diff --git a/deploy/site/Caddyfile b/deploy/site/Caddyfile
index 51db443..f8e6364 100644
--- a/deploy/site/Caddyfile
+++ b/deploy/site/Caddyfile
@@ -49,17 +49,35 @@ stream.89-167-122-160.sslip.io, stream.waow.tech {
 		}
 	}
 
-	# the archive playground: a cloudflare worker (zat.dev/strata) mounted
-	# under this host so the archive's site owns it. handle_path strips the
-	# prefix; the page uses relative urls so it needs the trailing slash.
+	# Public playground; static assets and a deploy-time summary snapshot.
+	root * /srv/site
 	redir /strata /strata/ permanent
-	handle_path /strata/* {
-		reverse_proxy https://strata.zat.dev {
-			header_up Host strata.zat.dev
+	redir /_strata-preview /strata/ permanent
+	handle_path /_strata-preview/* {
+		redir * /strata{uri} permanent
+	}
+	handle /strata/* {
+		# Preserve summary API URLs for clients of the former UI.
+		@strata_api path /strata/api /strata/api/*
+		handle @strata_api {
+			uri strip_prefix /strata
+			reverse_proxy https://strata.zat.dev {
+				header_up Host strata.zat.dev
+			}
+		}
+		handle /strata/assets/* {
+			header Cache-Control "public, max-age=31536000, immutable"
+			file_server {
+				precompressed gzip
+			}
+		}
+		handle {
+			header Cache-Control "public, max-age=60, stale-while-revalidate=86400, stale-if-error=604800"
+			file_server {
+				precompressed gzip
+			}
 		}
 	}
-
-	root * /srv/site
 	@home path / /index.html
 	handle @home {
 		header Cache-Control "no-cache"