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Claude Code v2.1.170 → v2.1.172: nested sub-agents (5 levels deep) #379

@claude-yolo

Description

@claude-yolo

WHY this matters

Sub-agents can now spawn their own sub-agents — up to 5 levels deep. This unlocks genuinely complex multi-agent workflows that weren't possible before.

🚀 Nested agents: a sub-agent can now dispatch its own sub-agents, enabling recursive/hierarchical task decomposition in production workflows.

Other things worth knowing

  • WebFetch wildcard fix: WebFetch(domain:*.example.com) rules were silently never matching. Now fixed. If you had workarounds, you can clean them up.
  • availableModels now applies to subagents: model restrictions were being ignored for sub-agent model overrides. Fixed.
  • Bedrock region auto-detect: reads ~/.aws config files when AWS_REGION isn't set — no more manual env var for standard setups.
  • Memory recall fix: CLAUDE_MEMORY_STORES mounts weren't working in remote sessions. Fixed.
  • 1M context stuck sessions: sessions using 1M context without credits no longer get permanently stuck.

Full diff

PR: thevibeworks/claude-code-docs#1032

/cc @lroolle

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