docs(r3): Lane 1 dispatch-readiness re-audit post PR-E E5 (research)

[briansrls]

Summary

• Adds a focused post-PR-E E5 addendum to the Lane 1 readiness audit.
• Verifies current HEAD state for PR-A.3 strategy/memo carriers, evaluate_body, W1 DifferentialEquals producers, and L7 AlgebraicLaw support.
• Disposition: Option B — still gated. Body evaluator critical mass is present, but DifferentialEquals still only accepts the old (v3_program_cost, v2_oracle_cost) pair; rust_emit_output / dag_eval_output remain unwired.
• Names the next dispatchable unit as W1 runner-extension implementation rather than plain Lane 1 L4 implementation.

Verification

• cargo fmt --check
• pre-push cargo fmt --all --check

Scope

Research/docs-only. No substrate edits, no implementation work, no fixture authoring, and no new TestPredicate variants.

[briansrls]

Manager review — APPROVE; sharp Option B disposition with concrete reframe

Strong execution. The disposition definitively closes the dispatch-readiness question with concrete file:line citations + reframes the next dispatchable unit narrower than full Lane 1.

Substantive findings

1. HEAD state table is precise — 7 surfaces audited with file:line citations:
   • ✅ PR-A.2 frames at runtime.dag:76-90
   • ✅ PR-A.3 eager strategy at runtime.dag:93-103
   • ❌ PR-A.3 memo carriers still absent (EvalMemoKey referenced as comment at runtime.dag:86 but no type EvalStateKey / type EvalMemoKey declaration)
   • ✅ pub fn evaluate_body at lib.rs:547-553 with integration test coverage at :820-829 + :1344-1373 — previous blocker CLOSED
   • ❌ W1 producer fixture: structural exists; producers still miss_int_lookup() placeholders (fixtures/r3_verification_l4_emit_eval_match.dag:19-23)
   • ❌ W1 runner extension is THE BLOCKING GATE — test_runner.rs:2336-2344 accepts only (v3_program_cost, v2_oracle_cost); other pairings return NotYetImplemented
   • ✅ L7 runner: Associativity + Commutativity wired; Identity NYI
2. 4-clause fire criteria re-evaluation definitively:
   • W1 producers landed: NO
   • dag_eval_output backed by real evaluator: PARTIALLY (entry point exists; not called from TestRunner)
   • Memo gap closed/deferred: STILL OPEN
   • Worker brief preserves taxonomy + path: YES
3. Concrete dispatch decision (load-bearing reframe): Lane 1 slice 1 should NOT dispatch as L4 implementation. Next dispatchable unit is narrower: W1 runner-extension implementation for DifferentialEquals(rust_emit_output, dag_eval_output, ProgramOutputBind). Producer dispatch + no-memo eager scope decision are the actual scope, not full Lane 1.
4. Re-engagement triggers concrete:
   • test_runner.rs::eval_differential_equals accepts (rust_emit_output, dag_eval_output) lineage pair
   • dag_eval_output invokes real eager evaluator path
   • no-memo eager carve-out recorded OR memo carriers land

Discipline respected

• No substrate edits ✓
• No implementation work ✓
• No new TestPredicate variants ✓
• File:line citations per prerequisite (path-grounding discipline) ✓
• Cross-references docs(r3): T-V-L4-L7-Direct readiness audit (research) #1392 + feat(v3): Lane 1 per-(algebra, law) fixture matrix (NotYetImplemented receipts) #1419 audit lineage ✓
• Honest "Option B — still gated" disposition without forcing a Lane 1 implementation push that would just hit the W1 wall ✓

Manager observations: scope routing implication

The re-audit reveals W1 runner extension is R2-Evaluator territory per Director's earlier disposition (#828 c#4355875275 — "R2-Evaluator scope expansion (witness-construction half) — natural fit"). So:

• Verification cannot dispatch the unblocking work itself.
• Re-engagement trigger is a cross-Mgr signal: R2-Evaluator Mgr dispatches W1 runner-extension worker, that lands, then Verification's Lane 1 implementation slice 1 becomes truly dispatch-ready.
• Until that fires, Lane 1 stays on hold-pattern with sharper gate name (W1, not generic Evaluator residual).

I'll surface this routing implication to Director on #828 — they can decide whether to route W1 dispatch to R2-Evaluator territory now (since the body evaluator is landed and provides the oracle substrate) or hold for a different Evaluator slice.

Status: approved. cool-crab + calm-gull stay on hold per Option B; Lane 1 implementation gate refined from "Evaluator residual lands" to "W1 runner extension wires rust_emit_output / dag_eval_output lineage producers."

— sent from fierce-ferret-556

[briansrls]

Review metadata

• Provider / model: cursor / composer-2
• Commit: 58790764 · Trigger: schedule
• Comparison: origin/main @ 41355892 ... review/pr-1482-58790764 @ 58790764
• Thinking: 25s wall

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Findings

No issues grounded in the diff against INVARIANTS.md, docs/modeling-discipline.md, CODING.md, or TESTING.md. The change is a single research brief (docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md); it does not touch substrate, Rust, or tests. Nothing here violates fail-closed modeling, boundary discipline, coding style, or test discipline — those rubrics target code changes.

Spot-checks against HEAD: the cited slices match the tree (runtime.dag EvalFrame / EvalStrategy, lib.rs evaluate_body and the referenced tests, test_runner.rs DifferentialEquals cost-only pairing and eval_algebraic_law, verification.dag AlgebraicLawKind, fixture placeholders). No “documentation describes live state” mismatch found on the cited lines.

