sl-mcp

MCP server for Sapling (sl). Gives LLMs structured access to Sapling repos with built-in safety guardrails.

Prerequisites

• Sapling installed and on your PATH
• Node.js 18+

Install

Claude Code

claude mcp add --transport stdio sl -- npx -y sl-mcp

Restart Claude Code. Verify with /mcp — you should see the sl server listed.

Other MCP clients

Add to your MCP config file (.mcp.json, claude_desktop_config.json, etc.):

{
  "mcpServers": {
    "sl": {
      "command": "npx",
      "args": ["-y", "sl-mcp"]
    }
  }
}

Tools

22 tools across three tiers:

| Tier | Tools | Confirmation | |------|-------|-------------| | Read | sl_status sl_diff sl_log sl_show sl_blame sl_cat sl_root sl_smartlog | None | | Write | sl_goto sl_commit sl_amend sl_rebase sl_shelve sl_unshelve sl_add sl_remove sl_forget sl_revert sl_undo | Destructive ops warn LLM to confirm | | Remote | sl_pull sl_push sl_pr_submit | Always confirm with user |

Safety

• Force push to main/master is blocked server-side (not just a warning)
• Destructive tools (rebase, revert, goto --clean) include confirmation guidance in tool descriptions
• Remote tools always instruct the LLM to confirm before executing

Configuration

| Env var | Default | Description | |---------|---------|-------------| | SL_MCP_BINARY | sl | Path to Sapling binary | | SL_MCP_TIMEOUT | 30000 | Command timeout in ms |

License

MIT