diff --git a/.github/workflows/__config-input.yml b/.github/workflows/__config-input.yml
index 4267e0058..f3f248cda 100644
--- a/.github/workflows/__config-input.yml
+++ b/.github/workflows/__config-input.yml
@@ -51,6 +51,8 @@ jobs:
         with:
           node-version: 20.x
           cache: npm
+      - name: Install newer npm
+        run: npm install -g npm@11.19.1
       - name: Install dependencies
         run: npm ci
       - name: Prepare test
diff --git a/.github/workflows/__packaging-codescanning-config-inputs-js.yml b/.github/workflows/__packaging-codescanning-config-inputs-js.yml
index 409e0a1a6..4cb0499d6 100644
--- a/.github/workflows/__packaging-codescanning-config-inputs-js.yml
+++ b/.github/workflows/__packaging-codescanning-config-inputs-js.yml
@@ -84,6 +84,8 @@ jobs:
         with:
           node-version: 20.x
           cache: npm
+      - name: Install newer npm
+        run: npm install -g npm@11.19.1
       - name: Install dependencies
         run: npm ci
       - name: Prepare test
diff --git a/.github/workflows/__packaging-config-inputs-js.yml b/.github/workflows/__packaging-config-inputs-js.yml
index 34d4ae1bc..ed049214e 100644
--- a/.github/workflows/__packaging-config-inputs-js.yml
+++ b/.github/workflows/__packaging-config-inputs-js.yml
@@ -84,6 +84,8 @@ jobs:
         with:
           node-version: 20.x
           cache: npm
+      - name: Install newer npm
+        run: npm install -g npm@11.19.1
       - name: Install dependencies
         run: npm ci
       - name: Prepare test
diff --git a/.github/workflows/__packaging-config-js.yml b/.github/workflows/__packaging-config-js.yml
index 88426cd68..7cf99882b 100644
--- a/.github/workflows/__packaging-config-js.yml
+++ b/.github/workflows/__packaging-config-js.yml
@@ -84,6 +84,8 @@ jobs:
         with:
           node-version: 20.x
           cache: npm
+      - name: Install newer npm
+        run: npm install -g npm@11.19.1
       - name: Install dependencies
         run: npm ci
       - name: Prepare test
diff --git a/.github/workflows/__packaging-inputs-js.yml b/.github/workflows/__packaging-inputs-js.yml
index 2461944db..6b488a7cf 100644
--- a/.github/workflows/__packaging-inputs-js.yml
+++ b/.github/workflows/__packaging-inputs-js.yml
@@ -84,6 +84,8 @@ jobs:
         with:
           node-version: 20.x
           cache: npm
+      - name: Install newer npm
+        run: npm install -g npm@11.19.1
       - name: Install dependencies
         run: npm ci
       - name: Prepare test
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index c752c5dc7..b2ce0a614 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -47,6 +47,12 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: "npm"
 
+      # Install a new enough version of `npm` to understand `min-release-age`
+      # that is still compatible with Node 20.
+      - name: Install newer npm
+        if: matrix.node-version == 20
+        run: npm install -g npm@11.19.1
+
       - name: Install dependencies
         run: |
           # Use the system Bash shell to ensure we can run commands like `npm ci`
@@ -95,6 +101,14 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
+      - name: Check for incorrect addresses in package-lock.json
+        run: |
+          if git grep -nE '(pkgs\.visualstudio\.com|pkgs\.dev\.azure\.com|packagefeedproxy\.microsoft\.io)' -- \
+              'package-lock.json'; then
+            echo "::error::package-lock.json contains internal package feed URLs. Replace them with public registry URLs."
