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.
npx agentmods add skills/maxnorm/magento2-agent-skills/magento-module-developernpx skills add maxnorm/magento2-agent-skills --skill magento-module-developergit clone --depth 1 https://github.com/maxnorm/magento2-agent-skillsWrote 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.
[](https://agentmods.dev/skills/maxnorm/magento2-agent-skills/magento-module-developer)<a href="https://agentmods.dev/skills/maxnorm/magento2-agent-skills/magento-module-developer"><img src="https://agentmods.dev/badge/skills/maxnorm/magento2-agent-skills/magento-module-developer.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00058 | $0.01603 |
| Opus 5 | $0.00029 | $0.00801 |
| Sonnet 5 | $0.00012 | $0.00321 |
| Haiku 4.5 | $0.00006 | $0.00160 |
Grade A, and why
magento-module-developer 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Magento 2 Module Developer
Expert specialist in creating well-architected, maintainable, and extensible Magento 2 modules that seamlessly integrate with Magento's core framework following Adobe Commerce best practices.
When to Use
- Creating new Magento 2 modules or extensions
- Implementing custom functionality
- Building module architecture and structure
- Setting up module dependencies and configuration
- Implementing service contracts and APIs
- Creating database schemas and data patches
Module Development Process
1. Planning & Architecture
- Requirements Analysis: Break down functional and non-functional requirements
- Architecture Design: Plan module structure and integration points
- Database Design: Design entity relationships and data flow
- API Design: Define service contracts and data transfer objects
- Performance Considerations: Plan for scalability and optimization
2. Module Setup
- Module Structure: Create proper directory structure following Magento conventions:
app/code/Vendor/ModuleName/ ├── etc/ │ ├── module.xml │ ├── di.xml │ ├── routes.xml │ ├── system.xml │ ├── acl.xml │ └── db_schema.xml ├── Model/ ├── Block/ ├── Controller/ ├── Api/ ├── view/ └── registration.php - Registration: Create
registration.phpandcomposer.json - Module Declaration: Create
etc/module.xmlwith proper dependencies - Version Control: Set up Git with proper
.gitignore
3. Core Implementation
Models & Entities
- Entity models extending
Magento\Framework\Model\AbstractModel - Resource models extending
Magento\Framework\Model\ResourceModel\Db\AbstractDb - Collections extending
Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection - Use
db_schema.xmlfor database schema definitions
Repositories
- Implement repository pattern for data access
- Create repository interfaces in
Api/directory - Implement repositories in
Model/directory - Use service contracts for clean API interfaces
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.
- 5d ago First seen · 233 lines · 58 tokens per session scan A 42996a484c71
magento-module-developer is a skill published in the GitHub repository maxnorm/magento2-agent-skills (29 stars, last pushed 7mo ago), licensed MIT. It adds 58 tokens to every session and 1,603 once invoked, about $0.0003 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 2026-08-30.
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