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fix(agent): 最小改动产 patch — 注入目标文件完整原文,消除整文件重写噪声 #27

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xiaohei merged 1 commits from fix/minimal-diff-execution into main 2026-06-22 09:49:04 +00:00
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xiaoheiandClaude Opus 4.8 435f720cfb fix(agent): 注入目标文件完整原文 + 强令最小改动(修整文件重写噪声)
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根因:agent 无本地读文件工具,只拿到 workspace 的截断采样,被要求"输出完整文件"
时只能凭残缺采样+自身知识重构整个文件 → 丢行/重排/改注释/版权头 → 巨噪声 diff,
要么 apply 不上,要么 apply 了破坏无关测试(SWE-bench Pro 两臂 0/10 的主因)。

修法:
- _load_exact_target_files():从子任务描述正则提取目标文件路径,注入其**完整未截断**
  的磁盘原文(上限6文件/各120KB,超限留给采样)。
- 执行 prompt 新增 "EXACT CURRENT CONTENT" 段 + 强令:返回内容必须是该原文逐字节保留、
  仅施加任务所需最小编辑,禁止 reformat/reorder/rename/clean-up 无关行。
- 强化原 full-file 输出说明。

目的:让 diff 只含必要行,救回 NodeBB 296/300、ansible 171/175 这类"差几个测试"的近失题。
契约测试全绿(runtime-contract/merge-smoke/workflow-e2e/contract-freeze)。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
 2026-06-22 09:47:35 +00:00