+            exit 1
+          fi
+
       - name: Set up Node.js
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
diff --git a/package-lock.json b/package-lock.json
index 668bc2fbf..27bf393bf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2596,7 +2596,7 @@
     },
     "node_modules/@types/debug": {
       "version": "4.1.13",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/@types/debug/-/debug-4.1.13.tgz",
+      "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.13.tgz",
       "integrity": "sha1-ItHMnVQtNZPK6nZPl0MGqzYobuc=",
       "license": "MIT",
       "dependencies": {
@@ -2639,7 +2639,7 @@
     },
     "node_modules/@types/mdast": {
       "version": "4.0.4",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/@types/mdast/-/mdast-4.0.4.tgz",
+      "resolved": "https://registry.npmjs.org/@types/mdast/-/mdast-4.0.4.tgz",
       "integrity": "sha1-fM9y7dLxqn3TQ34YDGQ3NYWATdY=",
       "license": "MIT",
       "dependencies": {
@@ -2648,7 +2648,7 @@
     },
     "node_modules/@types/ms": {
       "version": "2.1.0",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/@types/ms/-/ms-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/@types/ms/-/ms-2.1.0.tgz",
       "integrity": "sha1-BSqmekjszEMJ1/AZG35BQ0uQu3g=",
       "license": "MIT"
     },
@@ -2713,7 +2713,7 @@
     },
     "node_modules/@types/unist": {
       "version": "3.0.3",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/@types/unist/-/unist-3.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/@types/unist/-/unist-3.0.3.tgz",
       "integrity": "sha1-rKqw+RnOaczmKcLU7S60rcG2wgw=",
       "license": "MIT"
     },
@@ -4249,7 +4249,7 @@
     },
     "node_modules/character-entities": {
       "version": "2.0.2",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/character-entities/-/character-entities-2.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/character-entities/-/character-entities-2.0.2.tgz",
       "integrity": "sha1-LQnC5yzZUjB2zLIRV9/2atQ/zCI=",
       "license": "MIT",
       "funding": {
@@ -4644,7 +4644,7 @@
     },
     "node_modules/decode-named-character-reference": {
       "version": "1.3.0",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/decode-named-character-reference/-/decode-named-character-reference-1.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/decode-named-character-reference/-/decode-named-character-reference-1.3.0.tgz",
       "integrity": "sha1-PkBgN2CHTC5YZ2kbWZ1zp9oltT8=",
       "license": "MIT",
       "dependencies": {
@@ -4700,7 +4700,7 @@
     },
     "node_modules/dequal": {
       "version": "2.0.3",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/dequal/-/dequal-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/dequal/-/dequal-2.0.3.tgz",
       "integrity": "sha1-JkQhTxmX057Q7g7OcjNUkKesZ74=",
       "license": "MIT",
       "engines": {
@@ -4719,7 +4719,7 @@
     },
     "node_modules/devlop": {
       "version": "1.1.0",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/devlop/-/devlop-1.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/devlop/-/devlop-1.1.0.tgz",
       "integrity": "sha1-TbfCyk3G4Og0wwvnDJS7yXbccBg=",
       "license": "MIT",
       "dependencies": {
@@ -7519,7 +7519,7 @@
     },
     "node_modules/mdast-util-to-string": {
       "version": "4.0.0",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/mdast-util-to-string/-/mdast-util-to-string-4.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/mdast-util-to-string/-/mdast-util-to-string-4.0.0.tgz",
       "integrity": "sha1-elEhR1VWoE5+3etnsmSq550xKBQ=",
       "license": "MIT",
       "dependencies": {
@@ -7558,7 +7558,7 @@
     },
     "node_modules/micromark": {
       "version": "4.0.2",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark/-/micromark-4.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/micromark/-/micromark-4.0.2.tgz",
       "integrity": "sha1-kTlaPhiEoZjmIRbjPJxWjjmTb9s=",
       "funding": [
         {
@@ -7593,7 +7593,7 @@
     },
     "node_modules/micromark-core-commonmark": {
       "version": "2.0.3",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-core-commonmark/-/micromark-core-commonmark-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-core-commonmark/-/micromark-core-commonmark-2.0.3.tgz",
