feat: add MCP server module exposing search_regulations tool

- New backend/app/mcp/ module: MCPServer instance with a single
  search_regulations tool backed by the existing AgentConversationService.
- MCPAuthMiddleware reuses existing JWT auth (no new auth mechanism).
- Mounted at /mcp/ in api/main.py via Streamable HTTP transport; wired the
  MCP session manager into the existing lifespan() via AsyncExitStack
  (app.mount() does not propagate nested ASGI lifespans automatically).
- Fixed a doubled /mcp/mcp path by setting streamable_http_path to "/"
  (MCPServer.streamable_http_app() defaults to registering its own /mcp route).
- Verified end-to-end with the real mcp Python client: list_tools() returns
  search_regulations, auth correctly 401s without or with an invalid token.
- 7 new tests, 76 total (up from 69), all passing.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

This commit is contained in:

wangwei

2026-07-29 13:00:52 +08:00

co-authored by

Copilot

parent e78c8a989f

commit bd3dc38d1d

9 changed files with 302 additions and 20 deletions

									
										backend/tests/mcp/__init__.py
									
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				"""Test package for the MCP module (backend/app/mcp/)."""

				# Empty package marker — no shared fixtures needed yet for this small test suite.