# Ask Codex

> Asks Codex CLI for coding assistance. Use for getting a second opinion, code generation, debugging, or delegating coding tasks.

- Skill: `hiroro-work/ask-codex` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add hiroro-work/ask-codex`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hiroro-work/ask-codex/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: hiroro-work (https://skillmd.com/u/hiroro-work)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/hiroro-work/ask-codex

---


# Ask Codex

Executes the local `codex` CLI to get coding assistance.

**Note:** This skill requires the `codex` CLI to be installed and available in your system's PATH.

## Quick start

Run a single query with `codex exec`:

```bash
codex exec "Your question or task here"
```

## Common options

| Option | Description |
|--------|-------------|
| `-m MODEL` | Specify model |
| `-C DIR` | Set working directory |
| `--full-auto` | Enable automatic execution with workspace-write sandbox |

> For all available options, run `codex exec --help`

## Resume a session

Use `exec resume --last` to continue the most recent session with a follow-up prompt:

```bash
codex exec resume --last "Your follow-up prompt"
```

> **Note:** `exec`-level flags such as `-C` and `--full-auto` are not accepted by `exec resume` — the resumed session inherits the original session's working directory.
> To adjust the sandbox on resume, use `-c sandbox_mode="workspace-write"`; `-m MODEL` remains available.

## Examples

**Ask a coding question:**

```bash
codex exec "How do I implement a binary search in Python?"
```

**Analyze code in a specific directory:**

```bash
codex exec -C /path/to/project "Explain the architecture of this codebase"
```

**Use a specific model:**

```bash
codex exec -m gpt-5.3-codex "Write a function that validates email addresses"
```

**Let Codex make changes automatically:**

```bash
codex exec --full-auto "Add error handling to all API endpoints"
```

## Notes

- Codex runs non-interactively with `exec` subcommand
- By default, output goes to stdout and no files are modified without approval
- Use `--full-auto` for automatic execution within sandbox constraints
- The command inherits the current working directory unless `-C` is specified