Generate Tests
coco-research/coco
A skill your agent uses when asked to generate tests for a file, module or component, to raise coverage, or to bootstrap a suite for untested code.
A skill your agent uses when generating tests for backend code (Express routes, MongoDB models, Node services) - analyzes file type, detects test framework from package.json, generates comprehensive…
Install Backend Test Writer
$ npx skills add aiskillstore/marketplace --skill backend-test-writer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace backend-test-writer --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .claude/skills/backend-test-writer && 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 "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .claude/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writerType 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 aiskillstore/marketplace --skill backend-test-writer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace backend-test-writer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .agents/skills/backend-test-writer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .agents/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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 aiskillstore/marketplace --skill backend-test-writer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace backend-test-writer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .cursor/skills/backend-test-writer && 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 "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .cursor/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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/aiskillstore/marketplace.git --path skills/9tykeshav/backend-test-writer--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 aiskillstore/marketplace --skill backend-test-writer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace backend-test-writer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .gemini/skills/backend-test-writer && 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 "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .gemini/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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 aiskillstore/marketplace backend-test-writerInstalls 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 aiskillstore/marketplace --skill backend-test-writer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .github/skills/backend-test-writer && 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 "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .github/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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 aiskillstore/marketplace --skill backend-test-writer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace backend-test-writer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/9tykeshav/backend-test-writer .opencode/skills/backend-test-writer && 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 "backend-test-writer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/9tykeshav/backend-test-writer into .opencode/skills/backend-test-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "backend-test-writer", 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
backend-test-writer- GitHub stars
- 430
- Used in
- 1 other repo
- Token cost
- ~1.1k tokens
- SKILL.md length
- 403 words
- Files
- 4
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
A skill your agent uses when generating tests for backend code (Express routes, MongoDB models, Node services) - analyzes file type, detects test framework from package.json, generates comprehensive…
- Works in 4 steps: Infrastructure Check → Analyze Target Files → Generate Tests → …
- Generating tests for backend code (Express routes
- SKILL.md covers Workflow, Quick Reference, Test Structure Pattern and Checklists, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Backend Test Writer is an agent skill from aiskillstore/marketplace. Use when generating tests for backend code (Express routes, MongoDB models, Node services) - analyzes file type, detects test framework from package.json, generates comprehensive tests with setup/teardown and edge case coverage
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `reference/test-patterns.md`, `reference/test-setup.md` and `skill-report.json`).
It sits in Testing & QA, covering Test generation and NoSQL databases. It works with MongoDB, npm and Jest. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Generating tests for backend code (Express routes
- Node services) - analyzes file type
- Detects test framework from package.json
- Generates comprehensive tests with setup/teardown and edge case coverage
Example prompts
- “/backend-test-writer”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Infrastructure Check
- Analyze Target Files
- Generate Tests
- Report
What it can do on your machine
Read from SKILL.md and the folder at commit 755bc35. 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 (its code samples are javascript).
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
Backend Test Writer loads about 1.1k tokens when it runs. Until then it costs about 62 tokens; SKILL.md has 403 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 403 words (~1,131 tokens).
“Generate comprehensive backend tests for MERN stack code. Analyzes file type, detects project conventions, produces tests that actually run.”
- name
- backend-test-writer
Files
SKILL.md and 3 other files in skills/9tykeshav/backend-test-writer of aiskillstore/marketplace.
- SKILL.md
- reference/test-patterns.md
- reference/test-setup.md
- skill-report.json
Open the folder on GitHubat commit 755bc35
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Backend Test Writer 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 |
|---|---|---|---|---|---|---|
| Backend Test Writer this skillaiskillstore/marketplace | 430 | 1 repos | ~1.1k | Automated safety check: Pass | None | |
| Generate Testscoco-research/coco | 503 | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| MongoDB Source Connector E2E Harnessairbytehq/airbyte | 22k | — | ~1.9k | Automated safety check: Pass | Custom licence | |
| Write Testsgrafana/synthetic-monitoring-app | 171 | — | ~1.2k | Automated safety check: Pass | AGPL-3.0 | |
| Bungalfrevn/apollo | 237 | — | ~2k | Automated safety check: Notes | MIT | |
| Test ScopeGlitterKill/sdl-mcp | 491 | — | ~586 | Automated safety check: Pass | Custom licence |
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Categories
Questions about Backend Test Writer
What does Backend Test Writer do?
A skill your agent uses when generating tests for backend code (Express routes, MongoDB models, Node services) - analyzes file type, detects test framework from package.json, generates comprehensive…. Backend Test Writer is an agent skill from aiskillstore/marketplace.
When should I use Backend Test Writer?
Backend Test Writer fits situations like: generating tests for backend code (Express routes; Node services) - analyzes file type; detects test framework from package.json; generates comprehensive tests with setup/teardown and edge case coverage.
How do I install Backend Test Writer in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill backend-test-writer -a claude-code`. Or copy the skill folder (skills/9tykeshav/backend-test-writer in aiskillstore/marketplace) into .claude/skills/backend-test-writer in your project. Claude Code loads it when a task matches its description.
How do I install Backend Test Writer in Codex?
Run `npx skills add aiskillstore/marketplace --skill backend-test-writer -a codex`. Or copy the skill folder (skills/9tykeshav/backend-test-writer in aiskillstore/marketplace) into .agents/skills/backend-test-writer in your project. Codex loads it when a task matches its description.
Can I use Backend Test Writer 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 aiskillstore/marketplace --skill backend-test-writer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/backend-test-writer, .gemini/skills/backend-test-writer, .github/skills/backend-test-writer and .opencode/skills/backend-test-writer in your project.
What does Backend Test Writer need to run?
SKILL.md names no scripts, command-line tools or credentials: Backend Test Writer is instructions for the agent only.
Does Backend Test Writer 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 Backend Test Writer 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 Backend Test Writer use?
No licence was found for Backend Test Writer or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Backend Test Writer use?
About 1.1k tokens (SKILL.md is roughly 4.5k 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 Backend Test Writer?
Skills that share tags, products or a category with Backend Test Writer: Generate Tests (coco-research/coco, 503 stars), MongoDB Source Connector E2E Harness (airbytehq/airbyte, 22k stars), Write Tests (grafana/synthetic-monitoring-app, 171 stars) and Bun (galfrevn/apollo, 237 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Backend Test Writer?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 9, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.