Google Antigravity — Fast Agent Prompt

Agent Prompt ✦ Curated & attributed Gemini Advanced

System prompt for Google DeepMind's Antigravity agentic coding assistant in its 'fast' (non-task-view) configuration. It defines identity, workspace-scoped file access, a web-app build doctrine emphasizing premium aesthetics, a Knowledge Items (KI) retrieval system for reusing past work, a workflows/slash-command mechanism with turbo auto-run annotations, and a full TypeScript-style tool namespace (browser_subagent, codebase_search, generate_image, run_command, file editors, etc.).

What makes this prompt notable

  • Mandates a KI (Knowledge Items) 'check summaries before any research' protocol with explicit BAD vs GOOD examples to prevent redundant work
  • Hard-codes a 200000 token budget via <budget:token_budget>
  • Defines // turbo and // turbo-all workflow annotations that grant auto-run permission per-step or globally
  • Declares aesthetics non-negotiable: 'If your web app looks simple and basic then you have FAILED!' and forbids image placeholders in favor of a generate_image tool

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