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Agent Skills

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test-review

Review test quality and audit test coverage for any module. This skill should be used when reviewing existing tests, auditing test gaps, writing new tests, or when asked to assess test health. It pipelines testing standards into the audit workflow to produce a prioritized gap report. The output is a report, not code — do not write test implementations until the report is reviewed.

nickcrew
nickcrew
4114

threat-modeling-techniques

Threat modeling methodologies using STRIDE, attack trees, and risk assessment for proactive security analysis. Use when designing secure systems, conducting security reviews, or identifying potential attack vectors in applications.

nickcrew
nickcrew
4114

token-efficiency

Compressed communication using symbols and abbreviations. Use when context is limited or brevity is needed.

nickcrew
nickcrew
4114

tool-selection

Use when selecting between MCP tools based on task complexity and requirements - provides a structured selection workflow and decision rationale.

nickcrew
nickcrew
4114

tutorial-design

Design and write hands-on tutorials with progressive disclosure, exercises, and troubleshooting sections. Use when creating learning content, workshops, or step-by-step guides.

nickcrew
nickcrew
4114

typescript-advanced-patterns

Advanced TypeScript patterns for type-safe, maintainable code using sophisticated type system features. Use when building type-safe APIs, implementing complex domain models, or leveraging TypeScript's advanced type capabilities.

nickcrew
nickcrew
4114

ui-design-aesthetics

Generates high-quality, non-generic UI designs with a focus on performance, progressive disclosure, and distinctive aesthetics.

nickcrew
nickcrew
4114

user-journey-mapping

Create comprehensive user journey maps that identify pain points, opportunities, and emotional states across touchpoints. Use when mapping user experiences or analyzing conversion flows.

nickcrew
nickcrew
4114

using-git-worktrees

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

nickcrew
nickcrew
4114

using-superpowers

Use when starting any conversation - establishes mandatory workflows for finding and using skills, including using Skill tool before announcing usage, following brainstorming before coding, and creating TodoWrite todos for checklists

nickcrew
nickcrew
4114

ux-review

Multi-perspective UX review combining usability heuristics, WCAG accessibility checks, and interaction design analysis. Use when reviewing UI components before release, evaluating user flows for usability issues, conducting design critiques, or auditing accessibility compliance.

nickcrew
nickcrew
4114

verification-before-completion

Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always

nickcrew
nickcrew
4114

vibe-security

Comprehensive secure coding guide covering OWASP web vulnerabilities with prevention patterns and checklists. Use when writing or reviewing web application code to prevent XSS, CSRF, SSRF, SQL injection, access control flaws, and other common security vulnerabilities.

nickcrew
nickcrew
4114

visual-modes

Use when activating visual showcase modes (supersaiyan, kamehameha, over9000) for UI or interaction design - provides mode-specific enhancement checklists.

nickcrew
nickcrew
4114

webapp-testing

Toolkit for interacting with and testing local web applications using Playwright. Use when verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

nickcrew
nickcrew
4114

writing-plans

Structured plan-writing skill adapted from obra/superpowers. Produces actionable plans that map directly to cortex workflows and tasks.

nickcrew
nickcrew
4114

writing-skills

Use when creating new skills, editing existing skills, or verifying skills work before deployment - applies TDD to process documentation by testing with subagents before writing, iterating until bulletproof against rationalization

nickcrew
nickcrew
4114

xlsx

Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas

nickcrew
nickcrew
4114

your-skill-name

Brief description of what this skill does and provides. Use when [clear trigger condition that indicates this skill should activate]. Keep under 200 words.

nickcrew
nickcrew
4114

ai-tells-review

Use when public prose still sounds machine-written after ai-tells-scan. Complements ai-tells-scan's mechanical pass with structural judgment: rhythm, hedging, rhetorical reflexes, and performative emphasis. Trigger on 'review for AI tells,' 'does this read AI,' 'strip the AI smell,' or 'make this less AI.'

nickcrew
nickcrew
4114

ai-tells-scan

Use when writing tasks produce prose artifacts (READMEs, docs, PR text, tutorials, guides, posts, release notes) and need a fast surface scan for AI tells. Auto-engages on prose writing tasks; checks banned punctuation, stock vocabulary, and mechanical patterns. For the structural judgment pass on rhythm and rhetorical reflexes, use ai-tells-review. Not a replacement for voice skills like nick-voice; this removes machine fingerprints, it does not add a target voice.

