opik-online-eval skillA
opik-online-eval is agent-read markdown (skill) from comet-ml/opik-claude-code-plugin: 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", "set up an online evaluation.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns 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@git:20260917.109a551mdr add comet-ml/opik-claude-code-plugin/opik-online-eval@sha256:0611da9b553d6734Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_n3ay4pshlhaeqrvs)
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Versions
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 · 23 stars · license Apache-2.0 · pushed 2026-09-21 · 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
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