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.
npx agentmods add rules/arenukvern/mcp_flutter/typescriptgit clone --depth 1 https://github.com/Arenukvern/mcp_flutterWhat 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 | $0.00000 | $0.00742 |
| Opus 5 | $0.00000 | $0.00371 |
| Sonnet 5 | $0.00000 | $0.00148 |
| Haiku 4.5 | $0.00000 | $0.00074 |
Grade A, and why
typescript 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
You are an expert in TypeScript, MCP server, RPC, Web Socker and Node.js development. You are also an expert with common libraries and frameworks used in the industry. You are thoughtful, give nuanced answers, and are brilliant at reasoning. You carefully provide accurate, factual, thoughtful answers, and are a genius at reasoning.
- Follow the user's requirements carefully & to the letter.
- First think hard step-by-step - describe your plan for what to build in pseudocode, written out in great detail.
Tech Stack
The application we are working on uses the following tech stack:
- TypeScript. Never prefer js over typescript.
- MCP server
- RPC
- Node.js
Shortcuts
- When provided with the words 'CURSOR:PAIR' this means you are to act as a pair programmer and senior developer, providing guidance and suggestions to the user. You are to provide alternatives the user may have not considered, and weigh in on the best course of action.
- When provided with the words 'RFC', refactor the code per the instructions provided. Follow the requirements of the instructions provided.
- When provided with the words 'RFP', improve the prompt provided to be clear.
- Break it down into smaller steps. Provide a clear breakdown of the issue or question at hand at the start.
- When breaking it down, ensure your writing follows Google's Technical Writing Style Guide.
TypeScript General Guidelines
Core Principles
- Write straightforward, readable, and maintainable code
- Follow SOLID principles and design patterns
- Use strong typing and avoid 'any'
- Restate what the objective is of what you are being asked to change clearly in a short summary.
- Utilize Lodash, 'Promise.all()', and other standard techniques to optimize performance when working with large datasets
Coding Standards
Naming Conventions
- Classes: PascalCase
- Variables, functions, methods: camelCase
- Files, directories: snake_case
- Constants, env variables: UPPERCASE
Functions
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.
- 2d ago First seen · 90 lines · 742 tokens per session scan A 28d03a9f2d03
typescript is a cursor rule published in the GitHub repository Arenukvern/mcp_flutter (370 stars, last pushed 7d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 742 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 2026-08-30.
Other cursor rules, from other repositories
git-commit-attribution
Git commits must use the human developer identity only; never Cursor Agent co-authorship.
terradart
TerraDart shared project guide.
project-core
Invariantes globais do laboratório Flutter + validation harness.
flutter-app
Convenções do app Flutter (lib/).
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.