Show HN: Sx – an open-source package manager for AI skills, MCPs, and commands

Why sx?

Your best developers have figured out how to make AI assistants incredibly productive - custom skills, MCP configs, slash commands, proven patterns. But that knowledge is stuck on their machines.

Current workarounds don't scale:

Copy into each repo - Duplication nightmare, no central updates, version drift

- Duplication nightmare, no central updates, version drift Global config - Bloats context for projects/tasks that don't need those skills

- Bloats context for projects/tasks that don't need those skills Client plugins - Manually install each one, locked to one AI client, no bundling

sx solves this by:

Sharing expertise - Turn individual discoveries into team assets

- Turn individual discoveries into team assets Instant onboarding - New devs inherit the team's AI playbook on day one

- New devs inherit the team's AI playbook on day one Central updates - Change once in your vault, everyone gets the update

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