opik-online-eval SKILL.md skillA
opik-online-eval from comet-ml/opik-claude-code-plugin is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add comet-ml/opik-claude-code-plugin/opik-online-eval@git:20260917.109a551Pins git:20260917.109a551 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- comet-ml/opik-claude-code-plugin
- Path
skills/opik-online-eval/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260917.109a551, committed Sep 17, 2026
- Size
- 12,039 bytes
- Repository stars
- 25
- License
- Apache-2.0
Take a judge live on production traffic — create an Opik online evaluation rule (LLM-as-judge or Python metric) on a project with sampling, filters, variable mapping, and a cost cap, then confirm new traces are being scored. Works over the SDK's REST client; reads rules and score names via the MCP when connected. Returns the rule, the score name it emits, and how to watch it. Use for "score production traces", "monitor hallucinations in prod", "take this judge live…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Online Eval — Take a Judge Live
**Definition of done:** an **online evaluation rule exists on the project, is enabled, and has scored at least one new trace** — confirmed by reading a fresh trace's feedback score, not by the create call returning. The rule scores one failure mode, samples at a rate the project's volume can afford, carries a cost cap, and maps its variables to the fields the traces actually have. If traffic hasn't arrived yet, the done state is "rule live, unverified — watch this filter". If the rule can't be created, stop at the **first** genuine blocker and return **exactly one** next step.
Operate: **one failure mode per rule, sample before you scale, cap the spend, verify on a real trace — and change no application code.** This skill writes to Opik only.
## Inputs
The entry point is `/opik-online-eval <what to score>` ("hallucinations", "the refund-window answer", "refusals"), `/opik-online-eval` right after `/opik-evaluate` validated a judge (take that judge live), or `/opik-online-eval <project>`. Infer the rest; treat these as **optional overrides**:
…Read the whole file at its exact version.
How to install
mdr add comet-ml/opik-claude-code-plugin/opik-online-eval@sha256:0611da9b553d6734The line at the top of this page pins the label git:20260917.109a551, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_n3ay4pshlhaeqrvs)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 17, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12039 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
comet-ml/opik-claude-code-plugin · 25 stars · license Apache-2.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_n3ay4pshlhaeqrvs GET https://markdownregistry.com/api/v1/resolve?ref=comet-ml/opik-claude-code-plugin/opik-online-eval GET https://markdownregistry.com/api/v1/blob/0611da9b553d67341ece9a3c7ef266201eaaa9b390b2fc620a7abcb152f8e798
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.