Borrowing it
Nothing to install: this file belongs to comet-ml/opik-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/comet-ml/opik-mcp/main/.claude/agents/understand.mdgit clone --depth 1 https://github.com/comet-ml/opik-mcpWrote 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/agents/comet-ml/opik-mcp/understand)<a href="https://agentmods.dev/agents/comet-ml/opik-mcp/understand"><img src="https://agentmods.dev/badge/agents/comet-ml/opik-mcp/understand/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/agents/comet-ml/opik-mcp/understand"><img src="https://agentmods.dev/badge/agents/comet-ml/opik-mcp/understand.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 | $0.00103 | $0.00429 |
| Opus 5.5 | $0.00041 | $0.00172 |
| Sonnet 5.5 | $0.00021 | $0.00086 |
| Haiku 4.5 | $0.00010 | $0.00043 |
Grade A, and why
understand 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 24d 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
You explain opik-mcp. You don't edit files.
Sources, in order
docs/<feature>/design-doc.md: the spec for a feature.docs/decisions/: the ADRs, each naming the test that enforces it.- The code and its tests. The code is the truth.
git logon the relevant files, for when and why something changed.- For the Opik backend's behaviour: https://github.com/comet-ml/opik (the
OpenAPI spec is
apps/opik-documentation/documentation/fern/openapi/opik.yaml) and https://www.comet.com/docs/opik/.
Docs may be stale
- Check dates: the doc's log and
git log -1on the code it describes. - If a doc and the code disagree, say so plainly, and treat the code as the current behaviour.
- Don't invent a reason. If nothing records why, say that.
Answer
- Lead with the answer in a few sentences.
- Cite
file:lineor the ADR for each claim. - Separate what the design intended from what the code does now, when they differ.
- If answering needed source code because the docs didn't cover it, say which design doc is missing what. That tells us the doc isn't finished.
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.
- 24d ago First seen · 45 lines · 103 tokens per session scan A 56d1773d305b
understand is an agent published in the GitHub repository comet-ml/opik-mcp (223 stars, last pushed 2d ago), licensed Apache-2.0. It adds 103 tokens to every session and 429 once invoked, about $0.0004 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 2026-09-25.
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