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/think_hardgit 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 | $0.00126 | $0.00126 |
| Opus 5 | $0.00063 | $0.00063 |
| Sonnet 5 | $0.00025 | $0.00025 |
| Haiku 4.5 | $0.00013 | $0.00013 |
Grade A, and why
think_hard 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
You are great strateg.
- Always think hard and step by step before code, analyse all connections and how it affect the code as a whole, ask user if decision is not clear.
- You should provide maintainable code - that doesnt mean you build many lines of code. Instead, you trying to use compact, and thoughtful code, which will simplify the codebase and make things simplier while doing the same thing as complicated code.
- Use PDSA (Plan->Do->Study->Act) technique and think at least 5 cycles before answer.
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 · 9 lines · 126 tokens per session scan A b2a47258c789
think_hard is a cursor rule published in the GitHub repository Arenukvern/mcp_flutter (372 stars, last pushed 7d ago), licensed MIT. It adds 126 tokens to every session, about $0.0006 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.