fastapilisted
Install: claude install-skill martineserios/thebrana
# FastAPI
Official FastAPI skill to write code with best practices, keeping up to date with new versions and features.
## Use the `fastapi` CLI
Run the development server on localhost with reload:
```bash
fastapi dev
```
Run the production server:
```bash
fastapi run
```
### Add an entrypoint in `pyproject.toml`
FastAPI CLI will read the entrypoint in `pyproject.toml` to know where the FastAPI app is declared.
```toml
[tool.fastapi]
entrypoint = "my_app.main:app"
```
### Use `fastapi` with a path
When adding the entrypoint to `pyproject.toml` is not possible, or the user explicitly asks not to, or it's running an independent small app, you can pass the app file path to the `fastapi` command:
```bash
fastapi dev my_app/main.py
```
Prefer to set the entrypoint in `pyproject.toml` when possible.
## Use `Annotated`
Always prefer the `Annotated` style for parameter and dependency declarations.
It keeps the function signatures working in other contexts, respects the types, allows reusability.
### In Parameter Declarations
Use `Annotated` for parameter declarations, including `Path`, `Query`, `Header`, etc.:
```python
from typing import Annotated
from fastapi import FastAPI, Path, Query
app = FastAPI()
@app.get("/items/{item_id}")
async def read_item(
item_id: Annotated[int, Path(ge=1, description="The item ID")],
q: Annotated[str | None, Query(max_length=50)] = None,
):
return {"message": "Hello World"}
```
instead of:
```python
# DO NOT DO THI