nickcrew
nickcrew
4114

architectural-analysis

User-triggered deep architectural analysis of a codebase or scoped subtree across eight modes — information architecture, data flow, integration points, UI surfaces, interaction patterns, data model, control flow, and failure modes. This skill should be used when the user asks to "diagram this codebase," "map the architecture," "show the data flow," "give me an ERD," "trace control flow," "find the integration points," "verify the layout pattern," "audit the UX architecture," or any similar request whose primary deliverable is mermaid diagrams plus cited reports under docs/architecture/. Dispatches haiku/sonnet sub-agents in parallel for per-mode exploration, then verifies every citation mechanically before any node lands in a diagram. Not for one-off prose explanations of code (use code-explanation) or for high-level system design from scratch (use system-design).

nickcrew
nickcrew
4114

atlas-crew-tasks

Use when filing, updating, sequencing, or querying tasks in any atlas-crew repo (Facet + the Atlas Crew Security repos: Apparatus, Chimera, Crucible, Synapse, Bridge). These repos track work in GitHub Issues on Projects v2 boards, NOT backlog.md. Covers the two boards, the Type/Area/Status field model, cross-repo Initiative grouping, gh seq execution ordering, and the non-obvious gh/GraphQL mechanics for setting issue types and project fields. Trigger on: file an issue, create a task, set priority/type/area/status, add to board, what should I work on next, execution order, sequencing, blocked-by, milestone, where does this task go.

nickcrew
nickcrew
4114

atomic-commits

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nickcrew
nickcrew
4114

blog-post

Use this skill when writing blog posts, articles, or long-form web content—from quick how-to guides to in-depth opinion pieces. Trigger phrases: ''write a blog post about'', ''draft an article on'', ''create a post for my blog''. Do NOT use for academic papers, news reporting, or content requiring real-time facts.

nickcrew
nickcrew
4114

brand-library-architect

Build a complete brand library for a product — visual asset render pipeline, brand documentation set (BRAND, COPY, MANIFESTO, BIOS, FAQ, GLOSSARY, TONE, PRICING), open-source convention files (README, CONTRIBUTING, SECURITY, CODE_OF_CONDUCT), and a self-contained press kit. This skill should be used when the user asks to "build a brand library / brand kit / press kit / brand assets" for a product, "set up a brand library workflow," "create a positioning manifesto plus visual identity," or any combination of brand documentation + visual asset pipeline. Apply phase-by-phase or run end-to-end. Templates are product-agnostic and use {{TOKEN}} placeholders the skill prompts the user to fill.

nickcrew
nickcrew
4114

business-analyst

Use this skill when gathering and documenting business requirements, mapping processes, performing gap analysis, writing business requirements documents (BRDs), or modeling stakeholder impact. Trigger phrases: ''write a business requirements document'', ''map this process'', ''gather requirements for'', ''gap analysis for'', ''AS-IS TO-BE process''. Not for writing user stories (use product-manager skill), conducting user research (use ux-researcher), or financial modeling.

nickcrew
nickcrew
4114

chart-builder

Use this skill when creating data visualizations, selecting the right chart type, or generating chart code. Trigger phrases: ''build a chart'', ''visualize this data'', ''create a graph'', ''plot these numbers'', ''which chart should I use for''. Not for building interactive dashboards, designing UI components, or creating infographics with design tools like Figma.

nickcrew
nickcrew
4114

color-palette

Use this skill when creating, evaluating, or documenting color palettes for brands, products, or design systems. Trigger phrases: ''create a color palette'', ''what colors should I use'', ''brand colors for'', ''accessible color scheme''. Do NOT use for image editing, photo color correction, or print production color matching.

nickcrew
nickcrew
4114

competitor-analyst

Use this skill when analyzing competitors, building competitive positioning, creating feature comparison matrices, or applying strategic frameworks like SWOT or Porter''s Five Forces. Trigger phrases: ''analyze our competitors'', ''competitive analysis for'', ''how do we compare to'', ''create a feature matrix'', ''SWOT analysis of''. Not for sizing the total market (use market-researcher), writing pitch decks (use pitch-deck-writer), or pricing strategy modeling.

nickcrew
nickcrew
4114

copywriter

Use this skill when writing persuasive, conversion-focused copy—landing pages, product descriptions, ads, sales emails, or any content designed to move someone to action. Trigger phrases: ''write copy for my landing page'', ''describe this product'', ''write an ad for''. Do NOT use for informational content, technical documentation, or long-form editorial writing.

