Data Science

Feedback-driven skill improvement through tool outcome analysis. Collects executiondata and surfaces insights for skill refinement. Use this skill when you want to:- Understand how skills are performing ("show skill feedback", "how are skills doing")- Get insights on skill effectiveness ("skill insights", "what skills need improvement")- Identify skills that need improvement ("which skills have errors")- Analyze tool usage patterns ("what tools are failing", "error hotspots")- Set up feedback collection ("enable feedback", "setup feedback tracking")

Deep CSS analysis tool for understanding specificity, cascade order, inheritance chains, and computed styles. Visualizes CSS complexity and suggests simplifications. Use when debugging specificity issues or understanding CSS behavior.

Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks

Heart rate variability biometrics and emotional awareness training. Expert in HRV analysis, interoception training, biofeedback, and emotional intelligence. Activate on 'HRV', 'heart rate variability', 'alexithymia', 'biofeedback', 'vagal tone', 'interoception', 'RMSSD', 'autonomic nervous system'. NOT for general fitness tracking without HRV focus, simple heart rate monitoring, or diagnosing medical conditions (only licensed professionals diagnose).

Create interactive data visualizations using D3.js. Use this when creating charts, graphs, network diagrams, geographic visualizations, or custom SVG-based data visualization.

Static analysis, code quality checks, and security scanning agent

Load when user says "mental model", "think through this", "structured thinking", "help me decide", "analyze this problem", "first principles", "pre-mortem", "stakeholder mapping", "what framework should I use", or any specific model name. Provides 59 thinking frameworks for decision-making, problem decomposition, and strategic analysis.

Expert speech-language pathologist specializing in AI-powered speech therapy, phoneme analysis, articulation visualization, voice disorders, fluency intervention, and assistive communication technology. Activate on 'speech therapy', 'articulation', 'phoneme analysis', 'voice disorder', 'fluency', 'stuttering', 'AAC', 'pronunciation', 'speech recognition', 'mellifluo.us'. NOT for general audio processing, music production, or voice acting coaching without clinical context.

Data visualization and chart components for Composable Svelte. Use when creating charts, graphs, or data visualizations. Covers chart types (scatter, line, bar, area, histogram), data binding, state-driven updates, interactive features (zoom, brush, tooltips), and responsive design from @composable-svelte/charts package built with Observable Plot and D3.

Manage computer storage and clean up disk space. Use this skill when the user needs to find large files, detect duplicate files, remove unused applications, clear caches, or clean up Docker resources. Supports macOS, Windows, and Linux with platform-specific commands for storage analysis and cleanup operations.

Build and iteratively refine physics analysis specifications using analysis-specification-template.md. Use when the user asks to create or update an analysis spec, requests plots/histograms for a dataset, or describes a quick analysis task that should be formalized into a specification document.

GitLab CI/CD test job reliability analysis for OSDU projects. Tracks test job (unit/integration/acceptance) pass/fail status across pipeline runs. Use for test job status, flaky test job detection, test reliability/quality metrics, cloud provider analytics. Wraps osdu-quality CLI.

Use when the user asks to run Codex CLI (codex exec, codex resume) or references OpenAI Codex for code analysis, refactoring, or automated editing

Provides token-efficient navigation of PROJECT_INDEX.json for codebase analysis. Use when blast radius analysis, dead code detection, caller dependency analysis, or call stack tracing is needed. Mention 'blast radius', 'find callers', 'dead code', or provide file:line references to trigger. Primary consumer is AI agents requiring deterministic, minimal-token codebase navigation.

Analyze data patterns, create visualizations, and generate insights from datasets using statistical methods and data science techniques

Bayesian survival analysis models including exponential, Weibull, log-normal, and piecewise exponential hazard models with censoring support.

Automated report generator for daily, weekly, and monthly performance summaries. Creates markdown reports with trading performance, defensive wins, agent accuracy, and constitutional compliance statistics.

Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks

Probability, distributions, hypothesis testing, and statistical inference. Use for A/B testing, experimental design, or statistical validation.

Expert technical analyst for comprehensive codebase analysis and strategic implementation planning. Use when planning features, designing architecture, analyzing complex tasks, or when you need a detailed plan.md before implementation.