Enforce staff sandbox boundary via PreToolUse hook#8
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Staff mode previously relied only on CLAUDE.md prose to keep writes inside sandbox/; the harness still permitted Write, Edit, and Bash anywhere, so the boundary was advisory. An earlier commit had removed the mechanical PreToolUse gate in favor of instructions. Reintroduce mechanical enforcement, but path-aware so staff can still write reports to sandbox/. The sandbox-write-guard hook is a no-op in developer mode; in staff mode it allows Write/Edit/NotebookEdit only inside sandbox/ (resolving traversal and symlinks) and blocks Bash and Agent outright. Document the enforcement in CLAUDE.md and README so the sandbox boundary is no longer described as instruction-only. Issue #7 {Support safe writing}
liam-lloyd
approved these changes
Jun 17, 2026
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This PR adds support for writing files to a gitignored
sandboxfile.This directory is ignored by git so it's safe to write to.
Resolves #7