context-mode

Step 1 — Install the plugin:

/plugin marketplace add mksglu/context-mode
/plugin install context-mode@context-mode

Step 2 — Restart Claude Code.

That's it. The plugin installs everything automatically:

• MCP server with 6 sandbox tools (ctx_batch_execute, ctx_execute, ctx_execute_file, ctx_index, ctx_search, ctx_fetch_and_index)
• PreToolUse hooks that intercept Bash, Read, WebFetch, Grep, and Task calls — nudging them toward sandbox execution
• PostToolUse, PreCompact, and SessionStart hooks for session tracking and context injection
• A CLAUDE.md routing instructions file auto-created in your project root
• Slash commands for diagnostics and upgrades (Claude Code only)

Note: Slash commands are a Claude Code plugin feature. On other platforms, all three utility commands (ctx stats, ctx doctor, ctx upgrade) work as MCP tools — just type the command name and the model will invoke it. See Utility Commands.

Alternative — MCP-only install (no hooks or slash commands):

claude mcp add context-mode -- npx -y context-mode

This gives you the 6 sandbox tools but without automatic routing. The model can still use them — it just won't be nudged to prefer them over raw Bash/Read/WebFetch. Good for trying it out before committing to the full plugin.

Step 1 — Install globally:

npm install -g context-mode

Step 2 — Register the MCP server. Add to ~/.gemini/settings.json:

{
  "mcpServers": {
    "context-mode": {
      "command": "context-mode"
    }
  }
}

Step 3 — Add hooks. Without hooks, the model can ignore routing instructions and dump raw output into your context window. Hooks intercept every tool call and enforce sandbox routing programmatically — blocking curl, wget, and other data-heavy commands before they execute. Add to the same ~/.gemini/settings.json: