MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills.
MITAuto-check passed
Install Dev Kit
$ npx skills add danieljvdm/effect-cf --skill dev-kit -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install danieljvdm/effect-cf dev-kit --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/danieljvdm/effect-cf.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/dev-kit .claude/skills/dev-kit && 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 "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .claude/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kitType 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 danieljvdm/effect-cf --skill dev-kit -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install danieljvdm/effect-cf dev-kit --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/dev-kit .agents/skills/dev-kit && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .agents/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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 danieljvdm/effect-cf --skill dev-kit -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install danieljvdm/effect-cf dev-kit --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/dev-kit .cursor/skills/dev-kit && 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 "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .cursor/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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/danieljvdm/effect-cf.git --path .agents/skills/dev-kit--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 danieljvdm/effect-cf --skill dev-kit -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install danieljvdm/effect-cf dev-kit --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/dev-kit .gemini/skills/dev-kit && 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 "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .gemini/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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 danieljvdm/effect-cf dev-kitInstalls 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 danieljvdm/effect-cf --skill dev-kit -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/dev-kit .github/skills/dev-kit && 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 "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .github/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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 danieljvdm/effect-cf --skill dev-kit -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install danieljvdm/effect-cf dev-kit --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/dev-kit .opencode/skills/dev-kit && 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 "dev-kit" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/dev-kit into .opencode/skills/dev-kit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dev-kit", 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
dev-kit- GitHub stars
- 111
- Used in
- 1 other repo
- Token cost
- ~352 tokens
- SKILL.md length
- 145 words
- Files
- 8 (incl. references)
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills.
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Dev Kit is an agent skill from danieljvdm/effect-cf. Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills.
Its SKILL.md is about 350 tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files (for example `.dev-kit-origin.json`, `agents/openai.yaml` and `references/cloudflare-worker-api.md`).
It works with TypeScript. The repository describes itself as: Effect-native primitives for Cloudflare Workers and bindings. The licence is MIT.
Example prompts
- “/dev-kit”
What it can do on your machine
Read from SKILL.md and the folder at commit 0877e66. 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
Dev Kit loads about 352 tokens when it runs, and up to ~2.9k if it reads all its reference files. Until then it costs about 32 tokens; SKILL.md has 145 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 danieljvdm/effect-cf at commit 0877e66, republished under its MIT licence (© danieljvdm). 145 words, ~352 tokens.
Download SKILL.mdSave it as
.claude/skills/dev-kit/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- dev-kit
- description
- Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills.
Dev Kit
Build from the user's requirements and leave outputs under normal repository ownership. Use the transient CLI for catalog and migration mechanics; inspect the existing repository before changing its architecture or configuration.
Read only the references for the requested work:
- Scaffold or reorganize a repository: repository setup.
- Adopt the Dev Kit default or Vite+ foundation: TypeScript defaults.
- Add or configure a Cloudflare Worker API: Worker API.
- Remove legacy Dev Kit manifests or managed configuration: legacy ejection.
- Discover, add, update, fork, or detach skills: skills.
Preserve repository conventions and existing authorization. Explain material architecture or dependency choices when they affect the outcome; infer routine placement and naming from the project. Follow installed API documentation and the repository's command authority, including its Effect and testing policies.
Verify the changed entrypoints with the normal project commands. Generated repositories keep no Dev Kit runtime dependency or lifecycle manager.
© danieljvdm, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 7 other files (references) in .agents/skills/dev-kit of danieljvdm/effect-cf.
- SKILL.md
- .dev-kit-origin.json
- agents/openai.yaml
- references/cloudflare-worker-api.md
- references/default-typescript-repository.md
- references/legacy-eject.md
- references/repository-setup.md
- references/skills.md
Open the folder on GitHubat commit 0877e66
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 danieljvdm/effect-cf, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Dev Kit 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 |
|---|---|---|---|---|---|---|
| Dev Kit this skilldanieljvdm/effect-cf | 111 | 1 repos | ~352 | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 62 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Builderanthropics/skills | 180k | 40 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 24 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 5 repos | ~1.2k | Automated safety check: Pass | MIT |
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- Official
- Official
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Typescript Advanced Types
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Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
Code Review Checklist
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Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
MCP Server Builder
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Walks through building MCP servers in Python or TypeScript that expose tools, resources and prompts to Claude, with templates, registration and testing.
Nx Import
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Import, merge, or combine repositories into an Nx workspace using nx import.
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Use before creating or updating PRs, choosing PR titles, writing PR bodies, or adding changesets for this repository.
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Open Pull Request
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Prepare, open, update, or land pull requests with concise explanations and relevant review evidence.
Testing
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Related
Works with
Questions about Dev Kit
What does Dev Kit do?
Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills. Dev Kit is an agent skill from danieljvdm/effect-cf. Set up TypeScript repositories, change project tooling, migrate legacy Dev Kit management, or maintain repository skills.
How do I install Dev Kit in Claude Code?
Run `npx skills add danieljvdm/effect-cf --skill dev-kit -a claude-code`. Or copy the skill folder (.agents/skills/dev-kit in danieljvdm/effect-cf) into .claude/skills/dev-kit in your project. Claude Code loads it when a task matches its description.
How do I install Dev Kit in Codex?
Run `npx skills add danieljvdm/effect-cf --skill dev-kit -a codex`. Or copy the skill folder (.agents/skills/dev-kit in danieljvdm/effect-cf) into .agents/skills/dev-kit in your project. Codex loads it when a task matches its description.
Can I use Dev Kit 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 danieljvdm/effect-cf --skill dev-kit -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dev-kit, .gemini/skills/dev-kit, .github/skills/dev-kit and .opencode/skills/dev-kit in your project.
What does Dev Kit need to run?
SKILL.md names no scripts, command-line tools or credentials: Dev Kit is instructions for the agent only.
Does Dev Kit 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 Dev Kit 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 Dev Kit use?
Dev Kit 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 Dev Kit use?
About 352 tokens (SKILL.md is roughly 1.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.5k tokens, read only when the agent opens those files.
What are the alternatives to Dev Kit?
Skills that share tags, products or a category with Dev Kit: MCP Server Builder (anthropics/skills, 180k stars), Web Artifacts Builder (anthropics/skills, 180k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Dev Kit?
danieljvdm (a GitHub user) maintains it in danieljvdm/effect-cf, which has 111 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 4, 2026.
Source: danieljvdm/effect-cf on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.