v0.15.0-alpha.0 — M14 Reviewer panel v1

M14 — Reviewer panel v1 (first simultaneous-provider surface)

code-oz gains its first simultaneous-provider surface: cross-family reviewer panels at the REVIEW gate, with a five-layer same-family-voter defense, canonical verdict computation, and a rule-21 ship-gate metric.

This is the first product feature where multiple provider families look at the same artifact in parallel. Per rule 21, the surface ships with a measurable risk-reduction signal (the doctor --panel-baseline rule-21 metric) so its complexity is justified against the single-provider baseline.

What shipped

• Cross-family reviewer panels — company.reviewer.panel config opens a panel REVIEW gate; runReview dispatches to runReviewPanel when configured
• Canonical verdict computation — pure helper computeCanonicalPanelVerdict with T1–T9 quorum table coverage
• 5-layer same-family-voter defense — config-load + agent-loader + parser + runtime registry resolution + verdict gate, each emitting distinct event codes
• Panel-mode REVIEW.md schema — multi-reviewer sections + Synthesis block + parse-time quorum recomputation; mode-aware approve parser accepts review_panel_completed
• Multi-round panel lifecycle — prior REVIEW.md carry-forward + staging resume guard via review_panel_resume_mismatch
• Aggregate panel budget preflight — reuses M13 budget_warning; assertPanelWithinBudget wired into orchestrator before first panelist invocation
• doctor --panel-baseline — rule-21 ship-gate metric command emits review_panel_baseline_completed with all 4 thresholds PASS
• Adversarial parser hardening — authority-impact source consistency + cross-section verdict invariant
• Full panel event taxonomy — layer-5 quorum backstop, complete validators

Cross-model peer review

• 1 planning round (R0): accept-with-modifications, 4 pushbacks
• 8 implementation rounds (R1–R8): R1 7×block-push → R8 0 findings, severity decreased monotonically
• 1 final pre-tag verification (R9): tag-target integrity + no-tech-debt rule both pass
• All 10 block-push items closed in commits before tag (no deferred tech debt per non-negotiable rule 20)

Numbers

• 35 commits on feat/m14-reviewer-panel
• 2425 tests pass / 1 skip / 0 fail
• +179 new tests vs M13
• Typecheck clean
• Tag points to 3572514 — the SHA Codex R9 blessed

Trail

• Contract: docs/contracts/REVIEW_PANEL.md
• Reviews: docs/research/CODEX_REVIEW_M14.md + CODEX_REVIEW_M14_R2..R9.md
• Planning: docs/research/CODEX_BRIEFING_M14.md + CODEX_RESPONSE_M14.md

Next milestone

M15 — Debate-policy scheduler v1 (single-opponent only).