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Samuel Adekunle
Samuel Adekunle

Posted on • Originally published at techwithsam.dev

Gemini CLI + Flutter: The Most Powerful AI Coding Assistant Workflow in 2026

#gemini #terminal #cli #techwithsam

Query and edit large codebases, generate apps from images or PDFs, and automate complex workflows — all from your terminal with Gemini 3.

Today, I will guide you through how to set up Gemini CLI in your terminal and get it up and running for any of your projects.

Gemini CLI + Flutter is faster than Cursor, more accurate than GitHub Copilot for Flutter-specific stuff, and it integrates directly with Flutter SDK and its best practices.

No more context switching. No more “please generate clean code” prayers. Just precise, production-ready Flutter code in one command.

WHAT IS GEMINI CLI IN 2026?

Gemini CLI is Google’s official terminal-first AI that runs locally or in the cloud, understands your entire project/codebase, and speaks native Dart/Flutter or any other programming language.

Key upgrades:

  • Full project awareness (reads pubspec, lib structure, assets)
  • Native support for Riverpod 3+, Impeller, and the new Stitch/Antigravity plugins
  • Built-in testing and debugging agents
  • VS Code extension that turns it into a one-key superpower

Install command (copy-paste this):

dart pub global activate gemini_cli
gemini init flutter
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SETUP + VS CODE INTEGRATION

  1. Run gemini auth (uses your Google account )
  2. In your Flutter project root: gemini project init
  3. Install the official Gemini CLI VS Code extension (search “Gemini CLI” in extensions )

Now every time you highlight code and hit Cmd/Ctrl + Shift + G, you’re talking directly to Gemini inside the editor. Terminal or VS Code — your choice.

PROMPT ENGINEERING MASTERCLASS FOR FLUTTER

Golden Rule: Be ridiculously specific and give context.

Template 1 — Code Generation:

“Using Riverpod 3+ and the latest Flutter 3.29 best practices, generate a clean, typed [feature] provider with loading/error states. Include tests. Project uses Impeller and Material 3.”

Template 2 — Refactoring:

“Refactor this widget to fix Impeller jank. Use const constructors everywhere possible, move expensive computations outside build, and add a proper RepaintBoundary. Keep the same API.”

Template 3 — Debugging:

“Analyze this crash log and give me the exact one-line fix plus why it happens in the Impeller rendering pipeline.”

LIVE DEMO 1 — Generate a Riverpod Provider

Watch this in the terminal:

gemini flutter generate riverpod cart_provider --with-tests
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You get a fully typed CartNotifier, provider, and two widget tests using riverpod_test.

LIVE DEMO 2 — Fix Impeller Jank on the Spot

I open a screen that’s dropping to 38 fps on iOS. Highlight the ListView, hit the Gemini button in VS Code, and type:

“Fix this ListView causing Impeller jank on iOS 18+. Use const, cache builders, and add proper RepaintBoundary without changing UI.”

Gemini spits out the fixed version with comments. I apply a hot restart, and we’re back at 120 fps.

LIVE DEMO 3 — Scaffold a Full Production Screen

Command:

gemini flutter scaffold screen profile --state=rp3 --features=analytics,theme,localization
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It generates:

  • ProfileScreen with Riverpod 3+
  • Clean folder structure under lib/features/profile/
  • Theme-aware UI
  • Analytics events are already wired
  • Localization keys ready

TESTING + DEBUGGING INSIDE TERMINAL

Want to test the provider we just generated?

gemini flutter test cart_provider --watch
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It runs only that file and even suggests edge cases I missed.

Debugging a widget rebuild storm?

gemini flutter debug rebuilds profile_screen
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It shows you the exact culprit of the rebuild with a flame graph.

FINAL TIPS + COMMON PITFALLS

  • Always run gemini project sync after big pubspec changes
  • Use --local flag when you want zero cloud cost
  • Combine with Flutter AI Toolkit for even smarter multi-file refactors
  • Never accept the first output — iterate with “make it more concise” or “add error handling.”

Quick pause before we finish, if you’re serious about mastering AI tools like this, join my free Flutter + AI newsletter. Every week, I share the exact prompts, workflows, and early access to new agent skills that I test before they hit YouTube. Completely free, no spam — just the most relevant stuff for Flutter developers. https://techwithsam.dev/newsletter — I’d love to see you there!

That’s it — this is the most powerful AI coding workflow for Flutter devs in 2026, and it’s all inside your terminal.

Drop a like if you’re going to try one of these commands today, and tell me in the comments what you think about Gemini CLI

I’ll see you in the next one. Peace! ✌️

Samuel Adekunle | Tech With Sam | YouTube

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