nickcrew
nickcrew
4114

dashboard-designer

Use this skill when designing a data dashboard—choosing KPIs, structuring layout, applying visual hierarchy, or deciding which BI tool to use. Trigger phrases: ''design a dashboard'', ''build a KPI dashboard'', ''what should my dashboard show'', ''help me layout a dashboard'', ''dashboard for monitoring''. Not for building chart code from scratch (use chart-builder), writing SQL queries (use sql-analyst), or designing marketing landing pages.

nickcrew
nickcrew
4114

dataset-curator

Use this skill when designing, cleaning, deduplicating, or documenting datasets for model training and evaluation including schema design, class imbalance handling, and train/val/test splits. Not for running model training or hyperparameter tuning. Not for real-time data pipeline engineering.

nickcrew
nickcrew
4114

decision-maker

Use this skill when you face a complex or high-stakes decision and need a structured framework to evaluate options objectively. Ideal for career choices, product prioritization, vendor selection, or any multi-criteria trade-off. Not for trivial daily decisions or situations that require licensed professional advice.

nickcrew
nickcrew
4114

design-critiquer

Use this skill when reviewing, evaluating, or giving structured feedback on UI designs, wireframes, mockups, or design systems. Trigger phrases: ''critique this design'', ''give feedback on my UI'', ''review this wireframe'', ''what''s wrong with this design''. Do NOT use for writing code, implementing designs, or marketing material critique.

nickcrew
nickcrew
4114

design-journey-review

Combined visual design and user journey review: color systems, typography, spacing, information density, visual hierarchy, workflow stages, emotional curve, friction points, and daily-use optimization. Use when evaluating how an interface looks, how it serves its user over time, and whether the design earns its space.

nickcrew
nickcrew
4114

email-drafter

Use this skill when drafting professional or personal emails—cold outreach, follow-ups, internal memos, client communication, or any message that needs to be clear and effective. Trigger phrases: ''write an email to'', ''draft a follow-up'', ''help me email''. Do NOT use for mass marketing email campaigns (use copywriter skill) or legal/formal notices requiring specific language.

nickcrew
nickcrew
4114

eval-designer

Use this skill when building evaluation frameworks to measure LLM quality, safety, accuracy, or alignment including test suites, human eval rubrics, automated evals, and metrics design. Not for training or fine-tuning models. Not for dataset curation or benchmark comparison across publicly available models.

nickcrew
nickcrew
4114

fact-checker

Use this skill when verifying factual claims, checking accuracy of statements, or assessing the credibility of information. Trigger phrases: ''fact-check this'', ''is this true'', ''verify this claim'', ''check if this is accurate''. Do NOT use for subjective opinions, legal or medical advice, or claims requiring real-time data or breaking news.

nickcrew
nickcrew
4114

frontend-design

Use this skill when specifying, designing, or documenting UI components, layouts, and design systems for frontend implementation. Trigger phrases: ''design this UI component'', ''create a responsive layout'', ''spec the CSS for'', ''design system for''. Do NOT use for backend development, server-side logic, data engineering, or writing server code.

nickcrew
nickcrew
4114

html-seo-review

Audit static HTML files for on-page SEO, content quality, easy-win performance signals, and crawlability. This skill should be used when the user asks to review, audit, or check the SEO of one or more static HTML files — e.g., "review the HTML for SEO issues", "audit this landing page", "check SEO on these pages before I publish". Static HTML only — does not cover Jekyll/Hugo/Astro/Next.js source, off-page factors, or live-rendered Core Web Vitals.

nickcrew
nickcrew
4114

justfile-author

Use this skill when authoring or refactoring a justfile (and matching Makefile wrapper) for one of Nick's projects. Triggers when the user asks to "create a justfile", "add a justfile to this project", "set up just for…", "wire up tmux services", "scaffold the task runner", or when working in a repo that lacks a justfile but obviously needs one. Produces a justfile using zsh syntax with the standard svc-* tmux service family, the canonical build/lint/dev/test recipes, a thin Makefile passthrough wrapper that auto-installs just, and per-service tx-start.sh helpers. Do NOT use for editing existing third-party justfiles or non-Nick projects unless the user explicitly opts in.

