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Muhammad Awais
Muhammad Awais

Posted on • Originally published at webtoolshub.online

Google Antigravity IDE 2.0 Broke My Next.js Setup — Here's How I Fixed It (And Whether It's Worth Using)

Google Antigravity IDE 2.0 Complete Guide for Next.js Developers (2026)

On May 20, 2026, I opened my project in Antigravity IDE and found something unexpected. My terminal was gone. The error indicators had disappeared. The familiar VS Code-style interface was replaced with a chat panel and a "Manager View" I hadn't asked for.

Google had auto-updated Antigravity to 2.0 overnight — without warning — and broken the workflow I'd spent three months building.

I spent the next few hours figuring out what changed and how to get back to productive work. This is everything I learned.


What Antigravity 2.0 Actually Is

Most developers think Antigravity 2.0 is just an updated AI editor. It's not.

Announced at Google I/O on May 19, 2026, it's now a five-surface agent orchestration platform:

  • Desktop App — the new default, rebuilt from scratch
  • Antigravity CLI — replaces Gemini CLI on June 18, 2026
  • SDK — for embedding agents in your own tools
  • Managed Agents API — hosted agent infrastructure inside Gemini API
  • Enterprise Agent Platform — Google Cloud integration layer

The original VS Code-based IDE still exists but you have to download it separately now. This is why thousands of devs woke up to broken setups — the auto-update installed 2.0 and removed the traditional IDE as the primary surface without any migration path.

If you're currently dealing with a blank screen or broken terminal after the update, I wrote a separate Antigravity IDE blank screen fix guide that covers the most common post-update issues step by step.


Manager View vs Editor View — The Key Mental Shift

The biggest adjustment in 2.0 is the interface split.

Manager View (new default) is a mission control dashboard. You describe a task in natural language, Antigravity dispatches agents to plan and execute, and you get review checkpoints before anything gets written to disk.

Editor View is the direct coding surface — closer to Antigravity 1.x. You access it from Manager View or the Editor tab.

The mental shift: you're no longer typing code with AI assistance. You're directing agents who write code on your behalf.

For repetitive scaffolding tasks this is faster. For precise, nuanced edits where you know exactly what you want — Editor View or Claude Code is more efficient.


Setting Up AGENTS.md for Next.js (The Most Important Step)

The single most important config step is your AGENTS.md file. Without it, agents default to generic Next.js conventions that probably don't match your project.

Here's what works well for a Next.js 15 App Router project:

# My Project (Next.js 15 App Router)

## Stack
Next.js 15.3 App Router, TypeScript 5.9 strict, Tailwind CSS v4,
MongoDB with Mongoose, deployed on Vercel

## Commands
- Dev: `npm run dev`
- Type check: `npm run typecheck`
- Lint: `npm run lint`
- Build: `npm run build`

## Conventions
- Named exports only, never default exports
- Server components by default, `'use client'` only when necessary
- TypeScript strict mode — no `any` types
- Tailwind utility classes only, no inline styles
- `@/` alias for all internal imports

## Boundaries
### Ask before doing
- Changes to `/src/models/` — schema changes affect all data
- New npm dependencies

### Never do
- Add TypeScript `any`
- Direct database edits
- Modify `.env.local` values in code
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For a deeper dive, the complete AGENTS.md guide for Next.js has copy-paste templates for all five sections.


Running a Multi-Agent Mission (Real Example)

This is where Antigravity 2.0 genuinely shines. Here's a real mission I ran on my project:

Mission: "Add a new blog category called 'Tools' with its own
listing page, update the navigation, and add a category filter
to the existing blog listing page."
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Without Antigravity, this is a 45-minute task across four files. With a well-scoped mission, Antigravity dispatches:

  • A planning agent that maps required changes across your codebase
  • A UI agent handling navigation update and filter component
  • A routing agent creating the new category page and dynamic route
  • A verification agent running your type checker and linter after each change

The checkpoint system is what makes this not "vibe coding." Before the agent writes to any file, it shows you a plan — what it intends to change and why. You approve, redirect, or reject before execution.

Tip: Keep missions scoped. "Add a blog category with listing page" = good mission. "Refactor the entire blog system" = too broad, parallel agents start touching overlapping files.


Antigravity 2.0 vs Cursor vs Claude Code — Honest Verdict

I use all three. Here's where each actually wins for Next.js:

Daily coding work

Cursor wins. Faster completions, more fluid chat, VS Code compatibility means your extensions and muscle memory work. Cursor has 18 months more polish on its editor experience.

Multi-file agentic tasks

Antigravity wins on parallel execution. For tasks spanning 5+ files with a clear spec, Manager View is genuinely faster. For accuracy on complex tasks, Claude Code still has the higher SWE-Bench score but runs sequentially.

Cost

Antigravity wins on free tier. Free includes Gemini 3.5 Flash, Claude Sonnet 4.6, and GPT-OSS 120B with rotating rate limits. Cursor's free tier is far more restricted.

Next.js App Router specifically

Claude Code + Cursor is still the strongest combo. Claude Code's understanding of App Router conventions, server components, and server actions is consistently more accurate than Gemini 3.5. For a TypeScript-heavy Next.js codebase, this matters a lot.

Want the full breakdown of all the 2026 AI coding tools? The complete comparison of Claude Code vs Cursor vs GitHub Copilot has benchmark scores and workflow recommendations.


Pricing (June 2026)

Tier Models Price
Free Gemini 3.5 Flash, Claude Sonnet 4.6, GPT-OSS 120B $0
Individual + Gemini 3.1 Pro, Claude Opus 4.8, background tasks ~$19/mo
Credit packs Burst usage without subscription Pay as you go

My recommendation: Start with the free tier for two weeks on your actual project before paying. The rate limits are annoying but sufficient for evaluating fit. Use the LLM API Cost Calculator to compare credit-pack costs vs direct API usage.


Known Issues Right Now (June 2026)

Terminal missing after update — The terminal panel was removed in 2.0. Use Editor View or run a separate terminal window. The post-update fix guide has recovery steps.

Context window lag — Long sessions accumulate history and slow the UI. Fix: restart session every 45-60 minutes. AGENTS.md reloads automatically.

Gemini CLI shutdown on June 18 — If you're using Gemini CLI, migrate to Antigravity CLI before the cutoff. Commands map directly, same functionality under the agy prefix.

No MCP support — Unlike Claude Code and GitHub Copilot Agent Mode, Antigravity 2.0 has no MCP server support. If your workflow uses MCP integrations (Stripe, Figma, databases), you'll need a different tool for those tasks.

Parallel agents overlapping files — In multi-agent missions, agents occasionally try to edit the same files and create conflicts. Keep mission scope tight — one feature area per mission.


Should You Switch from Cursor?

No, not as a full replacement. But as a complementary tool for specific tasks — yes.

The workflow I'm running right now: Antigravity 2.0 for scaffolding new pages, Cursor for component refinement, Claude Code for complex server actions and data layer work. Each one is clearly better at its lane, and a shared AGENTS.md means all three agents understand my project conventions from the first prompt.

If you're evaluating the full 2026 AI coding landscape, also check out the AWS Kiro IDE comparison and the Google I/O 2026 developer announcements for more context on where these tools are heading.


What's your setup right now? Still on Cursor, trying Antigravity, or using something else entirely? Drop it in the comments.

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