opencode: add OAC

opencode/context/development/data/navigation.md

@@ -0,0 +1,38 @@
+<!-- Context: development/navigation | Priority: critical | Version: 1.0 | Updated: 2026-02-15 -->
+
+# Data Layer Navigation
+
+**Purpose**: Database and data access patterns
+
+**Status**: 🚧 Placeholder - Content coming soon
+
+---
+
+## Planned Structure
+
+```
+data/
+├── navigation.md
+│
+├── sql-patterns/
+│   ├── postgres-patterns.md
+│   ├── mysql-patterns.md
+│   └── query-optimization.md
+│
+├── nosql-patterns/
+│   ├── mongodb-patterns.md
+│   ├── redis-patterns.md
+│   └── dynamodb-patterns.md
+│
+└── orm-patterns/
+    ├── prisma-patterns.md
+    ├── typeorm-patterns.md
+    └── sequelize-patterns.md
+```
+
+---
+
+## Related Context
+
+- **Backend Navigation** → `../backend-navigation.md`
+- **Core Standards** → `../../core/standards/code-quality.md`