diff --git a/CHANGELOG.md b/CHANGELOG.md
index 359ccfce..ce925039 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,12 @@
   - Adds `arrConcat` as a dedicated array helper and `fnBindArgs` as a dedicated function helper
   - Improves function binding typing with exported `BoundFunction` and updated signatures for `fnBind` / `fnBindArgs`
 
+### Bug Fixes
+
+- [#568](https://github.com/nevware21/ts-utils/issues/568) Rolldown `INVALID_ANNOTATION` warnings caused by non-canonical PURE annotation spacing in generated output
+  - [#569](https://github.com/nevware21/ts-utils/pull/569) Add generated-chunk PURE annotation normalization so spaced forms are rewritten to canonical `(/*#__PURE__*/` / `(/*@__PURE__*/` in rollup output
+  - [#575](https://github.com/nevware21/ts-utils/pull/575) Add packaged artifact validation for PURE annotation spacing and update normalization tolerance, with per-file logging while scanning `lib/bundle` and `lib/dist`
+
 # v0.14.0 May 18th, 2026
 
 ## Changelog
diff --git a/lib/rollup.config.js b/lib/rollup.config.js
index 9be55b7a..8b6d5b70 100644
--- a/lib/rollup.config.js
+++ b/lib/rollup.config.js
@@ -91,7 +91,7 @@ export function uglify3(options = {}) {
 // canonical form with the comment flush against the open paren, which every
 // bundler accepts. Uses magic-string so the generated sourcemap stays valid.
 export function fixPureAnnotations() {
-    const pureRe = /\([ \t]*\/\*[ \t]*([#@])__PURE__[ \t]*\*\//g;
+    const pureRe = /\(\s{0,5}\/\*\s{0,5}([#@])__PURE__\s{0,5}\*\//g;
 
     return {
         name: "fix-pure-annotations",
diff --git a/lib/test/bundle-pure-annotations-check.js b/lib/test/bundle-pure-annotations-check.js
new file mode 100644
index 00000000..82dc9777
--- /dev/null
+++ b/lib/test/bundle-pure-annotations-check.js
@@ -0,0 +1,79 @@
+const fs = require("fs");
+const path = require("path");
+
+const outputRoots = [
+    path.join(__dirname, "../bundle"),
+    path.join(__dirname, "../dist")
+];
+
+const invalidPureAnnotationRe = /\(\s+\/\*\s*([#@])__PURE__\s*\*\//g;
+
+function collectJsFiles(rootPath, output) {
+    if (!fs.existsSync(rootPath)) {
+        return;
+    }
+
+    fs.readdirSync(rootPath).forEach((name) => {
+        const fullPath = path.join(rootPath, name);
+        const stat = fs.statSync(fullPath);
+
+        if (stat.isDirectory()) {
+            collectJsFiles(fullPath, output);
+            return;
+        }
+
+        if (stat.isFile() && path.extname(name) === ".js") {
+            output.push(fullPath);
+        }
+    });
+}
+
+function getLineNumber(content, index) {
+    let line = 1;
+    for (let lp = 0; lp < index; lp++) {
+        if (content.charCodeAt(lp) === 10) {
+            line++;
+        }
+    }
+
+    return line;
+}
+
+const jsFiles = [];
+outputRoots.forEach((rootPath) => collectJsFiles(rootPath, jsFiles));
+
+if (jsFiles.length === 0) {
+    console.error("No generated JavaScript files were found under lib/bundle or lib/dist");
+    process.exit(1);
+}
+
+const failures = [];
+
+console.log("Scanning generated JavaScript files for PURE annotation spacing...");
+console.log("Files discovered: " + jsFiles.length);
+
+jsFiles.forEach((filePath) => {
+    const relativeFilePath = path.relative(process.cwd(), filePath).replace(/\\/g, "/");
+    console.log(" - Processing " + relativeFilePath);
+    const content = fs.readFileSync(filePath, "utf8");
+    let match;
+
+    invalidPureAnnotationRe.lastIndex = 0;
+    while ((match = invalidPureAnnotationRe.exec(content))) {
+        failures.push({
+            filePath: relativeFilePath,
+            line: getLineNumber(content, match.index),
+            sample: match[0]
+        });
+    }
+});
+
+if (failures.length > 0) {
+    console.error("Found invalid PURE annotations with leading whitespace after '(':");
+    failures.forEach((failure) => {
+        console.error(" - " + failure.filePath + ":" + failure.line + " -> " + failure.sample);
+    });
+    process.exit(1);
+}
+
+console.log("PURE annotation spacing check passed for generated bundle/dist JavaScript files.");
diff --git a/package.json b/package.json
index 81391a21..4dd7a331 100644
--- a/package.json
+++ b/package.json
@@ -211,7 +211,7 @@
         "dtsgen": "api-extractor run --local --verbose && node lib/scripts/setTsReferences.js",
         "size": "size-limit",
         "size-save": "size-limit --clean-dir --save-bundle build/size",
-        "size-check": "node lib/test/bundle-size-check.js",
+        "size-check": "node lib/test/bundle-size-check.js && node lib/test/bundle-pure-annotations-check.js",
         "link-check": "node lib/test/readme-links-check.js",
         "readme-link-check": "npm run docs && npm run link-check"
     },