Advanced linter for Flutter and Dart developers dcm.dev. Join our discord https://discord.gg/Vzjprgk4sb. "its not AI, but it’s better!"https://bsky.app/profile/dcm.devhttps://bsky.app/profile/dcm.dev/post/3mjmgzzq25c2l🔥 DCM 1.36.0 includes 11 new rules for Flutter, Common, Equatable, & Mocktail categories. To learn how these rules can prevent potential issues and bugs, read: https://dcm.dev/blog/2026/03/19/whats-new-in-dcm-1-36-0/16 Apr 2026 12:48 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mjmgzzq25c2lhttps://bsky.app/profile/dcm.dev/post/3mj37rfrc6k25#Flutter devs: how many of these have you run into? We’ve rounded up 15 common Flutter & Dart mistakes you’ll definitely recognise: ⚠️ Memory leaks ⚠️ `setState` misuse ⚠️ Async pitfalls ⚠️ Testing gaps & more Find out how to spot and fix them before they break your app: https://dcm.dev/blog/2025/03/24/fifteen-common-mistakes-flutter-dart-development/09 Apr 2026 16:23 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mj37rfrc6k25https://bsky.app/profile/dcm.dev/post/3mijtc5de4k26🤔 Most teams can tell when a Flutter method feels too complex. The problem is that “too complex” is subjective. Read "Cyclomatic Complexity, #Flutter Guide" & learn how to shield your code and to refactor it down and protect your team now & later! https://dcm.dev/blog/2026/04/01/cyclomatic-complexity-flutter-dcm/02 Apr 2026 18:24 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mijtc5de4k26https://bsky.app/profile/dcm.dev/post/3mij5qflp6k2a✨ Still doing manual null checks in your collection literals? DCM’s prefer-null-aware-spread rule warns when you could use ...? in your #Flutter code instead. 🎥 Watch to learn how to fix it: youtu.be/92X6GXwW-N8 https://youtu.be/92X6GXwW-N802 Apr 2026 11:58 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mij5qflp6k2ahttps://bsky.app/profile/dcm.dev/post/3migdlyhxgk2oAdvanced metrics configuration in DCM is where metrics become practical. You’re not limited to one global threshold. You can tune metrics for legacy code, new features, widget-heavy UI, critical paths, and even dashboards-only tracking. In this guide, learn how you can do it 👇01 Apr 2026 09:05 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3migdlyhxgk2ohttps://bsky.app/profile/dcm.dev/post/3mieomzjkuc2o🚀 Quality code tip: Use the variable you already created. It's easy to miss, but the "use-existing-variable" rule https://dcm.dev/docs/rules/common/use-existing-variable/ catches repeated expressions when a variable already exists. 🪧 Less code 🔁 Less duplication ✅ Fewer inconsistencies31 Mar 2026 17:17 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mieomzjkuc2ohttps://bsky.app/profile/dcm.dev/post/3mic4lm5udk2d🎉 A case study with Appinio was published! Appinio is a fast-growing global market research platform. Their mobile team delivers production-grade #Flutter apps and uses DCM to maintain high development velocity without compromising long-term maintainability. How? 👇30 Mar 2026 16:49 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mic4lm5udk2dhttps://bsky.app/profile/dcm.dev/post/3mhzzvtmyrk22Is your #Flutter app silently excluding users? In our new blog: ✅ New accessibility features in Flutter 3.32 ✅ Fixing common pitfalls (labels, text scaling, contrast) ✅ Automated testing with meetsGuideline & more ✅ Practical code examples & tools https://dcm.dev/blog/2025/06/30/accessibility-flutter-practical-tips-tools-code-youll-actually-use http://dcm.dev/blog/2025/06/30/accessibility-flutter-practical-tips-tools-code-youll-actually-use27 Mar 2026 11:40 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhzzvtmyrk22https://bsky.app/profile/dcm.dev/post/3mhy7kw63zs2nA small #Flutter lint that can prevent confusing layout issues: avoid-flexible-outside-flex. This rule warns when Flexible is used outside a Flex widget, such as Row, Column, or Flex, helping keep widget tree layouts working correctly. Read more: https://dcm.dev/docs/rules/flutter/avoid-flexible-outside-flex/26 Mar 2026 18:16 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhy7kw63zs2nhttps://bsky.app/profile/dcm.dev/post/3mhvsrhohjs26Riverpod is one of the most used packages for #Flutter, and yet you might have missing points, including: ⚠️ ref .read inside build 🔄 ref .watch outside build ⏳ async gap + stale ref 🧹 missing onDispose cleanup Read more: