productivity▌

Systematic diagnosis and resolution of app hangs. A hang occurs when the main thread is blocked for more than 1 second, making the app unresponsive to user input.

Retrospectives are critical ceremonies for team learning and continuous improvement. Effective facilitation creates psychological safety, encourages honest feedback, and drives tangible improvements.

Clean messy data in the active sheet or a specified range.

Core principle 90% of file storage problems stem from choosing the wrong storage location, misunderstanding file protection levels, or missing backup exclusions—not iOS file system bugs.

Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.

Reduce infrastructure costs through intelligent resource allocation, reserved instances, spot instances, and continuous optimization without sacrificing performance.

Core Data issues manifest as production crashes from schema mismatches, mysterious concurrency errors, performance degradation under load, and data corruption from unsafe migrations. Core principle 85% of Core Data problems stem from misunderstanding thread-confinement, schema migration requirements, and relationship query patterns—not Core Data defects.

This skill provides a complete guide for getting started with Cloud Firestore Standard Edition, including provisioning, securing, and integrating it into your application.

Apple's Human Interface Guidelines define the visual language, interaction patterns, and accessibility standards that make iOS apps feel native and intuitive. The core principle: clarity and consistency through thoughtful design.

Self-Evolving Skill: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues.