Migration 018 adds goal/status/outcome/summary/entity_id to agent_sessions
and creates session_plan_steps + session_questions. Registers a 'task'
entity type and an 'involves' (task→entity) relationship in the ontology
so each session anchors its knowledge and involved-entity edges on the
existing relationships graph.
nomos createSession now mints a task:<session-id> entity (type task) and
links it via agent_sessions.entity_id — best-effort so chat never blocks on
it. listSessions/GET /sessions surface the new task fields.
No behaviour change yet; this is the data foundation for the task board and
live context panel. Verified end-to-end against the local stack: migration
applied, ontology ingested (60 types/47 rels), a new session mints a linked
task entity and the API returns status/goal/entity_id.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
dtoro
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