diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 52586982a..6fba0af93 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,9 @@ jobs:
 
     runs-on: ubuntu-latest
 
+    env:
+      PUPPETEER_SKIP_DOWNLOAD: true
+
     strategy:
       matrix:
         node-version: [ 18, 20, 22, 24 ]
diff --git a/AISKU/Tests/Unit/src/AISKUSize.Tests.ts b/AISKU/Tests/Unit/src/AISKUSize.Tests.ts
index f40aec3dd..87052898d 100644
--- a/AISKU/Tests/Unit/src/AISKUSize.Tests.ts
+++ b/AISKU/Tests/Unit/src/AISKUSize.Tests.ts
@@ -92,6 +92,7 @@ export class AISKUSizeCheck extends AITestClass {
     public registerTests() {
         this.addRawFileSizeCheck();
         this.addProdFileSizeCheck();
+        this.addRolldownPureAnnotationCheck();
     }
 
     constructor() {
@@ -105,6 +106,32 @@ export class AISKUSizeCheck extends AITestClass {
     private addProdFileSizeCheck(): void {
         this._checkFileSize(true);
     }
+
+    private addRolldownPureAnnotationCheck(): void {
+        this.testCase({
+            name: "Test AISKU dist canonicalizes PURE annotation spacing",
+            test: () => {
+                let request = new Request(this.rawFilePath, { method: "GET" });
+                return fetch(request).then((response) => {
+                    if (!response.ok) {
+                        Assert.ok(false, `fetch AISKU dist for PURE annotation check error: ${response.statusText}`);
+                        return;
+                    }
+
+                    return response.text().then((text) => {
+                        // Validate the final bundle no longer contains spaced PURE comment forms.
+                        let nonCanonicalPurePattern = /\(\s+\/\*\s*[#@]__PURE__\s*\*\/|\(\s*\/\*\s*[#@]__PURE__\s*\*\/\s+/g;
+                        let matches = text.match(nonCanonicalPurePattern) || [];
+                        Assert.equal(0, matches.length, `Found ${matches.length} non-canonical PURE annotations in AISKU dist`);
+                    }, (error: Error) => {
+                        Assert.ok(false, `AISKU dist PURE annotation check response error: ${error}`);
+                    });
+                }).catch((error: Error) => {
+                    Assert.ok(false, `AISKU dist PURE annotation check error: ${error}`);
+                });
+            }
+        });
+    }
     
     private _checkFileSize(isProd: boolean): void {
         let _filePath = isProd? this.prodFilePath : this.rawFilePath;
diff --git a/rollup.base.config.js b/rollup.base.config.js
index 4b6f18efb..5f3690b5b 100644
--- a/rollup.base.config.js
+++ b/rollup.base.config.js
@@ -30,6 +30,26 @@ function doCleanup() {
   })
 }
 
+function fixPureAnnotations() {
+    const PURE_COMMENT_CANONICALIZE = /\(\s*\/\*\s*([#@])__PURE__\s*\*\/\s*/g;
+
+    return {
+        name: "fix-pure-annotations",
+        renderChunk(code) {
+            let normalized = code.replace(PURE_COMMENT_CANONICALIZE, "(/*$1__PURE__*/");
+
+            if (normalized === code) {
+                return null;
+            }
+
+            return {
+                code: normalized,
+                map: null
+            };
+        }
+    };
+}
+
 const getNamespace = (prefix, namespaces, baseName, rootName) => {
     var result = prefix + "var " + baseName + "=" + rootName;
     if (namespaces.length > 0) {
@@ -361,6 +381,9 @@ const browserRollupConfigFactory = (isOneDs, banner, importCheckNames, targetTyp
         );
     }
 
+    // Keep this as the final pass so all generated/included PURE comments are normalized.
+    browserRollupConfig.plugins.push(fixPureAnnotations());
+
     // console.log(`Browser: ${JSON.stringify(browserRollupConfig)}`);
 
     return browserRollupConfig;
@@ -422,6 +445,9 @@ const nodeUmdRollupConfigFactory = (banner, importCheckNames, targetType, theNam
         );
     }
 
+    // Keep this as the final pass so all generated/included PURE comments are normalized.
+    nodeRollupConfig.plugins.push(fixPureAnnotations());
+
     return nodeRollupConfig;
 };
 
diff --git a/shared/AppInsightsCore/Tests/Unit/src/ai/AppInsightsCoreSize.Tests.ts b/shared/AppInsightsCore/Tests/Unit/src/ai/AppInsightsCoreSize.Tests.ts
index 8997e871d..3037ed3c3 100644
--- a/shared/AppInsightsCore/Tests/Unit/src/ai/AppInsightsCoreSize.Tests.ts
+++ b/shared/AppInsightsCore/Tests/Unit/src/ai/AppInsightsCoreSize.Tests.ts
@@ -67,6 +67,7 @@ export class AppInsightsCoreSizeCheck extends AITestClass {
     public registerTests() {
         this.addRawFileSizeCheck();
         this.addProdFileSizeCheck();
+        this.addRolldownPureAnnotationCheck();
     }
 
     constructor() {
@@ -80,6 +81,32 @@ export class AppInsightsCoreSizeCheck extends AITestClass {
     private addProdFileSizeCheck(): void {
         this._fileSizeCheck(true);
     }
+
+    private addRolldownPureAnnotationCheck(): void {
+        this.testCase({
+            name: "Test applicationinsights-core dist canonicalizes PURE annotation spacing",
+            test: () => {
+                let request = new Request(this.rawFilePath, { method: "GET" });
+                return fetch(request).then((response) => {
+                    if (!response.ok) {
+                        Assert.ok(false, `fetch applicationinsights-core dist for PURE annotation check error: ${response.statusText}`);
+                        return;
+                    }
+
+                    return response.text().then((text) => {
+                        // Validate the final bundle no longer contains spaced PURE comment forms.
+                        let nonCanonicalPurePattern = /\(\s+\/\*\s*[#@]__PURE__\s*\*\/|\(\s*\/\*\s*[#@]__PURE__\s*\*\/\s+/g;
+                        let matches = text.match(nonCanonicalPurePattern) || [];
+                        Assert.equal(0, matches.length, `Found ${matches.length} non-canonical PURE annotations in AppInsightsCore dist`);
+                    }, (error) => {
+                        Assert.ok(false, `applicationinsights-core dist PURE annotation check response error: ${error}`);
+                    });
+                }).catch((error: Error) => {
+                    Assert.ok(false, `applicationinsights-core dist PURE annotation check error: ${error}`);
+                });
+            }
+        });
+    }
     
     private _fileSizeCheck(isProd: boolean): void {
         let _filePath = isProd? this.prodFilePath : this.rawFilePath;
diff --git a/shared/AppInsightsCore/src/ext/extUtils.ts b/shared/AppInsightsCore/src/ext/extUtils.ts
index 9107aea2f..1a19eb2ca 100644
--- a/shared/AppInsightsCore/src/ext/extUtils.ts
+++ b/shared/AppInsightsCore/src/ext/extUtils.ts
@@ -19,7 +19,7 @@ import { isReactNative } from "../utils/EnvUtils";
 /**
  * Identifies the version for the extended SDK
  */
-export const ExtVersion = "4.4.1";
+export const ExtVersion = "#extVersion#";
 
 /**
  * Identifies the full version for the extended SDK