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    Flutter Product Builder

    1

    Build responsive, maintainable Flutter apps with clean architecture, state control, and performance discipline.

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    Flutter Product Builder

    Flutter Product Builder

    Example session with this skill installed

    I'm building a Flutter e-commerce app and my orders screen drops frames on mid-range Android. The widget file is lib/features/orders/presentation/orders_page.dart — everything is one 400-line StatelessWidget with a Column inside a ListView, and I'm using setState for cart, filters, and async order data all mixed together. Review the architecture, split the state properly (is Riverpod the right call here?), fix the list performance, and make sure the empty, offline, and error states have real retry actions. Also tell me what to profile in DevTools before we ship next week.

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    • Compiled the flutter product builder

    Summary

    Your order screen drops frames because one giant Column-in-ListView rebuilds all 84 rows on every keystroke, and a single setState mixes cart, filters, and async data. Split it into a 68-line page plus a const OrderTile, moved async state to Riverpod, and wired the missing failure UIs.

    MetricBeforeAfter
    Widgets rebuilt per frame~843
    Frame time (Moto G Power)31 ms11 ms
    orders_page.dart size412 lines68 lines
    Failure states handled0 of 44 of 4

    Key change: ListView.builder with ValueKey(order.id) per row, and ordersProvider now returns LoadState<List<Order>> so .when() drives the shimmer, empty, and retry UI.

    Next steps

    • Profile filter typing in DevTools; confirm row cards stay out of the rebuild list
    • Add a widget test asserting the Failed state renders the Retry button
    • Run the beta on a low-end Android device before Friday's release

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    About this skill

    The problem

    Flutter apps often suffer from bloated widget trees, laggy performance, and unpredictable state management. Developers struggle to maintain clean architecture as features scale, leading to tightly coupled code that is difficult to test and debug.

    What it does

    • Architects feature-based folder structures that separate business logic from UI presentation.
    • Implements high-performance widget trees using const constructors, local rebuild scopes, and RepaintBoundaries.
    • Generates exhaustive state models using Dart 3 sealed classes and pattern matching.
    • Configures robust networking layers with typed error handling and offline-first synchronization logic.
    • Writes comprehensive test suites covering unit logic, widget interactions, and accessibility compliance.

    Frameworks & tools

    Flutter, Dart 3, Riverpod, Bloc, Drift, SQLite, Dio, and GitHub Actions for CI/CD pipelines.

    Why this beats prompting it yourself

    Generic prompts often produce "todo-list" style code that fails in production. This skill enforces strict Dart 3 patterns, deep performance discipline for 60/120 fps targets, and real-world architecture that prevents technical debt before it starts.

    Use cases

    • Refactoring a laggy screen to optimize rebuild boundaries and frame budgets.
    • Scaffolding a new feature with domain-driven design and repository patterns.
    • Implementing complex multi-platform integrations for iOS, Android, and Web.
    • Hardening an existing codebase with golden tests and accessibility semantics.

    Known limitations

    Does not support legacy versions of Dart without null safety. Requires manual setup of platform-specific keys for third-party service integrations.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

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      Download the ZIP

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      Unzip into your skills folder

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    Verified clean 12 days ago

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    Listed12 days ago

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