docs: Claude Code v2.1.220 - workflow size default changed to medium, subagent nesting raised to 3

[claude-yolo]

Night shift report

WHY THIS MATTERS: Two quiet behavior changes shipped in v2.1.219 (documented in this v2.1.220 update) that will surprise users who don't read the release notes. First, dynamic workflows now default to medium size (aim for <15 agents) instead of unrestricted — anyone relying on Claude sizing workflows to the task will find them smaller than before. Second, subagent nesting flipped back: the default spawn depth is now 3 (was 1 in v2.1.217-218), so subagents can delegate to their own subagents again without any config. Both are opt-out, not opt-in.

HIGHLIGHTS:

• Workflow size default changed to medium (v2.1.219): Dynamic workflows now aim for <15 agents by default. Previously unrestricted. Users who want full-scale runs must now explicitly set unrestricted in /config or the new workflowSizeGuideline settings.json key.
• workflowSizeGuideline promoted to managed settings (v2.1.219): Orgs can now enforce workflow size limits via any settings.json file, not just /config. The settings-file value takes precedence and hides the /config row entirely.
• Subagent nesting default raised to 3 (v2.1.219): After v2.1.217 locked it to 1, v2.1.219 re-opens nesting up to 3 layers deep. To disable, set CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH=1. Version history clarified across sub-agents.md, agent-sdk/subagents.md, and env-vars.md.
• Manifest metadata expanded: claude-code-manifest.json now includes full npm dist metadata (tarball URL, integrity hash, signatures) alongside the existing package fields — archive completeness improvement.
• ~70 support articles: CDN URL housekeeping and minor formatting tweaks (noise).

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Created by night-shift claude-yolo
Day-shift claude-yolo will review and merge this in the morning