className="h-4 w-4 text-red-400" />
+                        </Button>
+                      )}
+                      {isAdmin && ["QUEUED", "RENDERING"].includes(e.status) && (
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          title="Mark done manually (rendered outside the pipeline)"
+                          onClick={() => action(e.id, "mark-done")}
+                        >
+                          <CheckCircle2 className="h-4 w-4 text-green-400" />
+                        </Button>
+                      )}
+                    </div>
+                  </td>
+                </tr>
+              ))
+            )}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}

app/(dashboard)/pipeline/exports/[exportId]/ExportDetailClient.tsx

@@ -0,0 +1,256 @@
+"use client";
+
+import Link from "next/link";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { ArrowLeft, RotateCcw, XCircle } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { useToast } from "@/components/ui/use-toast";
+import { cn } from "@/lib/utils";
+import {
+  EXPORT_STATUS_STYLES,
+  FAILED_STATUSES,
+  ACTIVE_STATUSES,
+  statusLabel,
+} from "../../status-colors";
+
+interface ExportDetail {
+  export: {
+    id: string;
+    status: string;
+    versionString: string;
+    statusChangedAt: string;
+    createdAt: string;
+    aepPath: string;
+    compName: string;
+    outputDir: string;
+    outputPattern: string;
+    frameStart: number;
+    frameEnd: number;
+    fps: number;
+    width: number;
+    height: number;
+    colorspace: string | null;
+    exrFileCount: number | null;
+    exrTotalBytes: number | null;
+    vfxScope: string | null;
+    submissionNote: string | null;
+    submittedByName: string | null;
+    shot: {
+      id: string;
+      shotCode: string;
+      episode: string | null;
+      project: { id: string; name: string; code: string };
+    };
+    renderJobs: {
+      id: string;
+      attempt: number;
+      status: string;
+      priority: number;
+      progress: number;
+      currentFrame: number | null;
+      totalFrames: number | null;
+      errorMessage: string | null;
+      logTail: string | null;
+      exitCode: number | null;
+      claimedAt: string | null;
+      startedAt: string | null;
+      finishedAt: string | null;
+      machine: { id: string; name: string } | null;
+    }[];
+    events: {
+      id: string;
+      fromStatus: string | null;
+      toStatus: string;
+      actorType: string;
+      actorId: string | null;
+      note: string | null;
+      createdAt: string;
+    }[];
+  };
+}
+
+export function ExportDetailClient({ exportId }: { exportId: string }) {
+  const { toast } = useToast();
+  const queryClient = useQueryClient();
+
+  const { data, isLoading, error } = useQuery({
+    queryKey: ["pipeline-export", exportId],
+    queryFn: async () => {
+      const res = await fetch(`/api/render/exports/${exportId}`);
+      if (!res.ok) throw new Error((await res.json().catch(() => ({})))?.error ?? "Failed to load export");
+      return res.json() as Promise<ExportDetail>;
+    },
+    refetchInterval: 5000,
+  });
+
+  async function action(verb: "retry" | "cancel") {
+    const res = await fetch(`/api/render/exports/${exportId}/${verb}`, { method: "POST" });
+    const body = await res.json().catch(() => ({}));
+    if (!res.ok) {
+      toast({ title: `${verb} failed`, description: body.error ?? res.statusText, variant: "destructive" });
+    }
+    queryClient.invalidateQueries({ queryKey: ["pipeline-export", exportId] });
+  }
+
+  if (isLoading) return <div className="p-6 text-zinc-500">Loading…</div>;
+  if (error || !data) {
+    return (
+      <div className="p-6 text-red-400">
+        {(error as Error)?.message ?? "Export not found"}
+      </div>
+    );
+  }
+
+  const e = data.export;
+  const manifestRows: [string, string][] = [
+    ["Project", `${e.shot.project.name} (${e.shot.project.code})`],
+    ["Shot", e.shot.shotCode],
+    ["Comp", e.compName],
+    ["AEP", e.aepPath],
+    ["Output dir", e.outputDir],
+    ["Pattern", e.outputPattern],
+    ["Frames", `${e.frameStart}–${e.frameEnd} @ ${e.fps} fps`],
+    ["Resolution", `${e.width}×${e.height}`],
+    ["Colorspace", e.colorspace ?? "—"],
+    ["EXR files", e.exrFileCount != null ? String(e.exrFileCount) : "—"],
+    ["Submitted by", e.submittedByName ?? "—"],
+  ];
+
+  return (
+    <div className="p-6 space-y-6 max-w-5xl">
+      <div className="flex items-center justify-between gap-4 flex-wrap">
+        <div className="flex items-center gap-3">
+          <Link href="/pipeline">
+            <Button variant="ghost" size="icon-sm">
+              <ArrowLeft className="h-4 w-4" />
+            </Button>
+          </Link>
+          <div>
+            <h1 className="text-xl font-semibold text-white">
+              {e.shot.shotCode} · {e.versionString}
+            </h1>
+            <span
+              className={cn(
+                "inline-block mt-1 rounded-full border px-2 py-0.5 text-xs",
+                EXPORT_STATUS_STYLES[e.status] ?? ""
+              )}
+            >
+              {statusLabel(e.status)}
+            </span>
+          </div>
+        </div>
+        <div className="flex items-center gap-2">
+          {FAILED_STATUSES.includes(e.status) && (
+            <Button variant="outline" size="sm" onClick={() => action("retry")}>
+              <RotateCcw className="h-4 w-4 mr-2 text-amber-400" /> Retry
+            </Button>
+          )}
+          {ACTIVE_STATUSES.includes(e.status) && (
+            <Button variant="outline" size="sm" onClick={() => action("cancel")}>
+              <XCircle className="h-4 w-4 mr-2 text-red-400" /> Cancel
+            </Button>
+          )}
+        </div>
+      </div>
+
+      {/* Manifest */}
+      <div className="rounded-lg border border-zinc-800 bg-zinc-900/40">
+        <div className="px-4 py-2.5 border-b border-zinc-800 text-sm font-medium text-white">Manifest</div>
+        <dl className="grid sm:grid-cols-2 gap-x-8 gap-y-2 p-4 text-sm">
+          {manifestRows.map(([k, v]) => (
+            <div key={k} className="flex gap-3">
+              <dt className="w-28 shrink-0 text-zinc-500">{k}</dt>
+              <dd className="text-zinc-300 break-all">{v}</dd>
+            </div>
+          ))}
+        </dl>
+      </div>
+
+      {/* Per-submission slate fields */}
+      {(e.vfxScope || e.submissionNote) && (
+        <div className="rounded-lg border border-zinc-800 bg-zinc-900/40">
+          <div className="px-4 py-2.5 border-b border-zinc-800 text-sm font-medium text-white">
+            Submission
+          </div>
+          <dl className="p-4 space-y-3 text-sm">
+            {e.vfxScope && (
+              <div>
+                <dt className="text-zinc-500 mb-0.5">VFX Scope</dt>
+                <dd className="text-zinc-300 whitespace-pre-wrap">{e.vfxScope}</dd>
+              </div>
+            )}
+            {e.submissionNote && (
+              <div>
+                <dt className="text-zinc-500 mb-0.5">Submission Note</dt>
+                <dd className="text-zinc-300 whitespace-pre-wrap">{e.submissionNote}</dd>
+              </div>
+            )}
+          </dl>
+        </div>
+      )}
+
+      {/* Render attempts */}
+      <div className="rounded-lg border border-zinc-800 bg-zinc-900/40">
+        <div className="px-4 py-2.5 border-b border-zinc-800 text-sm font-medium text-white">
+          Render attempts
+        </div>
+        <div className="divide-y divide-zinc-800/60">
+          {e.renderJobs.map((j) => (
+            <div key={j.id} className="p-4 text-sm">
+              <div className="flex items-center gap-3 flex-wrap">
+                <span className="text-white font-medium">Attempt {j.attempt}</span>
+                <span className="text-xs text-zinc-400">{j.status}</span>
+                <span className="text-xs text-zinc-500">{j.machine?.name ?? "unclaimed"}</span>
+                {j.exitCode != null && <span className="text-xs text-zinc-500">exit {j.exitCode}</span>}
+                {j.startedAt && (
+                  <span className="text-xs text-zinc-500">
+                    started {new Date(j.startedAt).toLocaleString()}
+                  </span>
+                )}
+                {j.finishedAt && (
+                  <span className="text-xs text-zinc-500">
+                    finished {new Date(j.finishedAt).toLocaleString()}
+                  </span>
+                )}
+              </div>
+              {j.errorMessage && <div className="mt-1 text-xs text-red-400">{j.errorMessage}</div>}
+              {j.logTail && (
+                <details className="mt-2">
+                  <summary className="text-xs text-zinc-500 cursor-pointer hover:text-zinc-300">
+                    Log tail
+                  </summary>
+                  <pre className="mt-2 max-h-64 overflow-auto rounded bg-black/40 p-3 text-xs text-zinc-400 whitespace-pre-wrap">
+                    {j.logTail}
+                  </pre>
+                </details>
+              )}
+            </div>
+          ))}
+          {e.renderJobs.length === 0 && (
+            <div className="p-4 text-sm text-zinc-500">No attempts yet</div>
+          )}
+        </div>
+      </div>
+
+      {/* Event timeline */}
+      <div className="rounded-lg border border-zinc-800 bg-zinc-900/40">
+        <div className="px-4 py-2.5 border-b border-zinc-800 text-sm font-medium text-white">Timeline</div>
+        <ol className="p-4 space-y-2">
+          {e.events.map((ev) => (
+            <li key={ev.id} className="flex items-start gap-3 text-sm">
+              <span className="text-xs text-zinc-500 w-40 shrink-0 whitespace-nowrap">
+                {new Date(ev.createdAt).toLocaleString()}
+              </span>
+              <span className="text-zinc-300">
+                {ev.fromStatus ? `${statusLabel(ev.fromStatus)} → ` : ""}
+                {statusLabel(ev.toStatus)}
+                <span className="text-zinc-500"> · {ev.actorType.toLowerCase()}</span>
+                {ev.note && <span className="block text-xs text-zinc-500">{ev.note}</span>}
+              </span>
+            </li>
+          ))}
+        </ol>
+      </div>
+    </div>
+  );
+}

app/(dashboard)/pipeline/exports/[exportId]/page.tsx

@@ -0,0 +1,17 @@
+import { auth } from "@/auth";
+import { redirect } from "next/navigation";
+import { ExportDetailClient } from "./ExportDetailClient";
+
+export const dynamic = "force-dynamic";
+
+export default async function ExportDetailPage({
+  params,
+}: {
+  params: Promise<{ exportId: string }>;
+}) {
+  const session = await auth();
+  if (!session?.user) redirect("/login");
+  if (session.user.role === "CLIENT") redirect("/dashboard");
+  const { exportId } = await params;
+  return <ExportDetailClient exportId={exportId} />;
+}

app/(dashboard)/pipeline/machines/MachinesClient.tsx

@@ -0,0 +1,206 @@
+"use client";
+
+import Link from "next/link";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { useSession } from "next-auth/react";
+import { ArrowLeft, Zap, Power, Cpu, HardDrive, MemoryStick } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Progress } from "@/components/ui/progress";
+import { useToast } from "@/components/ui/use-toast";
+import { cn } from "@/lib/utils";
+
+interface MachineRow {
+  id: string;
+  name: string;
+  hostname: string;
+  enabled: boolean;
+  status: "ONLINE" | "OFFLINE" | "DISABLED";
+  lastSeenAt: string | null;
+  workerVersion: string | null;
+  aeVersion: string | null;
+  availability: { mode?: string } | null;
+  renderNowUntil: string | null;
+  latestHeartbeat: {
+    createdAt: string;
+    cpuPercent: number | null;
+    memPercent: number | null;
+    diskFreeGb: number | null;
+  } | null;
+  currentJob: {
+    id: string;
+    exportId: string | null;
+    shotCode: string | null;
+    versionString: string | null;
+    progress: number;
+    etaSeconds: number | null;
+  } | null;
+}
+
+const STATUS_STYLES: Record<string, string> = {
+  ONLINE: "bg-green-500/15 text-green-400 border-green-500/30",
+  OFFLINE: "bg-zinc-500/15 text-zinc-400 border-zinc-500/30",
+  DISABLED: "bg-red-500/15 text-red-400 border-red-500/30",
+};
+
+export function MachinesClient() {
+  const { data: session } = useSession();
+  const { toast } = useToast();
+  const queryClient = useQueryClient();
+  const isAdmin = ["ADMIN", "PRODUCER", "SUPERVISOR"].includes(session?.user?.role ?? "");
+
+  const { data, isLoading } = useQuery({
+    queryKey: ["pipeline-machines"],
+    queryFn: async () => {
+      const res = await fetch("/api/machines");
+      if (!res.ok) throw new Error("Failed to load machines");
+      return res.json() as Promise<{ machines: MachineRow[] }>;
+    },
+    refetchInterval: 10000,
+  });
+
+  async function patch(machineId: string, body: Record<string, unknown>, okMsg: string) {
+    const res = await fetch(`/api/machines/${machineId}`, {
+      method: "PATCH",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(body),
+    });
+    const resBody = await res.json().catch(() => ({}));
+    if (!res.ok) {
+      toast({ title: "Update failed", description: resBody.error ?? res.statusText, variant: "destructive" });
+    } else {
+      toast({ title: okMsg });
+    }
+    queryClient.invalidateQueries({ queryKey: ["pipeline-machines"] });
+  }
+
+  const machines = data?.machines ?? [];
+
+  return (
+    <div className="p-6 space-y-6">
+      <div className="flex items-center gap-3">
+        <Link href="/pipeline">
+          <Button variant="ghost" size="icon-sm">
+            <ArrowLeft className="h-4 w-4" />
+          </Button>
+        </Link>
+        <div>
+          <h1 className="text-2xl font-semibold text-white">Render Machines</h1>
+          <p className="text-sm text-zinc-400 mt-1">
+            Worker status, render windows and the Render Now override
+          </p>
+        </div>
+      </div>
+
+      {isLoading ? (
+        <div className="text-zinc-500">Loading…</div>
+      ) : machines.length === 0 ? (
+        <div className="rounded-lg border border-zinc-800 bg-zinc-900/40 p-10 text-center text-zinc-500">
+          No machines registered yet — install the RenderWorker service on a workstation and it will
+          appear here after its first registration.
+        </div>
+      ) : (
+        <div className="grid gap-4 sm:grid-cols-2 xl:grid-cols-3">
+          {machines.map((m) => {
+            const renderNowActive = m.renderNowUntil && new Date(m.renderNowUntil) > new Date();
+            return (
+              <div key={m.id} className="rounded-lg border border-zinc-800 bg-zinc-900 p-4 space-y-3">
+                <div className="flex items-center justify-between">
+                  <div>
+                    <div className="text-white font-medium">{m.name}</div>
+                    <div className="text-xs text-zinc-500">{m.hostname}</div>
+                  </div>
+                  <span
+                    className={cn("rounded-full border px-2 py-0.5 text-xs", STATUS_STYLES[m.status])}
+                  >
+                    {m.status}
+                  </span>
+                </div>
+
+                <div className="text-xs text-zinc-500 space-y-0.5">
+                  <div>Worker {m.workerVersion ?? "?"} · AE {m.aeVersion ?? "?"}</div>
+                  <div>
+                    Availability: {m.availability?.mode ?? "ALWAYS"}
+                    {renderNowActive && (
+                      <span className="text-amber-400">
+                        {" "}· Render Now until {new Date(m.renderNowUntil!).toLocaleTimeString()}
+                      </span>
+                    )}
+                  </div>
+                  {m.lastSeenAt && <div>Last seen {new Date(m.lastSeenAt).toLocaleString()}</div>}
+                </div>
+
+                {m.latestHeartbeat && (
+                  <div className="flex items-center gap-4 text-xs text-zinc-400">
+                    <span className="flex items-center gap-1">
+                      <Cpu className="h-3.5 w-3.5" />
+                      {m.latestHeartbeat.cpuPercent != null ? `${Math.round(m.latestHeartbeat.cpuPercent)}%` : "—"}
+                    </span>
+                    <span className="flex items-center gap-1">
+                      <MemoryStick className="h-3.5 w-3.5" />
+                      {m.latestHeartbeat.memPercent != null ? `${Math.round(m.latestHeartbeat.memPercent)}%` : "—"}
+                    </span>
+                    <span className="flex items-center gap-1">
+                      <HardDrive className="h-3.5 w-3.5" />
+                      {m.latestHeartbeat.diskFreeGb != null ? `${Math.round(m.latestHeartbeat.diskFreeGb)} GB free` : "—"}
+                    </span>
+                  </div>
+                )}
+
+                {m.currentJob ? (
+                  <div className="rounded bg-zinc-800/60 p-2.5 space-y-1.5">
+                    <div className="text-xs text-zinc-300">
+                      Rendering{" "}
+                      {m.currentJob.exportId ? (
+                        <Link
+                          href={`/pipeline/exports/${m.currentJob.exportId}`}
+                          className="text-amber-400 hover:underline"
+                        >
+                          {m.currentJob.shotCode} {m.currentJob.versionString}
+                        </Link>
+                      ) : (
+                        "job"
+                      )}
+                    </div>
+                    <Progress value={m.currentJob.progress * 100} className="h-1.5" />
+                  </div>
+                ) : (
+                  <div className="text-xs text-zinc-600">Idle</div>
+                )}
+
+                <div className="flex items-center gap-2 pt-1">
+                  <Button
+                    variant="outline"
+                    size="sm"
+                    disabled={!m.enabled}
+                    onClick={() =>
+                      patch(
+                        m.id,
+                        { renderNowHours: renderNowActive ? 0 : 4 },
+                        renderNowActive ? "Render Now cleared" : "Render Now active for 4 h"
+                      )
+                    }
+                  >
+                    <Zap className={cn("h-4 w-4 mr-1.5", renderNowActive ? "text-amber-400" : "")} />
+                    {renderNowActive ? "Stop Render Now" : "Render Now (4 h)"}
+                  </Button>
+                  {isAdmin && (
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={() =>
+                        patch(m.id, { enabled: !m.enabled }, m.enabled ? "Machine disabled" : "Machine enabled")
+                      }
+                    >
+                      <Power className={cn("h-4 w-4 mr-1.5", m.enabled ? "text-red-400" : "text-green-400")} />
+                      {m.enabled ? "Disable" : "Enable"}
+                    </Button>
+                  )}
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      )}
+    </div>
+  );
+}

