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dtourolle 28e3bd9496 docs: generated traceability matrix 
Committed rather than ignored, matching house precedent: coverage becomes
visible to anyone browsing the repo, and its movement over time is real history
worth having in the log.
2026-07-30 18:59:06 +02:00

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# Requirements traceability matrix
<!-- GENERATED FILE - do not edit by hand. -->
<!-- Regenerate: scripts/traceability/traceability-gate.sh -->
**Generated:** 2026-07-30T16:58:28+00:00
Denominators are read from [`requirements.md`](requirements.md) at run time, never hardcoded. Coverage counts a requirement only when it is tagged in source **and** has a verification tier this repo's CI host can execute (`T1, T2, T3, static`).
## Summary
| Metric | Value |
|---|---|
| Source files scanned | 84 |
| TRACES tags found | 0 |
| EXCEPTION tags found | 0 |
| Requirements defined | 63 |
| Requirements covered | 0 |
| **Coverage** | **0.0%** (0/63) |
| Coverage of CI-executable scope | 0.0% (0/52) |
| Tagged but unexecuted in CI | 0 |
| Orphan tags | 0 |
### By type
| Type | Covered | Tagged but unexecuted | Defined |
|---|---|---|---|
| AR | 0 | 0 | 27 |
| DP | 0 | 0 | 8 |
| IR | 0 | 0 | 8 |
| GR | 0 | 0 | 9 |
| VR | 0 | 0 | 11 |
## Not executable in CI
These requirements have no verification tier this repo's CI host can run, so a tag on them is evidence of *intent*, not of verification. They are never counted as covered.
| ID | Tiers | Tagged in source | Requirement |
|---|---|---|---|
| AR-027 | T4 | no | Throughput acceptable for **arbitrary** gallery size |
| VR-001 | out-of-ci | no | HDF5 post-inference dump at the embedded-frame boundary |
| VR-002 | out-of-ci | no | Replay drives the **real** KPN nodes, not a reimplementation |
| VR-003 | out-of-ci | no | Scoring: micro-F1 against X-Ray, precision/recall logged at every eva… |
| VR-004 | out-of-ci | no | Reproducible validation corpus with ground truth |
| VR-005 | out-of-ci | no | Minimum face size study — TPI/FPI vs probe size, gallery held at nati… |
| VR-006 | out-of-ci | no | Re-tune `scene_threshold` once native-rate decode lands |
| VR-007 | out-of-ci | no | Expansion band, clustering threshold, and deferred-pass ablation |
| VR-008 | out-of-ci | no | Gallery scaling benchmark — throughput vs gallery size |
| VR-010 | out-of-ci | no | Dump provenance attributes — embedder model, detector settings, `dens… |
| VR-011 | out-of-ci | no | Rewrite the replay harness for the post-AR-012 output contract |
## Orphan tags
A tag naming an ID `requirements.md` does not define. This is what renumbering produces, and what a typo produces.
_None._
## Requirements tracing up to nothing
A register row whose `Traces to` cell names no parent. Work serving no stated goal is how scope creeps in, and it is invisible unless something looks.
_None._
## Recorded exceptions
Deliberate, documented departures from an invariant (`EXCEPTION: XX-nnn <reason>`). Reported separately and never counted as coverage — an exception is a decision to be reviewed, not evidence a requirement is met.
