Mobile application performance testing including app launch time, frame rendering, memory profiling, battery consumption, network throttling, and crash analytics using Appium, XCTest, and Espresso with real device testing.

Generate and run mutation tests to measure test suite effectiveness by introducing code mutations and verifying detection rates.

Analyze page load performance using Core Web Vitals, Lighthouse scores, resource waterfall analysis, and performance budgets with automated regression detection.

Generate optimized test combinations using pairwise (all-pairs) testing algorithms to achieve maximum coverage with minimum test cases across multiple input parameters

Generate realistic performance test scenarios with load profiles, ramp-up patterns, think times, and acceptance criteria derived from production traffic analysis

Enterprise-grade Playwright test automation framework using 8-layer architecture with Page Object Model, Module Pattern, custom fixtures, API testing layer, structured logging, data generators, multi-browser support, Docker, CI/CD pipelines, and custom HTML reporting.

Testing patterns for Playwright AI-powered agents including the Planner, Generator, and Healer architecture for self-healing test automation, intelligent test generation, and adaptive test execution strategies.

CLI-first browser automation using Playwright CLI for navigation, form filling, snapshots, screenshots, data extraction, and UI-flow debugging from the terminal.

Advanced Playwright automation with auto-detection, custom fixtures, trace debugging, visual testing, mobile emulation, and production-grade test architecture.

Build lightweight production smoke test suites that verify critical user paths, API health, and third-party integrations after every deployment.

Detect and diagnose race conditions in web applications through concurrent interaction testing, state mutation analysis, and timing-sensitive scenario reproduction.

Convert bug reports and incident post-mortems into automated regression tests that prevent recurrence of previously discovered defects.

Systematically test responsive layouts across breakpoints to find overflow, overlap, and alignment bugs using viewport simulation and visual comparison.

Cross-platform desktop and application screenshot capture for visual testing, UI verification, and automated visual comparison across macOS, Linux, and Windows.

Comprehensive SDET interview preparation covering coding challenges, system design for testing, automation framework design, CI/CD pipeline questions, testing strategy discussions, and behavioral interview patterns for QA engineering roles.

Repository-grounded threat modeling that enumerates trust boundaries, assets, attacker capabilities, abuse paths, and mitigations to produce actionable AppSec-grade threat models.

Automatically generate comprehensive test cases from user stories and acceptance criteria using BDD patterns, equivalence partitioning, and risk-based prioritization

Identify untested code paths, uncovered branches, and missing test scenarios using coverage analysis, risk mapping, and change-based coverage tracking

Build reusable test data factories with realistic fake data generation, relationship handling, and deterministic seeding for reproducible tests.

Quantify and prioritize test technical debt by analyzing coverage gaps, flaky test ratios, outdated assertions, and missing test categories across codebases.

Test plan generation skill covering requirements analysis, test strategy, coverage matrices, risk-based testing, and test estimation techniques.

Building test reporting dashboards with real-time execution metrics, trend analysis, flaky test detection, coverage visualization, and integration with Allure, ReportPortal, and custom dashboards using Grafana and Prometheus.

Comprehensive test strategy design methodology covering risk-based testing, test pyramid optimization, coverage planning, environment strategy, data management, and test automation ROI analysis for enterprise and startup contexts.

End-to-end test automation using testRigor's plain English syntax for writing maintainable tests without coding, covering cross-browser testing, mobile testing, API validation, and integrations with CI/CD pipelines.

Identify and log user experience friction points including excessive clicks, confusing navigation, slow interactions, and workflow bottlenecks through automated heuristic analysis

Enforces rigorous verification evidence before any claims of task completion, preventing false positives, untested deployments, and premature celebration with a structured gate function.

Natural language test automation methodology where tests are written as plain English instructions, leveraging AI agents to interpret intent, generate executable tests, and maintain test suites without traditional code-based selectors or assertions.

Anthropic's official web application testing skill using native Python Playwright scripts with helper utilities for server lifecycle management, browser automation, and comprehensive E2E testing workflows.

You are a content strategist who specialises in technical and founder LinkedIn content. Your job is to convert raw input into a high-performing LinkedIn post that follows the platform's proven content

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Scrape daily job listings from YCombinator's Workatastartup platform without duplicates. Use this skill when asked to scrape YC jobs, update the YC companies list, or retrieve the latest startup jobs. It handles authentication, extracts company slugs via Inertia.js JSON payloads, falls back to public YC job pages when necessary, and maintains a local SQLite database to track historical jobs and prevent duplicates.

Rewrites AI-generated marketing copy to sound naturally human. It removes common AI cliches, adjusts the pacing, and ensures the tone is authentic and engaging.

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Coach an AlignFirst spec-plan-execute or AAD workflow using a CLI wrapper around the claude command. Use when orchestrating coding agents through AlignFirst protocols non-interactively.

Use when defining or implementing Go interfaces, designing abstractions, creating mockable boundaries for testing, or composing types through embedding. Also use when deciding whether to accept an interface or return a concrete type, or using type assertions or type switches, even if the user doesn't explicitly mention interfaces. Does not cover generics-based polymorphism (see go-generics).

Use when working with Go formatting, line length, nesting, naked returns, semicolons, or core style principles. Also use when a style question isn't covered by a more specific skill, even if the user doesn't reference a specific style rule. Does not cover domain-specific patterns like error handling, naming, or testing (see specialized skills). Acts as fallback when no more specific style skill applies.

Skills are core capability components used to create Decision Agents for specific tasks. They are essentially the "power system" of a Decision Agent. The main categories are listed below:

You are a Russian text quality assistant. When the user selects text and invokes this skill, apply the rules below: fix typography automatically, flag stop-words and anti-patterns, suggest improvement

Comprehensive guide for building Chrome extensions with Manifest V3. Use this skill whenever the user mentions Chrome extension, browser extension, manifest.json, content script, service worker (in extension context), popup, side panel, chrome.runtime, chrome.tabs, chrome.storage, chrome.scripting, background script, MV3, Manifest V3, or any Chrome extension API. Also trigger when the user wants to inject scripts into web pages, communicate between page and background, bypass CSP from a content script, build an RPC layer over chrome messaging, or publish to the Chrome Web Store. Covers both new extension projects and adding features to existing ones. Do NOT use for framework-specific questions.

Write professional press releases for any occasion, media type, and country. Use when the user wants to write, draft, or improve a press release, communiqué de presse, media announcement, news release, or PR statement — including product launches, funding rounds, partnerships, crisis communications, earnings, executive hires, events, M&A, open source milestones, and media advisories. Covers all release types, media targets (print, digital/wire, broadcast, social/SMPR, trade press), and region-specific conventions (Western/Eastern Europe, Americas, Middle East, Africa, Asia, Oceania). Also trigger when the user says 'I need to announce something' or 'how do I tell the press about X.'

Write compelling technical articles and blog posts for developer audiences. Use this skill whenever the user asks to write a blog post, technical article, or any long-form technical content. Also trigger when the user says 'write about [technical topic]', 'help me draft an article', 'turn this into a blog post', 'write a post about', 'I want to publish something about', or mentions writing for a developer audience. Covers the full pipeline: idea sharpening, hook/title generation, article structure, body drafting, and editing. Even if the user just says 'I want to write about X' without specifying format, use this skill. Do NOT use for platform-specific optimization, newsletter strategy, or ghostwriting voice matching.