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Claude Code's cross-session messaging is a JSON file and a Unix socket

Claude Code sessions can message each other. It shipped in 2.1.224 and is properly documented , but it arrived as one changelog line with no announcement, so few people use it. I took it apart to put a Codex task on the other end. Discovery is a directory. Each session writes ~/.claude/sessions/ .j…

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  1. 2026-09-21 20:03 · r/ClaudeAI
    Claude Code's cross-session messaging is a JSON file and a Unix socket

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