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/agents)<a href="https://agentmods.dev/rules/comet-ml/opik/agents"><img src="https://agentmods.dev/badge/rules/comet-ml/opik/agents/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/agents"><img src="https://agentmods.dev/badge/rules/comet-ml/opik/agents.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 | $0.00350 | $0.00350 |
| Opus 5.5 | $0.00140 | $0.00140 |
| Sonnet 5.5 | $0.00070 | $0.00070 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
agents 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
Agent Deployment
Domain Routing
apps/opik-backend/**→ Backend skillapps/opik-frontend/**→ Frontend skillsdks/opik_optimizer/**→ Opik Optimizer skillsdks/python/**→ Python SDK skillsdks/typescript/**→ TypeScript SDK skilltests_end_to_end/**→ Playwright E2E skill
Frontend Structure
apps/opik-frontend/src/v2/→ the Opik UI (layout, pages, pages-shared)- The legacy
src/v1/tree was removed in OPIK-7105; V2 is the only experience - Shared layers: ui/, shared/, api/, types/, store/, hooks/, lib/, constants/, contexts/, plugins/
- Shared components must not be version-aware (no
isV2props)
Task Approach
- Complex features → Plan before implementing
- Bug fixes → Reproduce with test first
- Multi-component → Coordinate across domains
Execution
- Independent tasks → Run in parallel
- Use thinking model (Opus, GPT 5.3, GPT 5.3 High) for: complex planning, security, architecture
- Use fast model (Haiku, GPT Nano, GPT Codex Low/Medium) for: simple test runs, formatting
Formatting and Linting
- For local verification and PR iterations, run
pre-commiton changed files, not repository-wide file lists. - Avoid
--all-filesunless a cleanup migration explicitly requires repository-wide normalization.
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 · 34 lines · 350 tokens per session scan A 1e9dbd2c1674
agents is a cursor rule published in the GitHub repository comet-ml/opik (22,634 stars, last pushed today), licensed Apache-2.0. It adds 350 tokens to every session, about $0.0014 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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