Update LLM instruction files for token efficiency and cross-repo navigation

- CLAUDE.md: reduced to single-line pointer to copilot-instructions.md (eliminates redundant auto-loaded content)
- copilot-instructions.md: added @repo name field, relative paths in own-dep-repos, SCHEMA.md first-use read, "do not re-read .md files" rule, and explicit permission to navigate external repos

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/copilot-instructions.md

@@ -1,9 +1,15 @@
 # FruitBankHybridApp — Domain Rules
 
+# own-dep-repos: "name: path" — paths are relative to this repo root (.github/..)
 @repo {
+  name = "FruitBankHybridApp"
   type = "product"
   layer = 2
-  own-dep-repos = ["AyCode.Core", "AyCode.Blazor", "Mango.Nop Libraries"]
+  own-dep-repos = [
+    "AyCode.Core: ../../../Aycode/Source/AyCode.Core",
+    "AyCode.Blazor: ../../../Aycode/Source/AyCode.Blazor",
+    "Mango.Nop Libraries: ../NopCommerce.Common/4.70/Libraries"
+  ]
 }
 
 > This is the **single source of truth** for domain rules. Do not duplicate these elsewhere.
@@ -11,6 +17,9 @@
 > For core framework rules see: `.github/copilot-instructions.md` (in AyCode.Core repo)
 > For UI framework rules see: `.github/copilot-instructions.md` (in AyCode.Blazor repo)
 > For nopCommerce library rules see: `.github/copilot-instructions.md` (in Mango.Nop Libraries repo)
+> For nopCommerce plugin (server side) rules see: `../NopCommerce.Common/4.70/Plugins/Nop.Plugin.Misc.AIPlugin/README.md` (in Mango.Nop Plugins repo)
+> On first use, read `../NopCommerce.Common/4.70/Plugins/Nop.Plugin.Misc.AIPlugin/docs/SCHEMA.md` — full TOON domain model (rule 21 prevents re-reading)
+> External repos in `own-dep-repos` are fully accessible — read their source code, docs, and `.github/copilot-instructions.md` freely when you need type definitions, base classes, or context. Do not limit yourself to the current workspace.
 
 ## Business Domain
 1. **FruitBank** = fruit & vegetable wholesaler. The server side runs as a **nopCommerce plugin** — Customer, Order, Product, GenericAttribute are nopCommerce entities.
@@ -42,3 +51,4 @@
 18. **Mango.Nop Libraries** (`../NopCommerce.Common/4.70/Libraries/`) — independent shared library with its own `.github/copilot-instructions.md` and `docs/`. Contains DTOs, entities, data access, and service base classes. DTO or entity base classes not found in this solution likely live in Libraries.
 19. **FruitBank nopCommerce Plugin** (`../NopCommerce.Common/4.70/Plugins/Nop.Plugin.Misc.AIPlugin/`) is the server-side plugin running inside nopCommerce 4.80.9. Contains SignalR hubs/endpoints, measurement services, data access (DbTable classes), admin controllers, and AI services. Server-side endpoints and services are defined here.
 20. **Documentation layering** — write `.md` documentation at the **defining layer** (where the code lives). Higher-layer `.md` files reference the base docs (e.g. `see AyCode.Core/docs/SIGNALR.md`) and document only project-specific overrides or extensions. Never duplicate base-layer descriptions in consumer-level docs.
+21. **Do not re-read .md files** already in your context window. They only change if you modify them yourself (new content is already in context) or if the developer tells you they changed — in that case re-read them once.

CLAUDE.md

@@ -1,32 +1 @@
-# FruitBankHybridApp — Claude Code Instructions
+Always read `.github/copilot-instructions.md` first — it is the single source of truth for this repo.
-
-Before writing any code, read these files:
-1. `.github/copilot-instructions.md` — Domain rules and critical pitfalls (single source of truth)
-2. `docs/GLOSSARY.md` — Domain terms, measurement logic, and common traps
-3. `docs/SCHEMA.md` — Full domain model in Toon format
-4. The relevant project's `README.md` for folder-specific context
-
-## External Repos
-
-This solution depends on external code in sibling directories. Their **full source code** is available — browse them freely for type definitions, base classes, patterns, and docs:
-
-| Repo | Path (relative to this repo root) | Contains |
-|---|---|---|
-| **AyCode.Core** | `../../../Aycode/Source/AyCode.Core/` | SignalR base classes, serialization, binary protocol, data sources, logging |
-| **AyCode.Blazor** | `../../../Aycode/Source/AyCode.Blazor/` | MgGridBase, MgGridWithInfoPanel, toolbar, layout persistence, Blazor components |
-| **Mango.Nop Libraries** | `../NopCommerce.Common/4.70/Libraries/` | Independent shared library with own `.github/copilot-instructions.md` and `docs/`. DTOs, entities, data access, service base classes |
-| **FruitBank Plugin** | `../NopCommerce.Common/4.70/Plugins/Nop.Plugin.Misc.AIPlugin/` | nopCommerce 4.80.9 server-side plugin: SignalR hubs, measurement services, DbTable classes, admin controllers, AI services |
-
-Key docs in those repos:
-- `../../../Aycode/Source/AyCode.Core/.github/copilot-instructions.md` — core framework rules
-- `../../../Aycode/Source/AyCode.Core/docs/ARCHITECTURE.md` — core architecture
-- `../../../Aycode/Source/AyCode.Blazor/.github/copilot-instructions.md` — UI framework rules
-- `../../../Aycode/Source/AyCode.Blazor/docs/MGGRID.md` — MgGrid technical reference
-- `../../../Aycode/Source/AyCode.Blazor/docs/ARCHITECTURE.md` — UI architecture
-- `../NopCommerce.Common/4.70/Libraries/.github/copilot-instructions.md` — Mango.Nop library rules
-- `../NopCommerce.Common/4.70/Libraries/docs/ARCHITECTURE.md` — library architecture + NopDependencies pattern
-- `../NopCommerce.Common/4.70/Plugins/Nop.Plugin.Misc.AIPlugin/README.md` — FruitBank plugin overview
-
-When a type is referenced but not defined in this solution, look it up in AyCode.Core, AyCode.Blazor, or the Mango.Nop Libraries. When a server-side endpoint or service is referenced, look it up in the FruitBank Plugin.
-
-When modifying code, update the corresponding README.md if it becomes out of sync with the code.