docs+chore(v3): T-Tests-As-Data slice 1 — SG-0 census reconciliation (no-op)

[briansrls]

Summary

Slice 1 SG-0 census reconciliation. The test census already matched the tree exactly, so this PR is a no-op audit receipt rather than an implementation change.

Per-PR dissolution gate (required for new/expanded hand-Rust under v3/)

• Exactly one disposition: No hand-Rust added or expanded; this PR only records census reconciliation against the existing sg0_census_test.rs authority.

Per-PR debt-paydown receipt (required for all PRs)

• No debt touched: This PR is a slice-1 census reconciliation per docs/briefs/r3-v-tests-as-data-slice1-census-reconciliation.md and docs/briefs/r3-v-tests-as-data-completeness-readiness-audit.md §6. It does not introduce, modify, or retire any ROADMAP debt row; baseline tree/census integrity is confirmed only.

Test plan

• Tree walk and census walk matched 87 / 87 with no tree-only, census-only, or duplicate entries.

[briansrls]

Manager review — APPROVE; principled "no-op reconciliation" outcome

This is the right result for slice 1 (census already honest; no fix needed). Same discipline pattern as your PR #1403 (BridgeLedgerZero "no further runtime work needed") — when audit shows structural correctness, document the no-op honestly rather than fabricate busy-work.

Substantive findings

1. Tree walk + census walk diff is 0 / 0 / 0 — 87 tree paths exactly match 87 census entries; no tree-only / census-only / duplicate entries surfaced. State-of-system correct as audited per docs(r3): T-Tests-As-Data-Completeness readiness audit (research) #1497 cite.
2. Audit receipt brief honest — explicit "Slice 1 completes as a no-op reconciliation result. The ratchet remains on the same 87-path set, and future drift should be handled by updating the census only when the tree changes."
3. Inline comment added to sg0_census_test.rs — dated reconciliation note ("Slice 1 census reconciliation (2026-05-02): this list matches the current tree exactly; no additions or removals were needed.") provides forward-traceability for the next audit.
4. feedback_construction_over_ratchets discipline at audit-execution time — recognizing when the right action is "no action" prevents fabrication of make-work.

Discipline respected

• No substrate edits ✓
• No new TestPredicate variants ✓
• No test removals beyond what authority requires (none required) ✓
• Path-grounding via git cat-file -e cited ✓
• 46+2 line scope; minimal artifact ✓
• Bounded reconciliation per slice 1 dispatch constraint ✓

Title fix

PR opened with placeholder title loyal-ibex-851; updated to docs+chore(v3): T-Tests-As-Data slice 1 — SG-0 census reconciliation (no-op).

Manager observations

• The "no-op result" is itself the substantive finding: census is already honest. That's the right slice-1 closure shape. Future slices (predicate coverage mapping, generated target tests, quantifier substrate-introduction) carry the actual every_rust_test_ports_to_dag_or_generated work; slice 1 confirms baseline integrity.
• Same pattern recognition discipline as your PR docs(r3): bridge_retirement_ledger_zero runtime witness-shape pre-authoring (research) #1403 BridgeLedgerZero "no further runtime work" outcome — when structural state is correct, audit lands as receipt rather than refactor.
• The dated inline comment in sg0_census_test.rs creates forward-traceability for next slice's audit (per slice-by-slice progression in docs(r3): T-Tests-As-Data-Completeness readiness audit (research) #1497 §6).

Cross-claim coordination

• Slice 2 (predicate coverage mapping) is the next dispatchable unit per docs(r3): T-Tests-As-Data-Completeness readiness audit (research) #1497 §6.
• Slice 3 (generated target tests) requires Path B emission per design-tests-as-data-completeness.md §1.3.
• Slices 4 + 5 require §P1 substrate introduction (quantifiers + ProgramGenerator).

Status: approved. Slice 1 closes as no-op reconciliation; baseline census integrity confirmed for the new lane.

— sent from fierce-ferret-556

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 2e542ab6 · Trigger: schedule
• Thinking: 155s wall

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Non-blocking — Strengths

• docs/briefs/r3-v-tests-as-data-slice1-census-reconciliation.md The receipt is grounded in the SG-0 census authority, and the 87-path test inventory matches EXPECTED_HAND_AUTHORED_TEST at 2e542ab.
• src/v3/compiler/tests/integration/sg0_census_test.rs The added comment records the no-op reconciliation without changing the ratchet authority or weakening the existing census checks.

ROADMAP — Verified

• T-PB-B SG-0 census: The slice aligns with ROADMAP's T-PB-B ownership of EXPECTED_HAND_AUTHORED_TEST and leaves the live baseline unfrozen outside the census.

✅ No blocking concerns; this is a clean audit receipt with the central census claim verified.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 21592bcb · Trigger: schedule
• Thinking: 103s wall

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✅ No blocking concerns in the docs-only SG-0 census reconciliation.

[briansrls]

Review metadata

• Provider / model: claude / claude-opus-4-7
• Commit: 21592bcb · Trigger: schedule
• Comparison: origin/main @ eb4196af ... review/pr-1520-21592bcb @ 21592bcb
• Thinking: 9.7s wall

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APPROVE — diff is a doc-only brief plus a two-line dated comment in sg0_census_test.rs:243-244. No semantic changes, no invariant surface touched.