diff --git a/.changeset/preact-optimize-signals.md b/.changeset/preact-optimize-signals.md
new file mode 100644
index 000000000000..d3778306bc85
--- /dev/null
+++ b/.changeset/preact-optimize-signals.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/preact': patch
+---
+
+Pre-optimizes `@preact/signals` and `preact/hooks` in the Vite dep optimizer to prevent late discovery triggering full page reloads during dev
diff --git a/packages/integrations/preact/src/index.ts b/packages/integrations/preact/src/index.ts
index 2a3c1d20e9b2..205c696c6e04 100644
--- a/packages/integrations/preact/src/index.ts
+++ b/packages/integrations/preact/src/index.ts
@@ -126,6 +126,8 @@ function configEnvironmentPlugin(compat: boolean | undefined): Plugin {
 					'@astrojs/preact/client.js',
 					'preact',
 					'preact/jsx-runtime',
+					'preact/hooks',
+					'@astrojs/preact > @preact/signals',
 				];
 			}