Lock asset pipeline to free sources

Docs/Art/AgrarianAssetPipeline.md

@@ -22,7 +22,8 @@ not look cartoonish, old-west, or exaggerated apocalypse junkyard.
 
 ## Approved Sources
 
-- Fab free assets or assets explicitly owned for this project.
+- Fab free assets. Paid Fab assets are blocked unless Nathan explicitly approves
+  the purchase in a later task.
 - Quixel/Megascans assets available under the current Epic/Unreal terms.
 - CC0/public-domain art libraries.
 - Assets created internally.
@@ -31,6 +32,16 @@ not look cartoonish, old-west, or exaggerated apocalypse junkyard.
 Do not scrape random internet images or models. If an asset cannot be traced to
 a usable license, reject it.
 
+## Free-Only Lockdown
+
+The asset pipeline is currently free-only. Before download or import, verify
+that the asset page is marked free or that the asset is project-owned/internal.
+Record the cost in `Docs/Art/AssetLicenses.md` as `Free`, `$0`, `0`, or `N/A`.
+
+Do not click purchase, checkout, add payment, subscription, or paid-license
+flows. If an asset looks useful but is not free, record it as a candidate in
+notes outside the import flow and wait for explicit approval.
+
 ## Staging Workflow
 
 1. Place downloaded/manual assets in: