---
title: "Commands"
description: ""
---

Custom commands turn a named prompt template into a slash command. Type the
command in the TUI, followed by any arguments:

```text
/review src/auth
```

## Configure with Markdown

OpenCode discovers `.md` command files in `commands/` directories:

```text
~/.config/opencode/commands/       # Global
.opencode/commands/                # Project
```

Files may be nested; for example, `.opencode/commands/team/review.md` defines
`/team/review`. Files with other extensions, including `.mdx`, are not
discovered.

```md title=".opencode/commands/review.md"
---
description: Review code for correctness and missing tests
agent: plan
model: anthropic/claude-sonnet-4-5#high
---

Review $ARGUMENTS. Report bugs first, then missing tests.
```

The file body, with surrounding whitespace removed, is the command template.
JSON and Markdown commands share one registry. Project definitions take
precedence over global definitions, and a later definition can override a
built-in or earlier command with the same name. Changes are reloaded
automatically.

Run it with:

```text
/review src/auth
```

## Configure with JSON

Add commands under the `commands` key in any OpenCode JSON or JSONC
[configuration file](/config). Each entry's key is the command name and
`template` is required.

```jsonc title="opencode.jsonc"
{
  "$schema": "https://opencode.ai/config.json",
  "commands": {
    "review": {
      "description": "Review code for correctness and missing tests",
      "template": "Review $ARGUMENTS. Report bugs first, then missing tests.",
      "agent": "plan",
      "model": "anthropic/claude-sonnet-4-5#high"
    }
  }
}
```

## Fields

| Field | Required | Behavior |
| --- | --- | --- |
| `template` | JSON only | Prompt template. In a Markdown command, the file body supplies it. |
| `description` | No | Text shown with the command in autocomplete. |
| `agent` | No | Agent selected before the prompt runs. |
| `model` | No | Model override in `provider/model` or `provider/model#variant` format. |
| `subtask` | No | Accepted as a boolean, but currently has no execution effect in V2. |

The four optional fields can be used in JSON or YAML frontmatter. Do not put
`template` in frontmatter because the Markdown body always supplies it.

## Arguments

Use `$ARGUMENTS` for the complete argument string:

```md title=".opencode/commands/component.md"
---
description: Create a component
---

Create a typed React component named $ARGUMENTS.
```

```text
/component Button
```

Use `$1`, `$2`, and higher numbers for parsed positional arguments. Single and
double quotes group text containing spaces and are removed during parsing.

```md title=".opencode/commands/check.md"
---
description: Check one area with a specific focus
---

Check $1. Focus on $2.
```

```text
/check src/auth "error handling and missing tests"
```

The highest-numbered positional placeholder present in the template consumes
that argument and all remaining arguments. For example, if a template contains
only `$1`, then `$1` receives the full parsed argument list. Missing positions
become empty strings.

If a template contains neither positional placeholders nor `$ARGUMENTS`,
OpenCode appends non-empty arguments to the template after a blank line.

## Shell interpolation

Wrap a shell command in `!` followed by backticks to insert its output before
the prompt is submitted:

```md title=".opencode/commands/review-diff.md"
---
description: Review the current diff
---

Review this diff:

!`git diff --stat && git diff`
```

OpenCode runs each interpolation with the configured shell in the active
project location and inserts its combined output into the template. Argument
interpolation happens first, so avoid placing untrusted arguments inside shell
interpolations.

<Warning>
  Shell interpolations run when the command is evaluated, outside the agent's
  tool permission flow. Only use commands from sources you trust.
</Warning>

No other template interpolation is performed. In particular, an `@path`
written into a stored template remains ordinary prompt text; V2 does not
automatically attach that file.

## Agent, model, and execution

Running a command evaluates its arguments and shell blocks, submits the result
as a durable user prompt in the current session, and schedules normal model
execution.

If `agent` is set, it overrides the agent selected when the command was
invoked and becomes the session's active agent. If `model` is set, it overrides
the model. Otherwise, a model configured on the command's agent takes
precedence over the model selected at invocation.

Although `subtask` is accepted in JSON and frontmatter, V2 currently ignores
it: commands run in the current session and do not create a child session.
Selecting an agent whose mode is `subagent` also does not turn the command into
a subtask.