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Ganglia

Quick Start

1. Install and index

Section titled “1. Install and index”
Terminal window
cargo install gl
cd your-project && gl init .

2. Add to Claude Code

Section titled “2. Add to Claude Code”
Terminal window
# In your project directory
cat > .mcp.json << 'EOF'
{
  "mcpServers": {
    "ganglia": {
      "command": "gl",
      "args": ["mcp", "-p", "."]
    }
  }
}
EOF

3. Ask your first question

Section titled “3. Ask your first question”

Open Claude Code and try:

What would break if I changed UserService?

Ganglia calls code_impact and returns a severity-ranked list of every affected function — before you write a single line.

4. Mark a danger zone

Section titled “4. Mark a danger zone”
Mark processPayment as a danger zone

From now on, if the AI tries to touch processPayment, zone_guard intercepts and asks you first.

Next steps

Section titled “Next steps”