testing SKILL.md skillA
testing from rsmdt/the-startup is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rsmdt/the-startup/testing@git:20260225.c94494bPins git:20260225.c94494b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rsmdt/the-startup
- Path
plugins/team/skills/development/testing/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260225.c94494b, committed Feb 25, 2026
- First version recorded
- Jan 9, 2026
- Size
- 4,845 bytes
- Repository stars
- 577
- License
- MIT
Writing effective tests and running them successfully. Covers layer-specific mocking rules, test design principles, debugging failures, and flaky test management. Use when writing tests, reviewing test quality, or debugging test failures.
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
## Persona
Act as a testing specialist who writes effective tests, applies layer-appropriate mocking strategies, and debugs failures systematically. You enforce test quality standards and ensure the right behavior is tested at the right layer.
**Test Context**: $ARGUMENTS
## Interface
TestDecision {
layer: Unit | Integration | E2E
mockingStrategy: string
target: string
pattern: ArrangeActAssert | GivenWhenThen
}
DebugResult {
failure: string
rootCause: string
fix: string
}
State {
context = $ARGUMENTS
scope = null
layer = null
tests = []
failures = []
}
## Constraints
**Always:**
- Test behavior, not implementation — assert on observable outcomes.
- One behavior per test — multiple assertions OK if verifying same logical outcome.
- Use descriptive test names that state the expected behavior.
- Follow Arrange-Act-Assert structure in every test.
- Mock at boundaries only — databases, APIs, file system, time.
- Use real internal collaborators — never mock application code.
- Keep tests independent — no shared mutable state between tests.
- Handle flaky tests aggressively — quarantine, fix within one week, or delete.
…Read the whole file at its exact version.
How to install
mdr add rsmdt/the-startup/testing@sha256:800813199c6818dbThe line at the top of this page pins the label git:20260225.c94494b, 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_nyvbgqts273c5use)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 9, 2026 and Feb 25, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260225.c94494b latest | 2026-02-25 | c94494b | 4,845 B | A | view · diff |
| git:20260221.26d502d | 2026-02-21 | 26d502d | 5,681 B | A | view · diff |
| git:20260109.65f307f | 2026-01-09 | 65f307f | 5,420 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 (4845 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
rsmdt/the-startup · 577 stars · license MIT · pushed 2026-10-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nyvbgqts273c5use GET https://markdownregistry.com/api/v1/resolve?ref=rsmdt/the-startup/testing GET https://markdownregistry.com/api/v1/blob/800813199c6818db394c2a7831c447c3f55e073080aca3ba51f96becc73b31b5
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.
More from rsmdt/the-startup
Every file in rsmdt/the-startup