Core user knowledge organized by life domain. Each domain gets its own file: personal.md (location, family, birthday, routines, relationships), goals.md (career goals, milestones, learning targets), interests.md (hobbies, media, communities), ideology.md (political compass results, values assessments). Work context (role, company, team) lives in ui:work.context.overview, not here. UPDATE when facts emerge from conversations or service integrations. Include source attribution (e.g., "From Gmail:", "From Slack:") for automatically discovered facts. Track progress on goals when mentioned. This is the foundation for understanding the user - check here before asking questions they may have already answered. File naming: lowercase domain name (personal.md, goals.md, interests.md, ideology.md).