Memory

Agent Nine remembers important context across your conversation.

Session Memory

As you work, Agent Nine automatically extracts key facts:

• Files you've modified
• Decisions you've made
• Architecture patterns discovered
• Errors encountered and resolved

This happens in the background — you don't need to do anything.

Context Compaction

When a conversation gets too long for the AI's context window, Agent Nine compacts it:

1. Smart summary — Uses extracted facts as a summary (instant, instant)
2. AI summarization — AI summarizes old messages, keeping recent ones
3. File restoration — Recently read files are re-injected after compaction

You can manually compact with:

/compact

What's Preserved After Compaction

• All file paths mentioned
• Key decisions and their rationale
• Current task state
• Errors and resolutions
• Your original request
• Recently accessed file contents (top 5)
• Active plan (if in plan mode)

What's Lost

• Exact wording of old messages
• Intermediate thinking steps
• Old tool outputs (grep results, command outputs)