opik-test SKILL.md skillA
opik-test 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-test@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-test/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260917.109a551, committed Sep 17, 2026
- Size
- 11,103 bytes
- Repository stars
- 25
- License
- Apache-2.0
Turn a failing Opik trace (or a described failure) into a repeatable regression check — a test-suite item with the trace's input and one or two binary assertions — so a fix can be verified by the compare skill. Works over the SDK; uses the MCP write tool when connected. Returns the suite, the item, and the assertion. Use for "turn this into a test", "add a regression case for this trace", "make sure this doesn't happen again", "capture this failure", "add this to the test suite". Not for…
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
# Test — Capture a Failing Case as a Repeatable Check **Definition of done:** one test-suite item exists in Opik that reproduces the failure — its `data` carries the failing input (and the expected output when one is known), and it has **one or two binary assertions** that would have failed on the bad trace and pass on a correct one. The item is in a named suite scoped to the project, is confirmed by reading it back, and is ready for `/opik-compare` to run. If the case can't be captured, stop at the **first** genuine blocker and return **exactly one** next step. Writing a pytest file, or describing a test in prose, is not success. Operate: **extract the case from real trace data, write assertions a judge can decide with a yes or no, store them where `/opik-compare` will find them — and change no application code.** This skill writes to Opik, never to the repo. ## Inputs The entry point is `/opik-test <trace-id>` (capture that trace), `/opik-test <describe the failure>` (find the trace, or capture from the description alone), or `/opik-test` right after `/opik-explain` (capture the trace it just explained). 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-test@sha256:cc992d100690fc82The 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_irkxqenwlyzwr5hr)
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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 (11103 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_irkxqenwlyzwr5hr GET https://markdownregistry.com/api/v1/resolve?ref=comet-ml/opik-claude-code-plugin/opik-test GET https://markdownregistry.com/api/v1/blob/cc992d100690fc823fef2f5f12a10671d4e6235f75bc79353273d3d95b2b6e0c
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.