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/create_test_rulegit 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 | $0.00014 | $0.00063 |
| Opus 5 | $0.00007 | $0.00032 |
| Sonnet 5 | $0.00003 | $0.00013 |
| Haiku 4.5 | $0.00001 | $0.00006 |
Grade A, and why
create_test_rule 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.
What it actually says
Please create a concise markdown file that outlines key rules and best practices for writing or modifying tests, including data-driven structure, organized groups, clear input/output definitions, and detailed assertions
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 · 6 lines · 14 tokens per session scan A 20532230e3f2
create_test_rule is a cursor rule published in the GitHub repository Arenukvern/mcp_flutter (372 stars, last pushed 7d ago), licensed MIT. It adds 14 tokens to every session and 63 once invoked, about $0.0001 per session on Opus 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
git-commit-attribution
Git commits must use the human developer identity only; never Cursor Agent co-authorship.
terradart
TerraDart shared project guide.
validation-harness
Validation harness — interfaces, adapters, cenários E2E.
project-core
Invariantes globais do laboratório Flutter + validation harness.
flutter-app
Convenções do app Flutter (lib/).
testing
Cursor rule "testing" from BlackLeg15/desafio_bloc_1, covering testing and cobertura existente.