What is flutter_catalog GEMINI.md?

Project instructions for X-Wei/flutter_catalog, a Flutter app that showcases interface components with live examples and source-code views. They cover the project structure, required services, setup, and common build commands.

They help with Flutter app development, dependency setup, code generation, and web builds.

They give an agent the context and steps needed to run, build, and modify this Flutter project correctly.

How X-Wei/flutter_catalog configures Gemini CLI

About the project

Flutter Catalog is an application that demonstrates Flutter components, which are reusable building blocks for Flutter user interfaces, alongside their source code. It serves as a reference and showcase for developers learning or working with Flutter components.

X-Wei/flutter_catalog · 2,286 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to X-Wei/flutter_catalog. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/X-Wei/flutter_catalog/master/GEMINI.md

Clone the repo

git clone --depth 1 https://github.com/X-Wei/flutter_catalog

Made for: Gemini CLI.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/x-wei/flutter_catalog/gemini-md/github.svg)](https://agentmods.dev/instructions/x-wei/flutter_catalog/gemini-md)

Your own site

<a href="https://agentmods.dev/instructions/x-wei/flutter_catalog/gemini-md"><img src="https://agentmods.dev/badge/instructions/x-wei/flutter_catalog/gemini-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/x-wei/flutter_catalog/gemini-md"><img src="https://agentmods.dev/badge/instructions/x-wei/flutter_catalog/gemini-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 685 This file is loaded in full into every session.

When invoked 685 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00685	$0.00685
Opus 5.5	$0.00274	$0.00274
Sonnet 5.5	$0.00137	$0.00137
Haiku 4.5	$0.00068	$0.00068

Measured 2mo ago against content hash 83d4e6a683af, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flutter_catalog GEMINI.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

GEMINI.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Flutter Catalog Project Overview

An interactive Flutter application showcasing a wide range of Flutter components, layouts, and features with integrated side-by-side source code views.

Project Summary

Primary Technology: Flutter & Dart
Architecture: Feature-based organization with a central routing table.
State Management: Uses a mix of flutter_riverpod and provider.
Backend/Services: Heavily integrated with Firebase (Auth, Analytics, Crashlytics, Firestore, etc.), Google Mobile Ads (AdMob), and AI services (OpenAI, Groq).
Core Functionality: Each example is a "route" that includes both the running widget and its source code. Source files are treated as assets to enable the "Code" view.

Building and Running

Prerequisites

Flutter SDK (Check .fvmrc if present for preferred version).
Firebase setup (requires firebase_options.dart and platform-specific config files like google-services.json).

Key Commands

Install Dependencies: flutter pub get
Run the App: flutter run
Build Web Version: flutter build web
Code Generation: dart run build_runner build --delete-conflicting-outputs (used for freezed, json_serializable, etc.)

Code Quality & Maintenance

Static Analysis: flutter analyze
Format Code: dart format .
Auto-fix Lint Issues: dart fix --apply
Testing: flutter test

Project Structure

lib/main.dart: Entry point, initializes Firebase and settings.
lib/my_main_app.dart: Root MaterialApp widget.
lib/my_app_routes.dart: The "brain" of the app; defines the entire catalog structure and routing table.
lib/my_route.dart: A wrapper widget for all examples, providing the backdrop and code-view toggle.
lib/routes/: Contains individual example implementations (e.g., widgets_text_ex.dart).
lib/my_app_settings.dart: Manages persistent user preferences (Dark mode, Bookmarks, etc.) using shared_preferences.
res/: Contains application assets (images, lottie animations).
packages/: Contains local package modifications or custom widgets (e.g., widget_with_codeview).

Read the full file on GitHub · 55 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 55 lines · 685 tokens per session scan A 83d4e6a683af

Subscribe to this mod's changes

flutter_catalog GEMINI.md is an instructions file published in the GitHub repository X-Wei/flutter_catalog (2,286 stars, last pushed 5mo ago), licensed MIT. It adds 685 tokens to every session, about $0.0027 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Mobile firebase flutter flutter-demo flutter-examples flutter-state-management showcasing-flutter-components

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flutter_catalog: Instructions file for Gemini CLI