This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.

This skill should be used when the user asks to "create a hookify rule", "write a hook rule", "configure hookify", "add a hookify rule", or needs guidance on hookify rule syntax and patterns.

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

Audit and improve CLAUDE.md files in repositories. Use when user asks to check, audit, update, improve, or fix CLAUDE.md files. Scans for all CLAUDE.md files, evaluates quality against templates, outputs quality report, then makes targeted updates. Also use when the user mentions "CLAUDE.md maintenance" or "project memory optimization".

Analyze a codebase and recommend Claude Code automations (hooks, subagents, skills, plugins, MCP servers). Use when user asks for automation recommendations, wants to optimize their Claude Code setup, mentions improving Claude Code workflows, asks how to first set up Claude Code for a project, or wants to know what Claude Code features they should use.

nutshell is an open standard for packaging task context that AI agents can understand. One CLI gives you structured task bundles with context, credentials, acceptance criteria, and delivery tracking — no platform required.

Curate and analyze technical articles from engineering blogs about AI, software engineering, and emerging tech trends. Use when user asks about tech news, AI updates, engineering blogs, new frameworks, industry trends, or wants a daily tech briefing. Surfaces relevant content from authoritative sources with actionable insights.

Scan Apple Mail inbox for unread, actionable, and priority messages. Use this when the user asks to check their email, see unread messages, find urgent emails, or triage their inbox. Returns categorized email counts and details from the last 24-48 hours.

Extract transaction data from PDF bank and credit card statements.

Combine multiple CSV/Excel transaction files into a single consolidated file.

Generate a comprehensive daily briefing combining calendar events, email inbox status, and reminders. Use when the user asks to plan their day, get a morning briefing, or wants an overview of their schedule and tasks. This orchestrates multiple skills together.

TypeScript-first schema validation and type inference. Use for validating API requests/responses, form data, env vars, configs, defining type-safe schemas with runtime validation, transforming data, generating JSON Schema for OpenAPI/AI, or encountering missing validation errors, type inference issues, validation error handling problems. Zero dependencies (2kb gzipped).

Edit, rewrite, proofread, or draft blog articles, portfolio project descriptions, and personal essays for johannschopplich.com, matching Johann's personal writing style – intimate, reflective, slightly poetic, wryly humorous. Use when working on any long-form personal content destined for johannschopplich.com.

Validate GPU kernel correctness by comparing reference and optimized outputs. Use when verifying that an optimized or modified kernel matches a reference implementation.

Commit current changes and create a pull request for review

End-to-end review, fix, publish, and verify a blog post PR from another author

Build and embed a React widget into a Jekyll blog post as a self-contained HTML file

Create a new blog post with branch, front matter, and asset folder

Start the local Jekyll dev server and open a post in the browser

Use MCP Vectorizer as primary data source for project information instead of file reading.

Use MCP Synap for persistent task and data storage across context windows.

Use MCP Supabase for database operations, authentication, and storage.

Use MCP Serena for AI-powered development assistance, code analysis, and intelligent automation.

Use MCP Playwright for automated browser testing and web automation.