Session Compression History
Domain: Sessions & Profiles
Motivation
When a session is compressed, the old messages are replaced by a summary. The summary is part of the conversation history.
Concrete Example
Session: 200 messages (100K tokens). Compression: summarizes first 150 messages into 5K tokens. Now: summary + 50 recent messages = 30K tokens. More room.
Analogy
A meeting summary - instead of 2 hours of transcript, you have a 1-page summary. Compression history replaces old messages with summaries.