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Measure app startup, screen rendering, and HTTP/S request behavior, then compare performance across releases and devices.

Call Claude models through a REST API, official SDKs, and asynchronous batch endpoints.

Compare application screenshots with approved visual baselines in automated UI tests.

Automate game-asset reduction with explicit quality and format controls

Collect mobile-app events for acquisition, retention, revenue and crash analysis.

A Go IDE that resolves project structure for navigation, refactoring, and code analysis.

An offline desktop toolkit for quick developer transformations, encoders, and text utilities.

Build mobile, web, and desktop interfaces from a shared Flutter codebase.

Interactive JavaScript study with projects and challenges

Define JavaScript and TypeScript schemas that validate data and infer its types.

Unicode emoji artwork with a JavaScript text-to-image parser.

Install Node.js project dependencies with a package manager built for efficient storage and workspaces.

Format and lint web-project files with a shared command-line toolchain.

Add interactive, mobile-friendly maps to a web page with a JavaScript library.

Add small reactive interactions to HTML with directives such as x-data, @click, and x-show.

Write and run JavaScript end-to-end tests across local browsers and remote grids.

Write load-test scenarios as code and control the request rate sent to an application.

Add automated accessibility rule checks to an existing browser UI test flow.

Turn text definitions into editable diagrams for software design notes and documentation.

Capture application errors with context and correlate them with performance and deployment changes.

Use app events and parameters to examine feature use, onboarding and device patterns.

Model fine-grained authorization as relationships and check whether a user can act on an object.

Adjust CSS colours and calculate contrast with focused JavaScript functions.

Generate a short sequence of gradient stops from supplied colours.