Master modern business analysis with AI-powered analytics, real-time dashboards, and data-driven insights. Build comprehensive KPI frameworks, predictive models, and strategic recommendations.

This skill should be used when the user asks to "intercept HTTP traffic", "modify web requests", "use Burp Suite for testing", "perform web vulnerability scanning", "test with Burp ...

Modern JavaScript/TypeScript development with Bun runtime. Covers package management, bundling, testing, and migration from Node.js. Use when working with Bun, optimizing JS/TS development speed, o...

BullMQ expert for Redis-backed job queues, background processing, and reliable async execution in Node.js/TypeScript applications. Use when: bullmq, bull queue, redis queue, background job, job queue.

Enforces Polars over Pandas for functional pipe-style data manipulation (like dplyr in R). Use when writing Python data processing code, data transformation pipelines, ETL workflows, or analytical queries—e.g., "process this CSV", "aggregate sales data", "filter and transform DataFrame", "group by and calculate metrics".

R package documentation with roxygen2 and Rd files, including mathematical notation, selective Rd parsing, and structured sections. Use when writing/updating/refactoring roxygen2 documentation, adding math formulas to R help pages, programmatically reading Rd files, or troubleshooting Rd rendering

Complex pixi task workflows and orchestration. Use when building task dependency chains, configuring caching with inputs/outputs, creating parameterized tasks, or setting up CI pipelines—e.g., "pixi task depends-on", "task caching for build automation", "multi-environment test matrices".

Provides structured code review against plans and standards. Use when a feature is complete and needs validation, when reviewing code before merge, or when assessing quality and test coverage—e.g., "finished step X", "ready for review", "validate architecture", "check quality and tests".

Production-grade Python library selection and recommendations. Use when choosing libraries for HTTP clients, CLI frameworks, data validation, structured logging, JSON serialization, terminal output, or async patterns—e.g., "which library for HTTP", "modern alternatives to requests", "pydantic vs dataclasses", "structured logging setup".

Comprehensive pixi package manager skill for all pixi operations from beginner to advanced. Use for initializing projects, managing dependencies, configuring environments, multi-environment setups, workspace composition, system requirements (CUDA/glibc), task workflows, CI/CD integration, or any pixi.toml/pyproject.toml configuration—e.g., "pixi init", "pixi add numpy", "setup multi-environment project", "configure CUDA", "monorepo workspace", "pixi.lock issues", "Docker with pixi", "GitHub Actions pixi".

Byte size parsing and formatting with pybytesize. Use when converting bytes to human-readable sizes, parsing size strings, or doing block-aligned calculations—e.g., "format 1GB as MiB", "parse '500MB'", "human readable file size".

Pytest-first Python testing with emphasis on fakes over mocks. Covers unit, integration, and async tests; fixture design; coverage setup; and debugging test failures. Use when writing tests, reviewing test quality, designing fixtures, setting up pytest, or debugging failures—e.g., "write unit tests for new feature", "fixture design patterns", "fakes vs mocks comparison", "fix failing tests".

Azure DevOps Repos-first template architecture for reusable CI pipelines. Use when designing or debugging Azure Pipelines YAML templates, splitting PR validation from post-merge main workflows while reusing one core CI template, enforcing strict compile-time/runtime variable rules, building typed template APIs (`stepList`, `jobList`, `stageList`, `templateContext`), or creating self-contained dependency-management templates for TypeScript/Python/R using bun, npm, and pixi—e.g., "one CI template for PR and main", "fix expression timing bug", "design jobList template contract".

rlang metaprogramming for tidy evaluation and non-standard evaluation (NSE) in R. Use when building data-masking APIs, wrapping dplyr/ggplot2/tidyr functions with {{ !! !!! operators, implementing quosures and dynamic dots, or designing tidyverse-style DSLs—e.g., "tidy eval wrapper function", "embrace operator usage", "NSE programming patterns", "custom select helpers".

Write production-ready one-off scripts and automation utilities with proper error handling and safety patterns. Use when developing bash automation, Python CLI tools, shell scripts, system administration scripts, or command-line batch processing—e.g., "write a script to process files", "python one-liner for data conversion", "bash automation for backups", "shell script with error handling".

Core R programming skill for all R code, package development, and data science workflows. Use when writing R functions, building packages, using tidyverse (dplyr, ggplot2, purrr), creating Shiny apps, working with R Markdown/Quarto, or doing data analysis—e.g., "write an R function", "refactor this R code", "create a Shiny dashboard", "set up package tests", "debug R errors".

R benchmarking, profiling, and performance analysis with reproducibility and measurement rigor. Use when timing R code execution, profiling with Rprof or profvis, measuring memory allocations, comparing function performance, or optimizing bottlenecks—e.g., "benchmark R function", "profvis profiling", "microbenchmark comparison", "performance analysis", "memory profiling".

Python code quality with Ruff linting/formatting and ty type checking. Use when configuring Ruff rules, setting up ty type checking, writing pyproject.toml quality config, creating pixi quality tasks, enforcing type annotations, or fixing lint errors—e.g., "set up ruff and ty", "configure Python linting", "add type checking to project", "fix ruff violations".

Guides creation, validation, and packaging of AI agent skills with token-efficient design, progressive disclosure patterns, and YAML frontmatter best practices. Use when building new skills, updating existing skills, validating skill structure against standards, or packaging for distribution—e.g., "create skill", "validate SKILL.md", "package skill for sharing", "check description format".