Get the Antigravity 2.0 Operator Playbook

Google killed Gemini CLI at I/O 2026 and replaced it with Antigravity 2.0 — a full agentic development suite built to come after Cursor, Claude Code, and Windsurf. This is the operator playbook: every pillar unpacked, paste-ready code for the SDK and the new Interactions API, the pricing decision tree across the three tiers ($20 Pro, $100 Ultra, $200 Ultra top — cut from $250 today), and the five mistakes most devs will make in week one. Pillar 1: the desktop app and multi-agent orchestration — five agents on five different problems in parallel, plus scheduled background tasks. Pillar 2: the Antigravity CLI that replaces Gemini CLI (mandatory migration) and the CI-pinning rule that keeps you stable across releases. Pillar 3: the Antigravity SDK with the exact same agent harness Google uses internally — paste-ready Python template for defining a domain-specific custom agent with tool list and deployment target. Pillar 4: Managed Agents inside the Gemini API, the new Interactions API for persistent isolated environments that resume across calls, with a paste-ready managed-session code block. Pillar 5: Gemini 3.5 Flash — 4× faster than every other frontier model, outperforms 3.1 Pro on almost all benchmarks, the rule for when to use Flash vs Pro across an agent loop. The pricing decision tree as a paste-ready text block, the $100 Antigravity credit promo through May 25, and the five week-1 mistakes with the exact fix for each: staying on Gemini CLI, parallelizing on day 1, defaulting to Pro, using Managed Agents for single-shot tasks, and missing the I/O week credit window.

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