docs: update project documentation for v0.9.9.1

ARCHITECTURE.md: added {{CODEX_PLAN_REVIEW}} to placeholder table.
CHANGELOG.md: added v0.9.9.1 entry for outside voice feature.
VERSION: bumped to 0.9.9.1.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ARCHITECTURE.md

@@ -205,6 +205,7 @@ Templates contain the workflows, tips, and examples that require human judgment.
 | `{{DESIGN_METHODOLOGY}}` | `gen-skill-docs.ts` | Shared design audit methodology for /plan-design-review and /design-review |
 | `{{REVIEW_DASHBOARD}}` | `gen-skill-docs.ts` | Review Readiness Dashboard for /ship pre-flight |
 | `{{TEST_BOOTSTRAP}}` | `gen-skill-docs.ts` | Test framework detection, bootstrap, CI/CD setup for /qa, /ship, /design-review |
+| `{{CODEX_PLAN_REVIEW}}` | `gen-skill-docs.ts` | Optional cross-model plan review (Codex or Claude subagent fallback) for /plan-ceo-review and /plan-eng-review |
 
 This is structurally sound — if a command exists in code, it appears in docs. If it doesn't exist, it can't appear.
 

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.9.9.1] - 2026-03-22 — Outside Voice
+
+### Added
+
+- **Plan reviews now offer an independent second opinion.** After all review sections complete in `/plan-ceo-review` or `/plan-eng-review`, you can get a "brutally honest outside voice" from a different AI model (Codex CLI, or a fresh Claude subagent if Codex isn't installed). It reads your plan, finds what the review missed — logical gaps, unstated assumptions, feasibility risks — and presents findings verbatim. Optional, recommended, never blocks shipping.
+- **Cross-model tension detection.** When the outside voice disagrees with the review findings, the disagreements are surfaced automatically and offered as TODOs so nothing gets lost.
+- **Outside Voice in the Review Readiness Dashboard.** `/ship` now shows whether an outside voice ran on the plan, alongside the existing CEO/Eng/Design/Adversarial review rows.
+
+### Changed
+
+- **`/plan-eng-review` Codex integration upgraded.** The old hardcoded Step 0.5 is replaced with a richer resolver that adds Claude subagent fallback, review log persistence, dashboard visibility, and higher reasoning effort (`xhigh`).
+
 ## [0.9.9.0] - 2026-03-21 — Harder Office Hours
 
 ### Changed

VERSION

@@ -1 +1 @@
-0.9.9.0
+0.9.9.1