path-types
Choose Rust types for operating system paths across the Codex repository. Use when defining new path-bearing types or explicitly migrating existing ones.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/openai/codex --skill path-types- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads path-types automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Path Types
Apply this guidance when defining new types. Change existing code only when explicitly requested, and keep edits minimal and proportional. Treat these rules as the target state of an ongoing migration; if compliance is difficult, ask the user how to proceed.
- In app-server protocol types, use
LegacyAppPathStringfor backwards compatibility during the URI migration. At the protocol boundary, convert it toPathUriand usePathUriinternally. For host-local logic, such as some config values, useAbsolutePathBuforPathBufinstead. - In exec-server protocol types, use
PathUri. Internally, usePathUriorAbsolutePathBufas appropriate. - In dependencies shared by both servers, use
PathUrior separate APIs that decouple their use cases. - Tool call arguments that the model is expected to generate should be deserialized as regular
Strings with feature-specific path handling code.
Migration requirements
Keep these requirements in mind while migrating code to conform with the above guidelines:
- existing app-server clients keep sending and receiving legacy native-path strings
- app-server can retain and manipulate foreign-platform path URIs
- exec-server APIs use file:// URIs
- local-only operation must not change model-visible text
- model tool arguments may contain raw relative or absolute paths for any OS
- path reasoning must work before the related environment has come online
- URIs cannot explicitly encode the executor’s path convention or operating system
- users must not configure the environment’s OS/path convention explicitly
- URIs should not yet be stored in rollouts, databases, or other persistent storage
- path conversion errors: fail-closed for security-relevant paths, fail-open for UI/diagnostics
- prefer small focused methods on
PathUriorLegacyAppPathStringover local helpers - represent
PathUrivalues as URIs in diagnostics
It is OK if the conversion between paths and URIs is somewhat lossy as long as it will do the right thing for real users.
Migrating to URIs should not add significant new failure modes. We will need to surface errors in some places that were previously infallible but it should be kept to a minimum.
FAQ
What does the path-types skill do?
Choose Rust types for operating system paths across the Codex repository. Use when defining new path-bearing types or explicitly migrating existing ones.
How do I install path-types?
Run npx skills add https://github.com/openai/codex --skill path-types in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/path-types/ (personal) or .claude/skills/path-types/ (project).
Which AI agents can use path-types?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is path-types safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains path-types?
It is published by openai in openai/codex. It has 210 recorded installs.
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