76 lines
2.9 KiB
Markdown
76 lines
2.9 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## What This Is
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Arcade MCP is a Python tool-calling platform for building MCP (Model Context Protocol) servers. It's a monorepo containing 5 interdependent libraries and a CLI.
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## Commands
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| Task | Command |
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|------|---------|
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| Install all packages | `make install` (runs `uv sync --extra all --extra dev`) |
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| Run all lib tests | `make test` |
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| Run a single test | `uv run pytest libs/tests/core/test_toolkit.py::TestClass::test_method` |
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| Lint + type check | `make check` (pre-commit + mypy) |
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| Build all wheels | `make build` |
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Package manager is **uv** — always use `uv run` to execute Python commands, never bare `pip` or `python`. Python 3.10+. Build system is Hatchling.
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## Library Dependency Graph
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```
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arcade-core (base: config, errors, catalog, telemetry)
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├── arcade-tdk (tool decorators, auth providers, annotations)
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├── arcade-serve (FastAPI worker infrastructure, MCP server)
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│ └── arcade-mcp-server (MCPApp class, FastAPI-like interface)
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│ └── arcade-mcp CLI (depends on all above)
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└── arcade-evals (evaluation framework, critics, test suites)
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```
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## Versioning Rules
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- Use semver. ALWAYS bump the version in `pyproject.toml` when modifying a library's code.
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- ALWAYS bump the minimum required dependency version when making breaking changes between libraries.
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## Key Patterns
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### MCP Server (arcade-mcp-server)
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```python
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from typing import Annotated
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from arcade_mcp_server import MCPApp
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app = MCPApp(name="my_server", version="1.0.0")
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@app.tool
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def greet(name: Annotated[str, "The name of the person to greet"]) -> str:
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"""Greet a person."""
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return f"Hello, {name}!"
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if __name__ == "__main__":
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transport = sys.argv[1] if len(sys.argv) > 1 else "stdio"
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app.run(transport=transport, host="127.0.0.1", port=8000)
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```
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Transports: `stdio` (default) and `http` (tools that require auth or secrets need resource server auth provided by arcade-mcp-server)
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## Project Layout
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- `libs/arcade-*/` — Core libraries. Most have their own `pyproject.toml`. libs/arcade-cli and arcade-evals use the top-level `pyproject.toml`.
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- `libs/tests/` — All library tests, grouped by component (core, cli, arcade_mcp_server, tool, sdk, worker)
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- `examples/mcp_servers/` — Example MCP server implementations
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## Development Rules
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- **All changes must have tests and follow TDD.** Every new feature, bug fix, or behavioral change needs a corresponding test in `libs/tests/`.
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- **Always use uv.** Never use `pip`, `pip install`, `python`, or `python -m` directly. Use `uv run`, `uv sync`, `uv build`, etc.
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## Code Quality
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- **ruff** for linting/formatting
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- **mypy** with strict settings (`disallow_untyped_defs`, `disallow_any_unimported`)
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- **pre-commit** hooks run automatically
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- CI tests on Python 3.10, 3.11, 3.12 across Ubuntu/Windows/macOS
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