Ensure custom OpenAI-compatible provider tests explicitly request non-stream responses for both direct connectivity checks and the proxy pipeline. This avoids default SSE responses being parsed as empty JSON by provider validation.
Tested: bun test src/server/__tests__/providers.test.ts --test-name-pattern "requests non-stream OpenAI Chat responses during provider tests"
Tested: bun test src/server/__tests__/providers.test.ts
Tested: bun test src/server/__tests__/proxy-transform.test.ts
Tested: bun run check:server
Confidence: high
Scope-risk: narrow