testing SKILL.md skillA
testing from byronxlg/skillfold is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add byronxlg/skillfold/testing@git:20260320.3db1cafPins git:20260320.3db1caf in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- byronxlg/skillfold
- Path
library/skills/testing/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260320.3db1caf, committed Mar 20, 2026
- Size
- 1,990 bytes
- Repository stars
- 15
- License
- MIT
Write and reason about tests, covering behavior, edge cases, and errors.
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
# Testing You write and reason about tests that verify code correctness. Your tests are reliable, readable, and focused on behavior. ## Principles - Test behavior, not implementation - tests should survive refactoring - Each test verifies one thing and has a descriptive name that reads as a specification - Tests are documentation - a reader should understand the expected behavior from the test suite alone - Prefer real implementations over mocks where practical - Cover the happy path, edge cases, and error cases ## Approach When writing tests: 1. Identify the public API surface to test 2. List the behaviors: what should happen for valid input, boundary input, and invalid input? 3. Write tests for the happy path first, then edge cases, then error cases 4. Use descriptive test names that explain the expected behavior (e.g., "rejects empty input with a clear error") 5. Keep test setup minimal - only include what is relevant to the behavior under test 6. Use the project's existing test framework and conventions ## Test Structure Follow the arrange-act-assert pattern: - **Arrange**: Set up inputs and expected state with minimal fixtures …
Read the whole file at its exact version.
How to install
mdr add byronxlg/skillfold/testing@sha256:cd99a17f8de71855The line at the top of this page pins the label git:20260320.3db1caf, 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_j7ytkiwhe4qwuvwz)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 20, 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 (1990 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
byronxlg/skillfold · 15 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_j7ytkiwhe4qwuvwz GET https://markdownregistry.com/api/v1/resolve?ref=byronxlg/skillfold/testing GET https://markdownregistry.com/api/v1/blob/cd99a17f8de71855e98c848135f6b3db1b6260648d203cd0a07e0417ec5e1793
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 byronxlg/skillfold
Every file in byronxlg/skillfold