Unclear The finding does not say what is being uploaded or where it goes.
What
A git worktree is an extra working folder attached to the same git project. Claude Code refuses to upload from a linked worktree in some cases. When the reason is worktree_config, the refusal now also warns that a new worktree made from this one would be refused too, because current versions of git copy that configuration file into it.
Why
You will not waste time making a fresh worktree from the same one, expecting it to get around the refusal.
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The finding does not say what is being uploaded or where it goes.