https://dcm.dev/blog/2026/03/25/inside-riverpod-source-code-guide-dcm-rules/25 Mar 2026 19:22 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhvsrhohjs26https://bsky.app/profile/dcm.dev/post/3mhiizpgwbs2dMany teams want better code quality but struggle to know where to start. Techniques such as: 1⃣ preview all metrics first ✅ start with metrics-recommended ✏️ override thresholds for your project 👩‍💻 choose metrics based on your actual pain points Read more: https://dcm.dev/docs/guides/choosing-first-dcm-metrics20 Mar 2026 12:23 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhiizpgwbs2dhttps://bsky.app/profile/dcm.dev/post/3mhg3quy6ic22Complex conditions can impact readability in your #Flutter code. ❌ Instead of: (a && b) || (!a && c) ✅ Prefer: a ? b : c DCM’s "prefer-simpler-boolean-expressions" rule flags redundant #Dart boolean patterns and suggests more readable alternatives. Read more: https://dcm.dev/docs/rules/common/prefer-simpler-boolean-expressions/19 Mar 2026 13:20 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhg3quy6ic22https://bsky.app/profile/dcm.dev/post/3mhecusbjbs2oArrange, Act, Assert is the gold standard for unit testing 🧪 Why? It ensures tests are not doing "multiple rounds of arrange and act." DCM 1.32 introduced `prefer-test-structure` to warn when a test is not separated into these three sections. Read more: https://dcm.dev/docs/rules/common/prefer-test-structure/18 Mar 2026 20:22 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mhecusbjbs2ohttps://bsky.app/profile/dcm.dev/post/3mgwdfc4uuk25Async mistakes can quietly slow down or break your #Flutter app. This post breaks down common pitfalls and how to fix them: 🔄 Misused `FutureOr` ⚠️ Unawaited futures in `initState()` 🔁 Redundant `async/await` 🚦 Inefficient parallel calls 🧵 Confusing `.then()` chains https://dcm.dev/blog/2025/05/28/hidden-cost-async-misuse-flutter-fix/13 Mar 2026 06:54 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgwdfc4uuk25https://bsky.app/profile/dcm.dev/post/3mh6lbpwsns2i🎉 A case study with Zühlke was published! They use DCM to keep complex, mission-critical #Flutter apps maintainable across healthcare, industrial engineering, and enterprise projects. 💯 Result: faster PRs, fewer regressions, and better visibility into technical debt. How?👇16 Mar 2026 13:36 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mh6lbpwsns2ihttps://bsky.app/profile/dcm.dev/post/3mgxbx2b3qk2s#Flutter BLoC is everywhere, but hidden bugs are easy to miss: 💥 isClosed after await 🔁 same-state emits 🧠 create vs .value 🚫 public methods bypass events 🔒 sealed/immutable classes By reading BLoC source code, we see how to happen & prevent them: https://dcm.dev/blog/2026/03/11/flutter-bloc-best-practices-youre-probably-missing/13 Mar 2026 16:01 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgxbx2b3qk2shttps://bsky.app/profile/dcm.dev/post/3mgxbx2b3qk2s#Flutter BLoC is everywhere, but hidden bugs are easy to miss: 💥 isClosed after await 🔁 same-state emits 🧠 create vs .value 🚫 public methods bypass events 🔒 sealed/immutable classes By reading BLoC source code, we see how to happen & prevent them: https://dcm.dev/blog/2026/03/11/flutter-bloc-best-practices-youre-probably-missing/13 Mar 2026 16:01 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgxbx2b3qk2shttps://bsky.app/profile/dcm.dev/post/3mgwdfc4uuk25Async mistakes can quietly slow down or break your #Flutter app. This post breaks down common pitfalls and how to fix them: 🔄 Misused `FutureOr` ⚠️ Unawaited futures in `initState()` 🔁 Redundant `async/await` 🚦 Inefficient parallel calls 🧵 Confusing `.then()` chains https://dcm.dev/blog/2025/05/28/hidden-cost-async-misuse-flutter-fix/13 Mar 2026 06:54 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgwdfc4uuk25https://bsky.app/profile/dcm.dev/post/3mgudufa3wc2t🎉 We just published a case study with CarOnSale, Europe's fast-growing B2B automotive platform. They secure their Flutter mobile apps and internal libraries with DCM. 