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.
Work with Effect v4 / effect-smol TypeScript code in this repo
MITAuto-check passed
Install Effect
$ npx skills add shobcoder/shob --skill effect -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install shobcoder/shob effect --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/shobcoder/shob.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.shob/skills/effect .claude/skills/effect && 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 "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .claude/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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/shobcoder/shob/tree/main/.shob/skills/effectType 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 shobcoder/shob --skill effect -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install shobcoder/shob effect --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/shobcoder/shob.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.shob/skills/effect .agents/skills/effect && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .agents/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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 shobcoder/shob --skill effect -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install shobcoder/shob effect --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/shobcoder/shob.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.shob/skills/effect .cursor/skills/effect && 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 "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .cursor/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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/shobcoder/shob.git --path .shob/skills/effect--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 shobcoder/shob --skill effect -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install shobcoder/shob effect --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/shobcoder/shob.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.shob/skills/effect .gemini/skills/effect && 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 "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .gemini/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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 shobcoder/shob effectInstalls 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 shobcoder/shob --skill effect -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/shobcoder/shob.git skills-src && mkdir -p .github/skills && cp -r skills-src/.shob/skills/effect .github/skills/effect && 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 "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .github/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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 shobcoder/shob --skill effect -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install shobcoder/shob effect --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/shobcoder/shob.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.shob/skills/effect .opencode/skills/effect && 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 "effect" agent skill from https://github.com/shobcoder/shob/tree/main/.shob/skills/effect into .opencode/skills/effect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect", 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
effect- GitHub stars
- 577
- Used in
- 5 other repos
- Token cost
- ~694 tokens
- SKILL.md length
- 354 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Work with Effect v4 / effect-smol TypeScript code in this repo
- Works in 4 steps: If .shob/references/effect-smol is… → Search .shob/references/effect-smol for… → Also inspect existing repo code for… → …
- SKILL.md covers Source Of Truth, Guidelines and Testing Patterns
- Reaches github.com
What it does
Effect is an agent skill from shobcoder/shob. Work with Effect v4 / effect-smol TypeScript code in this repo
Its SKILL.md is about 690 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with TypeScript. The repository describes itself as: Shob – an AI agent that delivers high-quality coding & automation work. The licence is MIT.
Example prompts
- “/effect”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- If .shob/references/effect-smol is missing, clone https://github.com/Effect-TS/effect-smol there. Do this in the project, not in the skill…
- Search .shob/references/effect-smol for exact APIs, examples, tests, and naming patterns before answering or implementing Effect-specific…
- Also inspect existing repo code for local house style before introducing new patterns.
- Prefer answers and implementations backed by specific source files or nearby repo examples.
What it can do on your machine
Read from SKILL.md and the folder at commit 14831ba. 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
Hosts in commands or code, which the agent is likely to contact:
github.com
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
Effect loads about 694 tokens when it runs. Until then it costs about 17 tokens; SKILL.md has 354 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 shobcoder/shob at commit 14831ba, republished under its MIT licence (© shobcoder). 354 words, ~694 tokens.
Download SKILL.mdSave it as
.claude/skills/effect/SKILL.md (or your agent's skills folder).- name
- effect
- description
- Work with Effect v4 / effect-smol TypeScript code in this repo
Effect
This codebase uses Effect for typed, composable TypeScript services, schemas, and workflows.
Source Of Truth
Use the current Effect v4 / effect-smol source, not memory or older Effect v2/v3 examples.
- If
.shob/references/effect-smolis missing, clonehttps://github.com/Effect-TS/effect-smolthere. Do this in the project, not in the skill folder. - Search
.shob/references/effect-smolfor exact APIs, examples, tests, and naming patterns before answering or implementing Effect-specific code. - Also inspect existing repo code for local house style before introducing new patterns.
- Prefer answers and implementations backed by specific source files or nearby repo examples.
Guidelines
- Prefer current Effect v4 APIs and project-local patterns over old blog posts, examples, or package-memory guesses.
- Use
Effect.gen(function* () { ... })for multi-step workflows. - Use
Effect.fn("Name")orEffect.fnUntraced(...)for named effects when adding reusable service methods or important workflows. - Prefer Effect
Schemafor API and domain data shapes. Use branded schemas for IDs andSchema.TaggedErrorClassfor typed domain errors when modeling new error surfaces. - Keep HTTP handlers thin: decode input, read request context, call services, and map transport errors. Put business rules in services.
- In Effect service code, prefer Effect-aware platform abstractions and dependencies over ad hoc promises where the surrounding code already does so.
- Keep layer composition explicit. Avoid broad hidden provisioning that makes missing dependencies hard to see.
- In tests, prefer the repo's existing Effect test helpers and live tests for filesystem, git, child process, locks, or timing behavior.
- Do not introduce
any, non-null assertions, unchecked casts, or older Effect APIs just to satisfy types. - Do not answer from memory. Verify against
.shob/references/effect-smolor nearby code first.
Show full SKILL.md (94 more words)Show less
Testing Patterns
- Use
testEffect(...)frompackages/shob/test/lib/effect.tsfor tests that exercise Effect services, layers, runtime context, scoped resources, or platform integrations. - Use
it.live(...)for filesystem, git repositories, HTTP servers, sockets, child processes, locks, real time, and other live platform behavior. - Run tests from package directories such as
packages/shob; never run package tests from the repo root. - Prefer explicit test layers over ad hoc managed runtimes. Keep dependency provisioning visible in the test file.
- Use scoped fixtures and finalizers for resources that must be cleaned up, including temporary directories, flags, databases, fibers, servers, and global state.
© shobcoder, 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 .shob/skills/effect of shobcoder/shob.
Open the folder on GitHubat commit 14831ba
Used in 5 other repositories
We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in shobcoder/shob, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Effect 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 |
|---|---|---|---|---|---|---|
| Effect this skillshobcoder/shob | 577 | 5 repos | ~694 | 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 |
Similar skills
- Official
- Official
Web Artifacts Builder
anthropics/skills
Builds multi-component claude.ai HTML artifacts as a small React, TypeScript and Tailwind project, then bundles it into one shareable HTML file.
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.
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.
MCP Server Builder
shareAI-lab/learn-claude-code
Walks through building MCP servers in Python or TypeScript that expose tools, resources and prompts to Claude, with templates, registration and testing.
Nx Import
nrwl/nx
Import, merge, or combine repositories into an Nx workspace using nx import.
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Works with
Questions about Effect
What does Effect do?
Work with Effect v4 / effect-smol TypeScript code in this repo. Effect is an agent skill from shobcoder/shob.
How do I install Effect in Claude Code?
Run `npx skills add shobcoder/shob --skill effect -a claude-code`. Or copy the skill folder (.shob/skills/effect in shobcoder/shob) into .claude/skills/effect in your project. Claude Code loads it when a task matches its description.
How do I install Effect in Codex?
Run `npx skills add shobcoder/shob --skill effect -a codex`. Or copy the skill folder (.shob/skills/effect in shobcoder/shob) into .agents/skills/effect in your project. Codex loads it when a task matches its description.
Can I use Effect 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 shobcoder/shob --skill effect -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/effect, .gemini/skills/effect, .github/skills/effect and .opencode/skills/effect in your project.
What does Effect need to run?
SKILL.md names no scripts, command-line tools or credentials: Effect is instructions for the agent only.
Does Effect access the network?
SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Effect 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 Effect use?
Effect 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 Effect use?
About 694 tokens (SKILL.md is roughly 2.8k 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 Effect?
Skills that share tags, products or a category with Effect: 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 Effect?
shobcoder (a GitHub organization) maintains it in shobcoder/shob, which has 577 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on September 18, 2026.
Source: shobcoder/shob on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.