Add memory files for review-plan and review-spec skills

Skill documentation for the new plan/spec review skills. Each file
covers purpose, usage, how it works, referenced best practice files,
and gotchas.

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

MEMORY.md

@@ -25,6 +25,8 @@
 - [/housekeeping](memory/skill-housekeeping.md) — Cross-project health check: git status, unreflected logs, skill validation, pipeline recommendations
 - [/decompose](memory/skill-decompose.md) — Break tasks into subtasks with dependency graph, write .agent-tasks.json for container agent orchestration
 - [/orchestrate](memory/skill-orchestrate.md) — Check task state, launch container agents in git worktrees. Use `/loop 2m /orchestrate` for auto-polling
+- [/review-plan](memory/skill-review-plan.md) — Review plan against best practices (API, security, specs, TDD) before implementation
+- [/review-spec](memory/skill-review-spec.md) — Review spec for structure, requirement quality, security coverage, and testability
 
 ## References
 
@@ -36,3 +38,4 @@
 - [Process Lessons](memory/process-lessons.md) — Working rules: git-status at session start, plan mode for architecture, hook exit codes, ssh-agent
 - [Gitea Gotchas](memory/gotchas-gitea.md) — Push permission denied when repo created by different API user than SSH alias
 - [Skills Gotchas](memory/gotchas-skills.md) — Broken symlinks under set -e, mid-session skill discovery limitation
+- [Statusline Gotchas](memory/gotchas-statusline.md) — set-topic.sh bootstrap race condition, md5sum -n flag consistency