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Agent Skills

Agent-Skills.md is a agent skills marketplace, to find the right agent skills for you.

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sharing-skills

Use when you've developed a broadly useful skill and want to contribute it upstream via pull request - guides process of branching, committing, pushing, and creating PR to contribute skills back to upstream repository

NickCrew
NickCrew
2212

session-management

Use when loading, saving, or reflecting on session context - provides structured workflows for session lifecycle management and reflection outputs.

NickCrew
NickCrew
2212

security-testing-patterns

Security testing patterns including SAST, DAST, penetration testing, and vulnerability assessment techniques. Use when implementing security testing pipelines, conducting security audits, or validating application security controls.

NickCrew
NickCrew
2212

secure-coding-practices

Secure coding practices and defensive programming patterns for building security-first applications. Use when implementing authentication, handling user input, managing sensitive data, or conducting secure code reviews.

NickCrew
NickCrew
2212

root-cause-tracing

Use when errors occur deep in execution and you need to trace back to find the original trigger - systematically traces bugs backward through call stack, adding instrumentation when needed, to identify source of invalid data or incorrect behavior

NickCrew
NickCrew
2212

research-methodology

Structured research using sophisticated query design, source vetting, and synthesis techniques. Use when conducting competitive analysis, market scans, historical investigations, or trend research.

NickCrew
NickCrew
2212

requirements-discovery

Stakeholder interviews, PRD structure, and scope definition for software requirements elicitation. Use when gathering requirements, defining project scope, or structuring product requirement documents.

NickCrew
NickCrew
2212

requesting-code-review

Use when completing tasks, implementing major features, or before merging to verify work meets requirements - dispatches code-reviewer subagent to review implementation against plan or requirements before proceeding

NickCrew
NickCrew
2212

repo-cleanup

Use when a repository needs cleanup of dead code, build artifacts, unused dependencies, outdated docs, or stale tests - provides safe cleanup workflows, validation steps, and reporting templates for code, deps, docs, tests, and sprint archives.

NickCrew
NickCrew
2212

release-prep

Use when preparing a production release or release candidate - provides a checklist-driven workflow for validation, versioning, build optimization, documentation updates, and deployment readiness.

NickCrew
NickCrew
2212

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
2212

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
2212

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
2212

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
2212

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
2212

release-analysis

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NickCrew
NickCrew
2212

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
2212

cortex-skills-loop

Drives the cortex skills recommend-feedback-rate loop. Use when a context change occurs (new file types, domain shift, task pivot) or when a task completes and skill effectiveness should be recorded.

NickCrew
NickCrew
2212

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
2212

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
2212

doc-health-audit

Orchestrate a full documentation health audit across five dimensions: structural health, semantic accuracy, topic completeness, prose quality, and information architecture. Runs each phase in dependency order with phase gating. This skill should be used for pre-release audits, periodic health checks, or comprehensive documentation assessments.

NickCrew
NickCrew
2212

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
2212

doc-architecture-review

Evaluate documentation information architecture: navigation paths, discoverability, progressive disclosure, cross-linking, and mental model alignment. This skill should be used when restructuring docs, adding new sections, or when users report difficulty finding information.

NickCrew
NickCrew
2212

doc-completeness-audit

Audit documentation completeness by mapping what a doc set should cover against what it actually covers. Produces a prioritized gap report by topic, not just by file. This skill should be used after shipping features, before releases, or when users report missing documentation.

NickCrew
NickCrew
2212

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
2212

wiring-audit

User-triggered audit that finds wiring drift between a project's UI surfaces and backend capabilities — orphan surfaces (UI calls endpoints/hooks/procedures that no longer exist), unwired capabilities (backend routes/exports that nothing surfaces), shape drift (both exist but contracts mismatch), method drift (URL matches, HTTP verb does not), validation drift (frontend vs backend rules diverged), permission drift (UI exposes what backend forbids or vice versa), stale labels (UI text references renamed backend concepts), and unsurfaced configuration (env vars or flags that gate behavior with no UI or CLI to control them). This skill should be used when the user asks to "audit our wiring," "find UI/backend drift," "find unwired capabilities," "find stale surfaces," "check for contract violations," "find unused endpoints," "find unused hooks," "what mismatches between UI and backend," or any similar request whose deliverable is a prioritized findings report rather than a descriptive snapshot. Generic across UI frameworks but optimized for React applications (hooks, fetch, react-query, SWR, tRPC, server actions, react-router, Next.js). Not for descriptive architectural snapshots (use architectural-analysis), security audits (use security-auditor), or performance audits (use the performance-optimization skills).

