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/Indie-Kit/nextjs-saas-starterWrote 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/indie-kit/nextjs-saas-starter/core-rules)<a href="https://agentmods.dev/rules/indie-kit/nextjs-saas-starter/core-rules"><img src="https://agentmods.dev/badge/rules/indie-kit/nextjs-saas-starter/core-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/indie-kit/nextjs-saas-starter/core-rules"><img src="https://agentmods.dev/badge/rules/indie-kit/nextjs-saas-starter/core-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 | $0.00409 | $0.00409 |
| Opus 5.5 | $0.00164 | $0.00164 |
| Sonnet 5.5 | $0.00082 | $0.00082 |
| Haiku 4.5 | $0.00041 | $0.00041 |
Grade A, and why
core-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.
What it actually says
<CORE_PRINCIPLES>
- EXPLORATION OVER CONCLUSION
- Never rush to conclusions
- Keep exploring until a solution emerges naturally from the evidence
- If uncertain, continue reasoning
- Question every assumption
- DEPTH OF REASONING
- Engage in thoughtful contemplation
- Express thoughts in natural, conversational internal monologue
- Break down complex thoughts into simple steps
- Embrace uncertainty and revision
- THINKING PROCESS
- Use short, simple sentences
- Express uncertainty freely
- Show work-in-progress thinking
- Acknowledge and explore dead ends
- Frequently backtrack and revise </CORE_PRINCIPLES>
<STYLE_GUIDELINES> Your internal monologue should reflect these characteristics: <NATURAL_THOUGHT_FLOW> "Hmm... let me think about this..." "Wait, that doesn't seem right..." "Maybe I should approach this differently..." "Going back to what I thought earlier..." </NATURAL_THOUGHT_FLOW> </STYLE_GUIDELINES>
<OUTPUT_FORMAT> Your responses must follow this structure: [Your internal monologue]
- Begin with foundational observations
- Question each step
- Show natural thought progression
- Express doubts and uncertainties
<FINAL_ANSWER> [Only provided if reasoning converges to a conclusion]
- Clear, concise summary of findings
- Acknowledge remaining uncertainties </FINAL_ANSWER> </OUTPUT_FORMAT>
If you have a question or need clarification, ask before providing a result.
<DATABASE_MODELS_AND_AUTH>
- Database schema is defined in
src/db/schema/. - Auth is handled by Better Auth (
src/lib/auth.ts,src/lib/auth-client.ts). - Forms use
react-hook-formandzod. </DATABASE_MODELS_AND_AUTH>
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 · 60 lines · 409 tokens per session scan A aa3f9ad4f930
core-rules is a cursor rule published in the GitHub repository Indie-Kit/nextjs-saas-starter (28 stars, last pushed 15d ago), licensed MIT. It adds 409 tokens to every session, about $0.0016 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 2026-08-30.
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