nickcrew
nickcrew
4114

knowledge-stack

Use this skill whenever working inside any of Nick's repos (under ~/Developer/) or whenever a conversation touches Nick's durable cross-cutting work — Atlas Crew product strategy/brand/planning, the Unanet job, job search, interviews, tax amendment, foreclosure/tenant situation, strategic positioning. Maps Nick's three Basic Memory projects (products, work, main) and the per-repo dev trackers, and says which layer owns which kind of question. Consult before reasoning from stored memory summaries about repo architecture, product decisions, active priorities, or ongoing personal/career state — stored memory is lossy; the trackers and the Basic Memory projects are the real artifacts and should be consulted first.

nickcrew
nickcrew
4114

mapping-suite

User-triggered orchestrator that walks the user through running multiple sibling mapping/audit/doc skills against a shared scope, then assembles their outputs into one navigable artifact. Coaches rather than auto-runs — at each step the orchestrator presents the next sibling skill, recommended scope inheritance, and approval gate; the user invokes the sibling and confirms before moving on. Resolves the prior arch-analysis lookup once at suite start so every sibling skill inherits the same scope. Records each run's output path in a suite manifest. Produces a combined navigation HTML that links to each sibling's standalone HTML for one-stop sharing. Ships two named recipes — "release-driver onboarding" (for tooling that drives releases) and "deployed-system onboarding" (for systems that get deployed) — and supports custom plans. Trigger on "run our mapping suite," "do a complete onboarding," "build the combined report," "I need to onboard to system X," "give me the full picture of this codebase," or when the user names two-or-more sibling analyses to coordinate. Not for running a single sibling skill in isolation (invoke it directly), and not for bypassing approval gates (this skill coaches, never autoruns).

nickcrew
nickcrew
4114

market-researcher

Use this skill when sizing a market, analyzing competitors, designing customer surveys, segmenting audiences, or synthesizing research into market insights. Trigger phrases: ''size the market for'', ''analyze our competitors'', ''who is our target customer'', ''design a survey to understand'', ''TAM/SAM/SOM for''. Not for building financial models, writing pitch decks, or conducting UX usability research.

nickcrew
nickcrew
4114

model-comparator

Use this skill when comparing AI or LLM models on benchmarks, capability, cost, latency, context window, or task-specific fit to help teams select the right model for their use case and budget. Not for training or fine-tuning models. Not for building eval frameworks from scratch.

nickcrew
nickcrew
4114

multi-specialist-review

User-triggered multi-agent code review. Spawns 3-5 parallel specialist sub-agents that read actual source files, runs mechanical citation verification, and synthesizes a single review artifact. Use for PR-level changes, multi-commit ranges, or security-sensitive work where single-turn review is insufficient.

nickcrew
nickcrew
4114

product-manager

Use this skill when writing product requirements documents, prioritizing features, creating user stories, defining acceptance criteria, or setting product metrics. Trigger phrases: ''write a PRD for'', ''prioritize this feature backlog'', ''write user stories for'', ''help me define acceptance criteria'', ''what metrics should we track for''. Not for writing code, designing UI mockups, or conducting user research interviews.

nickcrew
nickcrew
4114

proofreader

Use this skill when reviewing written content for grammar, spelling, punctuation, style consistency, and tone—before publishing, submitting, or sending. Trigger phrases: ''proofread this'', ''check my writing'', ''review this for errors'', ''edit this email/report/essay''. Do NOT use when structural rewrites or content changes are needed—proofreading fixes surface errors, not substantive problems.

nickcrew
nickcrew
4114

regex-master

Use this skill when building, explaining, or debugging regular expressions for pattern matching, validation, or text extraction. Trigger phrases: ''write a regex'', ''match this pattern'', ''validate this format'', ''extract from text''. Not for natural language parsing or full grammar parsing (use a parser instead).

nickcrew
nickcrew
4114

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Adoption

Agent Skills are supported by leading AI development tools.

FAQ

Frequently asked questions about Agent Skills.

01

What are Agent Skills?

Agent Skills are reusable, production-ready capability packs for AI agents. Each skill lives in its own folder and is described by a SKILL.md file with metadata and instructions.

02

What does this agent-skills.md site do?

Agent Skills is a curated directory that indexes skill repositories and lets you browse, preview, and download skills in a consistent format.

03

Where are skills stored in a repo?

By default, the site scans the skills/ folder. You can also submit a URL that points directly to a specific skills folder.

04

What is required inside SKILL.md?

SKILL.md must include YAML frontmatter with at least name and description. The body contains the actual guidance and steps for the agent.

05

How can I submit a repo?

Click Submit in the header and paste a GitHub URL that points to a skills folder. We’ll parse it and add any valid skills to the directory.