--- title: Stop Repeating Yourself in Code Review: Build a Custom... description: Scott Keck-Warren demonstrates how to build a custom Mago lint rule to enforce framework-specific import conventions in PHP codebases, such as requiring... canonical: https://daily.dev/posts/stop-repeating-yourself-in-code-review-build-a-custom-mago-lint-rule-e7vrqq2fn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Stop Repeating Yourself in Code Review: Build a Custom Mago Lint Rule | daily.dev og:description: Scott Keck-Warren demonstrates how to build a custom Mago lint rule to enforce framework-specific import conventions in PHP codebases, such as requiring... og:url: https://daily.dev/posts/stop-repeating-yourself-in-code-review-build-a-custom-mago-lint-rule-e7vrqq2fn og:image: https://api.daily.dev/og/posts/e7VRqQ2Fn.png og:image:alt: Stop Repeating Yourself in Code Review: Build a Custom Mago Lint Rule og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Stop Repeating Yourself in Code Review: Build a Custom Mago Lint Rule **[PHP Architect](https://daily.dev/sources/phparchitect)** · [@shocm](https://daily.dev/shocm) · 1 min read · 0 upvotes · 0 comments ## Summary Scott Keck-Warren demonstrates how to build a custom Mago lint rule to enforce framework-specific import conventions in PHP codebases, such as requiring Illuminate\Support\Carbon instead of Carbon\Carbon. The walkthrough covers writing the rule test-first so unwritten team conventions get codified into an automated check that runs before code reaches CI, rather than being repeated manually during code review. ## Content Every team has rules that live in someone's head instead of in a tool. In this article, Scott Keck-Warren walks through building a custom Mago lint rule to catch framework-specific import violations — like using Carbon\Carbon instead of Illuminate\Support\Carbon — test-first, before they ever block CI. https://www.phparch.com/2026/08/stop-repeating-yourself-in-code-review-build-a-custom-mago-lint-rule/ --- Tags: [#php](https://daily.dev/tags/php), [#laravel](https://daily.dev/tags/laravel), [#code-review](https://daily.dev/tags/code-review) [View this post on daily.dev](https://daily.dev/posts/stop-repeating-yourself-in-code-review-build-a-custom-mago-lint-rule-e7vrqq2fn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/stop-repeating-yourself-in-code-review-build-a-custom-mago-lint-rule-e7vrqq2fn","headline":"Stop Repeating Yourself in Code Review: Build a Custom Mago Lint Rule","text":"Scott Keck-Warren demonstrates how to build a custom Mago lint rule to enforce framework-specific import conventions in PHP codebases, such as requiring Illuminate\\Support\\Carbon instead of Carbon\\Carbon. 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