All Skills

Use when profiling CPU/memory hot paths, generating flame graphs, or capturing JFR/perf evidence.

Communication coaching for working with a Cs (The Editor) DISC type — precise, reserved, thorough. Covers do's, don'ts, meetings, email, feedback, and conflict. Powered by Crystal's DISC framework.

Generate Excalidraw diagrams (.excalidraw JSON files) for whiteboarding, flowcharts, architecture diagrams, sequence diagrams, mind maps, wireframes, and org charts. Use when user requests diagrams, visual documentation, system architecture visualization, process flows, or any hand-drawn style diagram. Triggers on requests mentioning Excalidraw, diagram creation, flowcharts, architecture diagrams, sequence diagrams, wireframes, or visual documentation.

Build terminal user interface (TUI) applications with the Textual framework. Use when creating new Textual apps, adding screens/widgets, styling with TCSS, handling events and reactivity, testing TUI apps, or any task involving "textual", "TUI", or terminal-based Python applications.

Meta-skill for internal codebase exploration at varying depths (quick/deep/architecture)

Use when synthesizing perf findings into evidence-backed recommendations and decisions.

Use when executing multiple tasks with dependencies - automatically determines optimal parallel execution order while respecting task dependencies through DAG scheduling

Comprehensive audio analysis with waveform visualization, spectrogram, BPM detection, key detection, frequency analysis, and loudness metrics.

Use before finalizing answers or PRs: confirm requirements met, run checks, and avoid “looks good” without evidence in VS Code Copilot Agent mode.

**English | [한국어](WHAT_IS_SKILL_kr.md)** ## SKILL A skill is essentially a folder containing a `SKILL.md` file. This file contains metadata (at minimum, a name and description) and instructions that tell an agent how to perform a specific task. Skills may also include scripts, templates, and refer

Audit your LaunchDarkly feature flags to understand the landscape, find stale or launched flags, and assess removal readiness. Use when the user asks about flag debt, stale flags, cleanup candidates, flag health, or wants to understand their flag inventory.

Problem-solving strategies for predicate logic in mathematical logic

Automatically fetch YouTube video transcripts, generate structured summaries, and send full transcripts to messaging platforms. Detects YouTube URLs and provides metadata, key insights, and downloadable transcripts.

Implements a complete workflow for resolving GitHub issues directly from Claude Code. Guides through the full lifecycle from fetching issue details, analyzing requirements, implementing the solution, verifying correctness, performing code review, committing changes, and creating a pull request. Use when user asks to "resolve issue", "implement issue", "work on issue #N", "fix issue", "close issue", or references a GitHub issue number for implementation. Triggers on "github issue workflow", "resolve github issue", "implement issue #", "work on issue".

Coaches Directors and executives through the transition to VP or CPO across four situations: preparing, interviewing, newly landed, or recalibrating at executive level.

Subscribe to a skill event. Adds a subscription that injects context before or after a skill runs. Supports optional conditions at both insert-level (inherited by all subscriptions) and subscription-level (AND-stacked). Conditions include fileExists, gitBranch, envSet, envEquals, fileContains (with optional regex).

Create effective agent skills through guided briefing process. Use when user wants to: (1) create a new skill, (2) make a skill, (3) build a skill, (4) set up a skill, (5) initialize a skill, (6) design a skill, (7) update or modify existing skill, (8) plan skill architecture, or (9) learn about skill structure. Trigger on phrases like "create skill", "new skill", "make skill", "skill for X", "build skill", "design skill", or "help me create skill".

Designs relational database schemas, writes optimized SQL queries, manages Alembic migrations, and configures RxDB for offline-first client-side applications. Use for all data modeling, schema design, query optimization, and migration tasks. Always confirm the existing stack before applying PostgreSQL or RxDB defaults.

Provide number theory algorithm implementations and guidance

Analyzes your recent Claude Code chat history to identify coding patterns, development gaps, and areas for improvement, curates relevant learning resources from HackerNews, and automatically sends a personalized growth report to your Slack DMs.

Use when planning or designing features and need to understand current codebase state, find existing patterns, or verify assumptions about what exists; when design makes assumptions about file locations, structure, or existing code that need verification - prevents hallucination by grounding plans in reality

Conducts a comprehensive multi-perspective architecture review using ALL architecture team members. Use when the user requests "Start architecture review", "Full architecture review", "Review architecture for version X.Y.Z", "Conduct comprehensive review", or when they want assessment from multiple perspectives. Do NOT use for single-specialist reviews (use specialist-review instead) or for status checks (use architecture-status instead).

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Use when starting feature work that needs isolation from current workspace or before executing implementation plans - creates isolated git worktrees with smart directory selection and safety verification