Claude Code + Magento

Claude Code is Anthropic’s official CLI for Claude that runs locally against your real source tree. Unlike chat-window ChatGPT, Claude Code reads your actual vendor/, app/code/, db_schema.xml and DI graph — so suggestions reference your real classes, plugins and observers, not generic Magento snippets. It edits files, runs your tests, and commits PRs end-to-end. For Magento specifically, this means no hallucinated APIs, no fictional ObjectManager calls, and no Magento 1.x advice on a Magento 2.4.x repo.

Five steps: (1) install Claude Code via npm i -g @anthropic-ai/claude-code; (2) cd into your Magento root; (3) seed a CLAUDE.md at the repo root with project rules (PSR-12, phpcs Magento2, no vendor edits, plugin-over-rewrite, db_schema not raw SQL); (4) add slash-commands for repeated workflows (e.g. /scaffold-module, /setup-patch); (5) run with --allowedTools scoped to Bash(composer:*),Bash(bin/magento:*) for safety. The full setup guide ships in our Claude Code developer guide.

Yes — on first review, in our experience. Every commit is gated through a CI pipeline that runs phpcs with Magento2 + MEQP2 standards, phpmd, phpstan level 6, php-cs-fixer, plus the official Adobe Commerce Marketplace EQP scanner. Claude Code follows the rules in CLAUDE.md — prefer plugins over rewrites, no vendor edits, db_schema.xml not raw SQL, MFTF + PHPUnit alongside features. The output is human-reviewed before commit, and we’ve shipped 60+ Marketplace-listed extensions this way.

No. Claude Code runs locally on my machine inside your private repo. Anthropic’s commercial API (Claude Pro / Team / API plan) does not train on your inputs — that’s contractual under their Commercial Terms. We sign your NDA on day 0, route Claude through Anthropic’s zero-data-retention endpoint (anthropic-version: 2023-06-01 with retention disabled), and never expose customer PII or order data. The codebase stays in your VCS — nothing leaves except git pushes you approve.

No — it makes one human Magento developer 3–5× faster, especially on boilerplate-heavy work like setup patches, db_schema, observer wiring, MFTF tests, and Hyvä theme phtml. It’s not a replacement for senior architectural decisions, code review, performance debugging, or production incident response. Think of it as “senior Magento dev with a tireless intern” — the AI handles repetitive scaffolding, the human handles judgement calls. We bill per-project, not per-hour, so you get the speed-up without paying for the AI to think.

Tiny — usually under 5% of project total. A 4-week Project Sprint typically burns < $200 in Anthropic API charges (Claude Sonnet 4.6 with prompt caching enabled). On a $2,499 sprint, that’s < 8% of cost. We bill the API charges back at-cost (or include them in the fixed price — your choice). Anthropic charges $3 / $15 per million input/output tokens for Sonnet. With prompt caching, repeated reads of db_schema.xml and vendor/magento/ drop 90% of input cost.

Yes. We make “tests included” a hard rule in CLAUDE.md, so every feature ships with: (a) PHPUnit unit tests for service classes (mocked dependencies, > 70% coverage on new code); (b) MFTF (Magento Functional Testing Framework) coverage for admin grids, storefront checkouts, and any flow with side-effects; (c) integration tests against a real Magento install where DI / events matter. Tests are generated alongside features and run in CI before any PR is merged. We’ve built a slash-command (/test-coverage-report) that produces a per-class coverage diff.

All actively-supported Magento versions: Open Source 2.4.4–2.4.9, Adobe Commerce 2.4.4–2.4.9, Adobe Commerce Cloud. We also handle Magento 1.x → 2 migrations — Claude Code is excellent at translating M1 module structure to M2 declarative schema, plugins, and DI. For 2.4.9 specifically (the current GA, May 2026), Claude Code knows the new Hyvä Checkout integration, security patches, and PHP 8.4 compatibility shifts.

Yes, but the workflow differs. On Luma, Claude Code knows RequireJS, KnockoutJS, UIComponent XML, and Magento_Ui scaffolding — so it’ll write a requirejs-config.js, a .html Knockout template, and the matching component class. On Hyvä, it scaffolds .phtml with Tailwind classes, Alpine.js x-data attributes, and Hyvä_Compatibility-Module bridges for legacy extensions. We have separate slash-commands per stack. See our dedicated Claude Code + Hyvä page for the deep-dive.

Yes — we encode this as a top-level rule in CLAUDE.md with explicit examples: “Never modify vendor/. Always extend via plugins, observers, di.xml preferences, or theme overrides. Reads are fine, writes are forbidden.” Claude Code reads vendor for context (which is critical for understanding extension points) but writes only into app/code/, themes, and your project root. Every PR is checked for vendor-path writes via a pre-commit hook — commits that touch vendor are blocked at git level.

Across 30+ Magento projects in 2025–2026 with measured timelines: 3–5× faster on boilerplate (setup patches, db_schema, scaffolded modules, MFTF tests, Hyvä phtml), 2× faster on integration work (payment gateways, ERP webhooks, GraphQL resolvers), and roughly same speed on novel architectural decisions where human judgement dominates. Net effect on a 4-week sprint: typically delivered in 2–2.5 weeks, with the saved time spent on extra QA, accessibility, and performance polish — not billed back to the client.

14 days of free post-launch bug-fix coverage on every project — same warranty whether the code came from human keystrokes or AI suggestions. After day 14, optional retainer (USD 999/mo) for continued coverage. Bug-fix scope: anything that breaks because of code we shipped, including AI-generated code. What’s not covered: bugs in your existing code we didn’t touch, third-party extension issues, server / hosting failures. Every bug fix is itself reviewed by Claude Code + a human before re-deploy — so we don’t paper over root causes.