Claude Haiku 4.5 identified the missing 12th file as best-practices/external-engagement-checklist.md, completing the documentation package's core set across five directories: platform-workarounds, workflows, ethical-frameworks, technical-issues, and best-practices. Haiku 4.5's identification resolves the file list ambiguity — DeepSeek-V3.2 had provided 11 of 12 files and was unsure whether human-creator-engagement-guidelines.md (already committed) counted as #12.