Add Verstak agent project rules

AGENTS.md

@@ -1,3 +1,69 @@
+# Verstak project rules
+
+## Project identity
+
+Verstak is a local-first workbench for clients, projects, notes, files, tasks, activity and sync.
+It must remain practical, simple, and filesystem-aware.
+
+## Stack
+
+- Backend: Go
+- Storage: SQLite
+- GUI: Wails v2
+- Frontend: Svelte 4
+- Build tooling: Vite 5
+- Do not migrate to Wails v3, Svelte 5, or Vite 8 unless explicitly asked.
+
+## Architecture rules
+
+- Keep local-first behavior.
+- Do not turn the project into SaaS.
+- Do not replace SQLite with another database.
+- Do not introduce cloud storage assumptions.
+- Preserve recursive folder import semantics.
+- Preserve stable node IDs.
+- Do not duplicate nodes when moving items.
+- Do not create parallel state systems for the same entity.
+
+## UI rules
+
+- Fix GUI behavior at root cause.
+- Do not redesign the whole interface unless explicitly asked.
+- Preserve active tab state correctly.
+- Context menus must open near the cursor.
+- Drag-and-drop must show clear visual target feedback.
+- Moving nodes must never duplicate the same ID in two places.
+- Nested selection must not collapse the parent unexpectedly.
+
+## Files
+
+- File view is not a tree.
+- Sidebar shows logical hierarchy.
+- Vault filesystem layout must remain human-readable without the app.
+- Drag-and-drop folders must perform real recursive copy/move into the vault.
+- Do not fake folder support with external links.
+
+## Sync
+
+- Sync settings belong in Settings.
+- Main UI may keep only manual sync/status controls.
+- Existing URL + login/password device registration flow should be preserved unless explicitly changed.
+- Secrets must not be logged.
+
+## Verification
+
+For backend changes:
+- Run `go test ./...` if possible.
+
+For frontend changes:
+- Run the relevant frontend build/check command if available.
+- If unsure, inspect package scripts first.
+
+For GUI bugs:
+- Add targeted tests only where practical.
+- If manual GUI clicking is required and unavailable, state exact manual verification steps for the user.
+
+
 # Session summary
 
 ## Bugs fixed (this session)
@@ -82,3 +148,4 @@ go build -tags "webkit2_41 desktop production" -ldflags="-s -w" -o build/verstak
 ```bash
 go build -ldflags="-s -w" -o build/verstak-server-linux-amd64 ./cmd/verstak-server/
 ```
+