useful-tests SKILL.md skillA
useful-tests from tjcages/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tjcages/skills/useful-tests@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tjcages/skills
- Path
useful-tests/skills/useful-tests/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Sep 19, 2026
- Size
- 2,742 bytes
- Repository stars
- 6
- License
- none declared
Keep automated testing proportional to concrete risk and maintenance cost. Use when deciding whether to add tests for a feature, bug fix, or refactor, or when asked to reduce unnecessary testing.
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
# Useful tests Use the judgment of a pragmatic human maintainer: add tests only when their expected benefit outweighs their implementation, runtime, and maintenance cost. Zero new tests is a valid outcome. Do not create tests automatically for every change. - Add or update a test when explicitly required by the user or applicable project instructions, or when it protects a concrete, meaningful risk: nontrivial business logic, a likely recurring bug, security or permissions, data integrity, or a critical integration boundary. A bug fix does not automatically require a new regression test; it must earn its cost. - Before adding a test, identify the realistic failure it would catch and why existing coverage or a simpler check is insufficient. If there is no clear answer, skip it. Do not add tests just to increase coverage, test counts, or make the task look complete. …
Read the whole file at its exact version.
How to install
mdr add tjcages/skills/useful-tests@sha256:0b0ae9263bee08b3The line at the top of this page pins the label v0.1.0, 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_tih4nde5roghakem)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 19, 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 (2742 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
tjcages/skills · 6 stars · license none declared · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tih4nde5roghakem GET https://markdownregistry.com/api/v1/resolve?ref=tjcages/skills/useful-tests GET https://markdownregistry.com/api/v1/blob/0b0ae9263bee08b308ea5f9f998717d5c9e592eda122f49fe04ee2e2afd7ab10
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.