Scripting

Write strategic, focused tests for critical user flows and core functionality using modern testing frameworks, focusing on behavior over implementation. Use this skill when creating test files, writing unit tests, integration tests, or end-to-end tests in test directories (tests/, __tests__, spec/, *.test.js, *.spec.py). Apply this skill when testing core user workflows and business-critical features, implementing test-driven development (TDD) with red-green-refactor cycles, mocking external dependencies for isolated unit tests, using clear descriptive test names that explain expected behavior, following arrange-act-assert patterns, and ensuring tests run fast and independently. This skill prioritizes testing what matters most (primary user flows) while deferring edge cases and non-critical paths until later, emphasizes behavior testing over implementation details to reduce brittleness, and uses modern frameworks like Jest, Playwright, Cypress, pytest, RSpec, or Testing Library for reliable, maintainable test

The ultimate unified development skill combining 25+ programming languages, 9+ BaaS providers, 6+ development functions, and 15+ security capabilities with AI orchestration, Context7 integration, enterprise compliance, and end-to-end project automation

Use when executing decomposed plans with parallel batches - dispatches up to 2 fresh subagents per batch with code review between batches, enabling fast parallel iteration with quality gates

Comprehensive skill for writing high-converting, AI-optimised website copy that combines Generative Engine Optimization (GEO) with strategic copywriting psychology. Use when: (1) Writing new website copy, landing pages, or marketing content, (2) Performing SEO audits or content reviews, (3) Optimising content for AI Answer Engines (Google AI, Perplexity, ChatGPT), (4) Implementing Schema markup (JSON-LD structured data), (5) Writing B2B or B2C-specific copy, (6) Creating About Us pages or brand storytelling content, (7) Writing microcopy, error messages, or UX text, (8) Ensuring accessibility and inclusive language.Invoke with: /write-website-copy, /audit-seo, /generate-schema, /validate-content, or say "use the website-copy-standards skill to..."

Generate PR documentation with UML diagrams based on Git branch differences. Explains modification reasons, content, and implementation. Uses Mermaid to draw architecture, class, sequence diagrams with exact code element names matching actual code.

Creates, analyzes, updates, and improves Claude Code hooks including configuration, scripts, and security validation. Use when user asks how hooks work, explaining hook concepts, understanding hook types and event lifecycle, describing hook configuration, creating new hooks, analyzing existing hooks for improvements, validating hook security, debugging hook activation, updating hook configurations, or when user mentions "hook", "PreToolUse", "PostToolUse", "SessionStart", or other hook event types. Handles both command hooks and prompt-based hooks across all 9 event types.

Analyze, monitor, and improve CRAP (Change Risk Anti-Patterns) scores for untested complex code. Use when users want to: (1) Reduce technical debt and code risks, (2) Identify high-risk methods that need test coverage, (3) Validate CRAP thresholds for quality gates, (4) Generate coverage reports focused on complex methods, (5) Implement test coverage improvements to lower CRAP scores, or (6) Set up automated code quality monitoring based on CRAP metrics. **CRITICAL CONSTRAINT**: Code is in production and CANNOT be modified - CRAP reduction focuses ONLY on adding test coverage.

This skill should be used when the user asks about "Electron", "WebContentsView", "BrowserView", "preload script", "contextIsolation", "IPC", or needs to work with Electron-specific functionality in XSky.

Analyze and update Python dependencies in pyproject.toml, checking for compatibility and security vulnerabilities. Use when: updating dependencies, checking security issues, dependency analysis, version pinning, pip-audit, outdated packages.

Systematic identification of race conditions, concurrency bugs, and thread-safety issues across codebases. Use when asked to find race conditions, audit concurrent code, debug non-deterministic behavior, review thread safety, find data races, or analyze async/parallel code. Supports TypeScript, JavaScript, Python, Go, Rust, and C++.

Comprehensive DevOps and deployment workflow that orchestrates infrastructure automation, CI/CD pipelines, container orchestration, and cloud deployment. Handles everything from infrastructure as code and pipeline setup to monitoring, scaling, and disaster recovery.

Create properly formatted Claude Code skills with YAML frontmatter, directory structure, and best practices. Use when creating new skills, converting documentation to skills, or learning how to write skills.

Generates RBS type signatures from Ruby source files. Triggers when creating type definitions, adding types to Ruby code, or generating .rbs files for classes/modules without existing RBS signatures.

Enables AI agents to use Braintrust for LLM evaluation, logging, and observability.Includes scripts for querying logs with SQL, running evals, and logging data.

This skill should be used when engineering decisions are being made during code implementation. The Archivist enforces decision documentation as a standard practice, ensuring every engineering choice includes rationale and integrates with Architecture Decision Records (ADRs). Use when writing code that involves choosing between alternatives, selecting technologies, designing architectures, or making trade-offs.

Implement or refactor the Python CLI tic-tac-toe game in this repo, including board model, move validation, win/draw logic, game loop, and bot behavior. Use when working on core gameplay modules or CLI entrypoints for this project.

Perform a focused web search and summarize authoritative sources.

Proactively audits developer work to ensure completeness and production-readiness. This skill should be used when reviewing code changes, validating task completion, or verifying that work meets industry standards—catching incomplete implementations, deferred features, hardcoded values, missing tests, and shortcuts before code goes to production.

Update PRD docs based on discrepancies report. Use this skill after running analyze-gaps to sync PRD documentation with codebase implementation. Handles IMPLEMENTED_NOT_DOCUMENTED, DIVERGED, and OUTDATED gaps.

a file-based long-term memory using a single JSONL file, with append-only writes and recent-window search via bash + jq.