Show HN: Make Claude Code sessions talk to each other

Category: ai-ml

Tags: ai-agents, claude-code, multi-agent, developer-tools, cli

Score: 6.0/10 (Innovation: 7, Technical: 6, Documentation: 7, Utility: 5)

Phonebook enables separate Claude Code sessions running in different repositories to communicate with each other via an 'agent-phonebook' CLI, allowing one project's agent to answer questions about its codebase on demand. It is interesting as an early exploration of multi-agent collaboration and cross-repo context sharing, with explicit sender approvals and a public topic directory.

Target audience: backend devs and AI-assisted developers using Claude Code across multiple projects

Repository: https://phonebook.dev/

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