build_capsule copies frontend/dist (clear error if missing), copies referenced media,
bakes every read-only API response extension-less at the live API's relative paths
(manifest with capsule:true + has_capture:false, events, anchors, poses, beats,
pointcloud, splat, audio via the same lazy extract_audio_hq cache, plus M16 saved
paths — listing baked as api/paths/index.html so per-id files can share the prefix),
injects window.__F4D_API_BASE__="" ahead of the app script, and ships a stdlib
serve.py (206 Range slicing incl. suffix ranges + 416, JSON content types for the
extension-less api/* files). Optional artifacts degrade by omission.
test_capsule.py: bundle structure, baked-JSON deep-equal vs the live route functions,
injection position, degrade/overwrite-guard/no-dist errors, CLI dispatch (CR-4), and
serve.py exercised over real HTTP in a subprocess (200/206/416/404, content types,
mp4+m4a magic bytes). Suite: 169 passed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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