_None._
## Register
| ID | Status | Tier | Traces to | Trace state | Tagged in | Requirement |
|---|---|---|---|---|---|---|
| AR-001 | Done | T3 | SR-002 | untagged | - | Detect faces in sampled frames; emit bbox, confidence, 5-point landma… |
| AR-002 | Planned | T2 | SR-002 | untagged | - | Minimum face size 66×66 px, expressed in **original** resolution (dec… |
| AR-003 | Planned | T1, T2, T4 | SR-002 | untagged | - | No fixed per-frame face cap — crowd scenes must not lose background c… |
| AR-004 | Planned | T1, T4 | SR-002 | untagged | - | Backpressure: unbounded faces/frame absorbed by slowing, never by dro… |
| AR-005 | Done | T1, T3 | SR-002 | untagged | - | Align to 112×112 via ArcFace 5-point similarity transform |
| AR-006 | Done | T3 | SR-002 | untagged | - | 512-d L2-normalised embeddings, batched |
| AR-007 | In Progress | T2 | SR-002 | untagged | - | Associate detections by IoU + embedding, with **frame-dependent** wei… |
| AR-008 | Planned | T2 | SR-002 | untagged | - | One track pool keyed on `last_seen`; no separate revival path |
| AR-009 | Done | T2 | SR-002 | untagged | - | Camera-cut detection (histogram) as an association hint |
| AR-010 | **Not started** — `… | T2 | SR-002 | untagged | - | Scene-boundary detection (TransNetV2) as an association hint |
| AR-011 | Planned | T1, T2 | SR-002 | untagged | - | **Every model is fed the input it was trained for** — cost reduced by… |
| AR-012 | Planned | T2 | **SR-002** | untagged | - | Presence follows **track extent**, not per-frame recognition |
| AR-013 | Planned | T2 | SR-002 | untagged | - | `last_seen` optional state machine; window ends at last sighting, nev… |
| AR-014 | Planned | T2 | SR-002 | untagged | - | Belief swap A→B terminates the track and starts a new one |
| AR-015 | Planned | T2 | SR-002 | untagged | - | Two live tracks owned by one actor ⇒ treat as a detected cut, re-asso… |
| AR-016 | Planned | T2 | SR-002 | untagged | - | All tracks closed at EOF — a film ends with faces on screen |
| AR-017 | Planned | T1, T2 | SR-002 | untagged | - | Every presence claim carries its belief and identification route |
| AR-018 | Planned | T1, T2 | SR-005 | untagged | - | Per-subject embedding store with banded admission (novel enough, safe… |
| AR-019 | In Progress | T2 | SR-005 | untagged | - | Per-film gallery annex from owned tracks; acquires the non-frontal vi… |
| AR-020 | Planned | T2 | SR-005 | untagged | - | Deferred re-identification of unknown tracks against the final expand… |
| AR-021 | Planned | T2 | SR-005 | untagged | - | Cluster unknown tracks into one entity per person, under temporal can… |
| AR-022 | Planned | T1, T2 | §4 | untagged | - | Capture still-unidentified tracks: embeddings, metadata, **context cr… |
| AR-023 | Done | T1 | SR-002 | untagged | - | Fit sigmoid calibration from intra/inter similarity distributions |
| AR-024 | Planned | T1, static | SR-002 | untagged | - | **Always the calibrated probability, never a raw cosine** — exception… |
| AR-025 | Planned | T1 | SR-002 | untagged | - | Per-track Bayesian accumulation in log-odds, with correlated-observat… |
| AR-026 | In Progress | T1, T4 | SR-001 | untagged | - | All similarity computed as GEMM, including annex and deferred pass |
| AR-027 | Planned | T4 | SR-001 | untagged | - | Throughput acceptable for **arbitrary** gallery size |
| DP-001 | Done | T1, manual | PR-004 | untagged | - | One analysis core; modes are front-ends and must not fork pipeline lo… |
| DP-002 | Done | T1, manual | PR-004 | untagged | - | Batch CLI over one title |
| DP-003 | Planned | T1, manual | PR-004 | untagged | - | On-demand resident service with bounded, observable queue |
| DP-004 | Planned | T1, manual | PR-004 | untagged | - | Opportunistic/idle mode: external trigger, hard stop, implicit re-que… |
| DP-005 | Planned | T1, manual | PR-004 | untagged | - | Native installer, no Docker; Fedora + Arch |
