Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
“Skill: testing”
Install Testing
$ npx skills add udecode/plate-playground-template --skill testing -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install udecode/plate-playground-template testing --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/testing .claude/skills/testing && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .claude/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add udecode/plate-playground-template --skill testing -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install udecode/plate-playground-template testing --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/testing .agents/skills/testing && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .agents/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add udecode/plate-playground-template --skill testing -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install udecode/plate-playground-template testing --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/testing .cursor/skills/testing && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .cursor/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/udecode/plate-playground-template.git --path .agents/skills/testing--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add udecode/plate-playground-template --skill testing -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install udecode/plate-playground-template testing --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/testing .gemini/skills/testing && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .gemini/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install udecode/plate-playground-template testingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add udecode/plate-playground-template --skill testing -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/testing .github/skills/testing && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .github/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add udecode/plate-playground-template --skill testing -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install udecode/plate-playground-template testing --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/udecode/plate-playground-template.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/testing .opencode/skills/testing && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "testing" agent skill from https://github.com/udecode/plate-playground-template/tree/main/.agents/skills/testing into .opencode/skills/testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "testing", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
testing- GitHub stars
- 241
- Token cost
- ~415 tokens
- SKILL.md length
- 222 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- MIT
At a glance
- SKILL.md covers Testing Goal, Core Rules, Seam Selection and Fixtures And Assertions, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
About this skill
Testing is a skill in udecode/plate-playground-template (241 stars). Its SKILL.md is about 415 tokens. Licence: MIT.
What it can do on your machine
Read from SKILL.md and the folder at commit 324070e. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Testing loads about 415 tokens when it runs. Until then it costs about 6 tokens; SKILL.md has 222 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from udecode/plate-playground-template at commit 324070e, republished under its MIT licence (© udecode). 222 words, ~415 tokens.
Download SKILL.mdSave it as
.claude/skills/testing/SKILL.md (or your agent's skills folder).- name
- testing
- description
- Skill: testing
Testing Goal
Keep tests in three buckets only:
- Pure unit tests for deterministic logic.
- Thin component or hook contract tests for real app behavior.
- Golden input or output tests when serialized output is the contract.
Hard constraints:
- Prefer Bun for the fast local loop.
- Keep the default suite fast.
- No browser or e2e coverage unless the app behavior truly needs it.
- Coverage is a hotspot tool, not a vanity score.
Core Rules
- Assert public behavior, not implementation detail.
- Keep tests next to the code they cover with
*.spec.ts[x]. - Keep helpers local. Do not import one spec from another.
- Prefer explicit assertions over snapshots.
- Delete skipped, commented, or placeholder tests instead of babysitting them.
Seam Selection
- Use plain function tests for pure logic.
- Use rendered React tests for hooks, components, rerender behavior, and DOM behavior.
- Use browser checks only when the contract is actually browser-specific.
Fixtures And Assertions
- Keep fixtures small.
- Use plain objects for simple state.
- Use
it.eachfor small behavior matrices. - In Bun + Testing Library, prefer render-returned queries over
screen. - Use direct style-property assertions instead of
toHaveStyle. - Use snapshots only when serialized output is the contract and inline assertions would be worse.
Quick Reference
- Keep tests fast and local.
- Start with the smallest seam that proves the behavior.
- Prefer explicit assertions.
- Browser checks are for real UI behavior, not lazy coverage.
© udecode, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/testing of udecode/plate-playground-template.
Open the folder on GitHubat commit 324070e
Compare with similar skills
Testing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Testing this skilludecode/plate-playground-template | 241 | — | ~415 | Automated safety check: Pass | MIT | |
| Vercel Composition Patternssupabase/supabase | 111k | 58 repos | ~726 | Automated safety check: Pass | MIT | |
| Finishing a Development Branchobra/superpowers | 297k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 25 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| PR Babysitteropeninterpreter/openinterpreter | 69k | 3 repos | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT |
Similar skills
- Official
Finishing a Development Branch
obra/superpowers
Walks the last step of a branch: confirm tests pass, detect the git environment, ask how to integrate, carry out your choice and clean up the worktree.
Typescript Advanced Types
rolling-scopes/rsschool-app
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
PR Babysitter
openinterpreter/openinterpreter
Watches an open GitHub pull request until it merges, handling review comments, diagnosing CI failures and retrying flaky checks along the way.
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
Greploop
onyx-dot-app/onyx
Iteratively improves a PR (GitHub), MR (GitLab), or shelved changelist (Perforce) until Greptile gives it a 5/5 confidence score with zero unresolved comments.
More from udecode/plate-playground-template
Autoreview
udecode/plate-playground-template
Structured code review when explicitly requested, preferring OpenAI/Codex before Claude.
Browser Debug Setup
udecode/plate-playground-template
One-time setup for a persistent debug browser on 127.0.0.1:9222 for dev-browser --connect.
Video Transcripts
udecode/plate-playground-template
Transcribe a supplied local or linked video with Gemini Files API when its contents are needed as evidence.
Related
Categories
Questions about Testing
How do I install Testing in Claude Code?
Run `npx skills add udecode/plate-playground-template --skill testing -a claude-code`. Or copy the skill folder (.agents/skills/testing in udecode/plate-playground-template) into .claude/skills/testing in your project. Claude Code loads it when a task matches its description.
How do I install Testing in Codex?
Run `npx skills add udecode/plate-playground-template --skill testing -a codex`. Or copy the skill folder (.agents/skills/testing in udecode/plate-playground-template) into .agents/skills/testing in your project. Codex loads it when a task matches its description.
Can I use Testing in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add udecode/plate-playground-template --skill testing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/testing, .gemini/skills/testing, .github/skills/testing and .opencode/skills/testing in your project.
What does Testing need to run?
SKILL.md names no scripts, command-line tools or credentials: Testing is instructions for the agent only.
Does Testing access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Testing safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Testing use?
Testing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Testing use?
About 415 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Testing?
Skills that share tags, products or a category with Testing: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Testing?
udecode (a GitHub organization) maintains it in udecode/plate-playground-template, which has 241 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 7, 2026.
Source: udecode/plate-playground-template on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.