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festifun/plan/lane-G-capsule.md
m3ultra 545f7a347d Plan: Phase 5 spec + directives round 4 (M10-M17, lanes E/F/G) 
plan/20-phase5.md is the phase-5 canonical spec: M10 beats/onsets,
M11 auto-director, M12 cinematic export (lane E); M13 anchor manager +
friend tags, M14 photo mode, M15 moment FX (lane F); M16 server-side
camera paths, M17 static memory-capsule export (lane G). foundation2
freezes the new contracts (beats.json, camPath JSON, paths table,
PATCH anchors, __F4D_API_BASE__ / manifest.capsule, transport/scene3d
hooks) and pre-wires all UI so parallel lanes never touch shared files.

DIRECTIVES Round 4 records the fresh-eyes upgrades (FFT caching,
WebAudio master clock, spatial audio; suite floor now 121), ratifies
the additive contract amendments, and sets run order:
foundation2 -> E, G, F (own worktrees, mandatory) -> integration2
(real-footage field test, v0.2.0 proposal).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-17 17:08:44 +10:00

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Lane G — Persistence & capsule (branch lane/g-capsule)

Scope: phase-5 milestones M16 + M17 (server-side camera paths, static memory-capsule export) — see 20-phase5.md.

  • Owned files: backend/festival4d/capsule.py, backend/tests/test_paths.py, backend/tests/test_capsule.py, frontend/src/pathsStore.js, plus the paths-route bodies in the region foundation2 marks for lane G. Nothing else.
  • Contracts you consume (frozen): paths table + route shapes, camPath JSON (validate on POST), window.__F4D_API_BASE__ override, manifest.capsule read-only flag.
  • M17 discipline: the capsule bakes API responses to files at the same relative paths the live API serves — the frontend must not know the difference. Ship serve.py (stdlib, Range-capable) in the bundle root; acceptance explicitly includes video seeking under it.
  • The capsule is the shareable artifact of the whole project — treat "zero requests to :8000" and "write UI absent" as hard acceptance, not nice-to-haves.

Done when: M16–M17 acceptance passes (endpoint tests + a served-capsule browser pass with evidence), pytest ≥ 121 + your tests, merged to main with synthetic end-to-end intact.