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By agent · Claude Code

Claude Code skills: 1068 worth installing

Skills in the open SKILL.md format that Claude Code reads. Each one has a plain-language summary and the command to install it.

Installing a skill in Claude Code

$ npx skills add <author>/<skill>

Replace the placeholder with the author and skill name from the skill's page. Start a new Claude Code session afterwards so the skill is picked up.

Skills for Claude Code

All skills

SEO Audit

Corey Haines

Audits a site for SEO problems across technical SEO, on-page elements and meta tags, and explains why pages are not ranking.

Marketing and SEOGitHub stars: 52.1kInstalls: 218k

Signup Flow CRO

Corey Haines

Optimises signup, registration and trial activation flows to reduce friction and raise conversions.

Marketing and SEOGitHub stars: 52.1kInstalls: 61.8k

Site Architecture

Corey Haines

Plans or restructures a website's page hierarchy, navigation, URL structure and internal linking.

Marketing and SEOGitHub stars: 52.1kInstalls: 111k

SMS

Corey Haines

Plans and builds SMS and MMS marketing: welcome flows, abandoned cart texts, win-back, promotional and transactional messages.

Marketing and SEOGitHub stars: 52.1kInstalls: 54.6k

Social Content

Corey Haines

Creates and optimises social media content for LinkedIn, X, Instagram, TikTok and Facebook, and handles social listening.

Marketing and SEOGitHub stars: 52.1kInstalls: 70.3k

Marketing Video

Corey Haines

Produces marketing video with AI tools and programmatic frameworks such as Remotion, Hyperframes, HeyGen and Veo.

Video and mediaGitHub stars: 52.1kInstalls: 75k

Defuddle

Steph Ango

Extracts clean Markdown from HTML pages with the Defuddle CLI.

DataGitHub stars: 49.1kInstalls: 70.7k

JSON Canvas

Steph Ango

Creates and edits JSON Canvas files (.canvas) with nodes, edges and groups, for visual canvases and mind maps in Obsidian.

ProductivityGitHub stars: 49.1kInstalls: 70.9k

Knap

Steph Ango

Renders Markdown notes from templates and structured data such as JSON or CSV with the Knap CLI.

ProductivityGitHub stars: 49.1kInstalls: 2.1k

Obsidian Bases

Steph Ango

Creates and edits Obsidian Bases (.base files) with views, filters, formulas and summaries.

ProductivityGitHub stars: 49.1kInstalls: 76k

Obsidian CLI

Steph Ango

Reads, creates, searches and manages notes in an Obsidian vault through the Obsidian CLI, and helps with plugin development.

ProductivityGitHub stars: 49.1kInstalls: 77.2k

Writes Obsidian Flavored Markdown with wikilinks, embeds, callouts and properties.

WritingGitHub stars: 49.1kInstalls: 88.2k

Biopython

K-Dense

Molecular biology toolkit: sequence manipulation, FASTA, GenBank and PDB parsing, phylogenetics and NCBI access.

DataGitHub stars: 47.3kInstalls: 1.7k

Searches OpenAlex, PubMed and Google Scholar for papers, validates citations and generates BibTeX entries.

ResearchGitHub stars: 47.3kInstalls: 1.9k

Designs experiments and studies before data collection: choice of design, randomisation, blocking and treatment layout.

ResearchGitHub stars: 47.3kInstalls: 1.1k

Runs exploratory analysis on scientific data files: profiles, missing-data audits and outlier checks.

DataGitHub stars: 47.3kInstalls: 1.9k

Turns observations into testable scientific hypotheses with rival explanations, predictions and an analysis plan.

ResearchGitHub stars: 47.3kInstalls: 1.8k

Creates research posters in LaTeX with beamerposter, tikzposter or baposter.

DocumentsGitHub stars: 47.3kInstalls: 1.8k

Literature Review

K-DenseAudit warning

Conducts systematic literature reviews across PubMed, arXiv, bioRxiv, Semantic Scholar and other academic databases.

ResearchGitHub stars: 47.3kInstalls: 2k

Builds market research reports with traceable evidence, competitive landscapes and TAM, SAM and SOM sizing.

ResearchGitHub stars: 47.3kInstalls: 1.7k

MarkItDown

K-Dense

Converts Office files, PDFs and other documents to Markdown with Microsoft MarkItDown, for analysis and RAG ingestion.

DocumentsGitHub stars: 47.3kInstalls: 1.9k

Matplotlib

K-Dense

Reference for Matplotlib: fine-grained control over plot elements and export to PNG, PDF or SVG for publication.

DataGitHub stars: 47.3kInstalls: 1.9k

NetworkX

K-Dense

Creates, analyses and visualises networks and graphs in Python with NetworkX.

DataGitHub stars: 47.3kInstalls: 1.8k

Prepares constructive peer-review drafts and structured assessments of scientific manuscripts and proposals.

ResearchGitHub stars: 47.3kInstalls: 1.9k

Questions

Claude Code and skills.

What is a Claude Code skill?

A folder with a SKILL.md file: instructions, and sometimes scripts and reference files, that Claude Code loads when a task calls for them.

How do I install a skill in Claude Code?

Each skill page has an install command. Run it in a terminal, then start a new Claude Code session so the skill is picked up.

What is the difference between a skill and an instructions file such as AGENTS.md?

An instructions file is loaded in every session and describes the project. A skill is loaded only when a task calls for it, so it can be long and specific without costing context on every turn.

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