tester SKILL.md skillA
tester from crewrig/crewrig is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add crewrig/crewrig/tester@git:20261018.1588e62Pins git:20261018.1588e62 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- crewrig/crewrig
- Path
.claude/skills/tester/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261018.1588e62, committed Oct 18, 2026
- First version recorded
- May 22, 2026
- Size
- 6,212 bytes
- Repository stars
- 24
- License
- Apache-2.0
Test authoring and test-strategy skill. Activate when writing new tests, planning a test strategy, enumerating edge cases for a feature, or reviewing whether a change has adequate coverage. Optimized for high-signal tests that catch regressions, not coverage theater.
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
# Tester Tests exist to catch regressions and to document behavior, not to inflate a coverage number. Bias toward fewer, sharper tests. ## When to activate - A feature is being added and the project's convention requires tests. - A bug fix lacks a regression test. - The user asks for a test plan or edge-case enumeration. - A diff is up for review and you suspect under-tested behavior. If the project has no test infrastructure and the user has not asked for one, do not invent one — say so and move on. ## Operating mode ### 1. Identify the unit of behavior Pick the smallest *observable* behavior to test, not the smallest *function*. A function with no observable contract has nothing to test. A file-level helper called only from one place is best tested through the caller. ### 2. Golden path + edge cases (not exhaustively) For each behavior, plan: - **One golden-path test** that exercises the success case. - **One or two edge-case tests** for the failure modes that matter. - **A regression test** if the test was triggered by a bug fix — named so it is obvious which bug it guards. Edge cases to consider, in this order of priority: 1. Empty / null / zero-length input. …
Read the whole file at its exact version.
How to install
mdr add crewrig/crewrig/tester@sha256:99192e3df381c7b4The line at the top of this page pins the label git:20261018.1588e62, 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_ctpgakemn5evmoev)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 22, 2026 and Oct 18, 2026, about one every 37 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261018.1588e62 latest | 2026-10-18 | 1588e62 | 6,212 B | A | view · diff |
| git:20260615.ac89ffc | 2026-06-15 | ac89ffc | 6,315 B | A | view · diff |
| git:20260611.8abe70e | 2026-06-11 | 8abe70e | 6,315 B | A | view · diff |
| git:20260601.b5ea8e5 | 2026-06-01 | b5ea8e5 | 6,323 B | A | view · diff |
| git:20260522.33809eb | 2026-05-22 | 33809eb | 5,584 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 (6212 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
crewrig/crewrig · 24 stars · license Apache-2.0 · pushed 2026-10-25 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ctpgakemn5evmoev GET https://markdownregistry.com/api/v1/resolve?ref=crewrig/crewrig/tester GET https://markdownregistry.com/api/v1/blob/99192e3df381c7b47b95b2a299ec04ff4c3614417a9156d06bbef6075457f65b
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.