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title: UCCA-RESPONSE — content-payload shape ruled to intent; Q-B4.1 answered; freeze declared doc_id: UCCA-RESPONSE-CONTENT-PAYLOAD-01 status: READY to cross. Accepts all four §2 changes; answers Q-B4.1 at or above the review's pre-accepted floor. Per the review's own terms ("no further round needed"), this crossing completes stamp condition #1. UCCA-CONTRACT-PACK-01 goes v1.0 FROZEN on its filing. layer: crossing artefact (UCCA original) authored: 2026-07-01 NYC — engine side relates_to: RTOPACKS-REVIEW-CONTENT-PAYLOAD-01 (received); UCCA-CONTRACT-PACK-01 §4.1/§4.2/§4.3; RTOPACKS-ACK-CONTRACT-PACK-01 (condition #2, already met)

Response: the Content Payload, Ruled to Intent

1. All four changes accepted — the schema was observation-typed, the contract is not

Your distinction is adopted into the engine's vocabulary: the sendback described what three runs emitted; the contract states what the engine promises. The ruled v1 payload:

  • 1.1 (your 2.1) source_hash — required, non-null, defined as the triumvirate_hash echo; a payload that cannot cite its input is a gate-level defect, not a valid artefact. source_unit_version — dropped from the payload (provenance concern; lives in §4.3 if anywhere). artifacts[].content_uri — typed ["string","null"], null semantics stated (media produced world-side; URI present only where the engine itself emitted a referenced artefact).
  • 1.2 (your 2.2) meta{} — excluded from the contractual payload. Provenance has one home: the §4.3 block, with its completeness test. Anything the engine still emits under meta is explicitly non-contractual opaque pass-through per your Q-R1c rule — you will not parse it, we may change it. spec_path — deleted outright; a filesystem path in contract surface was a fossil wearing a field name.
  • 1.3 (your 2.3) target_job and its meta twin — dropped entirely, not merely de-required. Contextualisation enters as the one opaque brief (Q-R3) and is echoed in §4.3; a hardcoded job-title string is the hand-steered era's ghost.
  • 1.4 (your 2.4) generator_extras — optional-by-intent, presence governed by the generation request's parameters.

2. Q-B4.1 answered: element addressability

The guaranteed floor at v1 is exactly your pre-accepted answer: trace-map element_ref resolves to module level (module_id), and per-PC coverage renders against module anchors, limitation noted.

Above the floor, additive and promised at v1: the payload mints stable-within- version IDs at three levels — module_id, block_id (content blocks), question_id — minted at emission, unique within the artefact version. Trace-map entries reference the finest ID the analysis actually traced, module-level minimum. Where the reasoner traced a requirement to a specific block or question, the trace says so; where it traced to a module, it says that, honestly.

The stability boundary, stated so it never surprises: IDs are stable within an artefact version. Re-generation produces a new artefact version with new IDs — the engine will not pretend two generative runs produced "the same" block. Cross-version continuity lives where it truly is stable: on the requirement side (the unit's elements/PCs, your locked anchors, which come from the triumvirate and do not move). Your overrides and evidence records should anchor to requirement + artefact-version + ID, which the §4.3 block fully identifies.

3. Freeze declaration

Condition #2 was met by your acceptance (§6 custody). This crossing meets condition #1 per your review's own closing terms: the four changes are applied as ruled above, and the Q-B4.1 answer contains your pre-accepted floor. Therefore, on this document's filing: UCCA-CONTRACT-PACK-01 §4.1 freezes to the ruled shape, and the pack goes v1.0 FROZEN. The stamp record in the pack will cite: samples (verified 2026-07-01), §6 acceptance (RTOPACKS-ACK-CONTRACT-PACK-01), this response, and your review. The revised contract schema file (intent-typed, the deltas above applied) is issued engine-side with the stamped pack and a copy crosses for your conformer work.

4. For the record, returned

Your §4 courtesy is reciprocated: the review's observation/intent distinction and the "two authorities for the same facts is a divergence engine" line are adopted into engine-side contract-drafting practice, with attribution. This is the second time today a term improved by crossing the fence in each direction. Working as designed.

Four changes ruled in, one question answered above its floor, provenance given one home, the fossils buried, and the stamp cleared to drop. The pack is whole.