app/(dashboard)/pipeline/machines/page.tsx

@@ -0,0 +1,12 @@
+import { auth } from "@/auth";
+import { redirect } from "next/navigation";
+import { MachinesClient } from "./MachinesClient";
+
+export const dynamic = "force-dynamic";
+
+export default async function MachinesPage() {
+  const session = await auth();
+  if (!session?.user) redirect("/login");
+  if (session.user.role === "CLIENT") redirect("/dashboard");
+  return <MachinesClient />;
+}

app/(dashboard)/pipeline/page.tsx

@@ -0,0 +1,20 @@
+import { auth } from "@/auth";
+import { redirect } from "next/navigation";
+import { db } from "@/lib/db";
+import { PipelineQueueClient } from "./PipelineQueueClient";
+
+export const dynamic = "force-dynamic";
+
+export default async function PipelinePage() {
+  const session = await auth();
+  if (!session?.user) redirect("/login");
+  if (session.user.role === "CLIENT") redirect("/dashboard");
+
+  const projects = await db.project.findMany({
+    where: { status: { in: ["ACTIVE", "ON_HOLD"] } },
+    select: { id: true, name: true, code: true },
+    orderBy: { name: "asc" },
+  });
+
+  return <PipelineQueueClient projects={projects} />;
+}

app/(dashboard)/pipeline/status-colors.ts

@@ -0,0 +1,33 @@
+/** Shared status→style maps for the pipeline pages. */
+
+export const EXPORT_STATUS_STYLES: Record<string, string> = {
+  QUEUED: "bg-zinc-500/15 text-zinc-300 border-zinc-500/30",
+  RENDERING: "bg-blue-500/15 text-blue-400 border-blue-500/30",
+  RENDER_FAILED: "bg-red-500/15 text-red-400 border-red-500/30",
+  VALIDATING: "bg-sky-500/15 text-sky-400 border-sky-500/30",
+  VALIDATION_FAILED: "bg-red-500/15 text-red-400 border-red-500/30",
+  GENERATING_PREVIEW: "bg-indigo-500/15 text-indigo-400 border-indigo-500/30",
+  PREVIEW_FAILED: "bg-red-500/15 text-red-400 border-red-500/30",
+  READY_FOR_QC: "bg-amber-500/15 text-amber-400 border-amber-500/30",
+  QC_FAILED: "bg-red-500/15 text-red-400 border-red-500/30",
+  READY_FOR_DELIVERY: "bg-green-500/15 text-green-400 border-green-500/30",
+  PACKAGED: "bg-emerald-500/15 text-emerald-400 border-emerald-500/30",
+  DELIVERED: "bg-emerald-500/15 text-emerald-300 border-emerald-500/30",
+  SUPERSEDED: "bg-zinc-500/10 text-zinc-500 border-zinc-600/30",
+  ARCHIVED: "bg-zinc-500/10 text-zinc-500 border-zinc-600/30",
+  CANCELLED: "bg-zinc-500/10 text-zinc-500 border-zinc-600/30",
+};
+
+export const FAILED_STATUSES = ["RENDER_FAILED", "VALIDATION_FAILED", "PREVIEW_FAILED", "QC_FAILED"];
+export const ACTIVE_STATUSES = ["QUEUED", "RENDERING", "VALIDATING", "GENERATING_PREVIEW"];
+
+export function statusLabel(status: string): string {
+  return status.replaceAll("_", " ");
+}
+
+export function formatEta(seconds: number | null | undefined): string {
+  if (seconds == null || seconds <= 0) return "—";
+  const m = Math.floor(seconds / 60);
+  const s = Math.round(seconds % 60);
+  return m > 0 ? `${m}m ${s}s` : `${s}s`;
+}

app/(dashboard)/projects/[id]/shots/[shotId]/page.tsx

@@ -34,6 +34,7 @@ import {
 import { Input } from "@/components/ui/input";
 import type { ShotWithDetails } from "@/types";
 import { ShotSettingsTab } from "@/components/shots/ShotSettingsTab";
+import { ShotExportsTab } from "@/components/shots/ShotExportsTab";
 import { FootageViewer } from "@/components/shots/FootageViewer";
 import { HighResUploadDialog } from "@/components/shots/HighResUploadDialog";
 import { duplicateShot, internallyApproveShot, shareWithClient, unshareFromClient, unapproveShot, updateShotVersion } from "@/actions/shots";
@@ -89,7 +90,7 @@ export default function ShotDetailPage() {
   const [isDuplicating, setIsDuplicating] = useState(false);
   const [isActioning, setIsActioning] = useState(false);
   const [highResDialogOpen, setHighResDialogOpen] = useState(false);
-  const [activeTab, setActiveTab] = useState<"tasks" | "reviews" | "footage" | "settings">("tasks");
+  const [activeTab, setActiveTab] = useState<"tasks" | "reviews" | "footage" | "exports" | "settings">("tasks");
   const [editingVersion, setEditingVersion] = useState(false);
   const [versionInput, setVersionInput] = useState("");
   const [savingVersion, setSavingVersion] = useState(false);
@@ -543,6 +544,18 @@ export default function ShotDetailPage() {
             <Video className="h-4 w-4" />
             Footage
           </button>
+          <button
+            onClick={() => setActiveTab("exports")}
+            className={cn(
+              "flex items-center gap-2 px-4 py-2.5 text-sm font-medium border-b-2 transition-colors -mb-px",
+              activeTab === "exports"
+                ? "border-amber-500 text-amber-400"
+                : "border-transparent text-zinc-500 hover:text-zinc-300"
+            )}
+          >
+            <Film className="h-4 w-4" />
+            Exports
+          </button>
           {canManage && (
             <button
               onClick={() => setActiveTab("settings")}
@@ -658,6 +671,8 @@ export default function ShotDetailPage() {
           />
         )}
 
+        {activeTab === "exports" && <ShotExportsTab shotId={shot.id} />}
+
         {activeTab === "settings" && canManage && (
           <ShotSettingsTab shot={shot} artists={artists} onSaved={fetchShot} />
         )}

app/api/ext/exports/[exportId]/retry/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { retryExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/ext/exports/{exportId}/retry (E14) ─────────────────────────────
+//
+// Retry a *_FAILED export from the AE panel: new RenderJob attempt, back to QUEUED.
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { exportId } = await params;
+  let note: string | undefined;
+  try {
+    const body = await req.json();
+    if (typeof body?.note === "string") note = body.note;
+  } catch {
+    // empty body is fine
+  }
+  try {
+    const result = await retryExport(exportId, { type: "USER", note: note ?? "Retry from AE panel" });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/ext/exports/[exportId]/route.ts

@@ -0,0 +1,26 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { getExportDetail } from "@/lib/render-pipeline/exports";
+
+// ── GET /api/ext/exports/{exportId} (E3) ─────────────────────────────────────
+//
+// Export detail incl. render attempts and audit events (validations/QC join in
+// later phases).
+
+export async function GET(
+  req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { exportId } = await params;
+  try {
+    const result = await getExportDetail(exportId);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/ext/exports/latest/route.ts

@@ -0,0 +1,28 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { getLatestExport } from "@/lib/render-pipeline/exports";
+
+// ── GET /api/ext/exports/latest?shotCode=&projectCode= (E2) ──────────────────
+//
+// Latest export + status for the AE panel status header. Returns
+// { "export": null } when the shot has never been exported.
+
+export async function GET(req: NextRequest) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { searchParams } = new URL(req.url);
+  const shotCode = searchParams.get("shotCode")?.trim();
+  const projectCode = searchParams.get("projectCode")?.trim();
+  if (!shotCode) {
+    return NextResponse.json({ error: "shotCode query param is required" }, { status: 400 });
+  }
+  try {
+    const result = await getLatestExport(shotCode, projectCode);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/ext/exports/route.ts

@@ -0,0 +1,47 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { createExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/ext/exports (E1 — Queue Export) ────────────────────────────────
+//
+// Body: { manifest: RenderManifest, submittedByEmail?, priority?, force? }
+// The server decides the new version number, updates Shot.shotVersion/exrOutput,
+// supersedes older non-terminal exports, and creates Export(QUEUED) + RenderJob.
+
+export async function POST(req: NextRequest) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  let body: {
+    manifest?: unknown;
+    submittedByEmail?: string;
+    priority?: number;
+    force?: boolean;
+    vfxScope?: string | null;
+    submissionNote?: string | null;
+  };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.manifest) {
+    return NextResponse.json({ error: "manifest is required" }, { status: 400 });
+  }
+  try {
+    const result = await createExport({
+      manifest: body.manifest,
+      submittedByEmail: body.submittedByEmail ?? null,
+      priority: typeof body.priority === "number" ? body.priority : undefined,
+      force: body.force === true,
+      // undefined inherits the shot's previous export values
+      vfxScope: body.vfxScope,
+      submissionNote: body.submissionNote,
+    });
+    return NextResponse.json(result, { status: 201 });
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/[jobId]/artifact-presign/route.ts

@@ -0,0 +1,57 @@
+import { NextRequest, NextResponse } from "next/server";
+import { randomUUID } from "crypto";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse, PipelineError } from "@/lib/render-pipeline/errors";
+import { db } from "@/lib/db";
+import { generateHetznerPresignedUploadUrl, sanitizeFileName } from "@/lib/storage";
+
+// ── POST /api/ext/render/jobs/{jobId}/artifact-presign (E20) ─────────────────
+//
+// Presigned upload URL for worker artifacts. Kinds map to the existing object
+// storage folder layout: preview → videos/, thumbnail → image/,
+// metadata/log → renders/.
+
+const KIND_FOLDERS: Record<string, string> = {
+  preview: "videos",
+  thumbnail: "image",
+  metadata: "renders",
+  log: "renders",
+};
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { jobId } = await params;
+  let body: { machineId?: string; kind?: string; fileName?: string; contentType?: string };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  try {
+    if (!body.machineId) throw new PipelineError(400, "machineId is required");
+    if (!body.fileName) throw new PipelineError(400, "fileName is required");
+    if (!body.contentType) throw new PipelineError(400, "contentType is required");
+    const folder = KIND_FOLDERS[body.kind ?? ""];
+    if (!folder) {
+      throw new PipelineError(422, `kind must be one of: ${Object.keys(KIND_FOLDERS).join(", ")}`);
+    }
+
+    const job = await db.renderJob.findUnique({ where: { id: jobId }, select: { machineId: true } });
+    if (!job) throw new PipelineError(404, "Render job not found");
+    if (job.machineId !== body.machineId) {
+      throw new PipelineError(409, "Job is not held by this machine (lease reassigned?)");
+    }
+
+    const key = `${folder}/${randomUUID()}-${sanitizeFileName(body.fileName)}`;
+    const presignedUrl = await generateHetznerPresignedUploadUrl(key, body.contentType);
+    return NextResponse.json({ presignedUrl, key, url: `/api/files/${key}` });
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/[jobId]/complete-render/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { completeRender } from "@/lib/render-pipeline/jobs";
+
+// ── POST /api/ext/render/jobs/{jobId}/complete-render (E11) ──────────────────
+//
+// aerender finished with exit 0. Phase 2 interim: Export goes to a provisional
+// READY_FOR_QC; Phase 3 inserts VALIDATING between (§17.3).
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { jobId } = await params;
+  let body: {
+    machineId?: string;
+    renderSeconds?: number;
+    logFileKey?: string;
+    logTail?: string;
+    exrFileCount?: number;
+    exrTotalBytes?: number;
+  };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.machineId) {
+    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
+  }
+  try {
+    const result = await completeRender(jobId, body.machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/[jobId]/fail/route.ts

@@ -0,0 +1,43 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { reportFail } from "@/lib/render-pipeline/jobs";
+
+// ── POST /api/ext/render/jobs/{jobId}/fail (E10) ─────────────────────────────
+//
+// Failure report. If retryable and attempts remain the server auto-creates the
+// next attempt and returns autoRequeued: true.
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { jobId } = await params;
+  let body: {
+    machineId?: string;
+    stage?: string;
+    exitCode?: number;
+    errorMessage?: string;
+    logTail?: string;
+    logFileKey?: string;
+    retryable?: boolean;
+  };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.machineId) {
+    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
+  }
+  try {
+    const result = await reportFail(jobId, body.machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/[jobId]/finalize/route.ts

@@ -0,0 +1,38 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { finalizePreview, type FinalizeInput } from "@/lib/render-pipeline/preview";
+
+// ── POST /api/ext/render/jobs/{jobId}/finalize (E13) ─────────────────────────
+//
+// Preview artifacts uploaded → register the review MP4 as an internal-only
+// Version and move the Export to READY_FOR_QC. Never shares to the client
+// portal and never changes task/shot status (§10.0).
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { jobId } = await params;
+
+  let body: FinalizeInput & { machineId?: string };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.machineId) {
+    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
+  }
+
+  try {
+    const result = await finalizePreview(jobId, body.machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/[jobId]/progress/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { reportProgress } from "@/lib/render-pipeline/jobs";
+
+// ── PATCH /api/ext/render/jobs/{jobId}/progress (E9) ─────────────────────────
+//
+// Progress/ETA report; renews the job lease. Response carries cancelRequested
+// so a worker learns about cancellation without any server→worker connection.
+
+export async function PATCH(
+  req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { jobId } = await params;
+  let body: {
+    machineId?: string;
+    progress?: number;
+    currentFrame?: number;
+    totalFrames?: number;
+    etaSeconds?: number;
+    logTail?: string;
+  };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.machineId) {
+    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
+  }
+  try {
+    const result = await reportProgress(jobId, body.machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/render/jobs/claim/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { claimNextJob } from "@/lib/render-pipeline/jobs";
+
+// ── POST /api/ext/render/jobs/claim (E8) ─────────────────────────────────────
+//
+// Atomically claim the next queued job (FOR UPDATE SKIP LOCKED). Enforces
+// machine availability windows / Render Now / urgent priority server-side
+// (§7.10). 204 when nothing is claimable.
+
+export async function POST(req: NextRequest) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  let body: { machineId?: string; types?: string[] };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  if (!body.machineId) {
+    return NextResponse.json({ error: "machineId is required" }, { status: 400 });
+  }
+  try {
+    const result = await claimNextJob(body.machineId, body.types);
+    if (!result) return new NextResponse(null, { status: 204 });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/workers/[machineId]/heartbeat/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { recordHeartbeat } from "@/lib/render-pipeline/machines";
+
+// ── POST /api/ext/workers/{machineId}/heartbeat (E7) ─────────────────────────
+//
+// Heartbeat + the server→worker command channel: cancellation piggybacks on
+// the response (`commands: [{ type: "CANCEL_JOB", jobId }]`) so no server→
+// worker connection is ever needed.
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ machineId: string }> }
+) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  const { machineId } = await params;
+  let body: { cpuPercent?: number; memPercent?: number; diskFreeGb?: number; currentJobId?: string | null } = {};
+  try {
+    body = await req.json();
+  } catch {
+    // heartbeat with empty body is fine
+  }
+  try {
+    const result = await recordHeartbeat(machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/ext/workers/register/route.ts

