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Durable Sessions and Reconstruction in Pi

This note explains how to think about durable state in Pi when the user navigates the session tree with /tree, starts a new session, resumes another session, or forks.

The short version:

• Pi sessions are an append-only tree of entries with a movable leaf pointer.
• /tree does not restart the extension runtime. It changes the active leaf and rebuilds the active conversation context.
• If your extension keeps in-memory state, you are responsible for reconstructing it from durable session entries.
• The central design decision is whether your state should be:

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#!/bin/bash
# Sometimes you need to move your existing git repository
# to a new remote repository (/new remote origin).
# Here are a simple and quick steps that does exactly this.
#
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#
### Step 1. Make sure you have a local copy of all "old repo"
### branches and tags.