| DP-006 | Planned | T1, manual | PR-003 | untagged | - | Background incremental gallery refresh on a timer |
| DP-007 | Planned | T1, manual | PR-004 | untagged | - | CI builder image, CPU-only, pinned by tag in the Gitea container regi… |
| DP-008 | Planned | T1, manual | PR-004 | untagged | - | Builder images + release jobs per backend (cpu / cuda / rocm); ship b… |
| IR-001 | Done | T1 | SR-003 | untagged | - | Emit the JRay truth format as sibling `.jray.json` |
| IR-002 | Planned | T1 | SR-003 | untagged | - | Windows carry belief + route; `extraction.*` carries `extinction_sec`… |
| IR-003 | Planned | T1 | SR-003 | untagged | - | Output written **after** the deferred pass, not at EOF |
| IR-004 | **Done** — `src/aud… | T1 | SR-003 | untagged | - | Compute the audio signature exactly per server spec §3 |
| IR-005 | **Done** — `tests/f… | T1 | SR-003 | untagged | - | Golden-vector fixture shared with the plugin repo to prove bit-exactn… |
| IR-006 | Done | T1, manual | SR-001 | untagged | - | Jellyfin round-trip: pull pending queue, push complete results only |
| IR-007 | **Done** | T1 | SR-003 | untagged | - | Media < 120 s: emit no signature, apply no sync offset — identical ru… |
| IR-008 | **Done** | T1 | SR-003 | untagged | - | Emit and honour the signature's own `v1:` version prefix |
| GR-001 | Done | T1, T3 | SR-001, SR-005 | untagged | - | Build gallery from Jellyfin library cast, TMDB profile fallback |
| GR-002 | Done | T1, T3 | PR-003 | untagged | - | Incremental `--merge` refresh without re-embedding known actors |
| GR-003 | Planned | T1, T3 | SR-001 | untagged | - | Report coverage: zero-image actors, under-referenced actors, dedup, c… |
| GR-004 | **Done** — basename… | T1, T3 | SR-001 | untagged | - | Stamp embedder identity into the gallery; **hard startup error** on m… |
| GR-005 | Done | T1, T3 | **SR-005** | untagged | - | Gallery data never leaves the instance |
| GR-006 | Planned | T1 | SR-005 | untagged | - | Provenance tiers: baked / harvested / confirmed, distinguishable per … |
| GR-007 | Planned | T1 | SR-005 | untagged | - | Persist harvested embeddings **flagged and reviewable**, never silent… |
| GR-008 | Planned | T1 | SR-005 | untagged | - | Flag distributional outliers among an actor's references (poisoning g… |
| GR-009 | TBD | T1 | §4 | untagged | - | Human-confirmed associations persist and improve future extractions |
| VR-001 | Done | out-of-ci | PR-002 | untagged | - | HDF5 post-inference dump at the embedded-frame boundary |
| VR-002 | Done | out-of-ci | PR-002 | untagged | - | Replay drives the **real** KPN nodes, not a reimplementation |
| VR-003 | Done | out-of-ci | PR-002 | untagged | - | Scoring: micro-F1 against X-Ray, precision/recall logged at every eva… |
| VR-004 | Done | out-of-ci | PR-002 | untagged | - | Reproducible validation corpus with ground truth |
| VR-005 | Planned | out-of-ci | PR-002 | untagged | - | Minimum face size study — TPI/FPI vs probe size, gallery held at nati… |
| VR-006 | Planned | out-of-ci | PR-002 | untagged | - | Re-tune `scene_threshold` once native-rate decode lands |
| VR-007 | Planned | out-of-ci | PR-002 | untagged | - | Expansion band, clustering threshold, and deferred-pass ablation |
| VR-008 | Planned | out-of-ci | PR-002 | untagged | - | Gallery scaling benchmark — throughput vs gallery size |
| VR-009 | Planned | T1, out-of-ci | PR-002 | untagged | - | Verify accumulated posteriors are calibrated against held-out tracks |
| VR-010 | Planned | out-of-ci | PR-002 | untagged | - | Dump provenance attributes — embedder model, detector settings, `dens… |
| VR-011 | Planned | out-of-ci | PR-002 | untagged | - | Rewrite the replay harness for the post-AR-012 output contract |
## Detailed mapping
_No TRACES tags found yet. Tags are added as code is written; an empty matrix on a new tree is the correct reading, not a failure._
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