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Make Claude Code sessions talk to each other

Show HN: Make Claude Code sessions talk to each other It lets one Claude Code session ask another a question, whether that session is your own in another project or a teammates, and get the answer back. Typical use is a frontend project asking the API project how something behaves. Let me know if you find it useful.

Featured October 4, 2026Facts checked October 4, 2026Independently reviewed

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Why it's worth a peek

Make Claude Code sessions talk to each other presents itself as Show HN: Make Claude Code sessions talk to each other It lets one Claude Code session ask another a question, whether that session is your own in another project or a teammates, and get the answer back. Typical use is a frontend project asking the API project how something behaves. Let me know if you find it useful. UpPeek surfaced it for people exploring show hn.

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What you can do

Skip to content phonebook early access Quickstart
Phonebook connects running Claude Code sessions. Ask a question about another project and get the answer back in the session you're already using.
Use it between your own projects or with an approved teammate.

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What stands out

Recorded exchange · idle time shortened · plays at 1.5× speed
On narrow screens the recording is shown as a transcript. Open this page on a wider screen to play the two-pane terminal recording.
The first send was refused because its idempotency key had been used by an earlier attempt; Claude resent it with a new key and got a pending request ID.

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UpPeek selected and described this discovery independently. Inclusion does not imply a partnership or endorsement, and no unverified growth or performance result is shown.

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