Prompt

Picks low, medium or high effort for each prompt, keeping the prompt cache warm

Band above the prompt with model, effort, context fill, rate-limit windows and session cost, cache state

Compacts an idle session with a large context just before its prompt cache expires, while the summary still reads from cache

A repo's memory/ folder, shared through git: a Haiku agent reads it and returns only what the task needs, another one compacts it

Keeps a ledger of what output-trimmer, subagent-router and auto-effort save, shown by /savings