💯 The results? Smoother code reviews, automated consistency, & increased developer confidence across teams👇12 Mar 2026 11:57 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgudufa3wc2thttps://bsky.app/profile/dcm.dev/post/3mgpe2545sk2dIs your #Flutter widget tree full of Padding, Align, ClipRect and Transform widgets? In this video, we show how you can simplify those trees using a single Container widget and how the "prefer-container" rule helps you reduce unnecessary nesting: youtu.be/MdrU_8orso8 https://youtu.be/MdrU_8orso810 Mar 2026 12:17 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgpe2545sk2dhttps://bsky.app/profile/dcm.dev/post/3mgnb7653ks2kIf you are using Zed and would like to have your code checked with DCM, check out the getting started docs for the Zed extension: https://dcm.dev/docs/ide-integrations/zed/09 Mar 2026 16:21 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgnb7653ks2khttps://bsky.app/profile/dcm.dev/post/3mgfzmkkzis2eWe just published a case study with BoursoBank, France’s largest online bank! They secure mission-critical #Flutter mobile & web apps with DCM. 💯 The results? maintainable architecture, & zero crashes in payment & authentication flows for 70+ engineers Here's how they do it 👇06 Mar 2026 19:16 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgfzmkkzis2ehttps://bsky.app/profile/dcm.dev/post/3mgfk6bjgd22bEver discovered a Flutter widget and thought, “Why didn’t I see this sooner?” 🤔 We’ve uncovered 10 under-the-radar widgets that even seasoned devs almost never use! 👇 https://dcm.dev/blog/2025/01/13/ten-flutter-widgets-probably-havent-heard-of-but-should-be-using/ What widget surprised you the most?06 Mar 2026 14:40 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgfk6bjgd22bhttps://bsky.app/profile/dcm.dev/post/3mgb2g62mmk2tAre silent bugs hiding in your #Flutter Provider code? You might be missing: 💥 .value trap 🚫 .dispose gap 👀 .read vs .watch ✋ .selector logic We explored the Provider's source code to uncover common architecture mistakes: https://dcm.dev/blog/2026/03/04/flutter-provider-best-practices-youre-probably-missing/04 Mar 2026 19:47 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mgb2g62mmk2thttps://bsky.app/profile/dcm.dev/post/3mg6d6ccdjs24Once you have multiple #Flutter projects, it's often required to manage different DCM versions. Our new guide covers: 🔄 Fast version switching 💻 Helper scripts (Zsh, Bash, Fish, PS) 💙 FVM support 🤝 Team consistency with dcm_global.yaml Read here: https://dcm.dev/docs/guides/managing-dcm-versions/03 Mar 2026 17:46 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mg6d6ccdjs24https://bsky.app/profile/dcm.dev/post/3mfmvluunbs2q🤷‍♂️ Assigning values that never get used? Enable the "avoid-unused-assignment" rule that warns when an assignment is not used in the following statements. 🎥 Watch to learn more: youtu.be/HajF6gXkAik https://youtu.be/HajF6gXkAik24 Feb 2026 19:28 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mfmvluunbs2qhttps://bsky.app/profile/dcm.dev/post/3mfmg7kysfc2kWe recently published a case study with Betterment where the team adopted DCM into their workflow, which helped them to: - Cut feedback cycles from minutes to seconds - Focus on architecture review rather than styling - Ship faster & safer Full story: https://dcm.dev/customers/betterment/24 Feb 2026 14:52 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3mfmg7kysfc2khttps://bsky.app/profile/dcm.dev/post/3m5ylxpmbgs27🧠 Ever found a #Dart or #Flutter function that completely changed how you think about coding? We’ve rounded up 10 underrated functions that can simplify code, reduce boilerplate, and teach you something new about the language itself. 📖 https://dcm.dev/blog/2025/02/27/ten-lesser-known-dart-flutter-functionalities/19 Nov 2025 15:46 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3m5ylxpmbgs27https://bsky.app/profile/dcm.dev/post/3m5w2vphydk2rDart 3.10's dot shorthands are game changers for #Flutter code: ✅ shorter enums, less boilerplate, and sharper syntax. ⚠️ But beware the hidden complexities! Learn about “Practical Rulebook for Teams” 👇 https://dcm.dev/blog/2025/11/17/deeper-look-darts-dot-shorthand-hidden-complexity/18 Nov 2025 15:35 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3m5w2vphydk2rhttps://bsky.app/profile/dcm.dev/post/3m5w3zf3adk2i🖼️ Wrapping a #Flutter Image widget with an Opacity widget? That’s inefficient. The DCM rule "avoid-incorrect-image-opacity" warns you to use the "opacity" parameter directly instead. 🎥 Watch to learn how to fix it: youtu.be/ooKFXNhm_TU https://youtu.be/ooKFXNhm_TU18 Nov 2025 15:55 +0000at://did:plc:nagfdb7dd6pucjfq2mvv5r4r/app.bsky.feed.post/3m5w3zf3adk2i