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sl-mcp

by donovan-jasper
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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+

Related MCP server: mcp-cli-catalog

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

This server cannot be deployed

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