@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from "next/server";
+import { isExtAuthorized } from "@/lib/render-pipeline/ext-auth";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { registerMachine } from "@/lib/render-pipeline/machines";
+
+// ── POST /api/ext/workers/register (E6) ──────────────────────────────────────
+//
+// Idempotent register/upsert on machine name. Returns the server-supplied
+// worker config (SystemConfig) so fleet tuning never touches worker installs.
+
+export async function POST(req: NextRequest) {
+  if (!isExtAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  let body: {
+    name?: string;
+    hostname?: string;
+    workerVersion?: string;
+    aeVersion?: string;
+    capabilities?: unknown;
+  };
+  try {
+    body = await req.json();
+  } catch {
+    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
+  }
+  try {
+    const result = await registerMachine(body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body: errBody, status } = toErrorResponse(err);
+    return NextResponse.json(errBody, { status });
+  }
+}

app/api/machines/[machineId]/route.ts

@@ -0,0 +1,41 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse, PipelineError } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser, requirePipelineAdmin } from "@/lib/render-pipeline/session-auth";
+import { updateMachine, type MachineAvailability } from "@/lib/render-pipeline/machines";
+
+// ── PATCH /api/machines/{machineId} ──────────────────────────────────────────
+//
+// Body (all optional):
+//   enabled: boolean          — admin kill-switch (admin/producer/supervisor)
+//   availability: {...}|null  — §7.10 schedule config (admin/producer/supervisor)
+//   renderNowHours: number|0  — "Render Now" override (any studio user);
+//                               0 or null clears it
+
+export async function PATCH(
+  req: NextRequest,
+  { params }: { params: Promise<{ machineId: string }> }
+) {
+  try {
+    const { machineId } = await params;
+    let body: { enabled?: boolean; availability?: MachineAvailability | null; renderNowHours?: number | null };
+    try {
+      body = await req.json();
+    } catch {
+      throw new PipelineError(400, "Invalid JSON");
+    }
+
+    // Render Now is available to every studio user (§7.10); enable/disable and
+    // availability windows are admin-level controls.
+    if (body.enabled !== undefined || body.availability !== undefined) {
+      await requirePipelineAdmin();
+    } else {
+      await requirePipelineUser();
+    }
+
+    const result = await updateMachine(machineId, body);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/machines/route.ts

@@ -0,0 +1,20 @@
+import { NextResponse } from "next/server";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { listMachines } from "@/lib/render-pipeline/machines";
+
+// ── GET /api/machines (E21) ──────────────────────────────────────────────────
+//
+// Machine list for the Machine Monitoring page: derived ONLINE/OFFLINE status,
+// latest heartbeat stats, current job.
+
+export async function GET() {
+  try {
+    await requirePipelineUser();
+    const machines = await listMachines();
+    return NextResponse.json({ machines });
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/exports/[exportId]/cancel/route.ts

@@ -0,0 +1,21 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { cancelExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/render/exports/{exportId}/cancel (E15 / T18) ───────────────────
+
+export async function POST(
+  _req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  try {
+    const user = await requirePipelineUser();
+    const { exportId } = await params;
+    const result = await cancelExport(exportId, { type: "USER", id: user.id, note: "Cancelled from web UI" });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/exports/[exportId]/mark-done/route.ts

@@ -0,0 +1,31 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineAdmin } from "@/lib/render-pipeline/session-auth";
+import { markExportDoneManually } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/render/exports/{exportId}/mark-done ────────────────────────────
+//
+// Phase 1 stopgap (§17.1): lets the studio keep using the old manual render
+// path while the queue is validated. Remove once workers render for real.
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  try {
+    const user = await requirePipelineAdmin();
+    const { exportId } = await params;
+    let note: string | undefined;
+    try {
+      const body = await req.json();
+      if (typeof body?.note === "string") note = body.note;
+    } catch {
+      // empty body is fine
+    }
+    const result = await markExportDoneManually(exportId, user.id, note);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/exports/[exportId]/retry/route.ts

@@ -0,0 +1,21 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { retryExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/render/exports/{exportId}/retry (E15) ──────────────────────────
+
+export async function POST(
+  _req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  try {
+    const user = await requirePipelineUser();
+    const { exportId } = await params;
+    const result = await retryExport(exportId, { type: "USER", id: user.id, note: "Retry from web UI" });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/exports/[exportId]/route.ts

@@ -0,0 +1,23 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { getExportDetail } from "@/lib/render-pipeline/exports";
+
+// ── GET /api/render/exports/{exportId} ───────────────────────────────────────
+//
+// Export detail for the web Export page (internal mirror of E3).
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ exportId: string }> }
+) {
+  try {
+    await requirePipelineUser();
+    const { exportId } = await params;
+    const result = await getExportDetail(exportId);
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/jobs/[jobId]/cancel/route.ts

@@ -0,0 +1,24 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse, PipelineError } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { getJobDetail } from "@/lib/render-pipeline/jobs";
+import { cancelExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/render/jobs/{jobId}/cancel (E15 / T18) ─────────────────────────
+
+export async function POST(
+  _req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  try {
+    const user = await requirePipelineUser();
+    const { jobId } = await params;
+    const job = await getJobDetail(jobId);
+    if (!job.exportId) throw new PipelineError(422, "Job has no export to cancel");
+    const result = await cancelExport(job.exportId, { type: "USER", id: user.id, note: "Cancelled from web UI" });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/jobs/[jobId]/retry/route.ts

@@ -0,0 +1,26 @@
+import { NextRequest, NextResponse } from "next/server";
+import { toErrorResponse, PipelineError } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { getJobDetail } from "@/lib/render-pipeline/jobs";
+import { retryExport } from "@/lib/render-pipeline/exports";
+
+// ── POST /api/render/jobs/{jobId}/retry (E15) ────────────────────────────────
+//
+// Job-level retry resolves to its Export (each retry is a fresh attempt row).
+
+export async function POST(
+  _req: NextRequest,
+  { params }: { params: Promise<{ jobId: string }> }
+) {
+  try {
+    const user = await requirePipelineUser();
+    const { jobId } = await params;
+    const job = await getJobDetail(jobId);
+    if (!job.exportId) throw new PipelineError(422, "Job has no export to retry");
+    const result = await retryExport(job.exportId, { type: "USER", id: user.id, note: "Retry from web UI" });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

app/api/render/queue/route.ts

@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from "next/server";
+import { ExportStatus } from "@prisma/client";
+import { toErrorResponse } from "@/lib/render-pipeline/errors";
+import { requirePipelineUser } from "@/lib/render-pipeline/session-auth";
+import { listExports } from "@/lib/render-pipeline/exports";
+
+// ── GET /api/render/queue (E21) ──────────────────────────────────────────────
+//
+// Exports list for the Render Queue page. Optional filters: projectId,
+// episode, status; standard pagination. Defaults to all statuses so the queue
+// page can show history too — the UI filters live states client-side.
+
+export async function GET(req: NextRequest) {
+  try {
+    await requirePipelineUser();
+    const { searchParams } = new URL(req.url);
+    const status = searchParams.get("status") ?? undefined;
+    const result = await listExports({
+      projectId: searchParams.get("projectId") ?? undefined,
+      episode: searchParams.get("episode") ?? undefined,
+      shotId: searchParams.get("shotId") ?? undefined,
+      status:
+        status && (Object.values(ExportStatus) as string[]).includes(status)
+          ? (status as ExportStatus)
+          : undefined,
+      page: Number(searchParams.get("page") ?? "1") || 1,
+      limit: Number(searchParams.get("limit") ?? "50") || 50,
+    });
+    return NextResponse.json(result);
+  } catch (err) {
+    const { body, status } = toErrorResponse(err);
+    return NextResponse.json(body, { status });
+  }
+}

components/layout/Sidebar.tsx

@@ -21,6 +21,7 @@ import {
   CloudUpload,
   Clapperboard,
   LayoutGrid,
+  Server,
 } from 'lucide-react';
 import { useState } from 'react';
 import { useSession } from 'next-auth/react';
@@ -32,6 +33,7 @@ const navItems = [
   { href: '/shot-status', label: 'Shot Status', icon: BarChart2, hideForClient: true },
   { href: '/playlist', label: 'Playlist', icon: ListVideo, hideForClient: true },
   { href: '/tasks', label: 'My Tasks', icon: ListTodo, hideForClient: true },
+  { href: '/pipeline', label: 'Pipeline', icon: Server, hideForClient: true },
   { href: '/shoot-log', label: 'Shot Log', icon: Clapperboard, supervisorOnly: true },
   { href: '/storyboard', label: 'Storyboard', icon: LayoutGrid, supervisorOnly: true },
   { href: '/schedule', label: 'Schedule', icon: CalendarRange, adminOnly: true },

components/shots/ShotExportsTab.tsx

@@ -0,0 +1,85 @@
+"use client";
+
+import Link from "next/link";
+import { useQuery } from "@tanstack/react-query";
+import { Layers, ExternalLink } from "lucide-react";
+import { cn } from "@/lib/utils";
+import {
+  EXPORT_STATUS_STYLES,
+  statusLabel,
+} from "@/app/(dashboard)/pipeline/status-colors";
+
+interface ExportRow {
+  id: string;
+  versionString: string;
+  status: string;
+  statusChangedAt: string;
+  createdAt: string;
+  outputDir: string;
+  job: {
+    attempt: number;
+    progress: number;
+    machineName: string | null;
+    errorMessage: string | null;
+  } | null;
+}
+
+/**
+ * "Exports" tab on the shot detail page (RenderPipeline2 §13) — the render
+ * pipeline history for this shot, linking into the Export detail page.
+ */
+export function ShotExportsTab({ shotId }: { shotId: string }) {
+  const { data, isLoading } = useQuery({
+    queryKey: ["shot-exports", shotId],
+    queryFn: async () => {
+      const res = await fetch(`/api/render/queue?shotId=${shotId}&limit=100`);
+      if (!res.ok) throw new Error("Failed to load exports");
+      return res.json() as Promise<{ exports: ExportRow[] }>;
+    },
+    refetchInterval: 10000,
+  });
+
+  const exports = data?.exports ?? [];
+
+  if (isLoading) {
+    return <div className="py-10 text-center text-sm text-muted-foreground">Loading exports…</div>;
+  }
+  if (exports.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center py-16 gap-2 text-muted-foreground">
+        <Layers className="h-8 w-8 opacity-30" />
+        <p className="text-sm">No pipeline exports yet — queue one from the After Effects panel.</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-2">
+      {exports.map((e) => (
+        <Link
+          key={e.id}
+          href={`/pipeline/exports/${e.id}`}
+          className="flex items-center gap-4 rounded-lg border border-border bg-card p-4 hover:border-zinc-600 transition-colors"
+        >
+          <span className="font-mono text-sm text-white w-14">{e.versionString}</span>
+          <span
+            className={cn(
+              "rounded-full border px-2 py-0.5 text-xs whitespace-nowrap",
+              EXPORT_STATUS_STYLES[e.status] ?? "bg-zinc-500/15 text-zinc-300 border-zinc-500/30"
+            )}
+          >
+            {statusLabel(e.status)}
+          </span>
+          <span className="flex-1 min-w-0 truncate text-xs text-muted-foreground">
+            {e.job?.machineName ? `${e.job.machineName} · attempt ${e.job.attempt} · ` : ""}
+            {e.outputDir}
+          </span>
+          <span className="text-xs text-muted-foreground whitespace-nowrap">
+            {new Date(e.createdAt).toLocaleDateString()}
+          </span>
+          <ExternalLink className="h-3.5 w-3.5 text-muted-foreground shrink-0" />
+        </Link>
+      ))}
+    </div>
+  );
+}

docker-compose.dev.yml

@@ -0,0 +1,18 @@
+services:
+  postgres:
+    image: postgres:15
+    container_name: vfxreview-dev-db
+
+    environment:
+      POSTGRES_DB: feedback
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+
+    ports:
+      - "5433:5432"
+
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+
+volumes:
+  postgres-data:

instrumentation.ts

@@ -0,0 +1,12 @@
+/**
+ * Next.js server startup hook — starts the render-pipeline reaper
+ * (RenderPipeline2 §7.7, studio decision 18.1-Q8). The reaper requeues or
+ * fails jobs whose lease expired, marks silent machines OFFLINE, and prunes
+ * old heartbeats. This is the only background job the web app runs.
+ */
+export async function register() {
+  if (process.env.NEXT_RUNTIME === "nodejs") {
+    const { startReaper } = await import("@/lib/render-pipeline/reaper");
+    startReaper();
+  }
+}

lib/render-pipeline/config.ts

@@ -0,0 +1,83 @@
+import { db } from "@/lib/db";
+
+/**
+ * Pipeline-wide settings live in the existing SystemConfig key/value table
+ * (RenderPipeline2 §14.1) so the fleet can be tuned without redeploys.
+ */
+export const PIPELINE_CONFIG_DEFAULTS = {
+  "render.pollSeconds": 10,
+  "render.heartbeatSeconds": 30,
+  "render.leaseSeconds": 300,
+  "render.maxAttempts": 3,
+  "render.stallTimeoutSeconds": 600,
+  "render.urgentPriorityThreshold": 20,
+  "render.outputRoot": "//SAN/renders",
+  "validation.sampleEvery": 25,
+  "preview.maxWidth": 1920,
+  // Preview stage (§9): headless AE rebuild of the render with slate/burn-ins
+  "preview.enabled": "true",
+  "preview.templateAep": "X:/shared_projects_2026/UNGO_VFX/production/working_files/UNG_VFXOVERLAY_SLATE_TEMPLATE.aep",
+  "preview.templateComp": "UNG_EXPORT_TEMPLATE",
+  "preview.overlayComp": "UNG_VFX_OVERLAY",
+  "preview.lutComp": "_SHOW LUT",
+  "preview.movTemplate": "4444 Tri",
+  "preview.mp4Template": "REVIEW_PREVIEW",
+  // Essential Property names on the NETFLIX_SLATE layer for the per-submission
+  // fields. If a name is wrong the build logs the template's actual property
+  // names as a warning, so it is a config fix rather than a code change.
+  "preview.slateScopeProp": "Scope",
+  "preview.slateSubmissionProp": "Notes",
+} as const;
+
+export type PipelineConfigKey = keyof typeof PIPELINE_CONFIG_DEFAULTS;
+
+export async function getConfigValue(key: PipelineConfigKey): Promise<string> {
+  const row = await db.systemConfig.findUnique({ where: { key } });
+  return row?.value ?? String(PIPELINE_CONFIG_DEFAULTS[key]);
+}
+
+export async function getConfigNumber(key: PipelineConfigKey): Promise<number> {
+  const raw = await getConfigValue(key);
+  const n = Number(raw);
+  return Number.isFinite(n) ? n : Number(PIPELINE_CONFIG_DEFAULTS[key]);
+}
+
+export async function getConfigBoolean(key: PipelineConfigKey): Promise<boolean> {
+  const raw = (await getConfigValue(key)).trim().toLowerCase();
+  return raw === "true" || raw === "1" || raw === "yes";
+}
+
+/** Preview-stage settings handed to the worker inside the PREVIEW_ONLY manifest. */
+export async function getPreviewConfig() {
+  const [
+    enabled, templateAep, templateComp, overlayComp, lutComp, movTemplate, mp4Template,
+    slateScopeProp, slateSubmissionProp,
+  ] = await Promise.all([
+    getConfigBoolean("preview.enabled"),
+    getConfigValue("preview.templateAep"),
+    getConfigValue("preview.templateComp"),
+    getConfigValue("preview.overlayComp"),
+    getConfigValue("preview.lutComp"),
+    getConfigValue("preview.movTemplate"),
+    getConfigValue("preview.mp4Template"),
+    getConfigValue("preview.slateScopeProp"),
+    getConfigValue("preview.slateSubmissionProp"),
+  ]);
+  return {
+    enabled, templateAep, templateComp, overlayComp, lutComp, movTemplate, mp4Template,
+    slateScopeProp, slateSubmissionProp,
+  };
+}
+
+/** Worker-facing config bundle returned by E6 registration. */
+export async function getWorkerConfig() {
+  const [pollSeconds, heartbeatSeconds, leaseSeconds, maxAttempts, stallTimeoutSeconds] =
+    await Promise.all([
+      getConfigNumber("render.pollSeconds"),
+      getConfigNumber("render.heartbeatSeconds"),
+      getConfigNumber("render.leaseSeconds"),
+      getConfigNumber("render.maxAttempts"),
+      getConfigNumber("render.stallTimeoutSeconds"),
+    ]);
+  return { pollSeconds, heartbeatSeconds, leaseSeconds, maxAttempts, stallTimeoutSeconds };
+}

lib/render-pipeline/errors.ts

@@ -0,0 +1,26 @@
+/**
+ * Typed service-layer error carrying an HTTP status so both auth fronts
+ * (ext API-key routes and internal session routes) map errors identically.
+ */
+export class PipelineError extends Error {
+  status: number;
+  details?: unknown;
+
+  constructor(status: number, message: string, details?: unknown) {
+    super(message);
+    this.name = "PipelineError";
+    this.status = status;
+    this.details = details;
+  }
+}
+
+export function toErrorResponse(err: unknown): { body: { error: string; details?: unknown }; status: number } {
+  if (err instanceof PipelineError) {
+    return {
+      body: { error: err.message, ...(err.details !== undefined ? { details: err.details } : {}) },
+      status: err.status,
+    };
+  }
+  console.error("[render-pipeline]", err);
+  return { body: { error: "Internal server error" }, status: 500 };
+}

lib/render-pipeline/exports.ts

@@ -0,0 +1,504 @@
+import { ExportStatus, Prisma } from "@prisma/client";
+import { db } from "@/lib/db";
+import { PipelineError } from "./errors";
+import { renderManifestSchema, type RenderManifest } from "./manifest";
+import { applyTransition, type TransitionActor } from "./transitions";
+import { getConfigNumber, getConfigValue } from "./config";
+
+/** Statuses in which a shot has a live export in flight (§6.4 E1 409 rule). */
+const ACTIVE_STATUSES: ExportStatus[] = [
+  "QUEUED",
+  "RENDERING",
+  "VALIDATING",
+  "GENERATING_PREVIEW",
+];
+
+/** Non-terminal statuses auto-superseded when a newer Export is queued (T1/T17). */
+const SUPERSEDABLE_STATUSES: ExportStatus[] = [
+  "QUEUED",
+  "RENDER_FAILED",
+  "VALIDATION_FAILED",
+  "PREVIEW_FAILED",
+  "READY_FOR_QC",
+  "QC_FAILED",
+  "READY_FOR_DELIVERY",
+];
+
+const OPEN_JOB_STATUSES = ["QUEUED", "CLAIMED", "RUNNING"] as const;
+
+export function parseVersionString(v: string | null | undefined): number {
+  const m = /^v(\d+)$/i.exec(v?.trim() ?? "");
+  return m ? parseInt(m[1], 10) : 0;
+}
+
+export function formatVersionString(n: number): string {
+  return `v${String(n).padStart(3, "0")}`;
+}
+
+/** `UNG_..._cmp_TT_v003` + 4 → `UNG_..._cmp_TT_v004`; falls back to house convention. */
+function nextExrOutputBase(current: string | null, shotCode: string, versionString: string): string {
+  if (current && /_v\d+$/i.test(current)) return current.replace(/_v\d+$/i, `_${versionString}`);
+  if (current) return `${current}_${versionString}`;
+  return renderOutputBase(shotCode, versionString);
+}
+
+/**
+ * Rendered EXR naming for the pipeline — matches the panel's
+ * "Queue EXR (Review)" convention (`{shotCode}_cmp_TT_{version}`), which is
+ * shot-code based and deliberately excludes the source clip name that
+ * `Shot.exrOutput` carries from the EDL import.
+ */
+function renderOutputBase(shotCode: string, versionString: string): string {
+  return `${shotCode}_cmp_TT_${versionString}`;
+}
+
+export interface CreateExportInput {
+  manifest: unknown;
+  submittedByEmail?: string | null;
+  priority?: number;
+  force?: boolean;
+  /**
+   * Per-submission slate fields. `undefined` inherits the previous export's
+   * value for this shot; `null` or "" explicitly clears it.
+   */
+  vfxScope?: string | null;
+  submissionNote?: string | null;
+}
+
+/**
+ * E1 — Queue Export (§6.4). Transactionally: decides the new version number
+ * (server-side, race-free), updates Shot.shotVersion/exrOutput exactly as the
+ * panel's legacy PATCH did, supersedes older non-terminal exports, creates
+ * Export(QUEUED) + RenderJob attempt 1 with the manifest snapshot.
+ */
+export async function createExport(input: CreateExportInput) {
+  const parsed = renderManifestSchema.safeParse(input.manifest);
+  if (!parsed.success) {
+    throw new PipelineError(422, "Manifest validation error", parsed.error.issues);
+  }
+  const manifest = parsed.data;
+
+  const shot = await db.shot.findUnique({
+    where: { id: manifest.shotId },
+    include: {
+      project: { select: { id: true, code: true, showId: true } },
+      tasks: { where: { type: "COMP" }, orderBy: { sortOrder: "asc" }, take: 1, select: { id: true } },
+    },
+  });
+  if (!shot) throw new PipelineError(404, `Shot not found: ${manifest.shotId}`);
+
+  // Cross-checks (§6.2): manifest vs DB truth
+  if (shot.shotCode !== manifest.shotCode) {
+    throw new PipelineError(422, `Manifest shotCode "${manifest.shotCode}" does not match shot ${shot.id} ("${shot.shotCode}")`);
+  }
+  if (shot.project.code !== manifest.projectCode) {
+    throw new PipelineError(422, `Manifest projectCode "${manifest.projectCode}" does not match shot's project ("${shot.project.code}")`);
+  }
+  // A 0/0 shot range means "never imported", not a real single-frame shot at 0
+  const shotRangeKnown =
+    shot.frameStart != null && shot.frameEnd != null && !(shot.frameStart === 0 && shot.frameEnd === 0);
+  if (
+    !input.force &&
+    shotRangeKnown &&
+    (shot.frameStart !== manifest.frameStart || shot.frameEnd !== manifest.frameEnd)
+  ) {
+    throw new PipelineError(422, `Manifest frame range ${manifest.frameStart}-${manifest.frameEnd} does not match shot record ${shot.frameStart}-${shot.frameEnd} (pass force to override)`);
+  }
+
+  const activeExport = await db.export.findFirst({
+    where: { shotId: shot.id, status: { in: ACTIVE_STATUSES } },
+    select: { id: true, status: true, versionString: true },
+  });
+  if (activeExport && !input.force) {
+    throw new PipelineError(
+      409,
+      `An active export (${activeExport.versionString}, ${activeExport.status}) already exists for this shot — pass force to supersede it`,
+      { activeExportId: activeExport.id }
+    );
+  }
+
+  const submittedBy = input.submittedByEmail
+    ? await db.user.findUnique({ where: { email: input.submittedByEmail }, select: { id: true, name: true } })
+    : null;
+
+  const [maxAttempts, outputRoot] = await Promise.all([
+    getConfigNumber("render.maxAttempts"),
+    getConfigValue("render.outputRoot"),
+  ]);
+
+  // Retry loop: @@unique([shotId, versionNumber]) guards the version-increment
+  // race between two concurrent E1 calls; loser recomputes and retries.
+  for (let tryNo = 0; tryNo < 3; tryNo++) {
+    try {
+      return await db.$transaction(async (tx) => {
+        const latest = await tx.export.aggregate({
+          where: { shotId: shot.id },
+          _max: { versionNumber: true },
+        });
+        const freshShot = await tx.shot.findUniqueOrThrow({
+          where: { id: shot.id },
+          select: { shotVersion: true, exrOutput: true },
+        });
+        // Slate fields carry forward from the shot's previous submission
+        // unless the caller supplies new ones.
+        const previous = await tx.export.findFirst({
+          where: { shotId: shot.id },
+          orderBy: { versionNumber: "desc" },
+          select: { vfxScope: true, submissionNote: true },
+        });
+        const vfxScope = input.vfxScope !== undefined ? input.vfxScope : (previous?.vfxScope ?? null);
+        const submissionNote =
+          input.submissionNote !== undefined ? input.submissionNote : (previous?.submissionNote ?? null);
+        const versionNumber =
+          Math.max(latest._max.versionNumber ?? 0, parseVersionString(freshShot.shotVersion)) + 1;
+        const versionString = formatVersionString(versionNumber);
+        const exrBase = nextExrOutputBase(freshShot.exrOutput, shot.shotCode, versionString);
+
+        const outputDir =
+          manifest.outputDir === "auto"
+            ? [outputRoot, shot.project.code, ...(shot.episode ? [shot.episode] : []), shot.shotCode, versionString].join("/")
+            : manifest.outputDir;
+        const outputPattern =
+          manifest.outputPattern === "auto"
+            ? `${renderOutputBase(shot.shotCode, versionString)}.[#####].exr`
+            : manifest.outputPattern;
+
+        const resolvedManifest: RenderManifest = { ...manifest, outputDir, outputPattern };
+
+        // Supersede older non-terminal exports (T1/T17); cancel their open jobs.
+        const toSupersede = await tx.export.findMany({
+          where: {
+            shotId: shot.id,
+            status: { in: input.force ? [...SUPERSEDABLE_STATUSES, ...ACTIVE_STATUSES] : SUPERSEDABLE_STATUSES },
+          },
+          select: { id: true, status: true },
+        });
+
+        const created = await tx.export.create({
+          data: {
+            shotId: shot.id,
+            projectId: shot.project.id,
+            taskId: shot.tasks[0]?.id ?? null,
+            versionNumber,
+            versionString,
+            status: "QUEUED",
+            aepPath: manifest.aepPath,
+            compName: manifest.compName,
+            rendererType: manifest.rendererType,
+            outputDir,
+            outputPattern,
+            frameStart: manifest.frameStart,
+            frameEnd: manifest.frameEnd,
+            fps: manifest.fps,
+            width: manifest.width,
+            height: manifest.height,
+            colorspace: manifest.expected?.colorspace ?? null,
+            vfxScope,
+            submissionNote,
+            submittedById: submittedBy?.id ?? null,
+            submittedByName: submittedBy?.name ?? input.submittedByEmail ?? null,
+          },
+        });
+
+        for (const old of toSupersede) {
+          await tx.renderJob.updateMany({
+            where: { exportId: old.id, status: { in: [...OPEN_JOB_STATUSES] } },
+            data: { status: "CANCELLED", finishedAt: new Date(), errorMessage: `Superseded by export ${created.id} (${versionString})` },
+          });
+          await applyTransition(
+            tx,
+            old,
+            "SUPERSEDED",
+            { type: "SYSTEM", note: `Superseded by ${versionString}` },
+            { supersededById: created.id }
+          );
+        }
+
+        const renderJob = await tx.renderJob.create({
+          data: {
+            type: "AE_RENDER",
+            exportId: created.id,
+            attempt: 1,
+            maxAttempts,
+            priority: input.priority ?? 50,
+            manifest: resolvedManifest as unknown as Prisma.InputJsonValue,
+          },
+        });
+
+        await tx.exportEvent.create({
+          data: {
+            exportId: created.id,
+            fromStatus: null,
+            toStatus: "QUEUED",
+            actorType: "USER",
+            actorId: submittedBy?.id ?? null,
+            note: `Queue Export ${versionString}${input.force ? " (force)" : ""}`,
+          },
+        });
+
+        // Mirror the legacy panel PATCH: Shot stays the canonical "current version"
+        const updatedShot = await tx.shot.update({
+          where: { id: shot.id },
+          data: { shotVersion: versionString, exrOutput: exrBase },
+          select: { id: true, shotVersion: true, exrOutput: true },
+        });
+
+        return {
+          export: {
+            id: created.id,
+            shotCode: shot.shotCode,
+            versionNumber,
+            versionString,
+            status: created.status,
+            outputDir,
+            outputPattern,
+            vfxScope,
+            submissionNote,
+          },
+          renderJob: { id: renderJob.id, attempt: renderJob.attempt, priority: renderJob.priority },
+          shot: updatedShot,
+          superseded: toSupersede.map((s) => s.id),
+        };
+      });
+    } catch (err) {
+      if (err instanceof Prisma.PrismaClientKnownRequestError && err.code === "P2002" && tryNo < 2) {
+        continue; // concurrent E1 won the version — recompute
+      }
+      throw err;
+    }
+  }
+  throw new PipelineError(409, "Could not allocate a version number after retries");
+}
+
+function serializeExport<T extends { exrTotalBytes: bigint | null }>(e: T) {
+  return { ...e, exrTotalBytes: e.exrTotalBytes == null ? null : Number(e.exrTotalBytes) };
+}
+
+/** E2 — latest export + status for the AE panel header (§6.4). */
+export async function getLatestExport(shotCode: string, projectCode?: string | null) {
+  const shot = await db.shot.findFirst({
+    where: { shotCode, ...(projectCode ? { project: { code: projectCode } } : {}) },
+    select: { id: true },
+  });
+  if (!shot) throw new PipelineError(404, "Shot not found");
+
+  const exp = await db.export.findFirst({
+    where: { shotId: shot.id },
+    orderBy: { versionNumber: "desc" },
+    include: {
+      renderJobs: {
+        orderBy: { attempt: "desc" },
+        take: 1,
+        include: { machine: { select: { name: true } } },
+      },
+    },
+  });
+  if (!exp) return { export: null };
+
+  const job = exp.renderJobs[0] ?? null;
+  return {
+    export: {
+      id: exp.id,
+      versionNumber: exp.versionNumber,
+      versionString: exp.versionString,
+      status: exp.status,
+      statusChangedAt: exp.statusChangedAt,
+      outputDir: exp.outputDir,
+      outputPattern: exp.outputPattern,
+      // Panel prefills its slate fields from these
+      vfxScope: exp.vfxScope,
+      submissionNote: exp.submissionNote,
+      renderJob: job
+        ? {
+            id: job.id,
+            attempt: job.attempt,
+            status: job.status,
+            progress: job.progress,
+            currentFrame: job.currentFrame,
+            totalFrames: job.totalFrames,
+            etaSeconds: job.etaSeconds,
+            errorMessage: job.errorMessage,
+            machineName: job.machine?.name ?? null,
+          }
+        : null,
+      previewUrl: exp.previewMovKey ? `/api/files/${exp.previewMovKey}` : null,
+      thumbnailUrl: exp.thumbnailKey ? `/api/files/${exp.thumbnailKey}` : null,
+    },
+  };
+}
+
+/** E3 — export detail incl. attempts and audit events. */
+export async function getExportDetail(exportId: string) {
+  const exp = await db.export.findUnique({
+    where: { id: exportId },
+    include: {
+      shot: { select: { id: true, shotCode: true, episode: true, project: { select: { id: true, name: true, code: true } } } },
+      renderJobs: {
+        orderBy: { attempt: "asc" },
+        include: { machine: { select: { id: true, name: true } } },
+      },
+      events: { orderBy: { createdAt: "asc" } },
+    },
+  });
+  if (!exp) throw new PipelineError(404, "Export not found");
+  return { export: serializeExport(exp) };
+}
+
+/**
+ * E14 / E15 — retry a failed export: new RenderJob attempt, back to QUEUED.
+ * PREVIEW_FAILED is routed to the preview-only retry (T11) so validated EXRs
+ * are never re-rendered just to rebuild a slate.
+ */
+export async function retryExport(exportId: string, actor: TransitionActor) {
+  const current = await db.export.findUnique({ where: { id: exportId }, select: { status: true } });
+  if (!current) throw new PipelineError(404, "Export not found");
+  if (current.status === "PREVIEW_FAILED") {
+    const { retryPreview } = await import("./preview");
+    return retryPreview(exportId, actor.id ?? undefined);
+  }
+
+  return db.$transaction(async (tx) => {
+    const exp = await tx.export.findUnique({
+      where: { id: exportId },
+      include: { renderJobs: { orderBy: { attempt: "desc" }, take: 1 } },
+    });
+    if (!exp) throw new PipelineError(404, "Export not found");
+    if (!["RENDER_FAILED", "VALIDATION_FAILED"].includes(exp.status)) {
+      throw new PipelineError(409, `Export is ${exp.status} — only RENDER_FAILED, VALIDATION_FAILED or PREVIEW_FAILED exports can be retried`);
+    }
+    const last = exp.renderJobs[0];
+    if (!last) throw new PipelineError(500, "Export has no render jobs");
+
+    const job = await tx.renderJob.create({
+      data: {
+        type: last.type,
+        exportId: exp.id,
+        attempt: last.attempt + 1,
+        maxAttempts: last.maxAttempts,
+        priority: last.priority,
+        manifest: last.manifest as Prisma.InputJsonValue,
+      },
+    });
+    const updated = await applyTransition(tx, exp, "QUEUED", {
+      ...actor,
+      note: actor.note ?? `Retry (attempt ${job.attempt})`,
+    });
+    return { export: { id: updated.id, status: updated.status }, renderJob: { id: job.id, attempt: job.attempt } };
+  });
+}
+
+/** E15 / T18 — cancel a queued or rendering export. Worker learns via heartbeat/progress. */
+export async function cancelExport(exportId: string, actor: TransitionActor) {
+  return db.$transaction(async (tx) => {
+    const exp = await tx.export.findUnique({ where: { id: exportId }, select: { id: true, status: true } });
+    if (!exp) throw new PipelineError(404, "Export not found");
+    if (exp.status === "CANCELLED") return { export: exp, alreadyApplied: true };
+    if (!["QUEUED", "RENDERING"].includes(exp.status)) {
+      throw new PipelineError(409, `Export is ${exp.status} — only QUEUED or RENDERING exports can be cancelled`);
+    }
+    await tx.renderJob.updateMany({
+      where: { exportId: exp.id, status: "QUEUED" },
+      data: { status: "CANCELLED", finishedAt: new Date(), errorMessage: "Cancelled by user" },
+    });
+    // Claimed/running jobs stay marked CANCELLED but keep finishedAt null until
+    // the worker acknowledges (heartbeat CANCEL_JOB command / progress cancelRequested)
+    await tx.renderJob.updateMany({
+      where: { exportId: exp.id, status: { in: ["CLAIMED", "RUNNING"] } },
+      data: { status: "CANCELLED", errorMessage: "Cancelled by user" },
+    });
+    const updated = await applyTransition(tx, exp, "CANCELLED", actor);
+    return { export: { id: updated.id, status: updated.status }, alreadyApplied: false };
+  });
+}
+
+/**
+ * Phase 1 stopgap (§17.1): admin "mark as done manually" so the studio can
+ * keep using the old render path while the queue is validated. Removed once
+ * workers render for real.
+ */
+export async function markExportDoneManually(exportId: string, userId: string, note?: string) {
+  return db.$transaction(async (tx) => {
+    const exp = await tx.export.findUnique({ where: { id: exportId }, select: { id: true, status: true } });
+    if (!exp) throw new PipelineError(404, "Export not found");
+    if (!["QUEUED", "RENDERING"].includes(exp.status)) {
+      throw new PipelineError(409, `Export is ${exp.status} — only QUEUED or RENDERING exports can be marked done`);
+    }
+    await tx.renderJob.updateMany({
+      where: { exportId: exp.id, status: { in: [...OPEN_JOB_STATUSES] } },
+      data: { status: "CANCELLED", finishedAt: new Date(), errorMessage: "Manually marked done (legacy render path)" },
+    });
+    const updated = await applyTransition(tx, exp, "READY_FOR_QC", {
+      type: "USER",
+      id: userId,
+      note: note ?? "Manually marked done (rendered outside the pipeline)",
+    });
+    return { export: { id: updated.id, status: updated.status } };
+  });
+}
+
+export interface ListExportsFilter {
+  projectId?: string;
+  episode?: string;
+  status?: ExportStatus;
+  shotId?: string;
+  page?: number;
+  limit?: number;
+}
+
+/** E21 — paginated export list for the web queue/monitoring pages. */
+export async function listExports(filter: ListExportsFilter) {
+  const page = Math.max(1, filter.page ?? 1);
+  const limit = Math.min(200, Math.max(1, filter.limit ?? 50));
+  const where: Prisma.ExportWhereInput = {
+    ...(filter.projectId ? { projectId: filter.projectId } : {}),
+    ...(filter.status ? { status: filter.status } : {}),
+    ...(filter.shotId ? { shotId: filter.shotId } : {}),
+    ...(filter.episode ? { shot: { episode: filter.episode } } : {}),
+  };
+  const [total, rows] = await Promise.all([
+    db.export.count({ where }),
+    db.export.findMany({
+      where,
+      orderBy: { createdAt: "desc" },
+      skip: (page - 1) * limit,
+      take: limit,
+      include: {
+        shot: { select: { shotCode: true, episode: true, project: { select: { name: true, code: true } } } },
+        renderJobs: {
+          orderBy: { attempt: "desc" },
+          take: 1,
+          include: { machine: { select: { name: true } } },
+        },
+      },
+    }),
+  ]);
+  return {
+    pagination: { page, limit, total, pages: Math.ceil(total / limit) },
+    exports: rows.map((e) => ({
+      id: e.id,
+      shotCode: e.shot.shotCode,
+      episode: e.shot.episode,
+      projectName: e.shot.project.name,
+      projectCode: e.shot.project.code,
+      versionString: e.versionString,
+      status: e.status,
+      statusChangedAt: e.statusChangedAt,
+      createdAt: e.createdAt,
+      outputDir: e.outputDir,
+      job: e.renderJobs[0]
+        ? {
+            id: e.renderJobs[0].id,
+            attempt: e.renderJobs[0].attempt,
+            status: e.renderJobs[0].status,
+            progress: e.renderJobs[0].progress,
+            currentFrame: e.renderJobs[0].currentFrame,
+            totalFrames: e.renderJobs[0].totalFrames,
+            etaSeconds: e.renderJobs[0].etaSeconds,
+            priority: e.renderJobs[0].priority,
+            machineName: e.renderJobs[0].machine?.name ?? null,
+            errorMessage: e.renderJobs[0].errorMessage,
+          }
+        : null,
+    })),
+  };
+}

