sl-mcp

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