Backup before route_lib.c refactoring

.opencode/context/development/integration/navigation.md

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+# Integration Navigation
+
+**Purpose**: Connecting systems and services
+
+**Status**: 🚧 Placeholder - Content coming soon
+
+---
+
+## Planned Structure
+
+```
+integration/
+├── navigation.md
+│
+├── package-management/
+│   ├── npm-patterns.md
+│   ├── pnpm-patterns.md
+│   └── monorepo-patterns.md
+│
+├── api-integration/
+│   ├── rest-client-patterns.md
+│   ├── error-handling.md
+│   └── retry-strategies.md
+│
+└── third-party-services/
+    ├── stripe-integration.md
+    ├── sendgrid-integration.md
+    └── cloudinary-integration.md
+```
+
+---
+
+## Related Context
+
+- **Backend Navigation** → `../backend-navigation.md`
+- **API Design** → `../principles/api-design.md`