Improved compaction

Auto-compaction in 1.0 uses checkpoint-based session persistence, replacing the previous fixed-threshold summarization with a structured approach that retains task-level awareness across restarts.

When context approaches the compaction threshold:

1. The agent generates a structured LLM summary covering: tasks completed, files modified, key decisions made, and next steps.
2. The summary is persisted as a session checkpoint in the IDE's internal session storage (managed by the IDE, not written to your project directory).
3. On next session load, only the summary is read — not the full conversation history. This makes restarts fast regardless of session length.

Use /compact in the chat input to trigger compaction at any point. Useful if a session is large and responses feel slow. The summary includes the same structured content as auto-compaction.

Compaction is one-way — the full conversation history before the checkpoint is not recoverable within the session. Export your session before manual compaction if you need to preserve full history.

For how compaction works across all surfaces, see Compaction.