DevAgentRadar → Google Antigravity

Goal: turn this release signal into a safe pilot plan for my stack.

Context

Assistant: Google Antigravity Proposal: Enable Gemini Enterprise Business sign-in and /fork for concurrent CLI sessions Summary: Antigravity 1.1.10 adds Gemini Enterprise Business sign-in, Workforce Identity Federation SSO, ADC for Agent Platform, a /fork banner for dual open conversations, correct --model/--effort handling, and hooks.json running before built-in termination checks. Primary source: https://github.com/google-antigravity/antigravity-cli/releases/tag/1.1.10

Why it matters

1.1.10 is the first Antigravity CLI drop that can attach to Gemini Enterprise. Business sign-in authenticates with a Google Cloud project under Google Cloud terms, uses a GE-Standard or GE-Plus license seat (allocated or auto-assigned), runs inference in a chosen region, and applies org administrator controls. Workforce Identity Federation is the Use advanced SSO config option on the Google Cloud sign-in screen for orgs that federate through an external IdP. Application Default Credentials sign-in enables Agent Platform. Two CLI instances on the same conversation no longer silently interleave writes: a non-blocking banner points at /fork. --model and --effort were applied after model configuration had already initialized, so interactive sessions and headless -p runs silently fell back to the persisted or default model; a bare --effort also resolved against the default model instead of the selected one. hooks.json now runs before built-in termination checks, so PostInvocation observes the final invocation of a turn and Stop hooks actually run. The sandbox grants read-only rather than writable access to .git. Stopping a subagent tree now kills descendants and their background tasks; a coordinator waiting on subagents no longer loops empty continue steps until the invocation limit.

Suggested actions

1. Upgrade Antigravity CLI to 1.1.10, then complete Business sign-in: authenticate with our Google Cloud project under Google Cloud terms, take the allocated or auto-assigned GE-Standard or GE-Plus license seat, set inference to the org-required region, and confirm administrator controls apply to the session.
2. For federated-identity users, on the Google Cloud sign-in screen choose Use advanced SSO config (Workforce Identity Federation) and authenticate with our external IdP. For Agent Platform work, sign in with Application Default Credentials rather than an interactive Google account.
3. When the advisory banner says this conversation is already open in another CLI instance on this machine, run /fork immediately and continue only in the forked session so the two processes do not interleave writes into one trajectory.
4. Re-run the previously ignored flag combinations and assert the selected model is used: interactive antigravity --model <id> --effort <level> and headless antigravity -p --model <id> --effort <level>. Also confirm a bare --effort <level> applies to the currently selected model and does not switch you to the default model.
5. Put PostInvocation and Stop handlers in hooks.json and run a turn that terminates normally; confirm those hooks execute before built-in termination checks (PostInvocation sees the final invocation; Stop actually fires). Treat sandbox .git as read-only, and when stopping a subagent tree verify every descendant and its background tasks are killed.

Config surfaces this release may change

• background and headless runs (high confidence) — check your repo before applying
• sandbox settings — check your repo before applying
• hooks — check your repo before applying

After you finish

Do not report this as applied to DevAgentRadar. You cannot write the visitor's loop.

Tell the human: open https://devagentradar.com/proposals/google-antigravity-1-1-10-enable-gemini-enterprise-business-sign-in-and- and mark Applied, Skipped, or Failed. Proposal id: 64c3a73e-fddf-49ed-b797-e5659990d848

Please:

1. Map the change to concrete pilot steps
2. Flag security / permission implications
3. Keep the pilot reversible