Claude Code June changelog: plugin management, version pinning, and richer subagent feedback

Releasebot (Claude Code changelog)·medium signal

Anthropic's June Claude Code updates add a /plugin list command (with --enabled/--disabled filters), requiredMinimumVersion/requiredMaximumVersion managed settings that refuse to start outside an allowed range, and Stop/SubagentStop hooks that can return hookSpecificOutput.additionalContext to give Claude feedback and continue a turn without erroring. Skills also gained an escape syntax for a literal $ before a digit. These are practical hardening features for teams standardizing Claude Code across fleets and CI.