opik-compare SKILL.md skillA
opik-compare 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-compare@git:20260921.9843278Pins git:20260921.9843278 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-compare/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260921.9843278, committed Sep 21, 2026
- First version recorded
- Sep 17, 2026
- Size
- 13,905 bytes
- Repository stars
- 25
- License
- Apache-2.0
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…
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
# 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@sha256:0dbe6d16e88776b8The line at the top of this page pins the label git:20260921.9843278, 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_zlsbtosxykfh6s2v)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 17, 2026 and Sep 21, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260921.9843278 latest | 2026-09-21 | 9843278 | 13,905 B | A | view · diff |
| git:20260917.109a551 | 2026-09-17 | 109a551 | 13,624 B | A | view |
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 (13905 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_zlsbtosxykfh6s2v GET https://markdownregistry.com/api/v1/resolve?ref=comet-ml/opik-claude-code-plugin/opik-compare GET https://markdownregistry.com/api/v1/blob/0dbe6d16e88776b8032518a05c884993f5b14ebb21081952edd997b8d025b5b5
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.