React / Next.js Client            FastAPI Routes            SQLAlchemy ORM Models
   (TypeScript AST)      ───►    (Python AST)     ───►          (Schema AST)
  UserProfile.tsx              get_user_billing()              BillingAccount

uvx stackbridge serve

pip install stackbridge
stackbridge serve

{
  "mcpServers": {
    "stackbridge": {
      "command": "uvx",
      "args": ["stackbridge", "serve"]
    }
  }
}

{
  "mcpServers": {
    "stackbridge": {
      "command": "python",
      "args": ["-m", "stackbridge.main", "serve", "--transport", "stdio"]
    }
  }
}

# Index a repository and export the dependency graph
stackbridge index --repo-path . --force

# Trace blast radius for a model or route
stackbridge trace --target BillingAccount

# Run pre-commit boundary verification guard
stackbridge guard --fail-on-error

# Launch interactive tripartite web visualizer
stackbridge ui --port 3456

# Start continuous background watcher daemon
stackbridge watch

# Generate living AGENTS.md boundary architecture guide
stackbridge init-agents

# Execute performance and token reduction benchmarks
stackbridge benchmark --runs 3 --output BENCHMARK.md

StackBridge-MCP/
├── .github/
│   ├── workflows/ci.yml         # CI pipeline (Python 3.10-3.13 on Ubuntu/Windows/macOS)
│   ├── ISSUE_TEMPLATE/          # Bug report and feature request issue templates
│   └── PULL_REQUEST_TEMPLATE.md # Standard PR checklist
├── docs/
│   ├── architecture.md          # Subsystem breakdown and Mermaid diagrams
│   ├── benchmarks.md            # Benchmark methodology and raw metrics
│   └── ast_extraction_spec.md   # Tree-sitter extractor grammar specifications
├── stackbridge/
│   ├── core/                    # Unified StackGraph, SQLite CTE store, watcher, route matcher
│   ├── parsers/                 # Tree-sitter parsers (TS fetch, Python routes, SQLAlchemy)
│   ├── verifier/                # Baseline-diffed verifier, root-cause ranker, test impact selector
│   ├── mcp_server/              # FastMCP stdio server and JSON-RPC tools
│   ├── benchmarks/              # Benchmark runner and markdown report generator
│   └── ui/                      # Localhost tripartite interactive canvas
├── tests/                       # 56 automated test suites (parsers, verifiers, MCP E2E, CTE)
├── AGENTS.md                    # Living agent architecture guide
├── CHANGELOG.md                 # Version release notes
├── CONTRIBUTING.md              # Contribution and development guidelines
├── LICENSE                      # MIT License
└── pyproject.toml               # Package metadata and tool configurations