       "integrity": "sha1-xpFjDkhQIaaM8o28Kyyifr9njNQ=",
       "funding": [
         {
@@ -7627,7 +7627,7 @@
     },
     "node_modules/micromark-factory-destination": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-factory-destination/-/micromark-factory-destination-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-factory-destination/-/micromark-factory-destination-2.0.1.tgz",
       "integrity": "sha1-j++OD3CB8EdPvdkt61DJkKAmRjk=",
       "funding": [
         {
@@ -7648,7 +7648,7 @@
     },
     "node_modules/micromark-factory-label": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-factory-label/-/micromark-factory-label-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-factory-label/-/micromark-factory-label-2.0.1.tgz",
       "integrity": "sha1-UmfvqX8eUlTvx/ILRZo4yyEFi6E=",
       "funding": [
         {
@@ -7670,7 +7670,7 @@
     },
     "node_modules/micromark-factory-space": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-factory-space/-/micromark-factory-space-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-factory-space/-/micromark-factory-space-2.0.1.tgz",
       "integrity": "sha1-NtAhLpYrKzEh+FJfx6PHwCnzNPw=",
       "funding": [
         {
@@ -7690,7 +7690,7 @@
     },
     "node_modules/micromark-factory-title": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-factory-title/-/micromark-factory-title-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-factory-title/-/micromark-factory-title-2.0.1.tgz",
       "integrity": "sha1-I35KpdWKlYY/AQMtnumwkPHebpQ=",
       "funding": [
         {
@@ -7712,7 +7712,7 @@
     },
     "node_modules/micromark-factory-whitespace": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-factory-whitespace/-/micromark-factory-whitespace-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-factory-whitespace/-/micromark-factory-whitespace-2.0.1.tgz",
       "integrity": "sha1-BrJrKYPE0nv8xlezPiUTTUhosLE=",
       "funding": [
         {
@@ -7734,7 +7734,7 @@
     },
     "node_modules/micromark-util-character": {
       "version": "2.1.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-character/-/micromark-util-character-2.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-character/-/micromark-util-character-2.1.1.tgz",
       "integrity": "sha1-L5h4MaQNTFEKwmHomFLE6XA8zaY=",
       "funding": [
         {
@@ -7754,7 +7754,7 @@
     },
     "node_modules/micromark-util-chunked": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-chunked/-/micromark-util-chunked-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-chunked/-/micromark-util-chunked-2.0.1.tgz",
       "integrity": "sha1-R/vNk0caP8yrhs/wOEf8NVLbEFE=",
       "funding": [
         {
@@ -7773,7 +7773,7 @@
     },
     "node_modules/micromark-util-classify-character": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-classify-character/-/micromark-util-classify-character-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-classify-character/-/micromark-util-classify-character-2.0.1.tgz",
       "integrity": "sha1-05n6+cRcoUyLS+mLHqSBvO2Htik=",
       "funding": [
         {
@@ -7794,7 +7794,7 @@
     },
     "node_modules/micromark-util-combine-extensions": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-combine-extensions/-/micromark-util-combine-extensions-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-combine-extensions/-/micromark-util-combine-extensions-2.0.1.tgz",
       "integrity": "sha1-Kg9JCrCL/1zC/V7sbdDKBPibMKk=",
       "funding": [
         {
@@ -7814,7 +7814,7 @@
     },
     "node_modules/micromark-util-decode-numeric-character-reference": {
       "version": "2.0.2",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-decode-numeric-character-reference/-/micromark-util-decode-numeric-character-reference-2.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-decode-numeric-character-reference/-/micromark-util-decode-numeric-character-reference-2.0.2.tgz",
       "integrity": "sha1-/PFbZgl5OI5vEYzba/fXnXPSb+U=",
       "funding": [
         {
@@ -7833,7 +7833,7 @@
     },
     "node_modules/micromark-util-decode-string": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-decode-string/-/micromark-util-decode-string-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-decode-string/-/micromark-util-decode-string-2.0.1.tgz",