lib/render-pipeline/ext-auth.ts

@@ -0,0 +1,14 @@
+import { NextRequest } from "next/server";
+
+/**
+ * Shared API-key auth for /api/ext/* pipeline routes — same contract as the
+ * existing ext endpoints (Authorization: Bearer <key> or X-Api-Key header).
+ * One shared API_SECRET_KEY for now (studio decision 18.1-Q7).
+ */
+export function isExtAuthorized(req: NextRequest): boolean {
+  const apiKey = process.env.API_SECRET_KEY;
+  if (!apiKey) return false;
+  const authHeader = req.headers.get("authorization") ?? "";
+  if (authHeader.startsWith("Bearer ")) return authHeader.slice(7) === apiKey;
+  return (req.headers.get("x-api-key") ?? "") === apiKey;
+}

lib/render-pipeline/jobs.ts

@@ -0,0 +1,317 @@
+import { Prisma, RenderJobType } from "@prisma/client";
+import { db } from "@/lib/db";
+import { PipelineError } from "./errors";
+import { applyTransition } from "./transitions";
+import { getConfigBoolean, getConfigNumber } from "./config";
+import { machineCanClaim } from "./machines";
+import { reapExpiredLeases } from "./reaper";
+import { buildPreviewManifest, createPreviewJob } from "./preview";
+
+const JOB_TYPES: RenderJobType[] = ["AE_RENDER", "PREVIEW_ONLY", "DELIVERY_BUILD"];
+
+/**
+ * E8 — atomically claim the next queued job (§6.4). `FOR UPDATE SKIP LOCKED`
+ * makes double-claims impossible under concurrent workers. All scheduling
+ * policy (availability windows, Render Now, urgent priority) is enforced
+ * here server-side — workers poll dumbly (§7.10).
+ */
+export async function claimNextJob(machineId: string, types?: string[]) {
+  const machine = await db.machine.findUnique({ where: { id: machineId } });
+  if (!machine) throw new PipelineError(404, "Machine not found — register first (POST /api/ext/workers/register)");
+
+  // Defensive sweep on each claim (studio decision 18.1-Q8)
+  await reapExpiredLeases().catch((err) => console.error("[render-pipeline] claim-time reap failed", err));
+
+  const claimTypes = (types?.length ? types : ["AE_RENDER", "PREVIEW_ONLY", "DELIVERY_BUILD"]).filter(
+    (t): t is RenderJobType => (JOB_TYPES as string[]).includes(t)
+  );
+  if (claimTypes.length === 0) throw new PipelineError(422, "No valid job types requested");
+
+  const gate = machineCanClaim(machine, new Date());
+  if (gate === "none") return null;
+
+  const [leaseSeconds, urgentThreshold] = await Promise.all([
+    getConfigNumber("render.leaseSeconds"),
+    getConfigNumber("render.urgentPriorityThreshold"),
+  ]);
+
+  const urgentFilter =
+    gate === "urgent-only" ? Prisma.sql`AND priority <= ${urgentThreshold}` : Prisma.empty;
+
+  const claimed = await db.$queryRaw<{ id: string }[]>(Prisma.sql`
+    UPDATE "render_jobs"
+    SET status = 'CLAIMED',
+        "machineId" = ${machineId},
+        "claimedAt" = now(),
+        "leaseExpiresAt" = now() + (${leaseSeconds}::int * interval '1 second'),
+        "updatedAt" = now()
+    WHERE id = (
+      SELECT id FROM "render_jobs"
+      WHERE status = 'QUEUED'
+        AND type::text = ANY(${claimTypes}::text[])
+        ${urgentFilter}
+      ORDER BY priority ASC, "createdAt" ASC
+      FOR UPDATE SKIP LOCKED
+      LIMIT 1
+    )
+    RETURNING id
+  `);
+  if (claimed.length === 0) return null;
+
+  const job = await db.renderJob.findUniqueOrThrow({
+    where: { id: claimed[0].id },
+    include: { export: { select: { id: true, status: true, versionString: true } } },
+  });
+
+  // T2: QUEUED → RENDERING
+  if (job.export && job.export.status === "QUEUED") {
+    await db.$transaction(async (tx) => {
+      await applyTransition(tx, job.export!, "RENDERING", {
+        type: "WORKER",
+        id: machineId,
+        note: `Claimed by ${machine.name} (attempt ${job.attempt})`,
+      });
+    });
+  }
+
+  return {
+    job: {
+      id: job.id,
+      type: job.type,
+      attempt: job.attempt,
+      maxAttempts: job.maxAttempts,
+      priority: job.priority,
+      exportId: job.exportId,
+      deliveryId: job.deliveryId,
+      leaseExpiresAt: job.leaseExpiresAt,
+      manifest: job.manifest,
+    },
+  };
+}
+
+async function getJobForReport(jobId: string, machineId: string) {
+  const job = await db.renderJob.findUnique({
+    where: { id: jobId },
+    include: { export: { select: { id: true, status: true } } },
+  });
+  if (!job) throw new PipelineError(404, "Render job not found");
+  // Zombie-worker guard (§7.4): reports from a machine that doesn't hold the lease are rejected
+  if (job.machineId !== machineId) {
+    throw new PipelineError(409, "Job is not held by this machine (lease reassigned?)");
+  }
+  return job;
+}
+
+/** E9 — progress report; renews the lease. */
+export async function reportProgress(
+  jobId: string,
+  machineId: string,
+  body: { progress?: number; currentFrame?: number; totalFrames?: number; etaSeconds?: number; logTail?: string }
+) {
+  const job = await getJobForReport(jobId, machineId);
+
+  if (job.status === "CANCELLED") {
+    return { ok: true, cancelRequested: true, leaseExpiresAt: job.leaseExpiresAt };
+  }
+  if (["COMPLETED", "FAILED", "EXPIRED"].includes(job.status)) {
+    return { ok: true, alreadyApplied: true, cancelRequested: false, leaseExpiresAt: job.leaseExpiresAt };
+  }
+
+  const leaseSeconds = await getConfigNumber("render.leaseSeconds");
+  const leaseExpiresAt = new Date(Date.now() + leaseSeconds * 1000);
+  await db.renderJob.update({
+    where: { id: job.id },
+    data: {
+      status: "RUNNING",
+      startedAt: job.startedAt ?? new Date(),
+      leaseExpiresAt,
+      ...(body.progress != null ? { progress: Math.min(1, Math.max(0, body.progress)) } : {}),
+      ...(body.currentFrame != null ? { currentFrame: body.currentFrame } : {}),
+      ...(body.totalFrames != null ? { totalFrames: body.totalFrames } : {}),
+      ...(body.etaSeconds != null ? { etaSeconds: body.etaSeconds } : {}),
+      ...(body.logTail != null ? { logTail: body.logTail.slice(-20000) } : {}),
+    },
+  });
+  return { ok: true, leaseExpiresAt, cancelRequested: false };
+}
+
+/** E10 — failure report. Auto-requeues while attempts remain and the error is retryable. */
+export async function reportFail(
+  jobId: string,
+  machineId: string,
+  body: {
+    stage?: string;
+    exitCode?: number;
+    errorMessage?: string;
+    logTail?: string;
+    logFileKey?: string;
+    retryable?: boolean;
+  }
+) {
+  return db.$transaction(async (tx) => {
+    const job = await tx.renderJob.findUnique({
+      where: { id: jobId },
+      include: { export: { select: { id: true, status: true } } },
+    });
+    if (!job) throw new PipelineError(404, "Render job not found");
+    if (job.machineId !== machineId) throw new PipelineError(409, "Job is not held by this machine (lease reassigned?)");
+
+    if (job.status === "FAILED") {
+      return { job: { id: job.id, status: job.status }, export: job.export ? { id: job.export.id, status: job.export.status } : null, autoRequeued: false, alreadyApplied: true };
+    }
+    if (job.status === "CANCELLED") {
+      // worker acknowledging a cancel — record the wind-down, stay CANCELLED
+      await tx.renderJob.update({ where: { id: job.id }, data: { finishedAt: job.finishedAt ?? new Date(), logTail: body.logTail?.slice(-20000) ?? job.logTail } });
+      return { job: { id: job.id, status: "CANCELLED" }, export: job.export ? { id: job.export.id, status: job.export.status } : null, autoRequeued: false, alreadyApplied: true };
+    }
+    if (job.status === "COMPLETED") {
+      throw new PipelineError(409, "Job already reported complete — contradictory fail report rejected");
+    }
+
+    await tx.renderJob.update({
+      where: { id: job.id },
+      data: {
+        status: "FAILED",
+        finishedAt: new Date(),
+        exitCode: body.exitCode ?? null,
+        errorMessage: body.errorMessage?.slice(0, 2000) ?? null,
+        logTail: body.logTail?.slice(-20000) ?? job.logTail,
+        logFileKey: body.logFileKey ?? job.logFileKey,
+      },
+    });
+
+    if (!job.export) {
+      return { job: { id: job.id, status: "FAILED" }, export: null, autoRequeued: false };
+    }
+
+    const retryable = body.retryable !== false;
+    const autoRequeue = retryable && job.attempt < job.maxAttempts;
+    const isPreview = job.type === "PREVIEW_ONLY";
+
+    if (autoRequeue) {
+      const next = await tx.renderJob.create({
+        data: {
+          type: job.type,
+          exportId: job.exportId,
+          attempt: job.attempt + 1,
+          maxAttempts: job.maxAttempts,
+          priority: job.priority,
+          manifest: job.manifest as Prisma.InputJsonValue,
+        },
+      });
+      const note = `${body.stage ?? "RENDER"} failed (${body.errorMessage ?? "no message"}) — auto-requeued as attempt ${next.attempt}`;
+
+      if (isPreview) {
+        // The export stays in GENERATING_PREVIEW across preview attempts —
+        // the EXRs are untouched, only the preview build is repeated.
+        await tx.exportEvent.create({
+          data: {
+            exportId: job.export.id,
+            fromStatus: job.export.status,
+            toStatus: job.export.status,
+            actorType: "SYSTEM",
+            actorId: machineId,
+            note,
+          },
+        });
+        return { job: { id: job.id, status: "FAILED" }, export: { id: job.export.id, status: job.export.status }, autoRequeued: true, nextJob: { id: next.id, attempt: next.attempt } };
+      }
+
+      const exp = await applyTransition(tx, job.export, "QUEUED", { type: "SYSTEM", id: machineId, note });
+      return { job: { id: job.id, status: "FAILED" }, export: { id: exp.id, status: exp.status }, autoRequeued: true, nextJob: { id: next.id, attempt: next.attempt } };
+    }
+
+    const exp = await applyTransition(tx, job.export, isPreview ? "PREVIEW_FAILED" : "RENDER_FAILED", {
+      type: "WORKER",
+      id: machineId,
+      note: `${body.stage ?? "RENDER"} failed: ${body.errorMessage ?? "no message"}${retryable ? " (max attempts reached)" : " (not retryable)"}`,
+    });
+    return { job: { id: job.id, status: "FAILED" }, export: { id: exp.id, status: exp.status }, autoRequeued: false };
+  });
+}
+
+/**
+ * E11 — aerender finished OK.
+ * Phase 2 interim (§17.3): transitions straight to a provisional READY_FOR_QC;
+ * Phase 3 will insert VALIDATING between (see transitions.ts note).
+ */
+export async function completeRender(
+  jobId: string,
+  machineId: string,
+  body: { renderSeconds?: number; logFileKey?: string; logTail?: string; exrFileCount?: number; exrTotalBytes?: number }
+) {
+  return db.$transaction(async (tx) => {
+    const job = await tx.renderJob.findUnique({
+      where: { id: jobId },
+      include: { export: { select: { id: true, status: true } } },
+    });
+    if (!job) throw new PipelineError(404, "Render job not found");
+    if (job.machineId !== machineId) throw new PipelineError(409, "Job is not held by this machine (lease reassigned?)");
+
+    if (job.status === "COMPLETED") {
+      return { job: { id: job.id, status: job.status }, export: job.export ? { id: job.export.id, status: job.export.status } : null, alreadyApplied: true };
+    }
+    if (["FAILED", "CANCELLED", "EXPIRED"].includes(job.status)) {
+      throw new PipelineError(409, `Job is ${job.status} — contradictory complete report rejected`);
+    }
+
+    await tx.renderJob.update({
+      where: { id: job.id },
+      data: {
+        status: "COMPLETED",
+        progress: 1,
+        finishedAt: new Date(),
+        exitCode: 0,
+        logFileKey: body.logFileKey ?? job.logFileKey,
+        logTail: body.logTail?.slice(-20000) ?? job.logTail,
+      },
+    });
+
+    let exportResult: { id: string; status: string } | null = null;
+    let previewJob: { id: string; type: string } | null = null;
+
+    if (job.export) {
+      const exportRow = await tx.export.findUniqueOrThrow({ where: { id: job.export.id } });
+      const stats = {
+        ...(body.exrFileCount != null ? { exrFileCount: body.exrFileCount } : {}),
+        ...(body.exrTotalBytes != null ? { exrTotalBytes: BigInt(Math.round(body.exrTotalBytes)) } : {}),
+      };
+
+      // The EXR render is only the first stage: hand off to the preview stage
+      // (headless AE rebuild → delivery MOV + review MP4) when it is enabled.
+      const previewEnabled = await getConfigBoolean("preview.enabled");
+      if (previewEnabled) {
+        const manifest = await buildPreviewManifest(exportRow);
+        const created = await createPreviewJob(tx, exportRow, manifest, job.maxAttempts, job.priority);
+        previewJob = { id: created.id, type: created.type };
+        const exp = await applyTransition(tx, job.export, "GENERATING_PREVIEW", {
+          type: "WORKER",
+          id: machineId,
+          note: `Render complete in ${body.renderSeconds ?? "?"}s — queued preview build`,
+        }, stats);
+        exportResult = { id: exp.id, status: exp.status };
+      } else {
+        const exp = await applyTransition(tx, job.export, "READY_FOR_QC", {
+          type: "WORKER",
+          id: machineId,
+          note: `Render complete in ${body.renderSeconds ?? "?"}s (preview stage disabled)`,
+        }, stats);
+        exportResult = { id: exp.id, status: exp.status };
+      }
+    }
+    return { job: { id: job.id, status: "COMPLETED" }, export: exportResult, previewJob, alreadyApplied: false };
+  });
+}
+
+/** E15 — cancel a single job from the web UI (delegates to export-level cancel when linked). */
+export async function getJobDetail(jobId: string) {
+  const job = await db.renderJob.findUnique({
+    where: { id: jobId },
+    include: {
+      machine: { select: { id: true, name: true } },
+      export: { include: { shot: { select: { shotCode: true } } } },
+    },
+  });
+  if (!job) throw new PipelineError(404, "Render job not found");
+  return job;
+}

