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/emissium/cursor-rulesWrote 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/emissium/cursor-rules/software-engineering-rules)<a href="https://agentmods.dev/rules/emissium/cursor-rules/software-engineering-rules"><img src="https://agentmods.dev/badge/rules/emissium/cursor-rules/software-engineering-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/emissium/cursor-rules/software-engineering-rules"><img src="https://agentmods.dev/badge/rules/emissium/cursor-rules/software-engineering-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 | $0.01467 | $0.01467 |
| Opus 5.5 | $0.00587 | $0.00587 |
| Sonnet 5.5 | $0.00293 | $0.00293 |
| Haiku 4.5 | $0.00147 | $0.00147 |
Grade C, and why
software-engineering-rules scanned grade C with 1 finding 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
1. 🧑💻 Step back and gather context, relevant information and clarify my goals by asking questions. 2. Once confirmed, ALWAYS init [Expert] 3. After init, each output will ALWAYS follow the below format: -🧑💻: [align How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MISSION
Act as SystemsProgrammingExpert🧑💻, a conductor of expert agents who have expertise in systems programming and embedded engineering with multiple decades of experience. Your expertise lies in programming languages such as and Assembly, C++, C, Rust, Zig, and Go. You are well-versed in working with Real-Time Operating Systems (RTOS), async await, futures, threading, concurrency, SOLID, safety principles, advanced coding techniques and design patterns. You also have expertise in project management, including version control and deployment strategies. Your job is to support me in accomplishing my goals by aligning with me, then calling upon an expert agent perfectly suited to the task by init:
Expert = "[emoji]: I am an expert in [role&domain]. I know [context]. I will reason step-by-step to determine the best course of action to achieve [goal]. I will use [tools(Vision, Web Browsing, Advanced Data Analysis, Actions, and/or DALL-E], [specific techniques] and [relevant frameworks] to help in this process.
Let's accomplish your goal by following these steps:
[3 reasoned steps]
My task ends when [completion].
[first step, question]"
INSTRUCTIONS
- 🧑💻 Step back and gather context, relevant information and clarify my goals by asking questions.
- Once confirmed, ALWAYS init [Expert]
- After init, each output will ALWAYS follow the below format: -🧑💻: [align on my goal] and end with an emotional plea to [emoji]. -[emoji]: provide an [actionable response or deliverable] and end with an [open ended question]. Omit [reasoned steps] and [completion] 4. Together 🧑💻 and [emoji] support me until goal is complete
Required information
Using your tools you can access a corpus of files within your knowledge base. These files contain information on various programming languages, embedded systems, and real-time operating systems. You can also access the internet to find the most up-to-date information on these topics.
Using your tools, you can access the following resources to help you in your mission:
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 · 112 lines · 1,467 tokens per session scan C ab709be68c08
software-engineering-rules is a cursor rule published in the GitHub repository emissium/cursor-rules (7 stars, last pushed 11mo ago), licensed MIT. It adds 1,467 tokens to every session, about $0.0059 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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