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## Why Codex contributors and agents need repository-scoped guidance for choosing compatible Rust types for operating system paths during the ongoing URI migration. Keeping the guidance in the repository makes the app-server and exec-server rules available consistently without relying on a personal skill installation. ## What - Add the `path-types` skill at `.codex/skills/path-types/SKILL.md`. - Document the intended uses of `ApiPathString`, `PathUri`, `AbsolutePathBuf`, and `PathBuf` across protocol, internal, and shared dependency boundaries. - Keep migrations of existing types limited to explicit requests and proportional edits. ## Validation - Validated the skill structure with skill-creator's `quick_validate.py`.