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/PerkyZZ999/MemorizedMCPWrote 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/perkyzz999/memorizedmcp/react-best-practices-and-standard-full-guide-2025)<a href="https://agentmods.dev/rules/perkyzz999/memorizedmcp/react-best-practices-and-standard-full-guide-2025"><img src="https://agentmods.dev/badge/rules/perkyzz999/memorizedmcp/react-best-practices-and-standard-full-guide-2025/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/perkyzz999/memorizedmcp/react-best-practices-and-standard-full-guide-2025"><img src="https://agentmods.dev/badge/rules/perkyzz999/memorizedmcp/react-best-practices-and-standard-full-guide-2025.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 | $0.05127 | $0.05127 |
| Opus 5.5 | $0.02051 | $0.02051 |
| Sonnet 5.5 | $0.01025 | $0.01025 |
| Haiku 4.5 | $0.00513 | $0.00513 |
Grade A, and why
react-best-practices-and-standard-full-guide-2025 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 2mo 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 — 867 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React 19 Best Practices and Standards: A Comprehensive Guide
Table of Contents
- React 19 Best Practices and Standards: A Comprehensive Guide
- Table of Contents
- Core React 19 Features and Best Practices
- Component Architecture and Design Patterns
- TypeScript Integration Best Practices
- State Management Best Practices
- Performance Optimization Strategies
- Project Structure and Organization
- Testing Best Practices
- Accessibility Best Practices
- Security Best Practices
- Modern Development Workflow
- Future-Proofing Your React Applications
- Conclusion
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.
- 2mo ago First seen · 867 lines · 5,127 tokens per session scan A 9f6c41ff8598
react-best-practices-and-standard-full-guide-2025 is a cursor rule published in the GitHub repository PerkyZZ999/MemorizedMCP (7 stars, last pushed 1y ago), licensed MIT. It adds 5,127 tokens to every session, about $0.0205 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 2026-08-31.
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