Opik is an open-source platform for tracing, evaluating, and monitoring applications that use large language models, retrieval systems, or AI agents. Teams use it to inspect agent activity, manage prompts, run evaluations, and monitor these applications in production.
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/comet-ml/opikWrote 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/comet-ml/opik/code-style)<a href="https://agentmods.dev/rules/comet-ml/opik/code-style"><img src="https://agentmods.dev/badge/rules/comet-ml/opik/code-style/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/comet-ml/opik/code-style"><img src="https://agentmods.dev/badge/rules/comet-ml/opik/code-style.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 | $0.00170 | $0.00170 |
| Opus 5.5 | $0.00068 | $0.00068 |
| Sonnet 5.5 | $0.00034 | $0.00034 |
| Haiku 4.5 | $0.00017 | $0.00017 |
Grade A, and why
code-style 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
Code Style
Comments
- Don't add comments that restate what code does
- Don't add JSDoc/docstrings unless required by the codebase
- Only comment why, not what
- No "Added by Claude" or attribution comments
- No placeholder TODOs like
// TODO: implement
Don't Over-Engineer
- No helper functions for one-time operations
- No abstractions for single use cases
- No extra error handling "just in case"
- No backwards-compatibility shims when changing code directly works
Stay Focused
- Only modify code relevant to the task
- No drive-by refactoring of unrelated code
- No reformatting lines you didn't change
- No adding type annotations where inference works
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 · 26 lines · 170 tokens per session scan A 8b8d925821d5
code-style is a cursor rule published in the GitHub repository comet-ml/opik (22,634 stars, last pushed today), licensed Apache-2.0. It adds 170 tokens to every session, about $0.0007 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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