Extracted from ../entities/codes.md.
- v0.2 — BR-review decisions locked (Batch D). Scope restricted to Items/Resources only; no Tenders or Estimates in v1. Workbench sync: one-time migration + on-demand refresh only. Custom Code creation: Admin-only (Leads manage option assignments). Bulk Code assignment: allowed in UI. Updated BR-125, BR-128, validation rules, admin workflows. Open items consolidated; 4 decisions marked resolved.
- v0.1 — initial draft (Batch C). Mirrors Item and Resource entity spec structure. Consolidates rules from business-rules.md §3.13 (BR-125–128), glossary §8, domain-model Code entry, and migration-benchmark.md §3.8–3.9 (Benchmark activity + cost_code mapping). Includes two worked examples (Workcentre Items, Activity Code Resources), validation invariants, admin workflows, and migration path. Phase: Alpha. Status: 🟡 Working.