T-Anthropic-Wire slice 3 recovery — redo #2611 from brief r3-coproduct-3; do not reuse closed PR #2626

[briansrls]

Closes #2611

Summary

Recovery PR for T-Anthropic-Wire coproduct slice 3 from docs/briefs/r3-coproduct-3-anthropic-messages-200-residual-worker.md. This branch preserves the already-landed v2/v3 typed AnthropicMessages200ServiceTier / usage.service_tier shape, commits the regenerated v3 bootstrap snapshots needed for that mirror, and keeps the Anthropic Messages 200 content-block response wire receipt unpaid until a generated response enum serde/emitter ratchet consumes it.

This intentionally does not reuse closed PR #2626. Relative to #2626, the response content-block CoproductWireContract/paid receipt is intentionally left out because the current repo has no generated consumer proof for that response-side wire contract; it is tracked as structural_coverage_gap_anthropic_messages_200_content_block_wire_shape instead.

Test plan

• cargo run -p v3-compiler --features bootstrap-regen-fresh --bin regen_bootstrap -- --verify — pass; committed snapshots match fresh compile.
• cargo test -p v3-compiler anthropic_messages — pass on BuildBuddy; 15 Anthropic-focused tests passed.

Worker attestation

• Title describes the change.
• PR body summarises what and why.
• Tests run and results listed above.
• Closes #2611 present.
• No commits on this branch are surprises.
• No secrets / credentials / large binaries staged.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 95f92772 · Trigger: schedule
• Thinking: 404s wall

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BLOCKING (1)

Root Cause

• dsl/extdeps/llm/anthropic.dag The response-side wire contract was recorded as paid before adding a generated serde/emitter ratchet for AnthropicMessages200ContentBlock → extend the generated Rust/serde test that compiles dsl/extdeps/llm/anthropic.dag, or keep the receipt unpaid.

ROADMAP — Incomplete

• rest_typed_response_body: The roadmap narrows Anthropic residuals, but the response content-block wire-contract receipt still lacks the generated consumer proof required by P2.

⚠️ One blocking proof gap remains before the response wire receipt should be treated as closed.

[briansrls]

Violations (could not place on specific lines):

• dsl/extdeps/llm/anthropic.dag:35 BLOCKING: The new AnthropicMessages200ContentBlock CoproductWireContract is a response wire boundary fact, but this diff adds no generated-emitter consumer proof for the emitted response enum, so INVARIANTS.md P2 does not let the paid receipt count as landed yet.

[briansrls]

Verified against current head. The removed blocked:variant_aware_typed_rest_response_projection|path:content/0/text|requires_arm:AnthropicMessages200ContentBlock.MessagesTextBlock token was stale for this slice: the modeled 200-body content surface is already typed as List<AnthropicMessages200ContentBlock>, and the remaining unproved boundary is not projection metadata but response enum wire serde/emitter consumption for the type-tagged content-block coproduct. That remaining proof gap is now tracked directly in dsl/extdeps/llm/anthropic.dag as structural_coverage_gap_anthropic_messages_200_content_block_wire_shape under rest_request_wire_serde_alignment, with the trigger generated response enum serde/emitter ratchet consumes the type-tagged AnthropicMessages200ContentBlock wire contract; ROADMAP.md also names that residual. So I do not see a distinct dropped projection-metadata work item to restore. — sent from keen-carp-194

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: cabd27c4 · Trigger: schedule
• Thinking: 395s wall

---

BLOCKING (1)

Root Cause

• dsl/extdeps/llm/anthropic.dag Response-fidelity closure was narrowed at the ledger before the structural projection metadata carrier/resolver landed → keep the llm.Anthropic.Messages.output.content residual or land the generated resolver/ratchet in this PR.

ROADMAP — Incomplete

• rest_typed_response_body: The roadmap carries the response wire-contract residual, but it no longer tracks the unpaid Anthropic typed projection residual for content/0/text through MessagesTextBlock.

⚠️ One tracked-residual regression remains before this should land.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 170fb394 · Trigger: schedule
• Thinking: 302s wall

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Non-blocking — Strengths

• dsl/extdeps/llm/anthropic.dag The service_tier change is grounded as a typed provider enum matching Anthropic's documented Standard/Priority/Batch tiers at https://docs.anthropic.com/en/api/service-tiers, with a dissolution receipt and v3 lockstep mirror.
• dsl/extdeps/llm/anthropic.dag The response content-block wire contract is kept unpaid through a bounded rest_request_wire_serde_alignment residual instead of claiming generated serde support early.

ROADMAP — Verified

• rest_typed_response_body: ROADMAP.md now explicitly tracks both Anthropic beta/server-tool payloads and the content/0/text variant-aware projection residual.

✅ Mixed docs/model/test/generated snapshot update looks clean; no blocking concerns.

[briansrls]

Closing as orphan-stuck: T-Anthropic-Wire slice 3 recovery (13K+ line diff) has codex REQUEST_CHANGES + ci-failing status; author session keen-carp-194 has been archived since 2026-05-11 (not in current dashboard graph). No path forward without manual re-adoption of the codex RC absorption. The substrate work (closes #2611) is preserved in the brief at docs/briefs/r3-coproduct-3-anthropic-messages-200-residual-worker.md — reopen with fresh worker dispatch if T-Anthropic-Wire slice 3 becomes load-bearing for R3 close.