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AGENTS.md

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+# SD‑Dash Monorepo
+
+This repository is a **monorepo** with two main packages that can be built and run independently.
+
+## Directory Structure
+
+```
+├── frontend/        # Client‑side TypeScript application
+├── backend/         # Server‑side Go micro‑service
+├── .envrc, flake.nix, README.md
+└── …
+```
+
+## Package Details
+
+See package‑specific instructions:
+
+- **frontend/** - `@frontend/AGENTS.md`
+- **backend/** - `@backend/AGENTS.md`