One Skill Set, Every AI Coding Tool

ECC is a shared skill library for AI coding tools — write your instructions once and they work across Claude, Cursor, Codex, and more.

The problem it solves

If you've been experimenting with AI coding tools, you've probably noticed something frustrating: every tool has its own way of working. The instructions you carefully wrote for one don't carry over to the next. You end up starting from scratch, again and again.

ECC changes that. Think of it as a shared playbook — 243 ready-made skills covering everything from research to security to day-to-day business operations — that works identically whether your team is using Claude, Cursor, Codex, or half a dozen other tools. You set it up once. It travels with you.

The project was born at a hackathon last year and has quietly grown to over 260,000 people watching it on GitHub. This week it released a major new version, adding support for even more tools and a wave of community-contributed improvements.

Why this matters for your business

Right now, a lot of the value in AI tools lives in how well you prompt them — the specific instructions that make them useful rather than generic. ECC means that knowledge doesn't get trapped inside one tool. It becomes portable infrastructure, like a good recipe file you can take to any kitchen.

If you work with a developer or agency, ask them whether they're using a shared skill layer across the AI tools they use. It's a reasonable question, and it'll tell you something about how seriously they're thinking about this.

Words worth knowing

Harness — In AI tool talk, a harness is the environment where an AI agent actually runs and does things. Claude Code is one harness. Cursor is another. Same agent, different harness.

Skill — A pre-written set of instructions that tells an AI agent how to handle a specific type of task. Like a template, but smarter.

MCP (Model Context Protocol) — A shared standard that lets different AI tools talk to the same data sources and follow the same rules. Think of it like USB — one connector, many devices.

Agent — An AI that doesn't just answer questions but takes a sequence of actions to complete a task on your behalf.