---
title: Agents overview
description: Pick the agent that writes the code. AO supports five today, and they're swappable per-project.
---

The agent is the piece that actually writes code. Everything else in AO — worktrees, runtimes, notifiers — is plumbing around it.

<Callout type="info">
**PR metadata is captured automatically.** Non-Claude-Code agents (Codex, Cursor, Aider, OpenCode) use `~/.ao/bin/gh` and `~/.ao/bin/git` PATH wrappers that intercept commands like `gh pr create` and record the resulting PR number and branch so the dashboard stays in sync. Claude Code uses PostToolUse hooks in `.claude/settings.json` instead — the same metadata is written through Claude Code's native hook system. Both approaches are set up transparently by AO; you don't need to configure anything.
</Callout>

## Supported agents

| Agent | Slot name | Binary | Session resume |
|---|---|---|---|
| [Claude Code](/docs/plugins/agents/claude-code) | `claude-code` | `claude` | ✅ `--resume` |
| [Codex](/docs/plugins/agents/codex) | `codex` | `codex` | ✅ `codex resume <threadId>` |
| [Cursor](/docs/plugins/agents/cursor) | `cursor` | `agent` | ❌ |
| [Aider](/docs/plugins/agents/aider) | `aider` | `aider` | ❌ |
| [OpenCode](/docs/plugins/agents/opencode) | `opencode` | `opencode` | ✅ via OpenCode session API |

<PluginGrid>
  <PluginCard name="Claude Code" logo="claude-code" href="/docs/plugins/agents/claude-code" description="Anthropic's CLI coding agent." />
  <PluginCard name="Codex" logo="codex" href="/docs/plugins/agents/codex" description="OpenAI's Codex CLI." />
  <PluginCard name="Cursor" logo="cursor" href="/docs/plugins/agents/cursor" description="Cursor Agent CLI." />
  <PluginCard name="Aider" logo="aider" href="/docs/plugins/agents/aider" description="Aider pair-programming CLI." />
  <PluginCard name="OpenCode" logo="opencode" href="/docs/plugins/agents/opencode" description="OpenCode terminal agent." />
</PluginGrid>

## Choosing

- **Want session resume** (pick up where you left off)? Claude Code, Codex, or OpenCode.
- **One-shot per session** is fine? Any of the five.
- **Pair-programming style editor**? Aider.
- **Native IDE-like behavior in the terminal**? Cursor.

## How AO talks to them

Two patterns exist:

- **Agent-native hooks** — Claude Code ships a PostToolUse hook in `.claude/settings.json`. AO's workspace bootstrap installs it; the agent writes activity events directly to AO's JSONL.
- **PATH wrappers** — Codex, Cursor, Aider, and OpenCode don't have a hook system. AO installs small shell wrappers in `~/.ao/bin/gh` and `~/.ao/bin/git` and prepends them to `PATH`. When the agent runs `gh pr create` or `git commit`, the wrapper records metadata (PR number, branch, etc.) so the dashboard knows what the agent did.

Neither approach requires you to change your agent's config — AO sets it up transparently.

## Mixing agents

Per-project overrides:

```yaml
agent: claude-code       # global default
projects:
  api:
    repo: myorg/api
    agent: codex
  web:
    repo: myorg/web
    agent: cursor
```

You can also override at spawn time:

```bash
ao spawn 42 --agent codex
```

Great for A/B testing which agent does better on a specific kind of issue.