FastAPI

This release fixes an issue with background tasks and headers in `app.frontend()`. Documentation for `FASTAPI_ENV` in the FastAPI CLI guide has also been updated.

Introduces a new `check_dir="auto"` option for `app.frontend` to simplify local development with `fastapi dev`. This enhancement aims to improve developer convenience.

This release includes a fix for `status_code` being ignored in SSE and JSONL streaming endpoints. It also contains documentation improvements for `format_sse_event` and the addition of an API reference page for `fastapi.sse`.

This release fixes an issue with line splitting in `format_sse_event` to ensure compliance with the Server-Sent Events (SSE) specification.

This release fixes a bug where `response_model_*` parameters were ignored for certain non-generator endpoints. The fix ensures correct behavior for endpoints returning `Iterable[...]`.

This release includes a fix for handling sequences with nested Annotated types. It also contains several internal improvements related to testing and regression checks.

This release includes a fix for `exclude_defaults` in `jsonable_encoder` and several internal dependency updates.

This release fixes a bug where the stream item type was lost when using `include_router()`. The fix is detailed in PR #15077.

This release includes refactoring to avoid flattening dependencies for OpenAPI and internal upgrades to latest-changes. It also adds benchmarks for OpenAPI dependency.

This release refactors how dependencies are handled for request parameters, particularly for OpenAPI. This change aims to improve the management of complex parameter structures.

This release includes a refactor to avoid flattening dependencies for body fields, as detailed in PR #16071.

This release includes a refactor to skip unused dependency repeat bookkeeping, improving efficiency. The change is detailed in PR #16069.

This release includes a refactor to avoid repeated dependency flattening in OpenAPI, improving performance. The change was implemented in PR #16067.

This release includes refactoring to stop retaining flat dependency trees and the addition of a new memory benchmark for internal use.

Updated the lru_cache limit for dependencies to better handle large applications. This refactor aims to improve performance and resource management in complex app scenarios.

This release focuses on documentation improvements, including adding new library skills documentation and restructuring existing pages. It also includes refactors to reduce memory usage in dependencies and internal updates to CI benchmarks and data generation scripts.

This release introduces a thread-safe refactor for router route building, improving stability for parallel test execution. The change is mainly relevant for less common testing scenarios.

This release includes a fix for frontend fallback support with doted paths and numerous internal updates and dependency bumps. It also features extensive translation updates across multiple languages.

This release introduces the ability to pass dependencies to app.frontend() for enhanced frontend integration, alongside numerous internationalization updates and internal maintenance.

This release refactors the `app.frontend()` function to return a 404 for unsupported HTTP methods when no static files match. It also includes internal updates to sponsor data handling.

This release focuses primarily on internal maintenance, including dependency updates and refactoring library skill information accessibility for agents.

This release introduces the ability to serve frontend assets directly via `app.frontend()` and `router.frontend()`. It also includes numerous documentation improvements and internal maintenance updates.

This release introduces the new iter_route_contexts() method for advanced routing introspection and includes numerous dependency updates and translation fixes.

This release focuses on bug fixes, specifically addressing typing checks for APIRoute and allowing empty paths in prefixless routers.

This release refactors the internal handling of `APIRouter` inclusion to preserve route instances instead of cloning them, enabling new features like adding routes after inclusion. This change modifies the structure of `router.routes`, which is a breaking change for code relying on its previous list structure.