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/Mithgroth/fakestore-mcpWrote 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/mithgroth/fakestore-mcp/custom-rules)<a href="https://agentmods.dev/rules/mithgroth/fakestore-mcp/custom-rules"><img src="https://agentmods.dev/badge/rules/mithgroth/fakestore-mcp/custom-rules/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/mithgroth/fakestore-mcp/custom-rules"><img src="https://agentmods.dev/badge/rules/mithgroth/fakestore-mcp/custom-rules.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 | $0.00587 | $0.00587 |
| Opus 5.5 | $0.00235 | $0.00235 |
| Sonnet 5.5 | $0.00117 | $0.00117 |
| Haiku 4.5 | $0.00059 | $0.00059 |
Grade A, and why
custom-rules 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · 47 lines · 587 tokens per session scan A ce81587ed18e
custom-rules is a cursor rule published in the GitHub repository Mithgroth/fakestore-mcp (0 stars, last pushed 1y ago), with no licence file. It adds 587 tokens to every session, about $0.0023 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 2026-09-01.
Other cursor rules, from other repositories
ruler_cursor_instructions
1) Use the "ikas" MCP list tool to find the correct query/mutation name. 2) Use the "ikas" MCP introspect tool to get the operation's full shape (variables, return fields, enums). 3) Only after confirming via list + introspect, add the document to graphql-requests.ts and run codegen.
avoid-nested-code-blocks
See README.md for more details. description: globs: alwaysApply: false.
vibe-tools
Global Rule. This rule should ALWAYS be loaded.
documentation-system
The Shipkit documentation system uses dynamic file-based loading from the /docs directory at the project root. It supports both .mdx and .md files with full production-ready security features.
payload-configuration
Shipkit conditionally initializes Payload CMS based on environment variables. The src/payload.config.ts file handles graceful degradation when no database is configured.
project
Project structure, tech stack, and rules for interacting with the project.