flutter-clean-arch

flutter-clean-arch is a cursor rule for Cursor from b-fontaine/devoxx-2026. It costs 0 tokens per session (319 once invoked), scanned A, original, MIT.

A set of rules for structuring Flutter applications with Clean Architecture, a design that separates business logic, data access, and screens, using Flutter Bloc and behavior-driven development.

In plain words
What is it for?
Use it when building Flutter features with domain, data, and presentation layers, Bloc or Cubit state management, dependency injection, and Given-When-Then scenarios.
Why use it?
It gives the project consistent boundaries, state handling, dependency setup, and user-behavior tests.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/b-fontaine/devoxx-2026/flutter-clean-arch
Clone the repo
git clone --depth 1 https://github.com/b-fontaine/devoxx-2026

Made for: Cursor.

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.

agentmods badge for flutter-clean-arch

README.md
[![agentmods](https://agentmods.dev/badge/rules/b-fontaine/devoxx-2026/flutter-clean-arch.svg)](https://agentmods.dev/rules/b-fontaine/devoxx-2026/flutter-clean-arch)
Your own site
<a href="https://agentmods.dev/rules/b-fontaine/devoxx-2026/flutter-clean-arch"><img src="https://agentmods.dev/badge/rules/b-fontaine/devoxx-2026/flutter-clean-arch.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 319 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00319
Opus 5 $0.00000 $0.00160
Sonnet 5 $0.00000 $0.00064
Haiku 4.5 $0.00000 $0.00032

Measured 4d ago against content hash 37146eeab0bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

flutter-clean-arch 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 4d 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.

.cursor/rules/flutter-clean-arch.mdc · 48 lines

What it actually says

Flutter Clean Architecture

Structure par feature

Chaque feature suit : domain/ → data/ → presentation/ Les dépendances pointent vers l'intérieur uniquement.

State Management

  • Un Bloc ou Cubit par feature/page
  • States immutables avec freezed
  • Events nommés : <Feature><Action> (ex: ReportAnomalySubmitted)
  • States nommés : <Feature>State avec factory constructors (initial, loading, loaded, error)

Dependency Injection

  • Annotations @injectable sur les classes concrètes
  • Annotations @singleton sur les datasources et clients HTTP
  • Enregistrer dans injection_container.dart via configureDependencies()

Tests BDD

  • Fichiers .feature dans test/features/<feature_name>/
  • Steps générés par bdd_widget_test
  • Chaque scénario teste un comportement utilisateur, pas une implémentation

Patterns obligatoires

// Use case
class GetAnomalyReports implements UseCase<List<AnomalyReport>, NoParams> {
  final AnomalyRepository repository;
  // ...
}

// Repository contract (domain)
abstract class AnomalyRepository {
  Future<Either<Failure, List<AnomalyReport>>> getReports();
}

// Bloc
class ReportAnomalyBloc extends Bloc<ReportAnomalyEvent, ReportAnomalyState> {
  final SubmitAnomalyReport submitReport;
  // ...
}
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.

  1. 4d ago First seen · 48 lines · 0 tokens per session scan A 37146eeab0bd

Subscribe to this mod's changes

flutter-clean-arch is a cursor rule published in the GitHub repository b-fontaine/devoxx-2026 (5 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 319 tokens. 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 2026-08-31.