Add websockets to the dev extra so the repro harness smoke test can import
its websocket client dependency in the CI test matrix. Also apply ruff
formatting to the files the formatter check was rejecting so the 3.12 lint
job passes.
- Route --json output cleanly: JSON goes to stdout (machine-readable),
human-readable summary goes to stderr. Without --json, the human
summary stays on stdout as before. Makes piping the harness into
jq / other tools trivial without losing operator visibility.
- Add distinct exit codes so CI and shell wrappers can branch on the
failure class: 0 success, 1 crash, 2 proxy_unreachable, 3 livez
threshold exceeded, 4 warmup failed, 130 SIGINT (already correct).
Smoke test updated to assert EXIT_PROXY_UNREACHABLE instead of 1.
- Replace flat 50-250ms jitter in the Anthropic-client retry loop with
exponential backoff + 50-150% jitter
(base=250ms, max=5000ms, attempt counter). Matches the proxy's own
jitter_delay_ms helper; inlined to keep the script free of proxy
package imports.
Some earlier tests in the suite replace sys.modules['websockets'] with
a stub. When the smoke test ran after those, uvicorn's
websockets-sansio backend tried to import websockets.server at connect
time, resolved through the stub, and failed with
'No module named websockets.server; websockets is not a package',
preventing the mock proxy from starting.
Add an autouse fixture that drops stub websockets.* entries from
sys.modules, re-imports the real package + websockets.asyncio.server,
and restores prior state on teardown. Keeps the smoke test
deterministic regardless of collection order.
uvicorn's auto-select imports websockets_impl.py which requires the
legacy API (websockets<14). With websockets 16.0 installed in the
local venv, auto-select errored before its fallback could trigger,
failing the smoke test with 'No module named websockets.legacy'.
Explicitly selecting the websockets-sansio backend (shipped with
uvicorn) works against websockets 16.0 and keeps the smoke test
representative of the real production WS path.
