Agents
butterbase-ai/butterbase-skills
A skill your agent uses when designing, deploying, or debugging a Butterbase Agent (declarative LLM/tool graph), registering an MCP server for tool use, or wiring access controls and rate limits.
Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic).
Install Building With Medusa
$ npx skills add medusajs/medusa-agent-skills --skill building-with-medusa -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install medusajs/medusa-agent-skills building-with-medusa --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/medusajs/medusa-agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .claude/skills/building-with-medusa && 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 "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .claude/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusaType 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 medusajs/medusa-agent-skills --skill building-with-medusa -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install medusajs/medusa-agent-skills building-with-medusa --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/medusajs/medusa-agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .agents/skills/building-with-medusa && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .agents/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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 medusajs/medusa-agent-skills --skill building-with-medusa -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install medusajs/medusa-agent-skills building-with-medusa --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/medusajs/medusa-agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .cursor/skills/building-with-medusa && 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 "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .cursor/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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/medusajs/medusa-agent-skills.git --path plugins/medusa-dev/skills/building-with-medusa--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 medusajs/medusa-agent-skills --skill building-with-medusa -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install medusajs/medusa-agent-skills building-with-medusa --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/medusajs/medusa-agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .gemini/skills/building-with-medusa && 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 "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .gemini/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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 medusajs/medusa-agent-skills building-with-medusaInstalls 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 medusajs/medusa-agent-skills --skill building-with-medusa -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/medusajs/medusa-agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .github/skills/building-with-medusa && 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 "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .github/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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 medusajs/medusa-agent-skills --skill building-with-medusa -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install medusajs/medusa-agent-skills building-with-medusa --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/medusajs/medusa-agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/medusa-dev/skills/building-with-medusa .opencode/skills/building-with-medusa && 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 "building-with-medusa" agent skill from https://github.com/medusajs/medusa-agent-skills/tree/main/plugins/medusa-dev/skills/building-with-medusa into .opencode/skills/building-with-medusa/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-with-medusa", 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
building-with-medusa- GitHub stars
- 228
- Token cost
- ~4.1k tokens
- SKILL.md length
- 1,564 words
- Files
- 14
- Skills in repo
- 16
- Repo updated
- First seen
- Licence
- None found
At a glance
Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic).
- Works in 10 steps: Architecture Violations (CRITICAL) → Type Safety (CRITICAL) → Business Logic Placement (HIGH) → …
- Tasks that involve MCP servers
- SKILL.md covers When to Apply, CRITICAL: Load Reference Files…, Critical Architecture Pattern and Rule Categories by Priority, plus 8 more sections
- Calls npm, curl and npx
What it does
Building With Medusa is an agent skill from medusajs/medusa-agent-skills. Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic). REQUIRED for all Medusa backend work in ALL modes (planning, implementation, exploration). Contains architectural patterns, best practices, and critical rules that MCP servers don't provide.
Its SKILL.md is about 4.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 14 other files (for example `reference/api-routes.md`, `reference/authentication.md` and `reference/custom-modules.md`).
It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol. The repository describes itself as: Agent skills and commands for Medusa best practices and conventions.
When your agent uses it
- Tasks that involve MCP servers
Example prompts
- “/building-with-medusa”
Requirements
- Node.js
Workflow steps
10 steps, taken from the step headings in SKILL.md.
- Architecture Violations (CRITICAL)
- Type Safety (CRITICAL)
- Business Logic Placement (HIGH)
- Import & Code Organization (HIGH)
- Data Access Patterns (MEDIUM)
- File Organization (MEDIUM)
- Start the Development Server
- Access the Admin Dashboard
- Test API Routes
- Additional Testing Steps
What it can do on your machine
Read from SKILL.md and the folder at commit 066132d. 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
Shell commands in SKILL.md call:
npmcurlnpx
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npm, curl and npx, which can reach the network depending on how they are called.
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
Building With Medusa loads about 4.1k tokens when it runs. Until then it costs about 97 tokens; SKILL.md has 1,564 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 1,564 words (~4,123 tokens).
“Comprehensive backend development guide for Medusa applications. Contains patterns across 6 categories covering architecture, type safety, business logic placement, and common pitfalls.”
- name
- building-with-medusa
Files
SKILL.md and 13 other files in plugins/medusa-dev/skills/building-with-medusa of medusajs/medusa-agent-skills.