lib/render-pipeline/machines.ts

@@ -0,0 +1,240 @@
+import { Machine, Prisma } from "@prisma/client";
+import { db } from "@/lib/db";
+import { PipelineError } from "./errors";
+import { getWorkerConfig } from "./config";
+
+/**
+ * Machine availability (§7.10):
+ *   ALWAYS   — claims whenever idle (default when availability is null)
+ *   SCHEDULE — claims only inside configured windows
+ *   MANUAL   — never claims unless explicitly triggered
+ * Overrides, in priority order: enabled=false beats everything; renderNowUntil
+ * allows normal claims until it expires; urgent jobs may claim anytime on
+ * machines with allowUrgentAnytime.
+ */
+export interface AvailabilityWindow {
+  days: string[]; // ["mon", ..., "sun"]
+  from: string; // "19:00"
+  to: string; // "08:00" — from > to spans midnight
+}
+
+export interface MachineAvailability {
+  mode?: "ALWAYS" | "SCHEDULE" | "MANUAL";
+  windows?: AvailabilityWindow[];
+  allowUrgentAnytime?: boolean;
+}
+
+const DAY_NAMES = ["sun", "mon", "tue", "wed", "thu", "fri", "sat"];
+
+function parseHm(hm: string): number | null {
+  const m = /^(\d{1,2}):(\d{2})$/.exec(hm);
+  if (!m) return null;
+  const mins = parseInt(m[1], 10) * 60 + parseInt(m[2], 10);
+  return mins >= 0 && mins <= 24 * 60 ? mins : null;
+}
+
+export function isInWindow(windows: AvailabilityWindow[], now: Date): boolean {
+  const day = DAY_NAMES[now.getDay()];
+  const prevDay = DAY_NAMES[(now.getDay() + 6) % 7];
+  const t = now.getHours() * 60 + now.getMinutes();
+
+  for (const w of windows) {
+    const from = parseHm(w.from);
+    const to = parseHm(w.to);
+    if (from == null || to == null || !Array.isArray(w.days)) continue;
+    const days = w.days.map((d) => d.toLowerCase().slice(0, 3));
+    if (from < to) {
+      if (days.includes(day) && t >= from && t < to) return true;
+    } else if (from > to) {
+      // overnight window, e.g. 19:00 → 08:00
+      if (days.includes(day) && t >= from) return true;
+      if (days.includes(prevDay) && t < to) return true;
+    } else {
+      // from === to → full 24 h on listed days
+      if (days.includes(day)) return true;
+    }
+  }
+  return false;
+}
+
+export type ClaimGate = "normal" | "urgent-only" | "none";
+
+export function machineCanClaim(machine: Machine, now: Date): ClaimGate {
+  if (!machine.enabled) return "none";
+  if (machine.renderNowUntil && machine.renderNowUntil > now) return "normal";
+
+  const availability = (machine.availability ?? null) as MachineAvailability | null;
+  const mode = availability?.mode ?? "ALWAYS";
+  const urgent = availability?.allowUrgentAnytime ? ("urgent-only" as const) : ("none" as const);
+
+  switch (mode) {
+    case "ALWAYS":
+      return "normal";
+    case "SCHEDULE":
+      return isInWindow(availability?.windows ?? [], now) ? "normal" : urgent;
+    case "MANUAL":
+      return urgent;
+    default:
+      return "normal";
+  }
+}
+
+/** E6 — idempotent register/upsert on machine name. */
+export async function registerMachine(body: {
+  name?: string;
+  hostname?: string;
+  workerVersion?: string;
+  aeVersion?: string;
+  capabilities?: unknown;
+}) {
+  const name = body.name?.trim();
+  if (!name) throw new PipelineError(422, "name is required");
+  const hostname = body.hostname?.trim() || name;
+
+  const machine = await db.machine.upsert({
+    where: { name },
+    create: {
+      name,
+      hostname,
+      status: "ONLINE",
+      lastSeenAt: new Date(),
+      workerVersion: body.workerVersion ?? null,
+      aeVersion: body.aeVersion ?? null,
+      capabilities: (body.capabilities ?? undefined) as Prisma.InputJsonValue | undefined,
+    },
+    update: {
+      hostname,
+      status: "ONLINE",
+      lastSeenAt: new Date(),
+      workerVersion: body.workerVersion ?? undefined,
+      aeVersion: body.aeVersion ?? undefined,
+      capabilities: (body.capabilities ?? undefined) as Prisma.InputJsonValue | undefined,
+    },
+  });
+
+  return {
+    machine: { id: machine.id, name: machine.name, enabled: machine.enabled },
+    config: await getWorkerConfig(),
+  };
+}
+
+/** E7 — heartbeat; also the server→worker command channel (cancel signals). */
+export async function recordHeartbeat(
+  machineId: string,
+  body: { cpuPercent?: number; memPercent?: number; diskFreeGb?: number; currentJobId?: string | null }
+) {
+  const machine = await db.machine.findUnique({ where: { id: machineId } });
+  if (!machine) throw new PipelineError(404, "Machine not found");
+
+  await db.$transaction([
+    db.machine.update({
+      where: { id: machineId },
+      data: { lastSeenAt: new Date(), status: machine.enabled ? "ONLINE" : "DISABLED" },
+    }),
+    db.workerHeartbeat.create({
+      data: {
+        machineId,
+        cpuPercent: body.cpuPercent ?? null,
+        memPercent: body.memPercent ?? null,
+        diskFreeGb: body.diskFreeGb ?? null,
+        currentJobId: body.currentJobId ?? null,
+      },
+    }),
+  ]);
+
+  // Cancelled-but-unacknowledged jobs held by this machine → CANCEL_JOB commands
+  const cancelled = await db.renderJob.findMany({
+    where: { machineId, status: "CANCELLED", finishedAt: null },
+    select: { id: true },
+  });
+  return {
+    ok: true,
+    commands: cancelled.map((j) => ({ type: "CANCEL_JOB" as const, jobId: j.id })),
+  };
+}
+
+/** Machine list for the monitoring page, with latest heartbeat + current job. */
+export async function listMachines() {
+  const heartbeatSeconds = 30;
+  const machines = await db.machine.findMany({
+    orderBy: { name: "asc" },
+    include: {
+      heartbeats: { orderBy: { createdAt: "desc" }, take: 1 },
+      renderJobs: {
+        where: { status: { in: ["CLAIMED", "RUNNING"] } },
+        take: 1,
+        include: { export: { select: { id: true, versionString: true, shot: { select: { shotCode: true } } } } },
+      },
+    },
+  });
+  const now = Date.now();
+  return machines.map((m) => ({
+    id: m.id,
+    name: m.name,
+    hostname: m.hostname,
+    enabled: m.enabled,
+    // ONLINE = heartbeat within 3× the heartbeat interval (§5.6)
+    status: !m.enabled
+      ? "DISABLED"
+      : m.lastSeenAt && now - m.lastSeenAt.getTime() < heartbeatSeconds * 3 * 1000
+        ? "ONLINE"
+        : "OFFLINE",
+    lastSeenAt: m.lastSeenAt,
+    workerVersion: m.workerVersion,
+    aeVersion: m.aeVersion,
+    capabilities: m.capabilities,
+    availability: m.availability,
+    renderNowUntil: m.renderNowUntil,
+    latestHeartbeat: m.heartbeats[0]
+      ? {
+          createdAt: m.heartbeats[0].createdAt,
+          cpuPercent: m.heartbeats[0].cpuPercent,
+          memPercent: m.heartbeats[0].memPercent,
+          diskFreeGb: m.heartbeats[0].diskFreeGb,
+        }
+      : null,
+    currentJob: m.renderJobs[0]
+      ? {
+          id: m.renderJobs[0].id,
+          exportId: m.renderJobs[0].exportId,
+          shotCode: m.renderJobs[0].export?.shot.shotCode ?? null,
+          versionString: m.renderJobs[0].export?.versionString ?? null,
+          progress: m.renderJobs[0].progress,
+          etaSeconds: m.renderJobs[0].etaSeconds,
+        }
+      : null,
+  }));
+}
+
+export async function updateMachine(
+  machineId: string,
+  patch: { enabled?: boolean; availability?: MachineAvailability | null; renderNowHours?: number | null }
+) {
+  const machine = await db.machine.findUnique({ where: { id: machineId } });
+  if (!machine) throw new PipelineError(404, "Machine not found");
+
+  const data: Prisma.MachineUpdateInput = {};
+  if (patch.enabled !== undefined) {
+    data.enabled = patch.enabled;
+    data.status = patch.enabled ? machine.status === "DISABLED" ? "OFFLINE" : machine.status : "DISABLED";
+  }
+  if (patch.availability !== undefined) {
+    data.availability = patch.availability === null ? Prisma.DbNull : (patch.availability as unknown as Prisma.InputJsonValue);
+  }
+  if (patch.renderNowHours !== undefined) {
+    data.renderNowUntil =
+      patch.renderNowHours === null || patch.renderNowHours <= 0
+        ? null
+        : new Date(Date.now() + patch.renderNowHours * 3600 * 1000);
+  }
+  const updated = await db.machine.update({ where: { id: machineId }, data });
+  return {
+    machine: {
+      id: updated.id,
+      name: updated.name,
+      enabled: updated.enabled,
+      availability: updated.availability,
+      renderNowUntil: updated.renderNowUntil,
+    },
+  };
+}

lib/render-pipeline/manifest.ts

@@ -0,0 +1,52 @@
+import { z } from "zod";
+
+/**
+ * The Render Manifest (RenderPipeline2 §6.2).
+ * Uploaded by the AE panel on Queue Export, snapshotted verbatim into
+ * RenderJob.manifest, handed to the worker on claim.
+ *
+ * `outputDir` / `outputPattern` may be the literal string "auto" — the server
+ * generates them from the shot's exrOutput convention and the NEW version
+ * number it decides (§6.4 E1).
+ */
+export const renderManifestSchema = z
+  .object({
+    manifestVersion: z.number().int().min(1).default(1),
+    projectCode: z.string().min(1),
+    shotCode: z.string().regex(/^[A-Za-z0-9_-]+$/, "shotCode contains invalid characters"),
+    shotId: z.string().min(1),
+    aepPath: z.string().min(1),
+    compName: z.string().min(1),
+    rendererType: z.string().default("aerender"),
+    aeVersionHint: z.string().optional(),
+    outputDir: z.string().min(1),
+    outputPattern: z.string().min(1),
+    outputModuleTemplate: z.string().optional(),
+    renderSettingsTemplate: z.string().optional(),
+    frameStart: z.number().int(),
+    frameEnd: z.number().int(),
+    fps: z.number().positive(),
+    width: z.number().int().positive(),
+    height: z.number().int().positive(),
+    expected: z
+      .object({
+        colorspace: z.string().optional(),
+        bitDepth: z.string().optional(),
+        exrCompression: z.string().optional(),
+        alpha: z.boolean().optional(),
+        timecodeStart: z.string().optional(),
+      })
+      .optional(),
+    preview: z
+      .object({
+        template: z.string().optional(),
+        burnins: z.boolean().optional(),
+      })
+      .optional(),
+  })
+  .refine((m) => m.frameEnd >= m.frameStart, {
+    message: "frameEnd must be >= frameStart",
+    path: ["frameEnd"],
+  });
+
+export type RenderManifest = z.infer<typeof renderManifestSchema>;

