Production AI Patterns for Senior Engineers

Dolph is 1,015 lines of TypeScript that replace an MCP server. Here's the pattern for Bun and UV single-file scripts.

Skills load 100 tokens of metadata upfront, then instructions on-demand. Here's when to use Skills vs MCP, with working POC code.

Skills generate Excel, PowerPoint, and PDF files in minutes. Complete POC code, real token numbers, and honest failure modes for production.