diff --git a/renderers/react/package-lock.json b/renderers/react/package-lock.json
index 68d1059ca..81736fb07 100644
--- a/renderers/react/package-lock.json
+++ b/renderers/react/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.8.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@a2ui/web_core": "^0.8.0",
+        "@a2ui/web_core": ">=0.8.0 <0.8.4",
         "clsx": "^2.1.0",
         "markdown-it": "^14.0.0"
       },
diff --git a/renderers/react/package.json b/renderers/react/package.json
index 921eeca17..72559c0cb 100644
--- a/renderers/react/package.json
+++ b/renderers/react/package.json
@@ -48,7 +48,7 @@
     "clean": "rm -rf dist"
   },
   "dependencies": {
-    "@a2ui/web_core": "^0.8.0",
+    "@a2ui/web_core": ">=0.8.0 <0.8.4",
     "clsx": "^2.1.0",
     "markdown-it": "^14.0.0"
   },
diff --git a/renderers/react/visual-parity/package-lock.json b/renderers/react/visual-parity/package-lock.json
index 5ce8c4949..3b197b3ac 100644
--- a/renderers/react/visual-parity/package-lock.json
+++ b/renderers/react/visual-parity/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.8.0",
       "dependencies": {
         "@a2ui/lit": "file:../../lit",
-        "@a2ui/markdown-it": "^0.0.1",
+        "@a2ui/markdown-it": "file:../../markdown/markdown-it",
         "@a2ui/react": "file:..",
         "@lit/context": "^1.1.0",
         "lit": "^3.1.0",
@@ -51,6 +51,7 @@
         "eslint-config-prettier": "^10.0.0",
         "eslint-plugin-react": "^7.37.0",
         "eslint-plugin-react-hooks": "^5.0.0",
+        "gts": "^7.0.0",
         "jsdom": "^28.0.0",
         "prettier": "^3.4.0",
         "react": "^18.3.0",
@@ -70,7 +71,7 @@
     },
     "../../lit": {
       "name": "@a2ui/lit",
-      "version": "0.8.1",
+      "version": "0.8.2",
       "license": "Apache-2.0",
       "dependencies": {
         "@a2ui/web_core": "file:../web_core",
@@ -86,6 +87,29 @@
         "wireit": "^0.15.0-pre.2"
       }
     },
+    "../../markdown/markdown-it": {
+      "name": "@a2ui/markdown-it",
+      "version": "0.0.2",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "dompurify": "^3.3.1",
+        "markdown-it": "^14.1.0"
+      },
+      "devDependencies": {
+        "@a2ui/web_core": "file:../../web_core",
+        "@types/dompurify": "^3.0.5",
+        "@types/jsdom": "^28.0.0",
+        "@types/markdown-it": "^14.1.2",
+        "@types/node": "^24.10.1",
+        "jsdom": "^28.1.0",
+        "prettier": "^3.4.2",
+        "typescript": "^5.8.3",
+        "wireit": "^0.15.0-pre.2"
+      },
+      "peerDependencies": {
+        "@a2ui/web_core": "file:../../web_core"
+      }
+    },
     "../lit": {
       "name": "@a2ui/lit",
       "version": "0.8.1",
@@ -141,33 +165,13 @@
       "link": true
     },
     "node_modules/@a2ui/markdown-it": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/@a2ui/markdown-it/-/markdown-it-0.0.1.tgz",
-      "integrity": "sha512-SIYNeUvBBO8mCa1n2haeZ3lZ5AVZSmZCpeyIMHDIMGYbGUXLCaSVU3qCdlzX78wR3xPEQ8zo8DvcezBBnVZLuA==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "dompurify": "^3.3.1",
-        "markdown-it": "^14.1.0"
-      },
-      "peerDependencies": {
-        "@a2ui/web_core": "^0.8.0"
-      }
+      "resolved": "../../markdown/markdown-it",
+      "link": true
     },
     "node_modules/@a2ui/react": {
       "resolved": "..",
       "link": true
     },
-    "node_modules/@a2ui/web_core": {
-      "version": "0.8.0",
-      "resolved": "https://registry.npmjs.org/@a2ui/web_core/-/web_core-0.8.0.tgz",
-      "integrity": "sha512-UG8IDsiLYuZjnEmqH7129EbN1Ds3DfC8FXPSI/E+0kcZ4VGxo//Kij6ZF2jBXBKyrHYPehoDtffFFIIFvgBp6g==",
-      "license": "Apache-2.0",
-      "peer": true,
-      "dependencies": {
-        "zod": "^3.25.76",
-        "zod-to-json-schema": "^3.25.1"
-      }
-    },
     "node_modules/@babel/code-frame": {
       "version": "7.29.0",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.0.tgz",
@@ -1695,18 +1699,6 @@
         }
       }
     },
-    "node_modules/dompurify": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.2.tgz",
-      "integrity": "sha512-6obghkliLdmKa56xdbLOpUZ43pAR6xFy1uOrxBaIDjT+yaRuuybLjGS9eVBoSR/UPU5fq3OXClEHLJNGvbxKpQ==",
-      "license": "(MPL-2.0 OR Apache-2.0)",
-      "engines": {
-        "node": ">=20"
-      },
-      "optionalDependencies": {
-        "@types/trusted-types": "^2.0.7"
-      }
-    },
     "node_modules/electron-to-chromium": {
       "version": "1.5.267",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.267.tgz",
@@ -2552,26 +2544,6 @@
       "engines": {
         "node": ">=12"
       }
-    },
-    "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
-      "license": "MIT",
-      "peer": true,
-      "funding": {
-        "url": "https://github.com/sponsors/colinhacks"
-      }
-    },
-    "node_modules/zod-to-json-schema": {
-      "version": "3.25.1",
-      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.1.tgz",
-      "integrity": "sha512-pM/SU9d3YAggzi6MtR4h7ruuQlqKtad8e9S0fmxcMi+ueAK5Korys/aWcV9LIIHTVbj01NdzxcnXSN+O74ZIVA==",
-      "license": "ISC",
-      "peer": true,
-      "peerDependencies": {
-        "zod": "^3.25 || ^4"
-      }
     }
   }
 }
diff --git a/renderers/react/visual-parity/package.json b/renderers/react/visual-parity/package.json
index fcdd23d23..8a7a777da 100644
--- a/renderers/react/visual-parity/package.json
+++ b/renderers/react/visual-parity/package.json
@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@a2ui/lit": "file:../../lit",
-    "@a2ui/markdown-it": "^0.0.1",
+    "@a2ui/markdown-it": "file:../../markdown/markdown-it",
     "@a2ui/react": "file:..",
     "@lit/context": "^1.1.0",
     "lit": "^3.1.0",
diff --git a/renderers/react/visual-parity/react/vite.config.ts b/renderers/react/visual-parity/react/vite.config.ts
index e3cb339d8..cbe0d9b52 100644
--- a/renderers/react/visual-parity/react/vite.config.ts
+++ b/renderers/react/visual-parity/react/vite.config.ts
@@ -28,6 +28,12 @@ export default defineConfig({
   optimizeDeps: {
     // Always re-optimize on startup so rebuilds of file: deps don't cause 504s
     force: true,
+    // Pre-bundle web_core subpath imports so Vite doesn't discover them lazily
+    // (which causes "optimized dependencies changed. reloading" mid-page-load)
+    include: [
+      '@a2ui/web_core/styles/index',
+      '@a2ui/web_core/data/model-processor',
+    ],
     exclude: [
       '@a2ui/react',
       '@a2ui/lit',