llmx/docs/prompts.md

## Custom Prompts

Save frequently used prompts as Markdown files and reuse them quickly from the slash menu.

- Location: Put files in `$CODEX_HOME/prompts/` (defaults to `~/.codex/prompts/`).
- File type: Only Markdown files with the `.md` extension are recognized.
- Name: The filename without the `.md` extension becomes the slash entry. For a file named `my-prompt.md`, type `/my-prompt`.
- Content: The file contents are sent as your message when you select the item in the slash popup and press Enter.
- Arguments: Local prompts support placeholders in their content:
  - `$1..$9` expand to the first nine positional arguments typed after the slash name
  - `$ARGUMENTS` expands to all arguments joined by a single space
  - `$$` is preserved literally
  - Quoted args: Wrap a single argument in double quotes to include spaces, e.g. `/review "docs/My File.md"`.
- How to use:
  - Start a new session (Codex loads custom prompts on session start).
  - In the composer, type `/` to open the slash popup and begin typing your prompt name.
  - Use Up/Down to select it. Press Enter to submit its contents, or Tab to autocomplete the name.
- Notes:
  - Files with names that collide with built‑in commands (e.g. `/init`) are ignored and won’t appear.
  - New or changed files are discovered on session start. If you add a new prompt while Codex is running, start a new session to pick it up.