Antigravity 2.12 Adds /boost, a Three-Phase Multi-Agent Pipeline for Hard Bugs

Google shipped Antigravity 2.12.0 on September 2 with several updates, but the one getting the most attention is /boost — a new slash command that hands difficult engineering problems to a multi-agent reasoning pipeline rather than processing them as single-turn requests.

What /boost does

Standard Antigravity responses handle most tasks fine. But for problems where the usual approach falls short — concurrency bugs, large refactors, subtle regressions across multiple files — /boost routes the request through a three-phase system:

Strategy formation. A primary orchestrator analyzes the prompt and workspace context, breaking the problem into discrete, verifiable subtasks.
Parallel execution. Specialized subagents work isolated scopes simultaneously: implementation, investigation, and local verification. They run builds and tests before reporting findings.
Synthesis. The system aggregates results, runs regression checks, and feeds failures back for correction before surfacing a verified answer.

The docs call out four scenarios where this is most useful: concurrency and deadlock bugs, high-performance data structure implementations, legacy interface refactors across multiple files, and root-cause tracing through unfamiliar codebases.

One note on security: subagents inherit workspace permissions and require interactive approval for protected commands outside trusted scopes. So if your project has restricted commands, you’ll see prompts during a boosted session.

Availability

/boost is available on paid plans only, across Antigravity 2.0 and the Antigravity CLI. It’s not in the free tier.

Other 2.12.0 changes

The release also added response quoting: you can highlight any portion of an assistant response and quote it as context for a follow-up. Settings now shows which projects override a given setting and gives you a direct link to navigate there.

Split terminal layouts are preserved across window reloads. The side question panel got back and forward navigation for stepping through questions within a session. Nine bug fixes covered audio file attachments, auth errors on slow connections, extension restart failures, and keyboard focus ring styling, among others.

2.12.2 and enterprise Gemini access

Two days after 2.12.0, version 2.12.2 arrived with one focused addition: enterprise users can now select Gemini 3.8 Flash via Application Default Credentials (ADC) for agentic tasks. This lets enterprise teams route Antigravity through their existing Google Cloud identity infrastructure rather than managing separate API credentials.

Sources: Antigravity Changelog, Antigravity /boost docs