Anthropic ships Claude Code Mods, turning agents into a platform

On October 1, 2026, Anthropic released Claude Code v2.1.287 with Mods — JavaScript and TypeScript functions that hook into the agent's execution pipeline, intercept tool calls and render custom UI. Mods run with full user permissions, with no sandbox, signing or review, and the skills ecosystem exploded within 48 hours.

• Claude Code v2.1.287 adds Mods — TypeScript hooks in the agent pipeline
• Mods run with full user permissions: no sandbox, signing or review
• Anthropic ships four built-in mods: /diff, sec-default, telemetry and a test framework
• 10 of 15 GitHub Trending repos are agent skills or orchestration tools