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.
git clone --depth 1 https://github.com/beel-collab/presets.devWrote 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.
[](https://agentmods.dev/rules/beel-collab/presets.dev/flutter-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/flutter-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/flutter-rules/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.
<a href="https://agentmods.dev/rules/beel-collab/presets.dev/flutter-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/flutter-rules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.01021 |
| Opus 5.5 | $0.00000 | $0.00408 |
| Sonnet 5.5 | $0.00000 | $0.00204 |
| Haiku 4.5 | $0.00000 | $0.00102 |
Grade A, and why
flutter-rules 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Rules for Cursor: Widgets, Async UI and Platform Builds
Install
Install the native export at .cursor/rules/flutter-rules.mdc.
Copy that export, not this catalog file. Catalog fields such as tools and author are for presets.dev.
Install one skill file per name. Cursor, GitHub Copilot, Codex, Antigravity CLI, and Devin can all read .agents/skills, so a second copy with the same name collides.
Flutter Rules for Cursor: Widgets, Async UI and Platform Builds
File-scoped Cursor rule for Flutter. It attaches when a matching file is in context.
Updated for Flutter 3.50, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Write for the Flutter version in pubspec.yaml and the SDK constraint. Flutter 3.50, with Dart 3.14, is the current stable release. Direct native interop is stable there, and new projects use the standalone material_ui and cupertino_ui packages. Do not bump a 3.47 app unless the task asks. Do not edit generated files under .dart_tool or plugin registries.
Project shape
Widgets are small. A screen composes widgets. State that outlives a screen lives in the project's state solution, not in a global mutable singleton you add today. Follow the existing folder split: ui, data, and domain, or whatever the repo already has.
BuildContext is only valid while the element is mounted. After await, check context.mounted before you use context for navigation, a theme, or setState.
Async UI
A future or a stream the widget owns is disposed. A StreamSubscription is canceled in dispose. Do not call setState after dispose. Show loading, empty, and error states. An error that only prints to the console looks like a frozen spinner.
Platform builds
Android and iOS configuration stay in the files the project already owns. A Kotlin migration is a named task, not a side effect of a Dart change. Read the current Gradle and Kotlin versions before you touch them. Platform channels have a typed contract. Do not pass an untyped map when the project has a pigeon or a freezed model for it.
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.
- today First seen · 101 lines · 0 tokens per session scan A e3238a541307
flutter-rules is a cursor rule published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,021 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 2026-11-13.
flutter-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| flutter-rulesbeel-collab/presets.dev | Cursor rule | 3 | yesterday | MIT | A | 0 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 190k | 15d ago | MIT | A | 604 | Cursor |
| angular-20angular/angular | Cursor rule | 101k | today | MIT | A | 0 | Cursor |
| dev-standardapache/superset | Cursor rule | 76k | today | Apache-2.0 | A | 1,147 | Cursor |
| prefer-direct-imports-over-module-mocksprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| config-validation-and-normalizationprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| control-plane-descriptorsprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |