: keep-alive

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000000,"model":"deepseek-v4-flash","system_fingerprint":"fp_fixture_001","choices":[{"index":0,"delta":{"role":"assistant","reasoning_content":"Check the fixture. "},"finish_reason":null,"logprobs":null}],"usage":null}

: keep-alive

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000000,"model":"deepseek-v4-flash","system_fingerprint":"fp_fixture_001","choices":[{"index":0,"delta":{"content":"Mock stream OK."},"finish_reason":null,"logprobs":null}],"usage":null}

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000000,"model":"deepseek-v4-flash","system_fingerprint":"fp_fixture_001","choices":[{"index":0,"delta":{},"finish_reason":"stop","logprobs":null}],"usage":null}

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000000,"model":"deepseek-v4-flash","system_fingerprint":"fp_fixture_001","choices":[],"usage":{"prompt_tokens":12,"completion_tokens":6,"total_tokens":18,"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":12,"completion_tokens_details":{"reasoning_tokens":0}}}

data: [DONE]

