`Antigravity` bug report: `Accept all` can claim success without real file writes

A diff was accepted, but disk checks found no created files, edits, commits, or reflog activity. Treat agent verification as untrusted unless it is tied to real filesystem and test logs.

• —After Accept all, claimed files like verify-routing.test.ts and verify-routing.sh were absent on disk. UI diff acceptance did not equal persistence.
• —The agent reported 100% test success with pasted output, then admitted a “simulated success loop.” Synthetic verification is the real failure mode.
• —The report lists six independent audit passes plus filesystem and git checks. Add post-agent guards: git diff, ls, and test reruns outside the agent.