- D-11: replace get_client_ip body with trusted-proxy CIDR check (127/8, 172.16/12,
192.168/16, ::1/128); untrusted peers always return their own IP, preventing XFF
spoofing by external callers
- D-12: create services/rate_limiting.py with _account_key() keyed by user.id
(falls back to peer IP when no authenticated user in request.state); exports
account_limiter = Limiter(key_func=_account_key)
- Wire: auth.py switches from get_remote_address to get_client_ip; main.py imports
account_limiter; all 9 documents.py endpoints and 7 cloud.py endpoints decorated
@account_limiter.limit("100/minute") with request.state.current_user = current_user
as the first handler statement (A1 ordering invariant)
- Promote all 8 xfail stubs to real assertions; add autouse fixture in conftest.py
to reset MemoryStorage between tests preventing cross-test 429 contamination
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
