500 Skills, Zero Fine-Tuning: LinkedIn's Playbook for AI Agents That Actually Know Your Codebase

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Everyone's building custom AI agents. We didn't. Instead, we built CAPTAIN — an MCP server that

makes any off-the-shelf coding agent understand LinkedIn's entire engineering stack. The secret: a

meta-tool architecture (discover → inspect → execute) and composable skills that encode tribal

knowledge as executable workflows. 500+ skills later, it's used across all of LinkedIn engineering.

I'll show you the architecture in 10 minutes and why context engineering beats model engineering

every time.

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