v2.1.147

Source: Anthropic Claude Code Date: 2026-05-21 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.147

Summary

Claude Code v2.1.147 introduces the Workflow tool for deterministic multi-agent orchestration (off by default, CLAUDE_CODE_WORKFLOWS=1), renames /simplify to /code-review with effort levels and --comment for inline GitHub PR comments, and adds pinned background session management. 30+ bug fixes target Windows/PowerShell, background sessions, auto mode, and plugin stability.

Implications

• Agent orchestration thread: The Workflow tool is a new primitive for deterministic multi-agent coordination — distinct from the existing subagent/team model. Adds a structured, repeatable orchestration layer alongside the probabilistic agent model.
• Code review thread: /code-review with effort levels and PR commenting positions Claude Code as a standalone code review tool, competing directly with Cursor Bugbot’s configurable effort model.
• Background agent reliability: Pinned sessions, memory-pressure shedding, and fixes for re-prompting permissions and worktree cleanup continue the background agent hardening arc from v2.1.143-144.