[PR] kernel: keep signed thinking with its tool_use across folds (#4885) - #4898

[PR] kernel: keep signed thinking with its tool_use across folds (#4885)#4898

ranxianglei wants to merge 15 commits into

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2026-10-27_4885-signed-thinking-fold-splitranxianglei/billion-context:2026-10-27_4885-signed-thinking-fold-splitCopy head branch name to clipboard