base: b16728af846ab00903867737f80bbd4d75cf973d
candidate: 8a0032eb53439f6f5421267ad512e2ee05d96fdd
Linux x86_64. Real pinned Google Antigravity ACP 1.3.0.
Archive SHA-256: 9fb60956af0a9d76220a4db91ca9ac88e2a2372ad68f985ab5fceace6b825b96
Identical shell wrapper sleeps 6 seconds then execs the actual installed Node with original argv.
Both runs call prepareAntigravityProfile, buildAntigravityAcpSpawnInput and makeAntigravityAcpRuntime with temporary profiles.

BEFORE
real Node helper delayed 6 seconds; pinned Google Antigravity 1.3.0
AcpTransportError: ACP transport operation failed: Antigravity browser suppression verification timed out.
exit: 1

AFTER
real Node helper delayed 6 seconds; pinned Google Antigravity 1.3.0
profile preflight succeeded; private profile created
ACP initialize: {"name":"antigravity-acp","title":"Google Antigravity","version":"1.3.0"}
loadSession: true
exit: 0

Unverified: authenticated session open through a client, natural cold-start conditions, Windows and macOS.