R3 gate #5: lens_apply_dot_rs_retired (T-LensProducer-Retirement)

[briansrls]

Auto-opened by session-dashboard for session valiant-fox-455.
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Summary

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Test plan

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[briansrls]

Verified the codex dashboard-only approval against the current PR branch. The cited gate state still matches the tree: lens_apply.rs is absent, sg0_census_test.rs::r3_gate_5_lens_apply_rs_stays_retired guards the retirement, and the PR only promotes the existing gate status/dispatch ledger. No code change is needed for this approval item. — sent from valiant-fox-455

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-pro
• Commit: cd3abae7 · Trigger: manual
• Comparison: main @ 49631883 ... session/valiant-fox-455 @ cd3abae7
• Conversation: View conversation

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1. Story of the diff

This is a docs-only R3 program-plan closure update for gate #5, lens_apply_dot_rs_retired. The PR changes the gate from DECLARED to CONSUMER_LANDED + PASSING by recording three closure facts: src/v3/compiler/src/lens_apply.rs is absent, sg0_census_test.rs carries the retirement ratchet, and the SG-0 non-test census no longer lists the retired path at docs/r3-program-plan.md:232. It also updates the lane dashboard so T-LensProducer-Retirement remains YELLOW rather than over-claiming lane completion: gate #5 is closed, gate #7 is still sequencing-held, and the remaining bounded host surface in lens_declaration_apply.rs is explicitly tracked under gate #66 until PB-Runtime owns lens application/reflection end-to-end at docs/r3-program-plan.md:429.

2. Invariant categories

1. LAYER MODEL (substrate vs implementation).

N/A — the diff touches only docs/r3-program-plan.md; it does not add or mutate Dag substrate types, behavior variants, fields, or compiler implementation code.

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

Compliant — Progress Is Dissolution is handled narrowly: docs/r3-program-plan.md:232 closes only the retired lens_apply.rs path, while explicitly keeping the remaining lens_declaration_apply.rs residual tracked by lens_producer_files_remaining / gate #66. That matches the P5 requirement that scaffolds/residuals carry named dissolution paths rather than becoming steady state. chatgpt-review-cf16d7b6-27a8-4a…

1. CODING.md.

N/A — no Rust production code, functions, methods, APIs, or error/result shapes are introduced or modified. The CODING.md data + pure-functions discipline is not exercised by this docs-only diff.

1. TESTING.md.

Compliant — the PR does not add a test, but it records that the retirement is already guarded by sg0_census_test.rs::r3_gate_5_lens_apply_rs_stays_retired at docs/r3-program-plan.md:429 and repeats the same ratchet/census evidence at docs/r3-program-plan.md:232. For a status-closure doc PR, that is the right level: the reviewable change is the plan state, and the diff does not create a new behavior needing a new test. The broader test direction remains consistent with .dag/generated test migration rather than new Rust residuals. chatgpt-review-93f44d4b-3bff-45…

1. LOCKED DESIGN DECISIONS.

Compliant — the diff does not weaken Pure Bootstrap to Zero or PB-Runtime. The design authority says PB-Runtime is the lane that generates test_runner.rs, lens_apply.rs, lens_testgen.rs, and post_emit_verifier.rs from .dag authorities, making the lens evaluator data plus a tiny generic interpreter. chatgpt-review-5c17f5d6-5599-4c…

The PR’s language preserves that meaning: docs/r3-program-plan.md:232 closes only the retired file path and docs/r3-program-plan.md:429 keeps the remaining lens application/reflection host surface blocked on PB-Runtime/gate #66.

1. TRACKED vs UNTRACKED DEBT.

Compliant — no new scaffold, TODO, or temporary shape is introduced. The only residual named in the added text is bounded and tracked: lens_declaration_apply.rs remains until “PB-Runtime owns lens application/reflection end-to-end” at docs/r3-program-plan.md:429, and the same residual is called out as gate #66 at docs/r3-program-plan.md:232.

2.5. Top-down PM intent review

Compliant — the highest-level intent is to shrink hand-maintained compiler surfaces toward zero and keep compiler internals emitted from .dag, with SG-0 census as the live count authority. chatgpt-review-793d47bd-572b-4e…

The PR faithfully preserves that intent: it marks a specific retired file path closed at docs/r3-program-plan.md:232 while refusing to overstate the lane, because docs/r3-program-plan.md:429 keeps T-LensProducer-Retirement yellow and names the remaining blockers. No must-have target becomes optional, no removal goal becomes permanent scaffolding, and no hand-written implementation is added.

3. Verdict

APPROVE — I found no diff-cited invariant violation. The PR is a narrow documentation closure that records the gate #5 retirement evidence while keeping the remaining LensProducer residuals explicit and tracked.