opencode

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# OpenCode CLI

Use [OpenCode](https://opencode.ai) as an autonomous coding worker orchestrated by Hermes terminal/process tools. OpenCode is a provider-agnostic, open-source AI coding agent with a TUI and CLI.

## When to Use

- User explicitly asks to use OpenCode
- You want an external coding agent to implement/refactor/review code
- You need long-running coding sessions with progress checks
- You want parallel task execution in isolated workdirs/worktrees

## Prerequisites

- OpenCode installed: `npm i -g opencode-ai@latest` or `brew install anomalyco/tap/opencode`
- Auth configured: `opencode auth login` or set provider env vars (OPENROUTER_API_KEY, etc.)
- Verify: `opencode auth list` should show at least one provider
- Git repository for code tasks (recommended)
- `pty=true` for interactive TUI sessions

## Binary Resolution (Important)

Shell environments may resolve different OpenCode binaries. If behavior differs between your terminal and Hermes, check:

```
terminal(command="which -a opencode")
terminal(command="opencode --version")
```

If needed, pin an explicit binary path:

```
terminal(command="$HOME/.opencode/bin/opencode run '...'", workdir="~/project", pty=true)
```

## One-Shot Tasks

Use `opencode run` for bounded, non-interactive tasks:

```
terminal(command="opencode run 'Add retry logic to API calls and update tests'", workdir="~/project")
```

Attach context files with `-f`:

```
terminal(command="opencode run 'Review this config for security issues' -f config.yaml -f .env.example", workdir="~/project")
```

Show model thinking with `--thinking`:

```
terminal(command="opencode run 'Debug why tests fail in CI' --thinking", workdir="~/project")
```

Force a specific model:

```
terminal(command="opencode run 'Refactor auth module' --model openrouter/anthropic/claude-sonnet-4", workdir="~/project")
```

## Interactive Sessions (Background)

For iterative work requiring multiple exchanges, start the TUI in background:

```
terminal(command="opencode", workdir="~/project", background=true, pty=true)
# Returns session_id

# Send a prompt
process(action="submit", session_id="<id>", data="Implement OAuth refresh flow and add tests")

# Monitor progress
process(action="poll", session_id="<id>")
process(action="log", session_id="<id>")

# Send follow-up input
process(action="submit", session_id="<id>", data="Now add error handling for token expiry")

# Exit cleanly — Ctrl+C
process(action="write", session_id="<id>", data="\x03")
# Or just kill the process
process(action="kill", session_id="<id>")
```

**Important:** Do NOT use `/exit` — it is not a valid OpenCode command and will open an agent selector dialog instead. Use Ctrl+C (`\x03`) or `process(action="kill")` to exit.

### TUI Keybindings

| Key | Action |
|-----|--------|
| `Enter` | Submit message (press twice if needed) |
| `Tab` | Switch between agents (build/plan) |
| `Ctrl+P` | Open command palette |
| `Ctrl+X L` | Switch session |
| `Ctrl+X M` | Switch model |
| `Ctrl+X N` | New session |
| `Ctrl+X E` | Open editor |
| `Ctrl+C` | Exit OpenCode |

### Resuming Sessions

After exiting, OpenCode prints a session ID. Resume with:

```
terminal(command="opencode -c", workdir="~/project", background=true, pty=true)  # Continue last session
terminal(command="opencode -s ses_abc123", workdir="~/project", background=true, pty=true)  # Specific session
```

## Common Flags

| Flag | Use |
|------|-----|
| `run 'prompt'` | One-shot execution and exit |
| `--continue` / `-c` | Continue the last OpenCode session |
| `--session <id>` / `-s` | Continue a specific session |
| `--agent <name>` | Choose OpenCode agent (build or plan) |
| `--model provider/model` | Force specific model |
| `--format json` | Machine-readable output/events |
| `--file <path>` / `-f` | Attach file(s) to the message |

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