NickCrew
NickCrew
2212

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
2212

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
2212

doc-quality-review

Assess documentation quality across readability, consistency, audience fit, and prose clarity. Produces a scored review with actionable findings. This skill should be used before releases, during doc reviews, or when documentation feels unclear or inconsistent.

NickCrew
NickCrew
2212

storyteller

Use this skill when writing fiction, narrative nonfiction, brand stories, or any content where emotional engagement and narrative arc matter more than pure information delivery. Trigger phrases: ''write a short story'', ''tell my brand''s origin story'', ''write a narrative about'', ''create a character''. Do NOT use for purely informational content, technical writing, or persuasive copy without a narrative component.

NickCrew
NickCrew
2212

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
2212

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
2212

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
2212

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
2212

template-skill-enhanced

Enhanced skill template with progressive disclosure, bundled resources, and quality rubrics. Use when creating new skills that need structured tiers, reference files, validation rubrics, or advanced bundling patterns beyond the basic template.

NickCrew
NickCrew
2212

terms-of-service

Use this skill when you need to draft Terms of Service, a Privacy Policy, or an End-User License Agreement (EULA) for a web application, SaaS product, or mobile app. Produces comprehensive, plain-English legal documents that cover user rights, data practices, liability limits, and dispute resolution. Not a substitute for a licensed attorney; have a lawyer review before publishing for a production product.

NickCrew
NickCrew
2212

ui-ux-review-suite

User-triggered orchestrator that runs a comprehensive UI/UX review by coaching the user through four sibling skills as distinct lenses against one shared target, then synthesizing their findings into a single prioritized report. Composes user-journey-mapping (flow/funnel lens), ui-design-aesthetics (visual critique lens), interaction-design (state-coverage lens), and ux-review (usability-heuristics + WCAG lens). Resolves the review target once at suite start — the app/URL, the screens or flows under review, the viewports, and the user persona/goal — so every lens inherits the same scope and captured screenshots. Coaches rather than auto-runs — at each step it presents the next lens with its reframing prompt and an approval gate; the user invokes the sibling and confirms before moving on. Because the lenses overlap (ux-review already touches interaction and a11y), the suite scopes each lens to its distinct concern so the synthesis does not double-count. Produces one authored synthesis report — deduped findings grouped by severity and lens — not a navigation shell. Trigger on "run a full UX review," "comprehensive UI/UX review," "review this screen across all lenses," "do a complete design review," or when the user names two-or-more UI/UX lenses to coordinate. Not for running a single lens in isolation (invoke it directly), not for generating new UI (the generative siblings are reframed as critique here), and not for bypassing approval gates (this skill coaches, never autoruns).

NickCrew
NickCrew
2212

ux-interaction-review

Combined UX and interaction design review: usability heuristics, state coverage, feedback patterns, timing, keyboard behavior, error recovery, and progressive disclosure. Use when reviewing how an interface works mechanically and whether interactions are well-designed for use.

NickCrew
NickCrew
2212

web-researcher

Use this skill when you need to research a topic online, gather information from multiple sources, or evaluate source credibility. Trigger phrases: ''research'', ''find information about'', ''look up'', ''investigate''. Not for academic systematic reviews (use literature-reviewer) or fact-checking specific claims (use fact-checker).

NickCrew
NickCrew
2212

ux-writer

Use this skill when crafting microcopy, UI text, or in-product writing—error messages, tooltips, button labels, empty states, onboarding flows, and confirmation dialogs. Trigger phrases: ''write microcopy for'', ''write UI copy'', ''write error messages'', ''write onboarding text'', ''button label for''. Do NOT use for marketing copy (use copywriter) or long-form documentation (use technical-writer).

NickCrew
NickCrew
2212

ux-researcher

Use this skill when planning or conducting user research, writing interview guides, designing surveys for UX insights, synthesizing qualitative findings, creating personas, or writing research reports. Trigger phrases: ''write a user interview guide'', ''how do I conduct usability testing'', ''synthesize research findings'', ''create a user persona'', ''design a UX survey''. Not for quantitative market sizing (use market-researcher), writing business requirements (use business-analyst), or product analytics.

NickCrew
NickCrew
2212

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
2212

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
2212

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
2212

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
2212

atomic-commits

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NickCrew
NickCrew
2212

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
2212

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
2212

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
2212

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
2212

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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.