Reusable AI Skills, organized by what you're trying to do.
Every Skill is a portable bundle of instructions, rules, and examples that turns any AI provider into a specialist for a specific task. Install once, use across Claude, GPT, Gemini, Mistral, and Llama. No vendor lock-in, no proprietary format.
Pick the category that matches your task
Each category groups Skills by the kind of work they help with. Open a category to see the Skills inside, their compatibility ratings, and the SKILL.md for each one.
Document Creation
Structured writing, formatting, and packaging content for finished deliverables. Reports, memos, briefs, PDFs.
Data Analysis
Spreadsheets, formulas, charts, pivots, conditional formatting, and cleanup workflows. Excel and Google Sheets.
Development & Code
Scripts, generators, refactoring, code review, and debugging workflows for engineers.
Content Creation
Articles, marketing copy, SEO, long-form writing with tone control, structured citations, and voice matching.
Research & Analysis
Source verification, citation checking, literature synthesis, and research integrity workflows.
Personal Productivity
Email, notes, calendar, and meeting workflows that give you your day back.
Business Operations
Reports, outreach, contracts, and ops workflows for teams that run on process.
Web & API
API integrations, web scraping, and endpoint work for connected systems.
Design & Visual
Layouts, brand assets, and visual specifications for design-adjacent work.
Custom Workflows
Multi-step pipelines, orchestration, and specialty patterns for advanced users.
What's inside a Skill?
Every Skill is a folder containing a SKILL.md file — a plain-text specification that describes what the Skill does, what inputs it accepts, what it outputs, and the hard rules it enforces.
No proprietary format. A SKILL.md is human-readable Markdown with YAML front-matter. You can inspect it, modify it, share it. Nothing hidden.
No lock-in. The same Skill loads into Claude Desktop, OpenAI Custom GPTs, Gemini Gems, or a self-hosted setup. Swap providers without rewriting your workflow.
---
name: excel-formula-generator
version: 1.4.0
tags: [excel, formulas, data-analytics]
inputs:
- name: source_data
required: true
- name: request
required: true
outputs:
- name: formula
- name: explanation
- name: alternatives
---
## Rules
- NEVER invent column names not in source_data
- ALWAYS prefer dynamic arrays over legacy patterns
- ALWAYS explain LET-wrapped formulas step-by-stepEvery Skill in the directory ships with three guarantees.
Tested across providers
Every Skill is verified against Claude, GPT, Gemini, Mistral, and Llama before it's listed. Compatibility is reported honestly — if a Skill only works on one provider, we say so.
Rules over prompts
Skills encode hard rules (never invent values, never ship without validation) rather than soft suggestions. That's the difference between a Skill and a prompt template.
Refusals documented
When a Skill won't do something — refuses to output a rainbow color scale, refuses to auto-merge duplicates — the refusal reasoning is written into the SKILL.md. Nothing hidden.