Add the S2_10 failure analyses (v4 gate stop, Gitea AuthGate 401, v6 slot delivery and localdocs cache poisoning), the SKILL.md/gpt compatibility report, the provider budget and reasoning check, revision strategy v.5, the v4 and v5.0.0 YAML backups, and the Stage 2 MEMORY entries. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>