pi-hostname

A Pi extension that tracks hostname context for cross-machine session sharing.

Problem

When you share Pi sessions across multiple machines (via Dropbox, Syncthing, etc.), resuming a session on a different machine can confuse the LLM because:

• File paths may differ between machines
• Installed tools and versions may vary
• Environment variables and system state are different

Solution

This extension records the hostname when a session is created. When you resume that session on a different machine, it automatically injects a context message informing the LLM about the machine change.

Installation

Via Git (once published)

pi install git:github.com/Whamp/pi-hostname

Usage

The extension works automatically:

1. When you create a new session, your hostname is recorded

2. When you resume a session (/resume) on the same machine, nothing happens

3. When you resume a session on a different machine, the LLM receives:

   System context: This session was originally created on machine "desktop". You are now on "laptop". File paths, installed tools, environment variables, and system state may differ between these machines.

Commands

• /hostname - Show the hostname where the session was created vs. current machine

How It Works

• Uses Pi's CustomEntry to store hostname in the session file
• Listens to session_start and session_switch events
• Injects a CustomMessageEntry (with display: false) when machine mismatch is detected
• The context message is hidden from the TUI but sent to the LLM

License

MIT