P&C Wave 1: Foundations — Retrospective

• Sprint: P&C Wave 1: Foundations (first of the 5 P&C waves, D36) — gates P1, P5, P9
• Window: started 2026-06-20 · ended (retro) 2026-06-20
• Items: WI-010 (P1 scan I/O), WI-014 (P5 ingestion core), WI-068 (P9 floor) — 34/34 pts, all done
• Decision: Paul approved 2026-06-20 (D39). Full deliberation: deliberations/closed-claude-2026-06-20-p-c-wave-1-foundations-retro.md.
• Process: D23/D24/D25 — independent Claude + Codex passes, reconciled (Claude verified Codex's findings against the code, not rubber-stamped).

Outcome

The sprint did the foundational thing right: it turned three specs into executable reference contracts before any physical surface was built. No work item was reopened. The floor (P9) proved its worth in the same wave — P5 imports it instead of inventing IDs, validating the P9-first build order (D30).

A Claude finding was withdrawn on review: P1 does not need to absorb the P9 floor convention into its schema — per CONVENTION.md/D33 the floor IDs are a gateway wrapper around the payload, so request_id stays scan-local and the wrapper is proven later at the gateway (WI-069).

Per-item review (vs spec/vision)

Item	Verdict	Note
WI-010 P1	Sound	Schema bundle + golden fixtures cover all 7 payloads, comparables, taxonomy/watchlist, versioning, 0–1000 coords. Tested via a custom validator (not an independent Draft-2020-12 one — see finding 3).
WI-014 P5	Sound, floor-aligned	One-door reference proven in code; in-memory only — physical enforcement is P6/WI-015's job (see finding 4/5).
WI-068 P9	Sound	Convention + quarantine + keyless floor; API envelope/DTO (WI-069) deferred to W4.

Combined findings + actions (reconciled, approved)

#	Finding	Found by	Action
1	P1 bundle fit for Wave 1	Codex	No action — accepted
2	P1 needs no P9-floor schema change (gateway wrapper, D33)	Both (Claude conceded)	No P1 action; verify wrapper in WI-069
3	P1 tested via custom validator, not independent Draft-2020-12	Codex	WI-072 (backlog) — standard-schema smoke test
4	P5 strong but in-memory only	Both	WI-015 acceptance criterion — conformance-test P6 vs the P5 reference
5	P5 invariants to cover in P6: import-run idempotency, durable-media rejection, expected item-version, status/attach-media decisions, physical actor authz	Codex	Folded into the WI-015 criterion
6	P9 sound + reused; API/DTO/gateway deferred	Both	No Wave 1 action; verify in WI-069
7	platform README drift (KEYLESS list → auto-discover)	Both	Fixed
8	ci-floor.mjs not hermetic (bare npm/node)	Codex	Fixed — process.execPath

Applied on approval

• WI-015 gained the P5-reference conformance acceptance criterion (covering findings 4 + 5).
• WI-072 created in the Backlog (originSprint: this sprint) for the independent JSON-Schema test (finding 3).
• platform/README.md drift fixed (finding 7); ci-floor.mjs hardened to process.execPath (finding 8) — floor still green, 4 suites.
• Wave 1 added to status.retros; ended date recorded; decision logged as D39.