# Claude Code Mode

> Source: <https://github.com/gabe4coding/claude-code-mode>
> Published: 2026-10-11 12:37:00+00:00

A Claude Code plugin: the model writes one JavaScript program that calls your MCP tools in a sandbox. Only the return value goes back into the context.

[Quick start](#quick-start) ·
  [Usage](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/usage.mdx) ·
  [Hints](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/hints.mdx) ·
  [Functions](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/functions.mdx) ·
  [Permissions](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/permissions.mdx) ·
  [Config](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/configuration.mdx)

## code-mode-explainer-github.mp4

Without code-mode, the model calls MCP tools one by one, and each full result goes into the context. With code-mode, the model writes one program. The program calls the tools, then filters and joins the results in a sandbox. Only the answer goes into the context.

- **Fewer tokens** : the intermediate data stays out of the context. The model uses the context for the task.
- **Sandbox** : the program runs in its own Node process, with no file system and a CPU limit. On macOS, and on
Linux where`unshare -rn` works, it also has no network.
- **Hints** : short notes for each MCP server tell the model about result formats, required arguments and limits.
The model can propose a new hint or the removal of a wrong hint, and you approve it.
- **Saved functions** : the model can propose a program part that works as a function for later sessions. You read
the code and approve it.
- **Your permission rules apply** : each MCP call in the program gets the normal permission check.

You need Claude Code and Node.js 22.13 or later.

Type these commands at the prompt of a Claude Code session:

```
/plugin marketplace add gabe4coding/claude-code-mode
/plugin install code-mode@claude-code-mode
```

Start a new session. Then ask for a task that needs several MCP calls.

If you use auto mode, add allow rules for your MCP tools first. Read [Permissions](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/permissions.mdx).

You ask: *"Which of my open Jira issues have no update in the last 14 days?"* The model writes one program, for
example:

``` js
const issues = await call("mcp__claude_ai_Jira__searchJiraIssuesUsingJql", {
  cloudId: "example.atlassian.net",
  jql: "assignee = currentUser() AND statusCategory != Done",
})
const cutoff = Date.now() - 14 * 24 * 3600 * 1000
return issues.issues
  .filter(i => Date.parse(i.fields.updated) < cutoff)
  .map(i => ({ key: i.key, title: i.fields.summary }))
```

The model gets only the short list, not each full issue.

| Page |  | 
|---|---|
| [Installation](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/installation.mdx) | Requirements, install, local folder, update | 
| [Usage](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/usage.mdx) | The three tools, how to write a program, the result | 
| [Hints](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/hints.mdx) | Write hints, approve proposals, the safety rules | 
| [Saved functions](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/functions.mdx) | Approve or write functions that programs use again | 
| [Permissions](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/permissions.mdx) | Manual and auto mode, allow rules | 
| [Configuration](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/configuration.mdx) | Every option and its default | 
| [How it works](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/how-it-works.mdx) | One run from start to end, the four sandbox layers | 
| [Troubleshooting](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/troubleshooting.mdx) | Common errors and known limits | 
| [Development](https://github.com/gabe4coding/claude-code-mode/blob/main/docs/development.mdx) | Layout, tests, releases | 

MIT. See [LICENSE](https://github.com/gabe4coding/claude-code-mode/blob/main/LICENSE).