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Protocol: RunSnapshot gains CompletedSteps (accumulated from checkpoint
artifact paths, reset on start) so the frontend can tell when real
pipeline geometry exists. New coordinator method StepArtifact plus
GET /api/artifacts/steps serves steps/*.glb while a run is active (any
lifecycle status), traversal-guarded and .glb-only, so stages appear
without waiting for run completion.
Frontend: GLTFLoader loads the latest completed step into the viewport
group as soon as its checkpoint lands over SSE; replay placeholder
frames render only while no step artifacts exist. ?freeze=1 query param
stops rotation for deterministic screenshot verification. Three.js r160
and GLTFLoader (with BufferGeometryUtils) are vendored under public/
vendor with an import map and a window.THREE shim, replacing the CDN
UMD script; the ~1.4MB vendored three.js files are third-party
dependencies (MIT), not project assets.
Tests: store accumulation of completed artifact paths; steps endpoint
serves GLB during an active run, rejects traversal, 404s missing files.
Verified: dotnet build Debug+Release clean, 42/42 tests pass, Fable
compile clean, release server smoke serves index/vendor/steps endpoint.
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[Change Nature]
- This commit adds the first runnable increment of the F# artifact
pipeline: CLI, server, frontend bundle, stage fixture, and tests.
It is feature work, not a bug fix.
[New Capability]
- CLI `run` executes the three-step Blender fixture through the process
bridge and writes GLBs, step logs, events, and a manifest; `verify`
validates a manifest without Blender.
- Server exposes run start, run-scoped SSE, artifact manifest/file
routes, and serves the Fable frontend from its build output.
- Frontend starts runs, follows run-scoped SSE progress, and links the
artifact manifest on completion.
[Implementation]
- Shared layer holds domain, run state, replay, and artifact contracts;
Modeling holds the pipeline, 120s bridge timeout, and result-file
protocol; stage/blender/fixture.py owns geometry in Python (bpy owns
geometry, F# owns orchestration).
- Fable bundle is regenerated into public/ and copied by the server
project; solution includes all projects with warnings-as-errors.
- README documents build, Fable, server, interpreter/env, fixture
limitations, and current verification status.
[Impact]
- Verified: 40/40 solution tests pass; Release build 0 warnings/errors;
real CLI run with bpy 5.0.1 produced 3 GLBs, 3 logs, and a
verify-clean manifest; isolated-port server smoke flow succeeded.
- Not yet verified: browser end-to-end behavior and production
fidelity. Artifacts and caches are gitignored.
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