This PR adds a command history persistence feature to Codex CLI that:
1. **Stores command history**: Commands are saved to
`~/.codex/history.json` and persist between CLI sessions.
2. **Navigates history**: Users can use the up/down arrow keys to
navigate through command history, similar to a traditional shell.
3. **Filters sensitive data**: Built-in regex patterns prevent commands
containing API keys, passwords, or tokens from being saved.
4. **Configurable**: Added configuration options for history size,
enabling/disabling history, and custom regex patterns for sensitive
content.
5. **New command**: Added `/clearhistory` command to clear command
history.
## Code Changes
- Added `src/utils/storage/command-history.ts` with functions for
history management
- Extended config system to support history settings
- Updated terminal input components to use persistent history
- Added help text for the new `/clearhistory` command
- Added CLAUDE.md file for guidance when working with the codebase
## Testing
- All tests are passing
- Core functionality works with both input components (standard and
multiline)
- History navigation behaves correctly at line boundaries with the
multiline editor
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