Isolation fence skips Bash writes

“In the same session, at the same moment, Edit to that directory is denied while a Bash write to the same directory succeeds.”

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I hit this bug: rapsheet.dev/sheets/claude-code/issues/17171/file
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Worktree isolation blocks Edit/Write but allows Bash writes. In a worktree session, a Bash write to the shared checkout succeeds while Edit or Write to the same path is refused.

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Where: worktree isolation
Error text: This session is isolated in the worktree `<base>\.claude\worktrees\isolation-probe`. Edit the worktree copy of this file instead of the shared-checkout path.
Versions: 2.1.273 to 2.1.299
Platforms: Windows
How bad: Loses work: code or files lost or damaged.

Part of: Worktree guard refuses commands and edits9 bugs

Worktree Bash refusals12 people
Worktree guard blocks nested repos4 people
Subagent Bash refused after worktree2 people
Heredoc refused in worktree3 people
Empty .git treated as repo root2 people
Worktree guard refuses ~ git paths2 people
Worktree guard refuses rewritten git3 people
Worktree refuses shell-word args3 people

Original reports2, newest first

Oct 16, 2026[CLI] Worktree isolation fence covers Write/Edit but not Bash writes to the parent checkout#102741
Sep 20, 2026Worktree isolation denies Edit under the base repo's .claude/ — including a separate registered worktree — while Bash writes to the same directory are allowed#95776