R3 gate #38: coercion_cost_equals_complexity_by_construction (T-CostLens-Composition)

[briansrls]

Auto-opened by session-dashboard for session swift-lynx-522.
Pushing to session/swift-lynx-522 advances this PR.

Worker attestation

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• Title describes the change (not the session id or branch).
• PR body summarises what and why (replace the TODO below).
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Summary

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Test plan

• TODO: list the commands that ran (or "no tests changed; relied on CI") and the outcome.

[briansrls]

Response to cursor/composer-2 (review #11856)

• Verified: The APPROVE verdict matches current session/swift-lynx-522: gate Extend minimal execution model to all tool workflows #52 receipt is factored into cross_target_structural_cost_derivation_fixture(), and coercion_cost_equals_complexity_by_construction pins complexity_of(..).work == symbolic_cost_of(..) on the demo port after the same emitted-target structural-cost checks. No new SG-0 census paths (same integration module already in EXPECTED_HAND_AUTHORED_TEST).

• Exploratory (wall-clock manifest): Valid for this repo’s interim policy — sibling r3_free_consequences_second_batch_test::cross_target_optimization_cost_structurally_derived_receipt is already listed in dsl/gunbc/test_node_wall_clock_ratchet.dag; the new test runs the same heavy fixture first, so it should be listed too. Pushed 0f0048255: adds r3_free_consequences_second_batch_test::coercion_cost_equals_complexity_by_construction to wall_clock_warn_libtest_tokens. wall_clock_ratchet_manifest::tests::ratchet_dag_warn_manifest_lines_are_parseable_warn_policy_objects passes locally.

• Merge readiness (post-push): Still blocked on dashboard criteria: 1/2 distinct approving providers on the new HEAD until another review lands; CI must go green on 0f0048255. Not squash-merging until ≥2 approvals, no REQUEST_CHANGES, mergeable clean, and checks green per operator policy.

[briansrls]

Dashboard relay (prior PR comment) — verification

Re-checked current origin/session/swift-lynx-522 @ 0f0048255:

• cross_target_structural_cost_derivation_fixture() + coercion_cost_equals_complexity_by_construction / cross_target_optimization_cost_structurally_derived_receipt in r3_free_consequences_second_batch_test.rs match the described behavior.
• r3_free_consequences_second_batch_test.rs remains a single SG-0 path under EXPECTED_HAND_AUTHORED_TEST (sg0_census_test.rs); the diff never added a new census entry.
• dsl/gunbc/test_node_wall_clock_ratchet.dag includes r3_free_consequences_second_batch_test::coercion_cost_equals_complexity_by_construction next to the existing gate Extend minimal execution model to all tool workflows #52 token.

No further code commit is required for this relayed thread — it is author merge-readiness commentary, not a reviewer change request.

Merge readiness: dashboard-ops reviews gunb-ai/gunbc#3087 still shows 1/2 distinct dashboard approvals (cursor only on the reviewed artifact). gh pr checks still has v3 pending on the latest workflow for this branch, so CI is not all-green yet. Squash-merge remains deferred until ≥2 distinct approving providers, no REQUEST_CHANGES, mergeable clean, and checks green.

— sent from swift-lynx-522

[briansrls]

Review #11912 (cursor/composer-2) — verified

No file:line findings to implement; the APPROVE matches current main-bound diff: gate #38 receipt (complexity_of(..).work vs symbolic_cost_of on demo), shared gate #52 fixture helper unchanged in intent, and wall-clock warn token in dsl/gunbc/test_node_wall_clock_ratchet.dag.

Merge: CI on HEAD was green (v3 / ci / fmt / self_host_ratchet), GitHub mergeStateStatus=CLEAN, dashboard had ≥2 distinct approvals (codex + cursor). Squash-merged via gh pr merge 3087 --squash --delete-branch.

— sent from swift-lynx-522