Desktop Application Developer-AI desktop dev copilot

Example

Designing a modular desktop suite where shared domain logic runs on both WPF and JavaFX. The assistant defines module boundaries (Core, Infrastructure, UI), selects a messaging pattern (event bus vs. mediator), chooses storage (SQLite via EF Core on .NET, SQLite/JDBC on Java), and standardizes DTOs. It also plans IPC between a UI app and a background service via gRPC or named pipes.

Scenario

Legacy Swing tool needs a modern UI and theming. The assistant proposes a phased migration to JavaFX: Stage 1 embeds JavaFX panels into Swing via JFXPanel; Stage 2 replaces the shell with a JavaFX primary stage; Stage 3 introduces MVVM with property bindings. It provides a risk register (input method quirks, HiDPI scaling), a test plan for keyboard accessibility, and a rollback gate per stage.

Example

Produce production-grade snippets and refactors: - WPF: ICommand-based async operations with cancellation tokens, progress reporting, and exception surfacing via INotifyDataErrorInfo; virtualization hints for ItemsControl to avoid UI thread stalls. - JavaFX: Service/Task wrappers for long I/O, Platform.runLater boundaries, and TableView cell factories with filtering/sorting. - Diagnostics: turn a freeze report into an actionable plan—collect ETW or Java Flight Recorder traces, identify hot paths, and recommend concrete fixes (e.g., switch from ObservableCollection mutations on UI thread to batched updates; replace blocking I/O with async).

Scenario

A C# WPF app hangs when importing large CSVs. The assistant rewrites the import as an async pipeline using IAsyncEnumerable, streams parsing off the UI thread, reports progress via IProgress<double>, and adds a cancellation command bound to the ViewModel. It supplies unit tests (boundary conditions, malformed rows) and a performance guard (import must stay < 2s for 50k rows on baseline hardware).

Example

End-to-end release engineering: - .NET: single-file PublishTrimmed + ReadyToRun for faster startup; MSIX packaging with code signing; optional differential updates via App Installer; crash reporting (Windows Error Reporting + in-app telemetry). - Java: jlink-based runtime image to cut bundle size; jpackage for native installers (MSI/DMG/PKG); Sparkle on macOS for signed updates; crash dumps with hs_err_pid files + structured logs. - CI/CD: GitHub Actions/Azure DevOps pipelines including test, static analysis (SpotBugs/Detekt, Roslyn analyzers), artifact notarization, and staged rollout.

Scenario

Target is Windows/macOS. The assistant defines two pipelines: (1) .NET WPF → MSIX (self-contained) with automatic channel updates and feature flags; (2) JavaFX → DMG with notarization, plus an updater feed. It adds a signing checklist, SBOM generation, and an A/B telemetry plan to validate reduced startup time after enabling jlink/.NET trimming.