[codex] docs(r3): audit gate 16 fixed-point preconditions

[briansrls]

Summary

• Adds a focused R3 Gap 3 / gate docs: Add Appendix A with DAG modules, interfaces, and type definitions #16 coordination audit for the self-host fixed-point R3 strong-form preconditions.
• Records the local HEAD read across the four joint blockers: R2-Evaluator, R2-Grounding Rust+Python, T-LP/SG-0, and Row-B materialization.
• Captures the sequencing rule that PB P3 must not dispatch and pb_self_compile_fixed_point_strong must not be authored until the single dispatch ledger read is green.

Why

Gate #16 is currently a cross-manager sequencing problem rather than an implementation-ready fixed-point patch. The existing close plan names the blockers, but this artifact gives the dashboard node a concrete coordination receipt and a parent/Director-ready payload without changing any gate statuses.

Validation

• Docs-only change; no build or test run.
• Verified local SG-0 expected-list snapshot from src/v3/compiler/tests/integration/sg0_census_test.rs: non-test 53, test 121, fragments 2.
• Checked the R2 closure ledger evaluator cells remain open before writing the audit.

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-pro
• Commit: 58bbd6e5 · Trigger: manual
• Comparison: main @ 0ee32598 ... session/smart-ram-625 @ 58bbd6e5
• Conversation: View conversation

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1. Story of the diff

This PR adds a dated coordination audit for R3 Gap 3 / gate #16, pb_self_compile_fixed_point, rather than changing compiler behavior or gate state. The new note explicitly keeps the gate non-dispatchable, then decomposes the strong fixed-point suite’s prerequisites into four blocked reads: Evaluator stability, Rust+Python grounding closure, T-LP/SG-0 closure, and Row-B materialization. The load-bearing mechanism is single-authority sequencing: partial R3 evaluator audit trails are allowed as evidence inputs, but the close predicate remains the existing R2 closure ledger cells rather than a new parallel status surface (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:20, :30). The final sequencing rule turns that audit into manager-facing instructions: keep verification in P0-only state, refresh the ledger first, then freeze Row-B from the same dispatch read before authoring the strong suite (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:34-39).

2. Invariant categories

1. LAYER MODEL (substrate vs implementation).

N/A — diff is documentation-only under docs/audit/; it does not introduce or mutate substrate types, Dag-carried facts, compiler passes, or dag.rs structures.

1. INVARIANTS.md + modeling-discipline.md.

Compliant — Boundary Discipline / single authority is handled correctly: the audit says partial R3-era work must map into “these exact cells” and “not into parallel status labels,” preventing a second closure authority beside the R2 ledger (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:30).

1. CODING.md.

N/A — no Rust implementation code, functions, helpers, APIs, naming surfaces, or error/result shapes are changed.

1. TESTING.md.

Compliant — no tests are added because this is an audit/status coordination doc, but it preserves test discipline by keeping src/v3/std/verification.dag in “P0-only state” and explicitly forbidding the pb_self_compile_fixed_point_strong suite until the dispatch ledger read is green (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:34).

1. LOCKED DESIGN DECISIONS.

Compliant — the diff does not weaken the locked fixed-point / Pure Bootstrap direction; it keeps gate #16 non-dispatchable until prerequisites are green (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:9) and requires Row A + Row B + Row C plus non-Rust Row-B byte-stability at P3 dispatch (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:39).

1. TRACKED vs UNTRACKED DEBT.

Compliant — the doc names blockers and assigns next actions rather than creating an unbounded scaffold: Evaluator ownership and ledger refresh are called out as the next Director/PM action (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:13), Grounding needs a ledger-consumable Rust+Python receipt (:14), PB/Debt-Paydown must close #5-#8 before P3 (:15, :38), and Row-B materialization waits on a single ledger read plus verifier extension (:16, :39).

2.5. Top-down PM intent review

Compliant. The highest-level intent behind gate #16 is not diluted: the audit refuses to treat “P0 pins landed” as sufficient for strong fixed-point dispatch, and instead preserves the stronger fixed-point contract by requiring Evaluator, Grounding, SG-0/T-LP, and Row-B readiness before authoring the strong suite (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:9, :34-39). It also avoids the common PM-level failure mode of turning dissolution into permanent scaffolding: live SG-0 nonzero counts are treated as upstream blockers, not as an accepted residual (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:15, :45).

3. Verdict

APPROVE. The PR is a narrow documentation/audit addition that preserves existing authorities, makes gate #16 fail closed, and does not introduce substrate changes, implementation code, tests, or untracked scaffolding. No blocking or non-blocking findings.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: c85d5bdc · Trigger: schedule
• Thinking: 166s wall

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BLOCKING (1)

Root Cause

• docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md The audit consumed the pre-ratification Gap 3 framing but not the later §4/§6 ratification outcome → update the coordination action to execute the re-spawned R3 Evaluator Mgr path and then refresh the five ledger cells.

⚠️ The gate sequencing read is otherwise coherent, but the stale ownership action should be fixed before this coordination note lands.

[briansrls]

BLOCKING: The Director payload asks for an Evaluator lane ownership decision even though docs/r3-actual-close-plan.md §6 already ratifies option (a), so the new audit contradicts the single authoritative closure plan’s current manager-facing action.

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-pro
• Commit: dcf0caab · Trigger: manual
• Comparison: main @ 9649e210 ... session/smart-ram-625 @ dcf0caab
• Conversation: View conversation

---

1. Story of the diff

This PR adds a single coordination audit document for R3 Gap 3 / gate #16, pb_self_compile_fixed_point. The document’s core move is deliberately conservative: it says the P0 pins exist, but the strong fixed-point suite must remain non-dispatchable until four joint preconditions are proven green from their proper authorities, not inferred from scattered progress notes (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:9, :13-16). It then narrows the dominant blocker to the existing R2 Evaluator ledger cells, names the required green state for each cell, and gives sequencing instructions that keep verification.dag in P0-only shape until a single dispatch ledger read is green (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:20, :24-30, :34-39). That preserves the fixed-point/zero-floor direction rather than creating a premature “strong suite” planning artifact.

2. Invariant categories

1. LAYER MODEL (substrate vs implementation).

N/A — the diff is a new Markdown audit file only; it does not touch Dag, substrate declarations, cross-pass data carriers, or implementation code. The closest substrate-relevant decision is documentary: line :34 explicitly keeps src/v3/std/verification.dag in P0-only state rather than introducing new substrate/test surface before the dispatch ledger is green.

1. INVARIANTS.md + modeling-discipline.md.

Compliant — this is a fail-closed / single-authority sequencing note. The diff refuses to treat partial evidence as green (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:9, :13-16) and explicitly says partial R3 work must map into the existing R2 closure ledger cells “not into parallel status labels” (:30). That lines up with the invariant principles that facts live in exactly one authoritative place and missing support must not be fabricated into plausible success. chatgpt-review-cdad1953-93b7-42…

chatgpt-review-cdad1953-93b7-42…

1. CODING.md.

N/A — no Rust implementation was added or refactored. CODING.md governs Rust implementation style under src/v3/compiler/src/, while this diff only adds a docs/audit artifact. chatgpt-review-39007250-8a6c-4e…

1. TESTING.md.

Compliant — no tests were added because no compiler behavior changed. More importantly, the diff avoids adding a premature test artifact: docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:34 says there should be no pb_self_compile_fixed_point_strong suite until the single dispatch ledger read is green. That is the right testing posture for an audit-only PR: do not create a structural claim before the preconditions can execute. TESTING.md’s long-term direction is .dag TestClaim-based verification with no Rust residual, so holding the suite until the modeled preconditions are true is consistent. chatgpt-review-c46d560d-b9c3-44…

1. LOCKED DESIGN DECISIONS.

Compliant — the diff references fixed-point sequencing but does not weaken the locked zero-floor/fixed-point target. The authority says v3 fixed-point acceptance is bit-identical output from compiling compiler.dag, with hand_maintained_src shrinking to empty, and Pure Bootstrap to Zero requires self_host_fixed_point convergence plus zero hand-authored non-test/test/fragments. chatgpt-review-a4c46361-3fd5-4f…

chatgpt-review-0bfffbe4-7cae-4b…

The diff preserves that by blocking dispatch until Evaluator, Grounding Rust+Python, T-LP/SG-0, and Row-B materialization are green (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:13-16, :34-39).

1. TRACKED vs UNTRACKED DEBT.

Compliant — the audit does not introduce a scaffold, TODO, shim, or new temporary implementation shape. The “blocked” rows are bounded coordination blockers with source pointers and next actions (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:13-16), and the Evaluator section names the exact closure cells and required green states (:24-28). That is tracked coordination debt, not unbounded scaffolding; it follows the P5 requirement that intermediate states need explicit dissolution/close conditions. chatgpt-review-cdad1953-93b7-42…

2.5. Top-down PM intent review

Compliant — the PR preserves the highest-level intent. The project’s fixed-point target is not “make a suite exist”; it is bit-identical self-emission with the hand-maintained surface shrinking toward zero. chatgpt-review-a4c46361-3fd5-4f…

This audit keeps that semantic bar intact by saying gate #16 is not dispatch-eligible (docs/audit/r3-gap3-fixed-point-precondition-coordination-2026-05-13.md:9), by requiring Grounding Rust+Python and SG-0/T-LP closure instead of substituting scattered planning prose (:14-15, :37-38), and by requiring Row A + Row B + Row C plus non-Rust Row-B byte-stability verifier work before claiming the strong suite executable (:39). I do not see a PM-level dilution where a must-have target becomes optional, where dissolution becomes permanent scaffolding, or where hand-written implementation is added against the bootstrap/generated direction.

3. Verdict

APPROVE

The diff is a docs-only coordination audit, and its load-bearing decisions are conservative: it blocks premature fixed-point dispatch, routes evidence back to the existing ledger authorities, and avoids introducing new substrate, Rust code, tests, or scaffolding. I found no diff-cited invariant violation.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: dcf0caab · Trigger: schedule
• Thinking: 157s wall

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⚠️ The existing unresolved blocking comment still applies; no additional blocking concerns found.