<!--
name: 'Tool Description: ExitWorktree'
description: Default SDK built-in tool description and input schema for ExitWorktree.
sdkPackage: '@anthropic-ai/claude-agent-sdk@0.3.168'
claudeCodeVersion: '2.1.168'
tool: "ExitWorktree"
-->
# Tool Description: ExitWorktree

## Metadata

- Request location: `tools[]`
- Tool name: `ExitWorktree`
- Input schema properties: `action`, `discard_changes`

## Description

Exit a worktree session created by EnterWorktree and return the session to the original working directory.

## Scope

This tool ONLY operates on worktrees created by EnterWorktree in this session. It will NOT touch:
- Worktrees you created manually with `git worktree add`
- Worktrees from a previous session (even if created by EnterWorktree then)
- The directory you're in if EnterWorktree was never called

If called outside an EnterWorktree session, the tool is a **no-op**: it reports that no worktree session is active and takes no action. Filesystem state is unchanged.

## When to Use

- The user explicitly asks to "exit the worktree", "leave the worktree", "go back", or otherwise end the worktree session
- Do NOT call this proactively — only when the user asks

## Parameters

- `action` (required): `"keep"` or `"remove"`
  - `"keep"` — leave the worktree directory and branch intact on disk. Use this if the user wants to come back to the work later, or if there are changes to preserve.
  - `"remove"` — delete the worktree directory and its branch. Use this for a clean exit when the work is done or abandoned.
- `discard_changes` (optional, default false): only meaningful with `action: "remove"`. If the worktree has uncommitted files or commits not on the original branch, the tool will REFUSE to remove it unless this is set to `true`. If the tool returns an error listing changes, confirm with the user before re-invoking with `discard_changes: true`.

## Behavior

- Restores the session's working directory to where it was before EnterWorktree
- Clears CWD-dependent caches (system prompt sections, memory files, plans directory) so the session state reflects the original directory
- If a tmux session was attached to the worktree: killed on `remove`, left running on `keep` (its name is returned so the user can reattach)
- Once exited, EnterWorktree can be called again to create a fresh worktree


## Input Schema

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "action": {
      "description": "\"keep\" leaves the worktree and branch on disk; \"remove\" deletes both.",
      "type": "string",
      "enum": [
        "keep",
        "remove"
      ]
    },
    "discard_changes": {
      "description": "Required true when action is \"remove\" and the worktree has uncommitted files or unmerged commits. The tool will refuse and list them otherwise.",
      "type": "boolean"
    }
  },
  "required": [
    "action"
  ],
  "additionalProperties": false
}
```

## Token Impact

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- Complete definition estimated tokens: **898**
- Measurement: captured tool object serialized independently as JSON text against the common baseline
- Additivity: independent, non-additive estimate
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