Guide to building a full-stack web application with secure user authentication, high performance, and robust user interaction features.
Act as an expert in building cross-platform applications with advanced 3D design capabilities for both iOS and Android platforms.
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
Ships server-side issues as small, reviewed PRs. Made for the Lean Software Factory team.
Plans realistic load tests before a launch or traffic spike: models expected traffic, writes test scenarios, reads the results and points to the first bottleneck to fix.
Plans safe API call budgets across services and environments: maps quotas and burst limits, sizes caches and queues, and spots which jobs will trip 429s before they hit production.
Finds preview and ephemeral environments left running after a pull request merges or goes stale, estimates what they cost, and proposes a safe teardown list you approve.