- SKILL.md
- reference/api-routes.md
- reference/authentication.md
- reference/custom-modules.md
- reference/data-models.md
- reference/error-handling.md
- reference/frontend-integration.md
- reference/module-links.md
- reference/querying-data.md
- reference/scheduled-jobs.md
- reference/subscribers-and-events.md
- reference/troubleshooting.md
- reference/workflow-hooks.md
- reference/workflows.md
Open the folder on GitHubat commit 066132d
Compare with similar skills
Building With Medusa 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 |
|---|---|---|---|---|---|---|
| Building With Medusa this skillmedusajs/medusa-agent-skills | 228 | — | ~4.1k | Automated safety check: Pass | None | |
| Agentsbutterbase-ai/butterbase-skills | 534 | — | ~1.8k | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 4 repos | ~1.2k | Automated safety check: Pass | MIT | |
| MCP Integration for Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~3.1k | Automated safety check: Pass | Apache-2.0 | |
| Crush Configurationcharmbracelet/crush | 29k | — | ~3.7k | Automated safety check: Pass | Custom licence |
Similar skills
- Official
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.
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.
- Official
MCP Integration for Plugins
anthropics/claude-plugins-official
Explains how to bundle Model Context Protocol servers in a Claude Code plugin, covering config files, stdio, SSE, HTTP and WebSocket server types, and authentication.
Crush Configuration
charmbracelet/crush
Explains how to configure the Crush coding agent with crushrc or crush.json, covering providers, models, LSPs, MCP servers, hooks, permissions and config precedence.
MCP Server Builder with mcp-use
mcp-use/mcp-use
Builds, modifies, debugs, migrates and verifies TypeScript MCP servers and MCP Apps with the mcp-use framework, treating the installed package's types as the source of truth.
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Interactive tutorial where the agent teaches Medusa development by guiding you through building a brands feature, with lessons and verification checkpoints.
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Lists Medusa Cloud deployments, fetches one deployment's details and reads backend or storefront build logs through the mcloud CLI to debug failed builds.
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Runs mcloud environments commands to list, inspect, create, delete, redeploy or rebuild environments in Medusa Cloud projects.
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Related
Works with
Categories
Questions about Building With Medusa
What does Building With Medusa do?
Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic). Building With Medusa is an agent skill from medusajs/medusa-agent-skills. Load automatically when planning, researching, or implementing ANY Medusa backend features (custom modules, API routes, workflows, data models, module links, business logic).
When should I use Building With Medusa?
Building With Medusa fits situations like: tasks that involve MCP servers.
How do I install Building With Medusa in Claude Code?
Run `npx skills add medusajs/medusa-agent-skills --skill building-with-medusa -a claude-code`. Or copy the skill folder (plugins/medusa-dev/skills/building-with-medusa in medusajs/medusa-agent-skills) into .claude/skills/building-with-medusa in your project. Claude Code loads it when a task matches its description.
How do I install Building With Medusa in Codex?
Run `npx skills add medusajs/medusa-agent-skills --skill building-with-medusa -a codex`. Or copy the skill folder (plugins/medusa-dev/skills/building-with-medusa in medusajs/medusa-agent-skills) into .agents/skills/building-with-medusa in your project. Codex loads it when a task matches its description.
Can I use Building With Medusa 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 medusajs/medusa-agent-skills --skill building-with-medusa -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/building-with-medusa, .gemini/skills/building-with-medusa, .github/skills/building-with-medusa and .opencode/skills/building-with-medusa in your project.
What does Building With Medusa need to run?
Going by SKILL.md and its folder, Building With Medusa needs the command-line tools its instructions call (npm, curl and npx). Our summary lists: Node.js.
Does Building With Medusa access the network?
SKILL.md contains no URLs. Its commands use npm, curl and npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Building With Medusa 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 Building With Medusa use?
No licence was found for Building With Medusa or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Building With Medusa use?
About 4.1k tokens (SKILL.md is roughly 16k 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 Building With Medusa?
Skills that share tags, products or a category with Building With Medusa: Agents (butterbase-ai/butterbase-skills, 534 stars), MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars) and MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Building With Medusa?
medusajs (a GitHub organization) maintains it in medusajs/medusa-agent-skills, which has 228 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on October 5, 2026.
Source: medusajs/medusa-agent-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.