x_code Summary The challenge involves deploying multiple white-label applications—software with identical core logic but distinct branding—to the Apple App Store. The primary technical and policy risk is violating App Store Review Guideline 4.3 (Spam), which prohibits submitting multiple apps that are substantially similar. Attempting to host these under a single developer account often leads to mass … Read more
Summary The issue stems from a missing or misconfigured SDK package in Visual Studio 2026 Community Insiders. Attempts to compile an Android project resulted in a DLL instead of an APK, indicating the SDK “Microsoft.NET.Sdk.Android” was not found during installation. Root Cause SDK installation failed Project file set to reference “Microsoft.NET.Sdk” Incorrect output type expected: … Read more
Trace-to-Fix: How Are You Actually Improving RAG/Agents After Observability Flags Issues? Summary Observability tools like Langfuse, LangSmith, and Arize excel at surfacing failures in RAG and agent systems, but the path from “I see the failure in the trace” to “I found the fix” remains unclear for many teams. This postmortem examines the repeatable workflow … Read more
Summary A developer attempted to publish an Android application using FullScreenIntent functionality without qualifying as a traditional calling or alarm app. Despite implementing the runtime permission flow correctly, the Play Store rejected the submission due to the presence of android.permission.USE_FULL_SCREEN_INTENT in the manifest. This postmortem examines the policy violations, misunderstood platform constraints, and proper architectural … Read more
Summary STM32Duino core produces double CRLF (\r\n\r\n) for string constants in Serial.println() while numeric values output correctly. SAMD51 core behaves as expected with single CRLF (\r\n) for both cases. Root cause stems from HAL-level CRLF conversion conflicting with Arduino’s standard newline handling. Root Cause STM32 HAL UART drivers automatically convert \n to \r\n during transmission. … Read more
Summary A custom TemplatedControl in Avalonia failed to render visual error states (specifically the red border) despite correctly capturing and propagating validation errors. While the error text was visible via the DataValidationErrors container in the template, the inner TextBox lacked the necessary pseudoclass state to trigger the theme’s error styling. This resulted in a broken … Read more
Summary The arrow in a PlantUML sequence diagram fails to attach to the activate bar when a self‑call is followed by an activate statement. This leads to a misleading visual that suggests the call returns to the wrong scope. The root issue is a misunderstanding of how activation bars are rendered when nested self‑activations occur. … Read more
Summary This postmortem examines a common database connection management challenge in Delphi/FireDac applications transitioning from SQL Server (with MARS) to PostgreSQL compatibility. The core issue involves multiple concurrent result sets on a single database connection, where the default FireDac behavior conflicts with RAD development patterns that encourage declarative component configuration. The problem manifests when developers … Read more
Summary Spring Data JDBC does not automatically map composite ID components to their own table columns. When a composite key record (ServiceId) is used as the @Id, Spring Data JDBC expects the table to have a single column named after the ID property (or a custom column mapping). It does not introspect the composite record’s … Read more
Summary A production issue was identified in an iOS Progressive Web App (PWA) where a white gap appeared at the bottom of the screen, below the bottom navigation bar. Despite using viewport-fit=cover and 100dvh, the layout failed to extend into the safe area inset (the home indicator zone). This resulted in a broken user experience … Read more