Fs Fixture
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Test Data Builder - Auto-activating skill for Test Automation.
Install Test Data Builder
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace test-data-builder --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .claude/skills/test-data-builder && 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 "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .claude/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builderType 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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace test-data-builder --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .agents/skills/test-data-builder && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .agents/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace test-data-builder --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .cursor/skills/test-data-builder && 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 "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .cursor/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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/jeremylongshore/tons-of-skills-marketplace.git --path skills/09-test-automation/test-data-builder--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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace test-data-builder --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .gemini/skills/test-data-builder && 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 "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .gemini/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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 jeremylongshore/tons-of-skills-marketplace test-data-builderInstalls 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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .github/skills/test-data-builder && 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 "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .github/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace test-data-builder --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/09-test-automation/test-data-builder .opencode/skills/test-data-builder && 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 "test-data-builder" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/09-test-automation/test-data-builder into .opencode/skills/test-data-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-data-builder", 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
test-data-builder- GitHub stars
- 2.8k
- Token cost
- ~543 tokens
- SKILL.md length
- 196 words
- Files
- 1
- Skills in repo
- 3,342
- Repo updated
- First seen
- Licence
- MIT
At a glance
Test Data Builder - Auto-activating skill for Test Automation.
- Works in 4 steps: Provides step-by-step guidance for test… → Follows industry best practices and… → Generates production-ready code and… → …
- : test data builder
- SKILL.md covers Overview, When to Use, Instructions and Examples, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Test Data Builder is an agent skill from jeremylongshore/tons-of-skills-marketplace. Test Data Builder - Auto-activating skill for Test Automation. Triggers on: test data builder, test data builder Part of the Test Automation skill category. Use when writing or running tests. Trigger with phrases like "test data builder", "test builder", "test".
Its SKILL.md is about 540 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code
It sits in Testing & QA, covering Test data and fixtures. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.
When your agent uses it
- : test data builder
- Test data builder Part of the Test Automation skill category
- With phrases like test data builder
Example prompts
- “test data builder”
- “test builder”
- “/test-data-builder”
Requirements
- Compatibility (from SKILL.md): Designed for Claude Code
- Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(cmd:*), Grep
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Provides step-by-step guidance for test data builder
- Follows industry best practices and patterns
- Generates production-ready code and configurations
- Validates outputs against common standards
What it can do on your machine
Read from SKILL.md and the folder at commit 80f86df. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditBash(cmd:*)Grep
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.
Compatibility
Designed for Claude Code
From compatibility in the SKILL.md frontmatter.
Context cost
Test Data Builder loads about 543 tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 196 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 jeremylongshore/tons-of-skills-marketplace at commit 80f86df, republished under its MIT licence (© jeremylongshore). 196 words, ~543 tokens.
Download SKILL.mdSave it as
.claude/skills/test-data-builder/SKILL.md (or your agent's skills folder).- name
- test-data-builder
- description
- Test Data Builder - Auto-activating skill for Test Automation. Triggers on: test data builder, test data builder Part of the Test Automation skill category. Use when writing or running tests. Trigger with phrases like "test data builder", "test builder", "test".
- allowed-tools
- Read, Write, Edit, Bash(cmd:*), Grep
- compatibility
- Designed for Claude Code
- version
- 1.0.0
- license
- MIT
- author
- Jeremy Longshore <jeremy@intentsolutions.io>
- tags
- testing, automation
Test Data Builder
Overview
This skill provides automated assistance for test data builder tasks within the Test Automation domain.
When to Use
This skill activates automatically when you:
- Mention "test data builder" in your request
- Ask about test data builder patterns or best practices
- Need help with test automation skills covering unit testing, integration testing, mocking, and test framework configuration.
Instructions
- Provides step-by-step guidance for test data builder
- Follows industry best practices and patterns
- Generates production-ready code and configurations
- Validates outputs against common standards
Examples
Example: Basic Usage Request: "Help me with test data builder" Result: Provides step-by-step guidance and generates appropriate configurations
Prerequisites
- Relevant development environment configured
- Access to necessary tools and services
- Basic understanding of test automation concepts
Output
- Generated configurations and code
- Best practice recommendations
- Validation results
Error Handling
| Error | Cause | Solution |
|---|---|---|
| Configuration invalid | Missing required fields | Check documentation for required parameters |
| Tool not found | Dependency not installed | Install required tools per prerequisites |
| Permission denied | Insufficient access | Verify credentials and permissions |
Resources
- Official documentation for related tools
- Best practices guides
- Community examples and tutorials
Related Skills
Part of the Test Automation skill category. Tags: testing, jest, pytest, mocking, tdd
© jeremylongshore, 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 skills/09-test-automation/test-data-builder of jeremylongshore/tons-of-skills-marketplace.
Open the folder on GitHubat commit 80f86df
Compare with similar skills
Test Data Builder 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 |
|---|---|---|---|---|---|---|
| Test Data Builder this skilljeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~543 | Automated safety check: Pass | MIT | |
| Fs Fixtureprivatenumber/fs-fixture | 100 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Dev Tenant APInightscout/nocturne | 139 | — | ~1.4k | Automated safety check: Pass | None | |
| Rsibench Data Factoryevolvent-ai/RSIBench-Data | 171 | — | ~640 | Automated safety check: Notes | None | |
| Eval Designagentscope-ai/OpenJudge | 870 | — | ~2.8k | Automated safety check: Warn | Apache-2.0 | |
| Data GenerationRed-Hat-AI-Innovation-Team/sdg_hub | 164 | — | ~381 | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Test Data Builder
What does Test Data Builder do?
Test Data Builder - Auto-activating skill for Test Automation. Test Data Builder is an agent skill from jeremylongshore/tons-of-skills-marketplace. Test Data Builder - Auto-activating skill for Test Automation.
When should I use Test Data Builder?
Test Data Builder fits situations like: : test data builder; test data builder Part of the Test Automation skill category; with phrases like test data builder.
How do I install Test Data Builder in Claude Code?
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a claude-code`. Or copy the skill folder (skills/09-test-automation/test-data-builder in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/test-data-builder in your project. Claude Code loads it when a task matches its description.
How do I install Test Data Builder in Codex?
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a codex`. Or copy the skill folder (skills/09-test-automation/test-data-builder in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/test-data-builder in your project. Codex loads it when a task matches its description.
Can I use Test Data Builder 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 jeremylongshore/tons-of-skills-marketplace --skill test-data-builder -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-data-builder, .gemini/skills/test-data-builder, .github/skills/test-data-builder and .opencode/skills/test-data-builder in your project.
What does Test Data Builder need to run?
SKILL.md names no scripts, command-line tools or credentials: Test Data Builder is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(cmd:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.
Does Test Data Builder 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 Test Data Builder 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 Test Data Builder use?
Test Data Builder is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Test Data Builder use?
About 543 tokens (SKILL.md is roughly 2.2k 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 Test Data Builder?
Skills that share tags, products or a category with Test Data Builder: Fs Fixture (privatenumber/fs-fixture, 100 stars), Dev Tenant API (nightscout/nocturne, 139 stars), Rsibench Data Factory (evolvent-ai/RSIBench-Data, 171 stars) and Eval Design (agentscope-ai/OpenJudge, 870 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Test Data Builder?
jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,825 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 9, 2026.
Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.