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.
npx agentmods add rules/panozzaj/cursor-rules/three-jsgit clone --depth 1 https://github.com/panozzaj/cursor-rulesWhat 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 | $0.00177 | $0.00177 |
| Opus 5 | $0.00088 | $0.00088 |
| Sonnet 5 | $0.00035 | $0.00035 |
| Haiku 4.5 | $0.00018 | $0.00018 |
Grade A, and why
three-js 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 yesterday.
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
Three (library)
Ensure that all THREE.Vectors correctly have a closing parenthesis at the end. Otherwise we get a syntax error.
Example of failure case:
startPoint = new THREE.Vector3(
points[0].x,
points[0].y,
points[0].z + startPercent * stripeLength * Math.sign(points[1].z - points[0].z)
}
Example of success case:
endPoint = new THREE.Vector3(
points[0].x,
points[0].y,
points[0].z + endPercent * stripeLength * Math.sign(points[1].z - points[0].z)
)
Definitely do not fix with sed and/or create .bak files.
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.
- yesterday First seen · 31 lines · 177 tokens per session scan A 8b5456ef442a
three-js is a cursor rule published in the GitHub repository panozzaj/cursor-rules (3 stars, last pushed 1y ago), licensed MIT. It adds 177 tokens to every session, about $0.0009 per session on Opus 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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