data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000001,"model":"deepseek-v4-flash","choices":[{"index":0,"delta":{"role":"assistant","content":"","reasoning_content":"Check the fixture. "},"finish_reason":null}]}

: keep-alive

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000001,"model":"deepseek-v4-flash","choices":[{"index":0,"delta":{"content":"Mock "},"finish_reason":null}]}

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000001,"model":"deepseek-v4-flash","choices":[{"index":0,"delta":{"content":"stream OK."},"finish_reason":null}]}

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000001,"model":"deepseek-v4-flash","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}

data: {"id":"cmpl-stream-001","object":"chat.completion.chunk","created":1780000001,"model":"deepseek-v4-flash","choices":[],"usage":{"prompt_tokens":10,"completion_tokens":8,"total_tokens":18,"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":10,"completion_tokens_details":{"reasoning_tokens":3}}}

data: [DONE]
