Chapter 4 / 21
Session JSONL Tree
A session is a durable tree, not a log
“Branch in place — never copy a file”
Key Source Files
core/session-manager.ts (1712)
harness/session/session.ts (359)
jsonl-storage.ts (376)
Total size ~ ~53KB
Run Demo
# Directly runnable
$ cd Pi-Agent-Site
$ npx tsx agents/s04_session_tree.ts