Previous wiremock conversion fixed the listener-lifecycle race but
left the underlying problem unsolved: `ensure_env()` mutates the
process-global ANTHROPIC_ENDPOINT, and parallel `cargo test` threads
race on that write. Manifested as 502 / "error sending request for
url …" on the first concurrent test pair under both macOS and Linux.
Annotate every #[tokio::test] in openai_loop_wiring.rs +
openai_compat.rs with `#[serial_test::serial]` — these are the only
tests that touch ANTHROPIC_ENDPOINT via shared_mock_anthropic.
serial_test enforces process-wide ordering so the env mutation +
HTTP request pair is atomic per test. All other tests stay parallel.
Stress: 5 parallel `cargo test` runs all green.
Previous `tests/common/mod.rs` spawned a mock Anthropic upstream via
hand-rolled axum + std:🧵:spawn + own current-thread tokio runtime
bound to 127.0.0.1:0. Stable on Linux runner; flaked on macOS GitHub
Actions runners:
thread 'streaming_responses_runs_real_loop_not_stub' panicked at
kei-cortex/tests/openai_loop_wiring.rs:277:5:
no responses delta event in stream: event: response.error
data: {"error":"model: anthropic request: error sending request
for url (http://127.0.0.1:49312/v1/messages)"}
Root cause traced to macOS-runner loopback / fd-limit pressure on the
dedicated-thread current-thread runtime. wiremock crate runs a
production-quality hyper-based mock server, manages its own listener
lifecycle, and survives the macOS runner constraints.
## Change
- `Cargo.toml`: add wiremock = workspace dev-dep (already 0.6 in workspace)
- `tests/common/mod.rs::MockAnthropicServer` rebuilt over wiremock::MockServer
- `build_mock(text)` mounts `POST /v1/messages → 200 + canned body` on a
wiremock instance
- `mock_anthropic_responding_with()` spins one per call on a parked
helper thread (preserves `MockAnthropicServer: 'static` lifetime for
`shared_mock_anthropic` `OnceLock` singleton)
- `shared_mock_anthropic()` API unchanged; existing test sites in
`tests/openai_loop_wiring.rs` + `tests/openai_compat.rs` continue to
work without modification
## Verification
`cargo test -p kei-cortex --test openai_loop_wiring`: 7/7 pass locally
`cargo test -p kei-cortex`: full suite green (428 lib + integration)
Also includes DNA-INDEX regenerate (auto-encyclopedia hook artefact;
0 vortex matches preserved).
