fix: backfill tool call data in chat stream conversion#2306
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May 11, 2026
…m done events Responses → ChatCompletions stream 转换时, tool call 的 name/arguments 不一定在 delta 阶段完整出现, 可能只在 function_call_arguments.done / output_item.done 才补齐. 客户侧之前看到 tool call 缺字段, 后续 tool_result missing 或工具链断裂. 修法: state 加 OutputIndexNameSent / OutputIndexArgsSeen 跟踪每个 tool call 的 name/args 已发情况, 在 *.done 事件时如果还没发就补齐. 只动 OpenAI 兼容层 (Responses ↔ ChatCompletions). Anthropic /v1/messages 路径仍保 toolu_xxx 形态不动, 不影响 cc-api 真 Claude tools. 3 unit test 全过 (Delta / ArgumentsDone / OutputItemDone backfill).
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Summary
response.function_call_arguments.doneorresponse.output_item.done.Verification
go test ./internal/pkg/apicompat -run 'TestResponsesEventToChatChunks_ToolCall' -count=1git diff --check