Two-tier memory model (working memory + long-term store) with a unified
user namespace across all channels. Addresses four gaps: cross-session
forgetting, compaction context loss, no proactive recall, and channel
fragmentation.
Key design decisions:
- user/working namespace written on every compaction (TTL-based expiry)
- user/profile + user/patterns as shared identity across channels
- Session-start injection before first turn (one-time, idempotent)
- Opt-in via memory.user_namespace config; default is unchanged behavior
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
William Valentin