       "integrity": "sha1-bLmVguXScehO/KjmGoB5lNcWHrI=",
       "funding": [
         {
@@ -7855,7 +7855,7 @@
     },
     "node_modules/micromark-util-encode": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-encode/-/micromark-util-encode-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-encode/-/micromark-util-encode-2.0.1.tgz",
       "integrity": "sha1-DVHRwJVVHPqsNoMmljz1XxX1QLg=",
       "funding": [
         {
@@ -7871,7 +7871,7 @@
     },
     "node_modules/micromark-util-html-tag-name": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-html-tag-name/-/micromark-util-html-tag-name-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-html-tag-name/-/micromark-util-html-tag-name-2.0.1.tgz",
       "integrity": "sha1-5AQDCWSBmGtBwQZif5j3LU0QuCU=",
       "funding": [
         {
@@ -7887,7 +7887,7 @@
     },
     "node_modules/micromark-util-normalize-identifier": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-normalize-identifier/-/micromark-util-normalize-identifier-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-normalize-identifier/-/micromark-util-normalize-identifier-2.0.1.tgz",
       "integrity": "sha1-ww13sugyrPZSb4vxqke8nJQ4wW0=",
       "funding": [
         {
@@ -7906,7 +7906,7 @@
     },
     "node_modules/micromark-util-resolve-all": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-resolve-all/-/micromark-util-resolve-all-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-resolve-all/-/micromark-util-resolve-all-2.0.1.tgz",
       "integrity": "sha1-4aLWLN0jcjCirhGDkCexk4HjHos=",
       "funding": [
         {
@@ -7925,7 +7925,7 @@
     },
     "node_modules/micromark-util-sanitize-uri": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-17.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-sanitize-uri/-/micromark-util-sanitize-uri-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-sanitize-uri/-/micromark-util-sanitize-uri-2.0.1.tgz",
       "integrity": "sha1-q4l4m4GKWHUrc9a1UjhiG3+qj9c=",
       "funding": [
         {
@@ -7946,7 +7946,7 @@
     },
     "node_modules/micromark-util-subtokenize": {
       "version": "2.1.0",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-subtokenize/-/micromark-util-subtokenize-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-subtokenize/-/micromark-util-subtokenize-2.1.0.tgz",
       "integrity": "sha1-2K3lug8xl6HPaimZ+7/mNXoaGe4=",
       "funding": [
         {
@@ -7968,7 +7968,7 @@
     },
     "node_modules/micromark-util-symbol": {
       "version": "2.0.1",
-      "resolved": "https://ms-feed-2.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-symbol/-/micromark-util-symbol-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-symbol/-/micromark-util-symbol-2.0.1.tgz",
       "integrity": "sha1-5dpJTo6ysHGg0I+zT2zv7GwKGbg=",
       "funding": [
         {
@@ -7984,7 +7984,7 @@
     },
     "node_modules/micromark-util-types": {
       "version": "2.0.2",
-      "resolved": "https://ms-feed-12.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/micromark-util-types/-/micromark-util-types-2.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/micromark-util-types/-/micromark-util-types-2.0.2.tgz",
       "integrity": "sha1-8AIl9fWg68MlT5bDa2YFxLOTkI4=",
       "funding": [
         {
@@ -10069,7 +10069,7 @@
     },
     "node_modules/unist-util-stringify-position": {
       "version": "4.0.0",
-      "resolved": "https://ms-feed-25.pkgs.visualstudio.com/1es-public/_packaging/npm-public/npm/registry/unist-util-stringify-position/-/unist-util-stringify-position-4.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/unist-util-stringify-position/-/unist-util-stringify-position-4.0.0.tgz",
       "integrity": "sha1-RJxuIaiA4IVb9aq63rOnQDFKusI=",
       "license": "MIT",
       "dependencies": {
diff --git a/pr-checks/sync.ts b/pr-checks/sync.ts
index f0942ad2d..23ff6fc23 100755
--- a/pr-checks/sync.ts
+++ b/pr-checks/sync.ts
@@ -221,6 +221,12 @@ const languageSetups: LanguageSetups = {
           cache: "npm",
         },
       },
+      // Install a new enough version of `npm` to understand `min-release-age`
+      // that is still compatible with Node 20.
+      {
+        name: "Install newer npm",
+        run: "npm install -g npm@11.19.1",
+      },
       {
         name: "Install dependencies",
         run: "npm ci",