Pattern_Archivist

Unifies (1) project pattern memory capture (ByteRover-style), (2) high-density context compression (The Archivist, 6830A1AA), and (3) RAM-only hygiene (Standard Hygiene, B4632AF3). Detects successful multi-step tool sequences and stores them as reusable Pattern artifacts; compresses long conversation/work history into clinically labeled Episode Artifacts to reduce context decay; and prunes only RAM.stream.scratch and RAM.stream.focus of completed or low-salience noise without touching WORK or LTM.