X-02Context Compaction

When the window fills, compress the trajectory into a summary plus explicitly preserved state.

Key insight

Compaction is a write policy, not a summary: decide what must survive (constraints, decisions, open questions, current diffs) and preserve it verbatim — summarize only the rest.

Failure mode

Salience-based summarization drops exactly the things that matter most: user constraints and one-line facts are rarely “salient”, until they’re violated.

X-02Context Compaction

Elsewhere in the atlas