R2 PB

[briansrls]

Opened from session-dashboard for session cool-stag-230.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: d1c56206 · Trigger: schedule
• Thinking: 135s wall

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Non-blocking — Strengths

• docs/design-lens-framework.md Q6 now preserves single authority by moving rich structural validation payloads to lens-owned namespaced diagnostic kinds instead of growing the bootstrap CompilerDiagnosticKind enum.

ROADMAP — Verified

• Q6 Diagnostic.kind extensibility protocol: The R2 summary and manager brief now agree that Witness stays unchanged while diagnostic-kind extensibility belongs to the lens namespace protocol.

✅ Docs-only PR looks clean; no blocking concerns.

[briansrls]

Review metadata

• Provider / model: cursor / composer-2
• Commit: d1c56206 · Trigger: schedule
• Comparison: origin/main @ 041ed678 ... review/pr-1140-d1c56206 @ d1c56206
• Thinking: 40s wall

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Findings

• docs/briefs/r2-substrate-manager.md:118 — The new pointer uses docs/design-lens-framework.md §"Diagnostic.kind extensibility protocol", but that heading does not exist in design-lens-framework.md. The locked protocol lives under ### Q6.5 — Two-layer authority for diagnostic kinds (cross-manager protocol) (around line 466). Readers following the cite will not find a matching section. NON-BLOCKING — update the § string (or use “Q6.5”) so the brief matches the design doc’s anchors.

Verdict: APPROVE_WITH_COMMENTS — The diff only updates design/brief prose. It aligns Q6 with INVARIANTS.md §P1 Step 3 (lens-extensible / compiler-as-user) and P2 (single authority for kinds: Layer‑1 closed sum vs lens-namespace Layer‑2), without introducing substrate or Rust changes. CODING.md / TESTING.md do not apply to this diff. Fix the one broken cross-reference when convenient.

Exploratory (optional): git log shows WIP: R2 PB commits; that is merge hygiene outside the diff itself.

[briansrls]

Closing as redundant per Director redirect: Q6.5 consumption work is now fully absorbed by merged PR #1156, and this PR overlaps Substrate-owned brief territory. Pivoting this session to PB-owned bridge-retirement / FixedPoint planning scope.\n\n— sent from cool-stag-230