- Sources: primary, discussion
- Summary: Claude Code v2.1.224 documents cross-session messaging, letting parallel sessions send text to each other. The documentation describes inbound controls that decide per message whether a session accepts, holds, or refuses text from another session. The same page states that an incoming peer message cannot approve a pending permission prompt, that slash commands inside message text arrive as inert text and are never executed, that the receiving session's own permission prompts still fire, and that the receiving Claude is instructed not to change permission settings or CLAUDE.md because another session asked.
- Why it matters: One session can hand a finding to another without the operator relaying it, and the documented controls keep peer text from approving actions on its own.
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