diff --git a/AGENTS.md b/AGENTS.md
index e7b0305..780dcc1 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,6 +11,8 @@ PRD: `docs/PRODUCT.md` for destination and field names. Do not implement Milesto
 Capture.
 Acceptance: on a phone, one real slab, approved mask, approved length-axis rectangle, user length and thickness, inventory PNG on screen, widths and board feet on screen.
 
+Milestone 1 is inference-free. Background removal, rectangle, measurements, and PNG encode run in the browser as ordinary code. There is no inference URL and no model call in this milestone.
+
 ## Invariants
 
 - Quantity per listing is one.