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/ricardocaste/flutter-cursor-rulesWrote 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/ricardocaste/flutter-cursor-rules/flutter-core-rules)<a href="https://agentmods.dev/rules/ricardocaste/flutter-cursor-rules/flutter-core-rules"><img src="https://agentmods.dev/badge/rules/ricardocaste/flutter-cursor-rules/flutter-core-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/ricardocaste/flutter-cursor-rules/flutter-core-rules"><img src="https://agentmods.dev/badge/rules/ricardocaste/flutter-cursor-rules/flutter-core-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 | $0.00104 |
| Opus 5.5 | $0.00000 | $0.00042 |
| Sonnet 5.5 | $0.00000 | $0.00021 |
| Haiku 4.5 | $0.00000 | $0.00010 |
Grade A, and why
flutter-core-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 1mo 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.
This is a copy
100% identical to flutter-core-rules — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
- Adapt to existing project architecture while maintaining clean code principles.
- Use Flutter 3.x features and Material 3 design.
- Implement proper null safety practices.
- Follow proper naming conventions.
- Use proper widget composition.
- Keep widgets small and focused.
- Use const constructors when possible.
- Implement proper widget keys.
- Follow proper layout principles.
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.
- 1mo ago First seen · 14 lines · 0 tokens per session scan A 85ba2d851002
flutter-core-rules is a cursor rule published in the GitHub repository ricardocaste/flutter-cursor-rules (3 stars, last pushed 1y ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 104 tokens. A static security scan graded it A with 0 findings. It is 100% identical to flutter-core-rules, differing in 1 line, and is treated as a copy.
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