lib/render-pipeline/preview.ts

@@ -0,0 +1,295 @@
+import { Prisma } from "@prisma/client";
+import { db } from "@/lib/db";
+import { PipelineError } from "./errors";
+import { applyTransition } from "./transitions";
+import { getConfigNumber, getPreviewConfig } from "./config";
+
+/** Slate date format used by the panel's getDateString (YYYY/MM/DD). */
+function slateDate(d = new Date()): string {
+  const mm = String(d.getMonth() + 1).padStart(2, "0");
+  const dd = String(d.getDate()).padStart(2, "0");
+  return `${d.getFullYear()}/${mm}/${dd}`;
+}
+
+export interface PreviewManifest {
+  stage: "PREVIEW";
+  exportId: string;
+  shotCode: string;
+  versionString: string;
+  outputDir: string;
+  outputPattern: string;
+  frameStart: number;
+  frameEnd: number;
+  fps: number;
+  templateAep: string;
+  templateComp: string;
+  overlayComp: string;
+  lutComp: string;
+  movTemplate: string;
+  mp4Template: string;
+  movOutput: string;
+  mp4Output: string;
+  slateScopeProp: string;
+  slateSubmissionProp: string;
+  slate: {
+    versionName: string;
+    date: string;
+    description: string | null;
+    notes: string | null;
+    shotCode: string;
+    episode: string | null;
+    scene: string | null;
+    vfxScope: string | null;
+    submissionNote: string | null;
+  };
+}
+
+type ExportForPreview = {
+  id: string;
+  shotId: string;
+  versionString: string;
+  outputDir: string;
+  outputPattern: string;
+  frameStart: number;
+  frameEnd: number;
+  fps: number;
+  vfxScope: string | null;
+  submissionNote: string | null;
+};
+
+/**
+ * Builds the PREVIEW_ONLY job manifest (RenderPipeline2 §9): everything the
+ * headless AE build script needs to rebuild the shot around the rendered EXRs
+ * and queue the delivery MOV + review MP4.
+ *
+ * The MOV and MP4 are written beside the EXR sequence, so every artifact for a
+ * version lives in one folder and Phase 5 can package them together.
+ */
+export async function buildPreviewManifest(exportRow: ExportForPreview): Promise<PreviewManifest> {
+  const shot = await db.shot.findUnique({
+    where: { id: exportRow.shotId },
+    select: { shotCode: true, episode: true, scene: true, description: true, notes: true },
+  });
+  if (!shot) throw new PipelineError(404, "Shot not found for export");
+
+  const cfg = await getPreviewConfig();
+  const base = `${shot.shotCode}_cmp_TT_${exportRow.versionString}`;
+
+  return {
+    stage: "PREVIEW",
+    exportId: exportRow.id,
+    shotCode: shot.shotCode,
+    versionString: exportRow.versionString,
+    outputDir: exportRow.outputDir,
+    outputPattern: exportRow.outputPattern,
+    frameStart: exportRow.frameStart,
+    frameEnd: exportRow.frameEnd,
+    fps: exportRow.fps,
+    templateAep: cfg.templateAep,
+    templateComp: cfg.templateComp,
+    overlayComp: cfg.overlayComp,
+    lutComp: cfg.lutComp,
+    movTemplate: cfg.movTemplate,
+    mp4Template: cfg.mp4Template,
+    movOutput: `${exportRow.outputDir}/${base}.mov`,
+    mp4Output: `${exportRow.outputDir}/${base}.mp4`,
+    slateScopeProp: cfg.slateScopeProp,
+    slateSubmissionProp: cfg.slateSubmissionProp,
+    slate: {
+      versionName: base,
+      date: slateDate(),
+      description: shot.description,
+      notes: shot.notes,
+      shotCode: shot.shotCode,
+      episode: shot.episode,
+      scene: shot.scene,
+      vfxScope: exportRow.vfxScope,
+      submissionNote: exportRow.submissionNote,
+    },
+  };
+}
+
+/** Creates the PREVIEW_ONLY job that follows a successful EXR render. */
+export async function createPreviewJob(
+  tx: Prisma.TransactionClient,
+  exportRow: ExportForPreview,
+  manifest: PreviewManifest,
+  maxAttempts: number,
+  priority: number
+) {
+  return tx.renderJob.create({
+    data: {
+      type: "PREVIEW_ONLY",
+      exportId: exportRow.id,
+      attempt: 1,
+      maxAttempts,
+      priority,
+      manifest: manifest as unknown as Prisma.InputJsonValue,
+    },
+  });
+}
+
+export interface FinalizeInput {
+  artifacts?: {
+    deliveryMovPath?: string;
+    previewMovKey?: string;
+    thumbnailKey?: string;
+    metadataKey?: string;
+    logFileKey?: string;
+  };
+  renderStats?: { renderSeconds?: number; previewSeconds?: number };
+  media?: { width?: number; height?: number; frameCount?: number; fps?: number; fileName?: string };
+}
+
+/**
+ * E13 — preview artifacts are done: register the review MP4 as an ordinary
+ * `Version` and move the Export to READY_FOR_QC.
+ *
+ * Pipeline mode (§6.4 / T12): the Version is **never client-visible** and
+ * **no task or shot status is touched**. Delivery QC runs on shots the client
+ * has usually already approved, so a post-approval technical render must not
+ * resurface in the review flow or the client portal.
+ */
+export async function finalizePreview(jobId: string, machineId: string, body: FinalizeInput) {
+  return db.$transaction(async (tx) => {
+    const job = await tx.renderJob.findUnique({
+      where: { id: jobId },
+      include: { export: true },
+    });
+    if (!job) throw new PipelineError(404, "Render job not found");
+    if (job.machineId !== machineId) {
+      throw new PipelineError(409, "Job is not held by this machine (lease reassigned?)");
+    }
+    const exportRow = job.export;
+    if (!exportRow) throw new PipelineError(422, "Job has no export to finalize");
+
+    if (exportRow.status === "READY_FOR_QC" && exportRow.versionId) {
+      return {
+        export: { id: exportRow.id, status: exportRow.status },
+        version: { id: exportRow.versionId },
+        alreadyApplied: true,
+      };
+    }
+
+    const artifacts = body.artifacts ?? {};
+    const media = body.media ?? {};
+
+    await tx.renderJob.update({
+      where: { id: job.id },
+      data: {
+        status: "COMPLETED",
+        progress: 1,
+        finishedAt: new Date(),
+        exitCode: 0,
+        logFileKey: artifacts.logFileKey ?? job.logFileKey,
+      },
+    });
+
+    let versionId: string | null = null;
+    if (artifacts.previewMovKey) {
+      // Version numbering stays monotonic for the task (existing review flows
+      // rely on the newest version having the highest number) while matching
+      // the export version whenever it is ahead.
+      const taskMax = exportRow.taskId
+        ? await tx.version.aggregate({
+            where: { taskId: exportRow.taskId },
+            _max: { versionNumber: true },
+          })
+        : { _max: { versionNumber: null as number | null } };
+      const versionNumber = Math.max((taskMax._max.versionNumber ?? 0) + 1, exportRow.versionNumber);
+
+      if (exportRow.taskId) {
+        await tx.version.updateMany({
+          where: { taskId: exportRow.taskId },
+          data: { isLatest: false },
+        });
+      }
+
+      const version = await tx.version.create({
+        data: {
+          versionNumber,
+          shotId: exportRow.shotId,
+          taskId: exportRow.taskId,
+          artistId: exportRow.submittedById,
+          fileUrl: `/api/files/${artifacts.previewMovKey}`,
+          fileName: media.fileName ?? `${exportRow.versionString}.mp4`,
+          mimeType: "video/mp4",
+          thumbnailUrl: artifacts.thumbnailKey ? `/api/files/${artifacts.thumbnailKey}` : undefined,
+          fps: media.fps ?? exportRow.fps,
+          frameCount: media.frameCount ?? exportRow.frameEnd - exportRow.frameStart + 1,
+          width: media.width ?? exportRow.width,
+          height: media.height ?? exportRow.height,
+          notes: `Pipeline render ${exportRow.versionString} (internal only)`,
+          isLatest: true,
+          isClientVisible: false, // never shared to the client portal (§10.0)
+        },
+      });
+      versionId = version.id;
+    }
+
+    const updated = await applyTransition(
+      tx,
+      exportRow,
+      "READY_FOR_QC",
+      {
+        type: "WORKER",
+        id: machineId,
+        note: `Preview complete in ${body.renderStats?.previewSeconds ?? "?"}s${versionId ? " — review version created" : " — no preview media reported"}`,
+      },
+      {
+        ...(versionId ? { versionId } : {}),
+        ...(artifacts.deliveryMovPath ? { deliveryMovPath: artifacts.deliveryMovPath } : {}),
+        ...(artifacts.previewMovKey ? { previewMovKey: artifacts.previewMovKey } : {}),
+        ...(artifacts.thumbnailKey ? { thumbnailKey: artifacts.thumbnailKey } : {}),
+        ...(artifacts.metadataKey ? { metadataKey: artifacts.metadataKey } : {}),
+      }
+    );
+
+    return {
+      export: { id: updated.id, status: updated.status },
+      version: versionId ? { id: versionId } : null,
+      alreadyApplied: false,
+    };
+  });
+}
+
+/** T11 — retry the preview stage only; validated EXRs are left alone. */
+export async function retryPreview(exportId: string, actorId?: string) {
+  const maxAttempts = await getConfigNumber("render.maxAttempts");
+
+  return db.$transaction(async (tx) => {
+    const exportRow = await tx.export.findUnique({ where: { id: exportId } });
+    if (!exportRow) throw new PipelineError(404, "Export not found");
+    if (exportRow.status !== "PREVIEW_FAILED") {
+      throw new PipelineError(409, `Export is ${exportRow.status} — only PREVIEW_FAILED exports can retry the preview`);
+    }
+
+    const manifest = await buildPreviewManifest(exportRow);
+    const last = await tx.renderJob.findFirst({
+      where: { exportId, type: "PREVIEW_ONLY" },
+      orderBy: { attempt: "desc" },
+    });
+
+    const job = await tx.renderJob.create({
+      data: {
+        type: "PREVIEW_ONLY",
+        exportId,
+        attempt: (last?.attempt ?? 0) + 1,
+        maxAttempts,
+        priority: last?.priority ?? 50,
+        manifest: manifest as unknown as Prisma.InputJsonValue,
+      },
+    });
+
+    const updated = await applyTransition(tx, exportRow, "GENERATING_PREVIEW", {
+      type: "USER",
+      id: actorId,
+      note: `Retry preview (attempt ${job.attempt})`,
+    });
+
+    return {
+      export: { id: updated.id, status: updated.status },
+      renderJob: { id: job.id, attempt: job.attempt },
+    };
+  });
+}

lib/render-pipeline/reaper.ts

@@ -0,0 +1,94 @@
+import { Prisma } from "@prisma/client";
+import { db } from "@/lib/db";
+import { applyTransition } from "./transitions";
+import { getConfigNumber } from "./config";
+
+/**
+ * Server-side reaper (RenderPipeline2 §7.7) — the only background job the web
+ * app gains. Covers worker power loss, BSOD and network partition with no
+ * worker cooperation:
+ *   1. expired leases → job EXPIRED; requeue (T5) or Export → RENDER_FAILED (T4)
+ *   2. silent machines → OFFLINE
+ *   3. prune heartbeats older than 7 days
+ */
+export async function reapExpiredLeases() {
+  const expired = await db.renderJob.findMany({
+    where: { status: { in: ["CLAIMED", "RUNNING"] }, leaseExpiresAt: { lt: new Date() } },
+    include: { export: { select: { id: true, status: true } } },
+  });
+
+  for (const job of expired) {
+    try {
+      await db.$transaction(async (tx) => {
+        // Re-check inside the transaction — the worker may have reported in between
+        const fresh = await tx.renderJob.findUnique({ where: { id: job.id }, select: { status: true, leaseExpiresAt: true } });
+        if (!fresh || !["CLAIMED", "RUNNING"].includes(fresh.status) || !fresh.leaseExpiresAt || fresh.leaseExpiresAt >= new Date()) {
+          return;
+        }
+        await tx.renderJob.update({
+          where: { id: job.id },
+          data: { status: "EXPIRED", finishedAt: new Date(), errorMessage: "Lease expired (worker unreachable)" },
+        });
+        if (!job.export) return;
+
+        if (job.attempt < job.maxAttempts) {
+          const next = await tx.renderJob.create({
+            data: {
+              type: job.type,
+              exportId: job.exportId,
+              attempt: job.attempt + 1,
+              maxAttempts: job.maxAttempts,
+              priority: job.priority,
+              manifest: job.manifest as Prisma.InputJsonValue,
+            },
+          });
+          if (job.export.status === "RENDERING") {
+            await applyTransition(tx, job.export, "QUEUED", {
+              type: "SYSTEM",
+              note: `Lease expired on attempt ${job.attempt} — requeued as attempt ${next.attempt}`,
+            });
+          }
+        } else if (job.export.status === "RENDERING") {
+          await applyTransition(tx, job.export, "RENDER_FAILED", {
+            type: "SYSTEM",
+            note: `Lease expired on attempt ${job.attempt}/${job.maxAttempts} — no retries remain`,
+          });
+        }
+      });
+    } catch (err) {
+      console.error(`[render-pipeline] reaper failed for job ${job.id}`, err);
+    }
+  }
+  return expired.length;
+}
+
+export async function reaperSweep() {
+  const heartbeatSeconds = await getConfigNumber("render.heartbeatSeconds");
+
+  await reapExpiredLeases();
+
+  await db.machine.updateMany({
+    where: {
+      status: "ONLINE",
+      OR: [{ lastSeenAt: null }, { lastSeenAt: { lt: new Date(Date.now() - heartbeatSeconds * 3 * 1000) } }],
+    },
+    data: { status: "OFFLINE" },
+  });
+
+  await db.workerHeartbeat.deleteMany({
+    where: { createdAt: { lt: new Date(Date.now() - 7 * 24 * 3600 * 1000) } },
+  });
+}
+
+const globalForReaper = globalThis as unknown as { renderPipelineReaper?: ReturnType<typeof setInterval> };
+
+/** Started once from instrumentation.ts (Next.js server startup hook). */
+export function startReaper(intervalMs = 60_000) {
+  if (globalForReaper.renderPipelineReaper) return;
+  globalForReaper.renderPipelineReaper = setInterval(() => {
+    reaperSweep().catch((err) => console.error("[render-pipeline] reaper sweep failed", err));
+  }, intervalMs);
+  // Don't hold the process open on shutdown
+  globalForReaper.renderPipelineReaper.unref?.();
+  console.log("[render-pipeline] reaper started (interval", intervalMs, "ms)");
+}

lib/render-pipeline/session-auth.ts

@@ -0,0 +1,22 @@
+import { auth } from "@/auth";
+import { PipelineError } from "./errors";
+
+export type SessionUser = { id: string; role: string; name?: string | null; email?: string | null };
+
+/** Any signed-in studio user (clients never see pipeline pages). */
+export async function requirePipelineUser(): Promise<SessionUser> {
+  const session = await auth();
+  const user = session?.user as (SessionUser & { role?: string }) | undefined;
+  if (!user?.id) throw new PipelineError(401, "Unauthorized");
+  if (user.role === "CLIENT") throw new PipelineError(403, "Forbidden");
+  return user as SessionUser;
+}
+
+/** Admin-level pipeline actions (machine kill-switch, manual mark-done). */
+export async function requirePipelineAdmin(): Promise<SessionUser> {
+  const user = await requirePipelineUser();
+  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(user.role)) {
+    throw new PipelineError(403, "Forbidden — requires admin/producer/supervisor role");
+  }
+  return user;
+}

lib/render-pipeline/transitions.ts

@@ -0,0 +1,77 @@
+import { ExportStatus, Prisma } from "@prisma/client";
+import { PipelineError } from "./errors";
+
+/**
+ * Export lifecycle state machine (RenderPipeline2 §4).
+ * The server is the sole authority on state; workers *request* transitions.
+ *
+ * NOTE (Phase 2 interim): RENDERING → READY_FOR_QC is temporarily legal.
+ * Phase 3 inserts VALIDATING between them (§17.3) — remove READY_FOR_QC from
+ * RENDERING's list when the validation engine ships.
+ */
+export const EXPORT_TRANSITIONS: Record<ExportStatus, ExportStatus[]> = {
+  QUEUED: ["RENDERING", "CANCELLED", "SUPERSEDED", "READY_FOR_QC"], // READY_FOR_QC: manual mark-done only
+  RENDERING: [
+    "VALIDATING",
+    "GENERATING_PREVIEW", // interim: preview stage runs before validation exists
+    "RENDER_FAILED",
+    "QUEUED", // lease expiry / retryable fail with attempts remaining (T5)
+    "CANCELLED",
+    "READY_FOR_QC", // preview disabled / manual mark-done
+  ],
+  RENDER_FAILED: ["QUEUED", "SUPERSEDED"],
+  VALIDATING: ["VALIDATION_FAILED", "GENERATING_PREVIEW"],
+  VALIDATION_FAILED: ["QUEUED", "SUPERSEDED"],
+  GENERATING_PREVIEW: ["PREVIEW_FAILED", "READY_FOR_QC"],
+  PREVIEW_FAILED: ["GENERATING_PREVIEW", "SUPERSEDED"],
+  READY_FOR_QC: ["QC_FAILED", "READY_FOR_DELIVERY", "SUPERSEDED"],
+  QC_FAILED: ["SUPERSEDED"],
+  READY_FOR_DELIVERY: ["PACKAGED", "SUPERSEDED"],
+  PACKAGED: ["DELIVERED"],
+  DELIVERED: ["ARCHIVED"],
+  SUPERSEDED: [],
+  ARCHIVED: [],
+  CANCELLED: [],
+};
+
+export type TransitionActor = {
+  type: "WORKER" | "USER" | "SYSTEM";
+  id?: string | null;
+  note?: string | null;
+};
+
+export function isTransitionAllowed(from: ExportStatus, to: ExportStatus): boolean {
+  return EXPORT_TRANSITIONS[from]?.includes(to) ?? false;
+}
+
+/**
+ * Applies a state transition inside an existing transaction: validates
+ * legality, stamps statusChangedAt, appends the ExportEvent audit row.
+ * Throws PipelineError(409) on an illegal transition (§4.2 rules).
+ */
+export async function applyTransition(
+  tx: Prisma.TransactionClient,
+  exportRow: { id: string; status: ExportStatus },
+  to: ExportStatus,
+  actor: TransitionActor,
+  extraData: Prisma.ExportUpdateInput = {}
+) {
+  if (!isTransitionAllowed(exportRow.status, to)) {
+    throw new PipelineError(409, `Invalid transition ${exportRow.status} → ${to}`);
+  }
+  const updated = await tx.export.update({
+    where: { id: exportRow.id },
+    data: { status: to, statusChangedAt: new Date(), ...extraData },
+  });
+  await tx.exportEvent.create({
+    data: {
+      exportId: exportRow.id,
+      fromStatus: exportRow.status,
+      toStatus: to,
+      actorType: actor.type,
+      actorId: actor.id ?? null,
+      note: actor.note ?? null,
+    },
+  });
+  return updated;
+}

prisma/migrations/20260801000000_render_pipeline_phase1_2/migration.sql

@@ -0,0 +1,178 @@
+-- CreateEnum
+CREATE TYPE "ExportStatus" AS ENUM ('QUEUED', 'RENDERING', 'RENDER_FAILED', 'VALIDATING', 'VALIDATION_FAILED', 'GENERATING_PREVIEW', 'PREVIEW_FAILED', 'READY_FOR_QC', 'QC_FAILED', 'READY_FOR_DELIVERY', 'PACKAGED', 'DELIVERED', 'SUPERSEDED', 'ARCHIVED', 'CANCELLED');
+
+-- CreateEnum
+CREATE TYPE "RenderJobStatus" AS ENUM ('QUEUED', 'CLAIMED', 'RUNNING', 'COMPLETED', 'FAILED', 'CANCELLED', 'EXPIRED');
+
+-- CreateEnum
+CREATE TYPE "RenderJobType" AS ENUM ('AE_RENDER', 'PREVIEW_ONLY', 'DELIVERY_BUILD');
+
+-- CreateEnum
+CREATE TYPE "ValidationStatus" AS ENUM ('PASS', 'FAIL', 'WARN', 'SKIPPED');
+
+-- CreateEnum
+CREATE TYPE "QCResult" AS ENUM ('PASS', 'FAIL');
+
+-- CreateEnum
+CREATE TYPE "MachineStatus" AS ENUM ('ONLINE', 'OFFLINE', 'DISABLED');
+
+-- CreateEnum
+CREATE TYPE "DeliveryStatus" AS ENUM ('DRAFT', 'QUEUED', 'BUILDING', 'READY', 'DELIVERED', 'FAILED', 'CANCELLED');
+
+-- AlterTable
+ALTER TABLE "projects" ADD COLUMN     "deliveryConfig" JSONB;
+
+-- CreateTable
+CREATE TABLE "exports" (
+    "id" TEXT NOT NULL,
+    "shotId" TEXT NOT NULL,
+    "projectId" TEXT NOT NULL,
+    "taskId" TEXT,
+    "versionId" TEXT,
+    "versionNumber" INTEGER NOT NULL,
+    "versionString" TEXT NOT NULL,
+    "status" "ExportStatus" NOT NULL DEFAULT 'QUEUED',
+    "statusChangedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "aepPath" TEXT NOT NULL,
+    "compName" TEXT NOT NULL,
+    "rendererType" TEXT NOT NULL,
+    "outputDir" TEXT NOT NULL,
+    "outputPattern" TEXT NOT NULL,
+    "frameStart" INTEGER NOT NULL,
+    "frameEnd" INTEGER NOT NULL,
+    "fps" DOUBLE PRECISION NOT NULL,
+    "width" INTEGER NOT NULL,
+    "height" INTEGER NOT NULL,
+    "colorspace" TEXT,
+    "deliveryMovPath" TEXT,
+    "previewMovKey" TEXT,
+    "thumbnailKey" TEXT,
+    "metadataKey" TEXT,
+    "exrFileCount" INTEGER,
+    "exrTotalBytes" BIGINT,
+    "checksum" TEXT,
+    "submittedById" TEXT,
+    "submittedByName" TEXT,
+    "supersededById" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "exports_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "render_jobs" (
+    "id" TEXT NOT NULL,
+    "type" "RenderJobType" NOT NULL DEFAULT 'AE_RENDER',
+    "exportId" TEXT,
+    "deliveryId" TEXT,
+    "attempt" INTEGER NOT NULL DEFAULT 1,
+    "maxAttempts" INTEGER NOT NULL DEFAULT 3,
+    "status" "RenderJobStatus" NOT NULL DEFAULT 'QUEUED',
+    "priority" INTEGER NOT NULL DEFAULT 50,
+    "manifest" JSONB NOT NULL,
+    "machineId" TEXT,
+    "claimedAt" TIMESTAMP(3),
+    "leaseExpiresAt" TIMESTAMP(3),
+    "startedAt" TIMESTAMP(3),
+    "finishedAt" TIMESTAMP(3),
+    "progress" DOUBLE PRECISION NOT NULL DEFAULT 0,
+    "currentFrame" INTEGER,
+    "totalFrames" INTEGER,
+    "etaSeconds" INTEGER,
+    "exitCode" INTEGER,
+    "errorMessage" TEXT,
+    "logTail" TEXT,
+    "logFileKey" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "render_jobs_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "export_events" (
+    "id" TEXT NOT NULL,
+    "exportId" TEXT NOT NULL,
+    "fromStatus" TEXT,
+    "toStatus" TEXT NOT NULL,
+    "actorType" TEXT NOT NULL,
+    "actorId" TEXT,
+    "note" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "export_events_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "machines" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "hostname" TEXT NOT NULL,
+    "status" "MachineStatus" NOT NULL DEFAULT 'OFFLINE',
+    "enabled" BOOLEAN NOT NULL DEFAULT true,
+    "lastSeenAt" TIMESTAMP(3),
+    "workerVersion" TEXT,
+    "aeVersion" TEXT,
+    "capabilities" JSONB,
+    "availability" JSONB,
+    "renderNowUntil" TIMESTAMP(3),
+    "apiKeyHash" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "machines_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "worker_heartbeats" (
+    "id" TEXT NOT NULL,
+    "machineId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "cpuPercent" DOUBLE PRECISION,
+    "memPercent" DOUBLE PRECISION,
+    "diskFreeGb" DOUBLE PRECISION,
+    "currentJobId" TEXT,
+
+    CONSTRAINT "worker_heartbeats_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "exports_status_idx" ON "exports"("status");
+
+-- CreateIndex
+CREATE INDEX "exports_projectId_status_idx" ON "exports"("projectId", "status");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "exports_shotId_versionNumber_key" ON "exports"("shotId", "versionNumber");
+
+-- CreateIndex
+CREATE INDEX "render_jobs_status_priority_createdAt_idx" ON "render_jobs"("status", "priority", "createdAt");
+
+-- CreateIndex
+CREATE INDEX "render_jobs_machineId_status_idx" ON "render_jobs"("machineId", "status");
+
+-- CreateIndex
+CREATE INDEX "export_events_exportId_createdAt_idx" ON "export_events"("exportId", "createdAt");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "machines_name_key" ON "machines"("name");
+
+-- CreateIndex
+CREATE INDEX "worker_heartbeats_machineId_createdAt_idx" ON "worker_heartbeats"("machineId", "createdAt");
+
+-- AddForeignKey
+ALTER TABLE "exports" ADD CONSTRAINT "exports_shotId_fkey" FOREIGN KEY ("shotId") REFERENCES "shots"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "render_jobs" ADD CONSTRAINT "render_jobs_exportId_fkey" FOREIGN KEY ("exportId") REFERENCES "exports"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "render_jobs" ADD CONSTRAINT "render_jobs_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "export_events" ADD CONSTRAINT "export_events_exportId_fkey" FOREIGN KEY ("exportId") REFERENCES "exports"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "worker_heartbeats" ADD CONSTRAINT "worker_heartbeats_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+

prisma/migrations/20260802000000_export_slate_fields/migration.sql

@@ -0,0 +1,5 @@
+-- Per-submission slate fields (RenderPipeline2 §9): authored per Export rather
+-- than per Shot, because they change from one delivery to the next. New exports
+-- default to the previous export's values.
+ALTER TABLE "exports" ADD COLUMN "vfxScope" TEXT;
+ALTER TABLE "exports" ADD COLUMN "submissionNote" TEXT;

prisma/schema.prisma

@@ -113,6 +113,72 @@ enum ProjectType {
   EPISODIC
 }
 
+// ─────────────────────────────────────────────
+// RENDER PIPELINE ENUMS (RenderPipeline2 §5.1)
+// ─────────────────────────────────────────────
+
+enum ExportStatus {
+  QUEUED
+  RENDERING
+  RENDER_FAILED
+  VALIDATING
+  VALIDATION_FAILED
+  GENERATING_PREVIEW
+  PREVIEW_FAILED
+  READY_FOR_QC
+  QC_FAILED
+  READY_FOR_DELIVERY
+  PACKAGED
+  DELIVERED
+  SUPERSEDED
+  ARCHIVED
+  CANCELLED
+}
+
+enum RenderJobStatus {
+  QUEUED
+  CLAIMED
+  RUNNING
+  COMPLETED
+  FAILED
+  CANCELLED
+  EXPIRED
+}
+
+enum RenderJobType {
+  AE_RENDER
+  PREVIEW_ONLY
+  DELIVERY_BUILD
+}
+
+enum ValidationStatus {
+  PASS
+  FAIL
+  WARN
+  SKIPPED
+}
+
+enum QCResult {
+  PASS
+  FAIL
+}
+
+enum MachineStatus {
+  ONLINE
+  OFFLINE
+  DISABLED
+}
+
+enum DeliveryStatus {
+  DRAFT
+  QUEUED
+  BUILDING
+  READY
+  DELIVERED
+  FAILED
+  CANCELLED
+}
+
 enum TakeQuality {
   HERO
   GOOD
@@ -292,6 +358,10 @@ model Project {
   episodeDueDates EpisodeDueDate[]
   shootDays       ShootDay[]
 
+  /// Per-production delivery naming/layout templates (RenderPipeline2 §11.2);
+  /// falls back to SystemConfig defaults when null
+  deliveryConfig Json?
+
   @@map("projects")
 }
 
@@ -359,6 +429,7 @@ model Shot {
   footagePlates FootagePlate[]
   references    ShotReference[]
   loggedTakes   Take[]        @relation("TakeToShot")
+  exports       Export[]
 
   @@unique([projectId, shotCode])
   @@map("shots")
@@ -752,6 +823,162 @@ model TakeAttachment {
   @@map("take_attachments")
 }
 
+// ─────────────────────────────────────────────
+// RENDER PIPELINE MODELS (RenderPipeline2 §5)
+// Phases 1 + 2: Export, RenderJob, ExportEvent, Machine, WorkerHeartbeat.
+// ValidationResult / QCReview / DeliveryPackage / DeliveryItem arrive in
+// later phases as additive migrations.
+// ─────────────────────────────────────────────
+
+/// One row per "Queue Export" click — carries the §4 state machine.
+model Export {
+  id              String       @id @default(cuid())
+  shotId          String
+  shot            Shot         @relation(fields: [shotId], references: [id])
+  projectId       String
+  taskId          String? // comp task the preview Version attaches to
+  versionId       String? // preview Version created at READY_FOR_QC (Phase 4)
+  versionNumber   Int // 4
+  versionString   String // "v004"
+  status          ExportStatus @default(QUEUED)
+  statusChangedAt DateTime     @default(now())
+
+  // Manifest (denormalised for querying; full manifest JSON on RenderJob)
+  aepPath       String
+  compName      String
+  rendererType  String // "aerender"
+  outputDir     String // render root for this export
+  outputPattern String // "UNG_106_010_020_cmp_TT_v004.[####].exr"
+  frameStart    Int
+  frameEnd      Int
+  fps           Float
+  width         Int
+  height        Int
+  colorspace    String? // expected, e.g. "ACES - ACEScg"
+
+  // Artifacts
+  deliveryMovPath String? // slate/burn-in delivery MOV on the SAN (§9)
+  previewMovKey   String? // web H.264 transcode in object storage
+  thumbnailKey    String?
+  metadataKey     String? // metadata JSON in object storage
+  exrFileCount    Int?
+  exrTotalBytes   BigInt?
+  checksum        String? // sequence-level digest (xxHash of per-file hashes)
+
+  // Slate fields authored per submission (not per shot): they change from one
+  // delivery to the next, so each Export carries its own and new exports
+  // default to the previous export's values.
+  vfxScope       String? @db.Text
+  submissionNote String? @db.Text
+
+  submittedById   String? // resolved User, else null
+  submittedByName String? // free text from panel config as fallback
+  supersededById  String? // newer Export that replaced this one
+
+  renderJobs RenderJob[]
+  events     ExportEvent[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@unique([shotId, versionNumber])
+  @@index([status])
+  @@index([projectId, status])
+  @@map("exports")
+}
+
+/// One execution attempt of work by a worker. Also used (type DELIVERY_BUILD)
+/// for delivery package builds — one queue/claim/lease/heartbeat mechanism.
+model RenderJob {
+  id          String          @id @default(cuid())
+  type        RenderJobType   @default(AE_RENDER)
+  exportId    String? // set for AE_RENDER / PREVIEW_ONLY
+  export      Export?         @relation(fields: [exportId], references: [id])
+  deliveryId  String? // set for DELIVERY_BUILD (Phase 5)
+  attempt     Int             @default(1)
+  maxAttempts Int             @default(3)
+  status      RenderJobStatus @default(QUEUED)
+  priority    Int             @default(50) // lower = sooner; <= 20 is urgent
+  manifest    Json // full Render Manifest snapshot (§6.2)
+
+  machineId      String?
+  machine        Machine?  @relation(fields: [machineId], references: [id])
+  claimedAt      DateTime?
+  leaseExpiresAt DateTime? // claim + leaseSeconds; renewed by progress reports
+  startedAt      DateTime?
+  finishedAt     DateTime?
+
+  progress     Float   @default(0) // 0..1
+  currentFrame Int?
+  totalFrames  Int?
+  etaSeconds   Int?
+  exitCode     Int?
+  errorMessage String?
+  logTail      String? @db.Text // last ~200 lines of aerender output
+  logFileKey   String? // full log uploaded to object storage on finish/fail
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([status, priority, createdAt])
+  @@index([machineId, status])
+  @@map("render_jobs")
+}
+
+/// Append-only audit log of Export state transitions (§5.9)
+model ExportEvent {
+  id         String   @id @default(cuid())
+  exportId   String
+  export     Export   @relation(fields: [exportId], references: [id])
+  fromStatus String?
+  toStatus   String
+  actorType  String // "WORKER" | "USER" | "SYSTEM"
+  actorId    String? // machineId or userId
+  note       String?
+  createdAt  DateTime @default(now())
+
+  @@index([exportId, createdAt])
+  @@map("export_events")
+}
+
+/// A render-capable machine (artist workstation or future render node) (§5.6)
+model Machine {
+  id             String        @id @default(cuid())
+  name           String        @unique // "RENDER-01"
+  hostname       String
+  status         MachineStatus @default(OFFLINE)
+  enabled        Boolean       @default(true) // admin kill-switch: disabled machines cannot claim
+  lastSeenAt     DateTime?
+  workerVersion  String?
+  aeVersion      String? // "2026 (24.x)"
+  capabilities   Json? // { maxConcurrentJobs: 1, tools: {...} }
+  availability   Json? // §7.10: { mode, windows, allowUrgentAnytime } — null = ALWAYS
+  renderNowUntil DateTime? // manual "Render Now" override; claims allowed until this time
+  apiKeyHash     String? // optional per-machine key (dormant; §15 — shared key for now)
+
+  renderJobs RenderJob[]
+  heartbeats WorkerHeartbeat[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@map("machines")
+}
+
+model WorkerHeartbeat {
+  id           String   @id @default(cuid())
+  machineId    String
+  machine      Machine  @relation(fields: [machineId], references: [id])
+  createdAt    DateTime @default(now())
+  cpuPercent   Float?
+  memPercent   Float?
+  diskFreeGb   Float?
+  currentJobId String?
+
+  @@index([machineId, createdAt])
+  @@map("worker_heartbeats")
+}
+
 model SketchTemplate {
   id        String   @id @default(cuid())
   name      String