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Request: - Add a project-local audit skill for checking IPO data completeness, sufficiency, and analysis self-consistency. Changes: - Create .codex/skills/audit/SKILL.md. - Define audit scope across source integrity, stage data completeness, data sufficiency, and reasoning consistency. - Separate responsibilities from archivist fact updates and analyst investment conclusions. Verification: - Reviewed the new skill body. - Ran git diff --check. - Confirmed the project-local skill list includes archivist, analyst, and audit.