Agents working on a task that depends on other tasks (e.g. documentation
alignment tasks needing the sibling tasks' specs) were repeatedly
rejected by the worktree boundary when reading .fusion/tasks/FN-NNNN/PROMPT.md,
which also contributed to the malformed-tool-result crash we just fixed.
Add a read-only exception to isWorktreeAllowedPath: the read/glob/grep
tools may access .fusion/tasks/*/PROMPT.md and .fusion/tasks/*/task.json
at the project root. Writes and bash cwd remain restricted.
Update the system-prompt boundary docs (executor.ts) so agents know the
exception exists and stop burning turns re-trying rejected reads.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
b7b10a6284