diff --git a/.planning/PROJECT.md b/.planning/PROJECT.md
index 219d5af..73d0444 100644
--- a/.planning/PROJECT.md
+++ b/.planning/PROJECT.md
@@ -80,13 +80,13 @@ Replaces spreadsheet-based gear tracking workflow.
 - **Runtime**: Bun — used as package manager and runtime
 - **Design**: Light, airy, minimalist — white/light backgrounds, lots of whitespace, no visual clutter
 - **Navigation**: Dashboard-based home page, not sidebar or top-nav tabs
-- **Scope**: No auth, single user for v1
+- **Scope**: Single user with cookie/API key auth
 
 ## Key Decisions
 
 | Decision | Rationale | Outcome |
 |----------|-----------|---------|
-| No auth for v1 | Single user, simplicity first | ✓ Good |
+| Cookie/API key auth | Single user, public read + authenticated write | ✓ Good |
 | Generic data model | Support any hobby, not just bikepacking | ✓ Good |
 | Dashboard navigation | Clean entry point, not persistent nav | ✓ Good |
 | Bun runtime | User preference | ✓ Good |