v2.1.212

Source: Anthropic Claude Code Date: 2026-07-17 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.212

Summary

Claude Code v2.1.212 redesigns /fork to spawn background sessions instead of in-session subagents (old behavior moves to /subtask), adds session-wide caps on WebSearch calls and subagent spawns, moves long-running MCP calls to background automatically, and fixes several permission/safety bugs — notably plan mode auto-running file-modifying Bash commands without a prompt, and worktree creation via symlinks writing outside the repo.

Implications

• Coding agents: the /fork//subtask split and default resource caps (200 web searches, 200 subagents per session) mark a maturing distinction between “spin off independent work” and “delegate within a turn” — directly relevant to how this project’s own multi-agent loops are structured.
• Security: two of the fixed bugs (plan-mode Bash escaping its permission gate, symlink-based worktree creation escaping the repo boundary) are sandbox-escape-shaped issues worth noting even though patched — this class of bug recurs across agent harnesses.