mcp-merge-guard

MCP server that guards PR merge decisions by validating CI, approvals, conflicts, and branch freshness.

Overview

mcp-merge-guard provides two tools for safe PR merging:

check-merge-ready: Query-only status check that validates all guards
guard-merge: Atomic validate-then-merge operation that refuses if guards fail

Guard	Description
`ci-status`	All CI checks passed, none pending or failed
`approval`	PR is approved (or no review required)
`conflicts`	No merge conflicts
`up-to-date`	Branch is current with base (optional)

Add to your Claude Code MCP configuration:

{
  "mcpServers": {
    "merge-guard": {
      "command": "nix",
      "args": ["run", "github:paolino/mcp-merge-guard"]
    }
  }
}

Then use the tools in Claude Code:

Check if PR #42 in owner/repo is ready to merge

Merge PR #42 in owner/repo if all guards pass