Claude Code 2.1.x lands practical speedups and governed multi‑agent workflows
Anthropic pushed a rapid series of Claude Code 2.1 updates (v2.1.26–v2.1.31) that cut RAM on session resume, add page‑level PDF reads, support MCP servers without dynamic registration, enable PR‑based session bootstraps, and ship many reliability fixes [Reddit summary](https://www.reddit.com/r/ClaudeAI/comments/1qvgdc5/claude_code_v21262130_what_changed/)[^1] and [official v2.1.31 notes](https://github.com/anthropics/claude-code/releases/tag/v2.1.31)[^2]. Practitioners also highlight 2.1’s skill hot‑reload, lifecycle hooks, and forked sub‑agents as a foundation for governed, observable multi‑agent workflows—positioning Claude Code as a lightweight "agent OS" for real projects [deep dive](https://medium.com/@richardhightower/build-agent-skills-faster-with-claude-code-2-1-release-6d821d5b8179)[^3]. [^1]: Adds: community changelog for v2.1.26–30 covering performance, MCP, GitHub/PR workflows, and PDF handling. [^2]: Adds: official v2.1.31 fixes (PDF lockups, sandbox FS errors, streaming temperature override, tool routing prompts, provider labels) and hard limits (100 pages, 20MB). [^3]: Adds: perspective on skill hot‑reload, lifecycle hooks, and forked sub‑agents enabling governed multi‑agent patterns.