Topic

Context Window Compaction

Techniques for summarising or discarding parts of a model's conversation history when a session approaches the token limit of its context window.

Current clusters

build1 publisher

A nullable parentId buys Pi the entire session tree for one field

Codex made the session Item a wire type and Pi gave every entry a nullable parentId, while Claude Code squeezes the transcript in five stages. The three designs diverge on what stays addressable after compaction.

Publishers:dev.to

Reality

Evidence58
Adoption30
Hype gap+12
Incentives30
Confidence60