id: CORE-001D
title: External Boundary and Persistence Cleanup for Decimal Unit Types
status: backlog
priority: P2
effort: M
depends_on:
  - CORE-001B
  - CORE-001C
tags: [core, decimal, persistence]
summary: Complete the remaining Decimal/unit-safe boundary cleanup after the shipped persistence seam.
acceptance_criteria:
  - Provider and cache adapter boundaries are explicit, documented, and tested.
  - Decimal-bearing JSON/API serialization expectations are documented for remaining external seams.
  - Float-heavy service entrypoints are narrowed or wrapped in named normalization adapters.
  - Remaining raw-float domain hotspots are identified or removed.
technical_notes:
  - `CORE-001D1` is complete: portfolio/workspace persistence now uses an explicit unit-aware schema with strict validation and atomic saves.
  - Remaining focus is `CORE-001D2` provider/cache normalization and `CORE-001D3` service entrypoint tightening.
  - Pre-launch policy: unit-aware schema changes may be breaking until persistence is considered live; old flat payloads may fail loudly instead of being migrated.
  - See `docs/CORE-001D_BOUNDARY_CLEANUP_PLAN.md` for the current hotspot inventory and proposed sub-slices.