medusa-modules

medusa-modules is a skill for Claude Code from OrcaQubits/agentic-commerce-skills-plugins. It costs 39 tokens per session (1,492 once invoked), scanned A, original, MIT.

A guide to building custom Medusa v2 modules, which are self-contained pieces of application functionality containing data models, services, and business rules.

In plain words
What is it for?
Use it to create data models and services, add startup loaders and database migrations, register a module, and connect modules with links.
Why use it?
It gives custom features a defined structure and a way to communicate with other Medusa parts without directly tying their code together.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the medusa-commerce plugin — 19 skills, 1 agent shipped together

Good fit Use it to create data models and services, add startup loaders and database migrations, register a module, and connect modules with links.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add OrcaQubits/agentic-commerce-skills-plugins --skill medusa-modules
Clone the repo
git clone --depth 1 https://github.com/OrcaQubits/agentic-commerce-skills-plugins

Made for: Claude Code.

Or install medusa-commerce, the plugin that ships this one along with the rest of its 19 skills, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for medusa-modules

README.md
[![agentmods](https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules/github.svg)](https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules)
Your own site
<a href="https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules"><img src="https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for medusa-modules

Your own site · 80×15
<a href="https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules"><img src="https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/medusa-modules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,492 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.01492
Opus 5 $0.00019 $0.00746
Sonnet 5 $0.00008 $0.00298
Haiku 4.5 $0.00004 $0.00149

Measured 2d ago against content hash 6eeaf236b5df, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-16, from the pricing page.

Security

Grade A, and why

medusa-modules scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

medusa-commerce/skills/medusa-modules/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Medusa v2 Custom Modules

Before writing code

Fetch live docs:

  1. Fetch https://docs.medusajs.com/learn/fundamentals/modules for module overview
  2. Web-search site:docs.medusajs.com DML data model reference for model property types
  3. Web-search site:docs.medusajs.com MedusaService methods for base service API
  4. Web-search site:docs.medusajs.com module links for linking modules together
  5. Web-search site:docs.medusajs.com module container registration for dependency injection

Module Concept

A module is a self-contained package of functionality in Medusa v2:

  • Encapsulates data models, services, and business logic
  • Registered in medusa-config.ts under the modules array
  • Accessed from workflows, API routes, and subscribers via the dependency container
  • Modules communicate through links, not direct imports

Module Directory Structure

File Purpose
src/modules/my-module/models/my-entity.ts DML data model
src/modules/my-module/service.ts Service extending MedusaService
src/modules/my-module/loaders/seed.ts Optional loader (runs on startup)
src/modules/my-module/migrations/ Auto-generated by CLI
src/modules/my-module/index.ts Module definition export

DML Data Models

Property Types

DML Type Database Column Notes
model.id() Primary key UUID Auto-generated
model.text() text / varchar String fields
model.number() integer Numeric fields
model.bigNumber() numeric Precise decimals (prices)
model.boolean() boolean True/false
model.dateTime() timestamptz Date/time values
model.json() jsonb Arbitrary JSON
model.enum() enum Constrained values
model.array() array Array of primitives

Relationship Types

Relationship DML Method Description
Has One model.hasOne() One-to-one owned
Has Many model.hasMany() One-to-many owned
Belongs To model.belongsTo() Inverse of hasOne/hasMany
Many to Many model.manyToMany() Junction table auto-created

Read the full file on GitHub · 178 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 178 lines · 39 tokens per session scan A 6eeaf236b5df

Subscribe to this mod's changes

medusa-modules is a skill published in the GitHub repository OrcaQubits/agentic-commerce-skills-plugins (39 stars, last pushed 2d ago), licensed MIT. It adds 39 tokens to every session and 1,492 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-15.

Related

Other skills, from other repositories

archestra-dev-interactions-migrations

Use BEFORE writing or running any Drizzle migration that touches the interactions table (or any other very large, write-hot table). The interactions table is the platform's biggest, append-heavy table — every LLM proxy call writes a row — so a careless migration can take a write-blocking lock and stall the proxy.…

archestra-ai/archestra · 118 tokens

archestra-dev-llm-providers

Use when adding an LLM provider, changing proxy adapters or provider routes, fixing streaming/tool-call translation bugs, editing model fetchers or model handling, or touching provider credentials/enums and model constants.

archestra-ai/archestra · 49 tokens

archestra-dev-backend

Use when adding or changing Archestra backend routes, models, services, API request/response schemas, endpoint permissions, or OpenAPI/codegen for the generated API client.

archestra-ai/archestra · 40 tokens

debridge

Complete deBridge Protocol SDK for building cross-chain bridges, message passing, and token transfers on Solana. Use when building cross-chain applications, bridging assets between Solana and EVM chains, or implementing trustless external calls.

internet-court/internet-court-skill · 48 tokens

mppx

TypeScript SDK for the Payment HTTP Authentication Scheme. Handles 402 Payment Required flows with Tempo, Stripe, and other payment methods. Use when integrating payments or mppx into a client or server application.

internet-court/internet-court-skill · 45 tokens

near-intents

Cross-chain token swap integration using NEAR Intents 1Click API. Use when building swap widgets, bridge interfaces, or multi-chain transfers across EVM, Solana, NEAR, TON, Stellar, and Tron.

internet-court/internet-court-skill · 49 tokens