Issue #15: The Plugin Wars Begin — Anthropic Cowork Plugins, OpenSearch Next-Gen, Human-in-the-Loop

Issue #15 of The Agentic Engineer Podcast. Anthropic open-sources 11 knowledge-work plugins for Claude Cowork in the simplest format possible: markdown and JSON. OpenSearch Serverless Next-Gen kills the $300/mo minimum with true scale-to-zero vector search. Self-improving agents go from 25% to 86% accuracy in production. And the hot take: human-in-the-loop is a liability when users approve 93% of prompts without reading them.