pub const OBJECT_SCHEMA_VERSION: i64 = 4;Expand description
user_version value stamped into objects.db after run_object_schema.
The flat schema reset the counter to 1 (the pre-flatten chain never set
user_version, so legacy files read 0). Bumped per additive migration:
v1 — flat schema baseline
v2 — db_agent_definitions.updated_at
v3 — db_agent_definitions.user_hidden (Phase 2 hide templates,
SPEC_AGENT_PICKER_TWO_TIER_2026_05_24.md Q2 Decision Y)
v4 — db_agents consolidation table (Phase 3a; dual-write only,
reads still on db_agent_definitions / db_agent_instances)