TDD
pietheinstrengholt/rssmonster
Test-driven development. An agent skill from pietheinstrengholt/rssmonster.
Develop new features with test-first approach (TDD). An agent skill from undeadlist/claude-code-agents.
Install New Feature
$ npx skills add undeadlist/claude-code-agents --skill new-feature -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install undeadlist/claude-code-agents new-feature --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/undeadlist/claude-code-agents.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/new-feature .claude/skills/new-feature && 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 "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .claude/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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/undeadlist/claude-code-agents/tree/main/skills/new-featureType 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 undeadlist/claude-code-agents --skill new-feature -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install undeadlist/claude-code-agents new-feature --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/undeadlist/claude-code-agents.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/new-feature .agents/skills/new-feature && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .agents/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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 undeadlist/claude-code-agents --skill new-feature -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install undeadlist/claude-code-agents new-feature --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/undeadlist/claude-code-agents.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/new-feature .cursor/skills/new-feature && 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 "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .cursor/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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/undeadlist/claude-code-agents.git --path skills/new-feature--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 undeadlist/claude-code-agents --skill new-feature -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install undeadlist/claude-code-agents new-feature --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/undeadlist/claude-code-agents.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/new-feature .gemini/skills/new-feature && 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 "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .gemini/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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 undeadlist/claude-code-agents new-featureInstalls 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 undeadlist/claude-code-agents --skill new-feature -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/undeadlist/claude-code-agents.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/new-feature .github/skills/new-feature && 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 "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .github/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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 undeadlist/claude-code-agents --skill new-feature -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install undeadlist/claude-code-agents new-feature --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/undeadlist/claude-code-agents.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/new-feature .opencode/skills/new-feature && 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 "new-feature" agent skill from https://github.com/undeadlist/claude-code-agents/tree/main/skills/new-feature into .opencode/skills/new-feature/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-feature", 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
new-feature- GitHub stars
- 149
- Token cost
- ~295 tokens
- SKILL.md length
- 114 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Develop new features with test-first approach (TDD). An agent skill from undeadlist/claude-code-agents.
- Works in 4 steps: Write Tests → Implement Feature → Verify → …
- Tasks that involve Test-driven development
- SKILL.md covers Execution (Sequential), Usage and Skip browser-qa for
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
New Feature is an agent skill from undeadlist/claude-code-agents. Develop new features with test-first approach (TDD)
Its SKILL.md is about 300 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Testing & QA, covering Test-driven development. The repository describes itself as: Claude Code Agents Prompt templates for Claude Code's subagent system. Run parallel code audits, automate fix cycles, get stuff reviewed. Built for the Claude Code Task tool. Not… The licence is MIT.
When your agent uses it
- Tasks that involve Test-driven development
Example prompts
- “/new-feature”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 13e3d51. 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
New Feature loads about 295 tokens when it runs. Until then it costs about 16 tokens; SKILL.md has 114 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 undeadlist/claude-code-agents at commit 13e3d51, republished under its MIT licence (© undeadlist). 114 words, ~295 tokens.
Download SKILL.mdSave it as
.claude/skills/new-feature/SKILL.md (or your agent's skills folder).- name
- new-feature
- description
- Develop new features with test-first approach (TDD)
New Feature Workflow
Build features using test-driven development. Provide the feature specification when invoking.
Execution (Sequential)
Step 1: Write Tests
Spawn test-writer with the feature requirements:
- Analyze feature specification
- Write failing tests first
- Cover happy path + edge cases
Step 2: Implement Feature
Spawn code-fixer with the feature requirements and test files:
- Implement feature following existing patterns
- Make all new tests pass
Step 3: Verify
Spawn test-runner:
- Run all tests (new + existing)
- Verify no regressions
Step 4: Browser QA (if UI feature)
Spawn browser-qa-agent:
- Navigate to the new feature
- Test interactions
- Check for console errors
Usage
Provide feature requirements when invoking:
/new-feature
Feature: User profile update endpoint
- PUT /api/users/:id
- Allow updating: name, email, avatar
- Require authentication
- Validate email format
- Return updated userSkip browser-qa for
- Pure API features (no UI)
- Library/utility code
- Database migrations
- Background jobs
© undeadlist, 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/new-feature of undeadlist/claude-code-agents.
Open the folder on GitHubat commit 13e3d51
Compare with similar skills
New Feature 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 |
|---|---|---|---|---|---|---|
| New Feature this skillundeadlist/claude-code-agents | 149 | — | ~295 | Automated safety check: Pass | MIT | |
| TDDpietheinstrengholt/rssmonster | 564 | 30 repos | ~906 | Automated safety check: Pass | MIT | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| TDDsanity-io/sanity | 6.4k | 20 repos | ~1k | Automated safety check: Pass | MIT | |
| Test Driven Developmentfarm-fe/farm | 5.6k | 51 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Tapd Story PipelineTencentBlueKing/bk-bcs | 840 | — | ~2.6k | Automated safety check: Pass | Custom licence |
Similar skills
TDD Workflow
hellangleZ/burn-in-cceverywhere-ralph
A skill your agent uses when writing new features, fixing bugs, or refactoring code.
- Official
TDD
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Test-driven development with red-green-refactor loop. An agent skill from sanity-io/sanity.
Test Driven Development
farm-fe/farm
A skill your agent uses when implementing any feature or bugfix, before writing implementation code
Tapd Story Pipeline
TencentBlueKing/bk-bcs
单需求实现流水线——把一个 TAPD 需求从零推进到代码提交。自动串联技术澄清、 开发计划、任务拆分、TDD 实现、架构/安全校验、代码提交六个阶段。
Absolute Init
maddhruv/absolute
One-time setup for absolute: interview how you want it to behave (output style, autonomy, TDD strictness, spec dir, families) + detect the stack once, then write .absolute.config.json (project…
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Related
Categories
Questions about New Feature
What does New Feature do?
Develop new features with test-first approach (TDD). An agent skill from undeadlist/claude-code-agents. New Feature is an agent skill from undeadlist/claude-code-agents.
When should I use New Feature?
New Feature fits situations like: tasks that involve Test-driven development.
How do I install New Feature in Claude Code?
Run `npx skills add undeadlist/claude-code-agents --skill new-feature -a claude-code`. Or copy the skill folder (skills/new-feature in undeadlist/claude-code-agents) into .claude/skills/new-feature in your project. Claude Code loads it when a task matches its description.
How do I install New Feature in Codex?
Run `npx skills add undeadlist/claude-code-agents --skill new-feature -a codex`. Or copy the skill folder (skills/new-feature in undeadlist/claude-code-agents) into .agents/skills/new-feature in your project. Codex loads it when a task matches its description.
Can I use New Feature 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 undeadlist/claude-code-agents --skill new-feature -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/new-feature, .gemini/skills/new-feature, .github/skills/new-feature and .opencode/skills/new-feature in your project.
What does New Feature need to run?
SKILL.md names no scripts, command-line tools or credentials: New Feature is instructions for the agent only.
Does New Feature 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 New Feature 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 New Feature use?
New Feature 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 New Feature use?
About 295 tokens (SKILL.md is roughly 1.2k 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 New Feature?
Skills that share tags, products or a category with New Feature: TDD (pietheinstrengholt/rssmonster, 564 stars), TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), TDD (sanity-io/sanity, 6.4k stars) and Test Driven Development (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains New Feature?
undeadlist (a GitHub user) maintains it in undeadlist/claude-code-agents, which has 149 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on June 28, 2026.
Source: undeadlist/claude-code-agents on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.