* Move OpenAPI to providers/openapi/ submodule
Migrates the OpenAPI implementation to the provider pattern:
- Creates src/fastmcp/server/providers/openapi/ submodule with provider.py,
components.py, and routing.py
- Converts server/openapi/ to deprecated re-export stubs
- FastMCPOpenAPI remains as deprecated wrapper that uses OpenAPIProvider
- Updates experimental/server/openapi to import from new canonical location
* Update tests and FastMCP methods to use OpenAPIProvider
- Update FastMCP.from_openapi() and from_fastapi() to use OpenAPIProvider
directly, returning FastMCP instead of deprecated FastMCPOpenAPI
- Move tests from tests/server/openapi/ to tests/server/providers/openapi/
- Update all test imports to use new canonical location
- Add tests/deprecated/openapi/ for backward compatibility testing
- Update tests/client/test_openapi.py to use new imports
* Fix deprecation warning tests and address CodeRabbit feedback
- Use importlib.reload() to ensure deprecation warnings fire in tests
- Change logger.error to logger.exception for better stack traces
* Replace type: ignore[attr-defined] with isinstance assertions in tests
* Fix isinstance assertions in failing tests
- Fix enum test to check for ResponseEnum instead of str
- Fix binary resource test to check for BlobResourceContents instead of TextResourceContents
- Fix Root type tests to check attributes directly instead of isinstance checks
* Fix type errors without using type: ignore
- Remove execution methods from TransformingProvider (only handles transformations)
- Add execution methods to base Provider class with default implementations
- Fix type narrowing in tests using cast() instead of type: ignore
- Fix PromptResult type handling in prompt render tests
- Fix type narrowing in middleware test for arguments and structured_content
* Add test_custom_subclass_tasks.py
* Refactor provider execution: delegate to middleware via wrapper components
- Remove execution methods (call_tool, read_resource, etc.) from Provider base
- Add FastMCPProvider* wrapper classes that delegate to child server middleware
- Move task routing to Tool._run() using contextvars (_task_metadata, _tool_call_key)
- Add convert_to_tool_result(result, output_schema) utility for Docket results
- Add convert_to_prompt_result() utility for prompt task results
- Pass namespaced key via add_to_docket(name=) for mounted tool lookup
* Standardize add_to_docket() with fn_key/task_key parameters
All components now use explicit fn_key (function lookup) and task_key
(result storage) parameters instead of relying on implicit key handling.
This fixes mounted component task execution where the MCP-visible key
differs from the Docket-registered function name.
* Add middleware chain tests for three-level mount hierarchy
Tests verify middleware runs at parent, child, and grandchild levels
for tools, resources, prompts, and resource templates.
* WIP: Provider refactor - unified submit_to_docket, template _read() in progress
Work in progress on refactoring execution to use component _read()/_run()/_render() methods.
Template background tasks not yet working - needs fix for Docket key lookup.
* Fix conversion functions to take full component for attribute access
Pass Tool/Prompt/Resource/Template to conversion functions instead of
individual attributes, ensuring access to serializer, output_schema,
mime_type, etc. Also fixes mixed-content output schema validation.
* Refactor: unified convert_result() methods and check_background_task helper
- Add convert_result() instance methods to all component types (Tool, Prompt, Resource, ResourceTemplate)
- Extract duplicated task routing logic into check_background_task() helper
- Fix type annotations on FastMCPProviderResource.read() and FastMCPProviderPrompt.render()
- Update protocol.py to use component.convert_result() uniformly
* Update tests to use namespace= instead of deprecated prefix= parameter
* Refactor MountedProvider into FastMCPProvider + TransformingProvider
Split the monolithic MountedProvider into two focused components:
- FastMCPProvider: wraps a FastMCP server as a provider
- TransformingProvider: applies namespace/rename transformations to any provider
Add with_transforms() method to Provider base class for fluent API.
Rename mount() prefix parameter to namespace (deprecate prefix).
* Reuse compiled URI_PATTERN in deprecated import_server
