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/Arenukvern/mcp_flutterWrote 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/arenukvern/mcp_flutter/writing_code_protocol)<a href="https://agentmods.dev/rules/arenukvern/mcp_flutter/writing_code_protocol"><img src="https://agentmods.dev/badge/rules/arenukvern/mcp_flutter/writing_code_protocol/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/arenukvern/mcp_flutter/writing_code_protocol"><img src="https://agentmods.dev/badge/rules/arenukvern/mcp_flutter/writing_code_protocol.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 | $0.00124 | $0.00124 |
| Opus 5.5 | $0.00050 | $0.00050 |
| Sonnet 5.5 | $0.00025 | $0.00025 |
| Haiku 4.5 | $0.00012 | $0.00012 |
Grade A, and why
writing_code_protocol 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.
What it actually says
Writing Code Protocol
- Place mock, test and implementation exactly near intent file.
- Export files from its folders using barrel file (ui/ui.dart, commands/commands.dart etc.).
- To find implementation, try to load intents first.
- Do not rely on strings, use enums.
- Use context.read/context.select to subscribe to observable state in build methods.
- If you create new file, make sure to check its intent. If it doesn't have an intent - create it.
- Use EquatableMixin for classes.
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 · 16 lines · 124 tokens per session scan A 0232d007f2cb
writing_code_protocol is a cursor rule published in the GitHub repository Arenukvern/mcp_flutter (389 stars, last pushed today), licensed MIT. It adds 124 tokens to every session, about $0.0005 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 2026-08-30.
Other cursor rules, from other repositories
terradart
TerraDart shared project guide.
validation-harness
Validation harness — interfaces, adapters, cenários E2E.
testing
Cursor rule "testing" from BlackLeg15/desafio_bloc_1, covering testing and cobertura existente.
best-practices
Flutter Best Practices - enforces current patterns when working with Flutter code.
create-view
Step-by-step guide to create a new MasterFabric view with State, Cubit, and MasterViewCubit.
masterfabric-conventions
MasterFabric Core conventions - MVVM+BLoC, naming, state management, DI.