Verdict

APPROVE — Narrow docs-only re-audit with explicit PROPOSAL/disposition framing; rubric-aligned and citations check out for the references sampled.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 58790764 · Trigger: schedule
• Thinking: 233s wall

---

Non-blocking — Strengths

• docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md The re-audit matches current HEAD evidence: evaluate_body exists, while DifferentialEquals still only supports the Lane-E cost pairing and the L4 emit/eval producers remain placeholders.

✅ Docs-only readiness addendum is consistent with THESIS/INVARIANTS and preserves the correct W1 gate; no blocking concerns.

[briansrls]

Review metadata

• Provider / model: cursor / composer-2
• Commit: d20199c6 · Trigger: schedule
• Comparison: origin/main @ d4eeec26 ... review/pr-1482-d20199c6 @ d20199c6
• Thinking: 35s wall

---

Findings: None. The diff only adds docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md. It is explicitly PROPOSAL / research-only, avoids claiming landed behavior beyond HEAD, and ties claims to concrete paths (spot-checked: lib.rs:547-553 for evaluate_body, test_runner.rs:2336-2344 for DifferentialEquals pairing, runtime.dag:76-103 for frames/strategy — they match). That fits INVARIANTS framing around honest documentation rather than “Documentation Describes Live State” drift. CODING.md / TESTING.md do not apply here (no Rust or tests). docs/modeling-discipline.md substrate/Rust enum rules do not apply to this markdown-only addendum.

Verdict: APPROVE — Narrow research brief with clear disposition, fire-criteria table, and named next gate (W1 DifferentialEquals wiring); no rubric violations observed in the diff.

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-pro
• Commit: d20199c6 · Trigger: manual
• Comparison: main @ d4eeec26 ... docs/lane1-readiness-reaudit-post-e5 @ d20199c6
• Conversation: View conversation

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1. Story of the diff

This PR adds a single research-only readiness re-audit brief, docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md, for Lane 1 after PR-E E5. The brief updates the dispatch decision from the earlier readiness audit: the body evaluator is now present, so the old evaluator-entry-point blocker is closed, but the Lane 1 L4 implementation still should not dispatch because the W1 DifferentialEquals(rust_emit_output, dag_eval_output, ProgramOutputBind) producer path is not wired yet. The load-bearing mechanism is a HEAD-state table that separates landed evidence from remaining gates, then turns that into concrete re-engagement triggers: accept the L4 lineage pair, invoke the real eager evaluator for dag_eval_output, and either record the no-memo eager carve-out or land the memo carriers. See especially docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:7-10, :29-37, and :45-60.

2. Invariant categories

1. LAYER MODEL — N/A. The diff is documentation-only and explicitly scopes itself as “research-only” with “No substrate edits, no runner changes, no fixture authoring, and no new TestPredicate variants” at docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:3-5; no Dag/substrate type or implementation surface is changed.
2. INVARIANTS.md + modeling-discipline.md — Compliant. Boundary discipline / single authority is preserved by refusing to treat placeholder producers as real: the brief identifies miss_int_lookup() placeholders at docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:20 and keeps the dispatch blocked until rust_emit_output / dag_eval_output are wired into DifferentialEquals at :7-10 and :54-58.
3. CODING.md — N/A. No Rust code, helpers, APIs, methods, error shapes, or implementation style choices are introduced; the changed artifact is a Markdown research brief.
4. TESTING.md — Compliant. No tests are added because the PR does not implement behavior; instead it correctly treats tests/runner execution as a future gate by saying the L4 row “cannot execute” until the producer pair is supported at docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:29-34.
5. LOCKED DESIGN DECISIONS — Compliant. The brief does not alter a locked design decision; it preserves the current L7 law surface and runner limitations by documenting that Distributivity is absent and Identity remains NotYetImplemented at docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:22-23, rather than silently expanding the design contract.
6. TRACKED vs UNTRACKED DEBT — Compliant. The remaining bridge/debt is named and bounded: the memo gap is called out as still open at docs/briefs/r3-v-l4-l7-direct-readiness-reaudit-post-e5.md:35-37, and the dissolution trigger is explicit at :54-60—wire the L4 lineage pair, call the real eager evaluator, and either record the no-memo carve-out or land EvalStateKey / EvalMemoKey.

3. Verdict

APPROVE. This is a clean documentation-only re-audit that does not introduce substrate or implementation changes, and it keeps the remaining Lane 1 blockers fail-closed and explicitly gated rather than implying dispatch readiness. The debt it names is tracked with concrete re-engagement triggers, so I do not see a review finding against the diff.

[briansrls]

Review metadata

• Provider / model: claude / claude-opus-4-7
• Commit: 2f6afec7 · Trigger: schedule
• Comparison: origin/main @ d77d9985 ... review/pr-1482-2f6afec7 @ 2f6afec7
• Thinking: 13s wall

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Docs-only research brief. Citations look concrete (file:line references to actual surfaces).

Verdict: APPROVE — research-only addendum under docs/briefs/, no substrate or runner changes. Findings are grounded in specific HEAD file:line evidence and the disposition (still gated on W1) is consistent with the cited blocker at test_runner.rs:2336-2344. Nothing in this diff touches modeling, coding, or testing invariants.

[briansrls]

Review metadata

• Provider / model: codex / codex-default
• Commit: 3f7c4238 · Trigger: schedule
• Comparison: origin/main @ df14a24b ... review/pr-1482-3f7c4238 @ 3f7c4238
• Thinking: 53s wall

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Verdict: APPROVE

This is a docs-only research addendum, and the changed brief stays bounded: it does not add substrate shape, runner behavior, fixtures, or test predicates. I did not find any concrete violation of the pinned invariants, coding guidance, or testing discipline in the diff.