Phonebook – make Claude Code sessions talk to each other
Connects running Claude Code sessions across repos and projects: ask a question about another project and get the answer back inside the session you are already using, via an approved ask_phonebook tool call.
Why it matters
Cross-repo agent communication without copy-paste — one session queries another project's agent directly, approved by hand each time.
What you could build with it
A small dev team could connect the Claude Code sessions running in each of their repos so one session can ask another about API semantics or retry behavior; the concrete result is cross-repo answers without context-switching or copying code between chats.
Does it hold up?
Too early to judge — in early access with only a recorded demo (two-pane terminal exchange at 1.5x speed) on the site so far. Every tool call in the recorded exchange was approved by hand, and sessions register to answer questions from the owner's other sessions.
Learn more
product walkthrough with recorded exchange →
First spotted on article: source.
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