docs(r1c-d): manager status row + RED gate surfacing to PB

[briansrls]

Summary

• Trailing R1C-D coordination slice (Option 1 per R1 Closure direction at inbox #849) following test(v3): R1C-D PB census .dag suite + integration receipt #1050's six-claim fixture/receipt landing on main (5f405cc8e). Adds the manager-surface acceptance lines that don't live in test(v3): R1C-D PB census .dag suite + integration receipt #1050's code diff: lane status row + cross-manager RED-gate routing path to the Pure Bootstrap to Zero program.
• Records measured 1/6 green at landing (D.3 pb_self_compile_fixed_point); D.1/D.2/D.4/D.5/D.6 RED with concrete dissolution-work table mapping each gate → blocking PB workstream. Pacing stays owned by PB program; this brief is the hand-off surface.
• Bundled gap-fix: corrects the test(v3): R1C-D PB census .dag suite + integration receipt #1050 test docstring (claimed 3/6 RED; actual is 5/6 RED at HEAD). Per Closure direction "minimal follow-up if a gap surfaces, not a fork." No code/predicate changes — comment only.

Test plan

• cargo fmt --all --check clean (pre-push hook).
• cargo test -p v3-compiler --test integration r1c_d_pb_census_gates_suite_evaluates_through_runner passes (the test(v3): R1C-D PB census .dag suite + integration receipt #1050 receipt is unaffected; only its docstring shifted).
• Counts in r1-closure-manager.md cross-checked against live runner output at HEAD 5f405cc8e.

— sent from nimble-seal-850 (inbox #1054); reply at #1054

🤖 Generated with Claude Code

[briansrls]

Review metadata

• Provider / model: cursor / composer-2
• Commit: 2adba3a0 · Trigger: schedule
• Thinking: 17s wall

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Review complete. The diff is two edits: a brief update plus test module doc comment alignment. No logic, types, or test assertions changed.

Findings: None. Nothing in the diff conflicts with the referenced rubric in a concrete way: it’s documentation and rustdoc on an existing integration test, not new substrate or parallel authority in code. The “Documentation Describes Live State” concern is addressed in-doc via an explicit refresh instruction and a pinned Observed (HEAD 5f405cc8e) column, which is a reasonable pattern for a status hand-off, not an ungrounded claim in executable code.

Verdict: APPROVE — Small, consistent doc update: R1C-D status row, RED-gate table for PB hand-off, and matching rustdoc in r1c_d_pb_census_gates_test.rs (five RED / one green, gate names, PB work). No changes under review for fail-closed modeling, test hermeticity, or coding style beyond comment text.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 2adba3a0 · Trigger: schedule
• Thinking: 121s wall

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Non-blocking — Strengths

• docs/briefs/r1-closure-manager.md The RED gate surfacing keeps the PB debt documented, bounded by named gates, and tied to concrete dissolution work instead of hiding it behind R1 close status.

✅ No blocking concerns; this is a docs/comment alignment PR and the added status surface matches the tracked-bridge discipline.