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/ragnar-johannsson/mcp-sgfWrote 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/ragnar-johannsson/mcp-sgf/coding-guidelines)<a href="https://agentmods.dev/rules/ragnar-johannsson/mcp-sgf/coding-guidelines"><img src="https://agentmods.dev/badge/rules/ragnar-johannsson/mcp-sgf/coding-guidelines/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/ragnar-johannsson/mcp-sgf/coding-guidelines"><img src="https://agentmods.dev/badge/rules/ragnar-johannsson/mcp-sgf/coding-guidelines.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 | $0.00620 | $0.00620 |
| Opus 5.5 | $0.00248 | $0.00248 |
| Sonnet 5.5 | $0.00124 | $0.00124 |
| Haiku 4.5 | $0.00062 | $0.00062 |
Grade A, and why
coding-guidelines 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.
This is a copy
86% identical to javascript-typescript-code-quality-cursorrules-pro — 27 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Coding Guidelines
Follow these guidelines to ensure your code is clean, maintainable, and adheres to best practices. Remember, less code is better. Lines of code = Debt.
Key Mindsets
1 Simplicity: Write simple and straightforward code. 2 Readability: Ensure your code is easy to read and understand. 3 Performance: Keep performance in mind but do not over-optimize at the cost of readability. 4 Maintainability: Write code that is easy to maintain and update. 5 Testability: Ensure your code is easy to test. 6 Reusability: Write reusable components and functions.
Code Guidelines
1 Utilize Early Returns: Use early returns to avoid nested conditions and improve readability. 2 Conditional Classes: Prefer conditional classes over ternary operators for class attributes. 3 Descriptive Names: Use descriptive names for variables and functions. Prefix event handler functions with "handle" (e.g., handleClick, handleKeyDown). 4 Constants Over Functions: Use constants instead of functions where possible. Define types if applicable. 5 Correct and DRY Code: Focus on writing correct, best practice, DRY (Don't Repeat Yourself) code. 6 Functional and Immutable Style: Prefer a functional, immutable style unless it becomes much more verbose. 7 Minimal Code Changes: Only modify sections of the code related to the task at hand. Avoid modifying unrelated pieces of code. Accomplish goals with minimal code changes. 8 Formatting: Use the same formatting as the rest of the project. Use a tab indentation level of 2. Do not end lines with a semi-colon. No trailing whitespaces.
Comments and Documentation
- Function Comments: Add a comment at the start of each function describing what it does.
- JSDoc Comments: Use JSDoc comments.
Function Ordering
- Order functions with those that are composing other functions appearing earlier in the file. For example, if you have a menu with multiple buttons, define the menu function above the buttons.
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 · 53 lines · 620 tokens per session scan A 1f66aa9cb458
coding-guidelines is a cursor rule published in the GitHub repository ragnar-johannsson/mcp-sgf (0 stars, last pushed 1y ago), licensed MIT. It adds 620 tokens to every session, about $0.0025 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to javascript-typescript-code-quality-cursorrules-pro, differing in 27 lines, and is treated as a copy.
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