⚙️ Level 4 of 4
Developer (pro)
Building the pieces everyone else installs: portable Agent Skills, MCP servers, evaluations for agent workflows and multi-agent patterns that survive a real repo.

⚙️ Developer (pro) · 9 min read
Writing One Agent Skill That Works in Several Apps
You wrote a skill, it works beautifully in one app, and then a colleague drops the same folder into a different agent and nothing happens. The file format is…

⚙️ Developer (pro) · 11 min read
Building an MCP Server: The Decisions the Spec Leaves to You
The Model Context Protocol tells you how to frame a message, declare a tool and return a result. It does not tell you how many tools to expose, what to call…
Put it into practice
Every guide links to listings you can install today: 296 apps, skills, subagents and MCP servers, mapped to the apps they work with.
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