opik-compare skillA
opik-compare is agent-read markdown (skill) from comet-ml/opik-claude-code-plugin: Run a candidate against the baseline over an Opik test suite and read the numbers back — which cases broke, which got fixed, the per-metric deltas, worst rows, and whether the two runs are comparable — with the Opik compare-view link. Runs via the SDK; reads results via the MCP when connected. Does not issue a ship/no-ship verdict. Use for "did my fix work", "compare against the baseline", "run the regression suite", "why did quality drop", "which cases regressed", "compare these two experiments.
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
# Compare — Candidate vs Baseline Over a Suite **Definition of done:** two experiments on the same suite — a **baseline** and a **candidate** — read back item by item, with the **per-metric deltas**, the cases that went **pass → fail** (regressions) and **fail → pass** (fixes), the worst rows, a note on whether the runs are comparable, and the **Opik compare-view link**. If only one run exists, the done state is "baseline created — rerun after the change". If the suite can't be run or read, stop at the **first** genuine blocker and return **exactly one** next step. Aggregate scores alone are not a comparison; a verdict is not this skill's job. Operate: **run the candidate the same way the baseline was run, read both back from Opik rather than from the run's console output, name the specific cases that changed — and change no application code.** The only file this skill writes is a throwaway runner outside the repo. ## Inputs …
Read the whole file at its exact version.
How to install
mdr add comet-ml/opik-claude-code-plugin/opik-compare@git:20260917.109a551mdr add comet-ml/opik-claude-code-plugin/opik-compare@sha256:73786774ec0efc5ePin 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_zlsbtosxykfh6s2v)
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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 (13624 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_zlsbtosxykfh6s2v GET https://markdownregistry.com/api/v1/resolve?ref=comet-ml/opik-claude-code-plugin/opik-compare GET https://markdownregistry.com/api/v1/blob/73786774ec0efc5e75b8e2f7d659010ca2c4393783c37a11d87eda64b3a8cd8d
Your agent 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.