changes

fusion_accounting/fusion_accounting_core/CLAUDE.md

@@ -0,0 +1,25 @@
+# fusion_accounting_core — Cursor / Claude Context
+
+## Purpose
+Foundation for the Fusion Accounting sub-module suite. Owns:
+- Three security groups (User / Manager / Admin) shared across all sub-modules
+- Shared-field-ownership declarations on `account.move` and `account.reconcile.model`
+- Runtime Enterprise-detection helper: `env['ir.module.module']._fusion_is_enterprise_accounting_installed()`
+
+## What lives here
+- `models/account_move.py` — declares Enterprise-extension fields with identical
+  schemas / relation tables. Pure schema-preservation; no business logic.
+- `models/account_reconcile_model.py` — same pattern for `created_automatically`
+- `models/ir_module_module.py` — Enterprise-detection helpers
+- `security/fusion_accounting_security.xml` — privilege + 3 groups + auto-assignment
+
+## Critical rules
+- NEVER add business logic to the shared-field models (account_move.py here).
+  Logic belongs in the feature sub-module that owns it (e.g. fusion_accounting_bank_rec).
+- NEVER rename the relation tables for shared M2Ms. They must match Enterprise verbatim
+  for the dual-ownership pattern to work.
+- Shared fields here have NO defaults beyond what Enterprise sets. The point is preservation.
+
+## Cross-references
+- Parent design: `fusion_accounting/docs/superpowers/specs/2026-04-18-fusion-accounting-enterprise-takeover-roadmap-design.md` (Section 3)
+- Workspace conventions: `/Users/gurpreet/Github/Odoo-Modules/CLAUDE.md`