writing-tests SKILL.md skillA
writing-tests from cristhianzl/claude-skills-czl is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cristhianzl/claude-skills-czl/writing-tests@git:20261103.b450fa3Pins git:20261103.b450fa3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cristhianzl/claude-skills-czl
- Path
configs/agnostic/skills/writing-tests/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261103.b450fa3, committed Nov 3, 2026
- First version recorded
- Jun 19, 2026
- Size
- 15,767 bytes
- Repository stars
- 5
- License
- MIT
Write unit, integration, and E2E tests that follow the testing pyramid, the Arrange-Act-Assert pattern, the should_X_when_Y naming convention, and meet a 75% (target 80%) branch coverage gate per supported OS. Use when the user asks to write tests, add coverage, build a test suite, fix flaky tests, or verify a feature with tests. For TDD bug fixes use fixing-bugs; for TDD feature work use developing-features-tdd.
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
# Writing Tests Test code is production code. Same quality bar — naming, structure, immutability, file structure, security. The point of the test suite is to **find bugs**, not to confirm what the code already does. ## Read first (always) List `learnings/` and read every file relevant to the current task. Project-specific test framework choices, fixture conventions, flaky-test hotspots, or coverage carve-outs live there and override the defaults in this SKILL.md. If a learning conflicts with this file, **the learning wins** — mention it to the user. ## Tradeoff — when to apply, when to lighten up Apply the full discipline (pyramid, AAA, coverage gate, multi-platform matrix) for **production code**. Lighten the formality for one-off scripts, exploration, or examples under 30 lines — but even then, at least one happy-path test and one adversarial test. ## Pre-test analysis (mandatory) Before writing a single test: 1. **Identify the test framework.** Look for `pytest.ini` / `jest.config.*` / `vitest.config.*` / `*_test.go` / `build.gradle` test deps / `*.Tests.csproj` / `Cargo.toml [dev-dependencies]`. Use the framework already in the project. Do NOT introduce a new one. …
Read the whole file at its exact version.
How to install
mdr add cristhianzl/claude-skills-czl/writing-tests@sha256:ce948f64d591a529The line at the top of this page pins the label git:20261103.b450fa3, 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_d7mepbwy2scxb2tx)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 19, 2026 and Nov 3, 2026, about one every 137 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261103.b450fa3 latest | 2026-11-03 | b450fa3 | 15,767 B | A | view · diff |
| git:20260619.c43368b | 2026-06-19 | c43368b | 15,212 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 (15767 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
cristhianzl/claude-skills-czl · 5 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_d7mepbwy2scxb2tx GET https://markdownregistry.com/api/v1/resolve?ref=cristhianzl/claude-skills-czl/writing-tests GET https://markdownregistry.com/api/v1/blob/ce948f64d591a52941574c31bca28ae93466d799dea0e03daf09c6f8522864a1
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.
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