Skills

testing-anti-patterns

testing-anti-patterns is a skill in rohitg00/skillkit, last changed 6 Mar 2026. It is instructions only: no scripts, no named hosts and no pre-approved tools. Our pattern check flagged nothing at commit d2e5c34 on 27 Oct 2026.

Pattern check: nothing flagged · commit d2e5c34 · 27 Oct 2026

Install
From the author
Reviews test code to identify and fix common testing anti-patterns including flaky tests, over-mocking, brittle assertions, test interdependency, and hidden test logic. Flags bad patterns, explains the specific defect, and provides corrected implementations. Use when reviewing test code, debugging intermittent or unreliable test failures, or when the user mentions flaky tests, test smells, brittle tests, test isolation issues, mock overuse, slow tests, or test maintenance problems.
Licence
Apache 2.0
Repo stars
1.6k
Folder last changed
6 Mar 2026 (opens in a new tab)
Publisher
rohitg00
Files
1 file
Checked
d2e5c34 (opens in a new tab) · 27 Oct 2026

Install

Each tab says whether it installs commit d2e5c34, the one we checked, or the latest version.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity, and Claude Code for Cline. Kiro needs the folder copied by hand.

Pinned to commit d2e5c34, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/rohitg00/skillkit.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin d2e5c346f73325c326820efd3188dcf2b6eb704f &&
  git -C "$tmp" sparse-checkout set -- packages/core/src/methodology/packs/testing/anti-patterns &&
  git -C "$tmp" checkout -q d2e5c346f73325c326820efd3188dcf2b6eb704f &&
  mkdir -p .claude/skills &&
  mkdir .claude/skills/testing-anti-patterns &&
  cp -R "$tmp"/packages/core/src/methodology/packs/testing/anti-patterns/. .claude/skills/testing-anti-patterns/ &&
  rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Claude Code docs (opens in a new tab)

What it can touch

From the files and frontmatter at commit d2e5c34. This is how much a skill can do, not whether it is risky.

What it can touch: Instructions only

It is instructions only: no scripts, no named hosts and no pre-approved tools.

Pattern check

Pattern check: nothing flagged · commit d2e5c34 · 27 Oct 2026

We checked every text file in this skill, at commit d2e5c34 on 27 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check worksReport an incorrect finding

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

  • Agent Skills specFails

    The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.

    • Error

      The name "testing-anti-patterns" doesn't match its folder "anti-patterns". The spec requires them to match. N4

      Fix: Set name: anti-patterns, or rename the folder to testing-anti-patterns.

    • Warning

      Fields outside the spec: version, triggers, tags, difficulty, estimatedTime and relatedSkills. Uploads to the Claude apps and API, and the spec's validator, reject the file; most agents ignore these fields. O1

      Fix: Delete them for a portable skill, or keep them if you only target the agents that read them.

    • Note

      There is no license field, so readers can't tell whether they may reuse the skill. O2

      Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.

  • Claude CodePasses

    Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.

    • Note

      The name "testing-anti-patterns" doesn't match its folder "anti-patterns". Claude Code shows the skill as /testing-anti-patterns, and the folder name also invokes it. N4

      Fix: Set name: anti-patterns, or rename the folder to testing-anti-patterns.

    • Note

      Claude Code ignores fields it doesn't know: version, triggers, tags, difficulty, estimatedTime and relatedSkills. O1

      Fix: Check the spelling against Claude Code's field list, or delete them.

  • Claude apps & API uploadFails

    Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.

    • Error

      The name "testing-anti-patterns" doesn't match its folder "anti-patterns". claude.ai refuses an upload whose folder name doesn't match the skill name. N4

      Fix: Set name: anti-patterns, or rename the folder to testing-anti-patterns.

    • Error

      Upload and packaging fail on fields outside the spec: version, triggers, tags, difficulty, estimatedTime and relatedSkills. O1

      Fix: Delete them, and keep your own data under metadata as text values.

    • Note

      The description is 486 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4

      Fix: If the claude.ai upload refuses it, trim the description to 200 characters.

  • OpenAI (Codex & API)Passes with warnings

    Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.

    • Warning

      The name "testing-anti-patterns" doesn't match its folder "anti-patterns". OpenAI's own upload example uses a differently named folder, but the spec it follows says they must match. N4

      Fix: Set name: anti-patterns, or rename the folder to testing-anti-patterns.

    • Warning

      Fields outside the spec: version, triggers, tags, difficulty, estimatedTime and relatedSkills. Codex ignores them; OpenAI doesn't say whether its upload accepts them. O1

      Fix: Delete them, or move your own data under metadata as text values.

  • VS Code & CopilotPasses with warnings

    VS Code reads skills one folder below .github/skills, .claude/skills or .agents/skills and falls back to the folder name when the name is missing or differs; GitHub's Copilot docs require the exact name SKILL.md.

    • Warning

      The name "testing-anti-patterns" doesn't match its folder "anti-patterns". VS Code uses the folder name, anti-patterns, instead. N4

      Fix: Set name: anti-patterns, or rename the folder to testing-anti-patterns.

    • Note

      VS Code ignores fields it doesn't support: version, triggers, tags, difficulty, estimatedTime and relatedSkills. O1

      Fix: Delete them unless another agent you target reads them.

SKILL.md

Files

1 file

PathSize
SKILL.md (opens in a new tab)8 KB

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