A file_read of a path that is inside the workspace but does not exist is now
BLOCKED with "no such path" instead of silently returning empty — so an agent
that hallucinated a filename fails loud and self-corrects (list the directory,
fix the name) rather than proceeding on an absent reference. Out-of-workspace
targets stay PathContainmentRule's concern, so the gates don't double-handle.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
kami
146f96a6fd