diff --git a/.github/workflows/extensions-check-nightly.yml b/.github/workflows/extensions-check-nightly.yml
index f3186c11344..826b20efab4 100644
--- a/.github/workflows/extensions-check-nightly.yml
+++ b/.github/workflows/extensions-check-nightly.yml
@@ -28,7 +28,7 @@ jobs:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       POSITRON_BUILD_NUMBER: 0 # CI skips building releases
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Attempt 1 - Setup Build and Compile
         id: attempt1
diff --git a/.github/workflows/monaco-editor.yml b/.github/workflows/monaco-editor.yml
index 9af863861a1..3eacf42d6cd 100644
--- a/.github/workflows/monaco-editor.yml
+++ b/.github/workflows/monaco-editor.yml
@@ -19,7 +19,7 @@ jobs:
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/positron-python-ci.yml b/.github/workflows/positron-python-ci.yml
index fb4f6ff9584..d2ab8ced68e 100644
--- a/.github/workflows/positron-python-ci.yml
+++ b/.github/workflows/positron-python-ci.yml
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Node ${{ env.NODE_VERSION }}
         uses: actions/setup-node@v6
@@ -91,7 +91,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install uv and Python
         uses: astral-sh/setup-uv@v7
@@ -137,7 +137,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: ${{ env.special-working-directory-relative }}
 
@@ -189,7 +189,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install uv and Python
         uses: astral-sh/setup-uv@v7
@@ -221,7 +221,7 @@ jobs:
             python: '3.9'
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install uv and Python
         uses: astral-sh/setup-uv@v7
@@ -272,7 +272,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: ${{ env.special-working-directory-relative }}
 
diff --git a/.github/workflows/positron-python-nightly.yml b/.github/workflows/positron-python-nightly.yml
index f40773a3609..2e91f5ff3e0 100644
--- a/.github/workflows/positron-python-nightly.yml
+++ b/.github/workflows/positron-python-nightly.yml
@@ -49,7 +49,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: ${{ env.special-working-directory-relative }}
 
@@ -105,7 +105,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install uv and Python
         uses: astral-sh/setup-uv@v7
diff --git a/.github/workflows/pr-e2e-comment.yml b/.github/workflows/pr-e2e-comment.yml
index ff31b4b4f73..85606239097 100644
--- a/.github/workflows/pr-e2e-comment.yml
+++ b/.github/workflows/pr-e2e-comment.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event.pull_request.state != 'closed' }} # Skip job if PR is closed
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Parse Tags from PR Body
         id: pr-tags
diff --git a/.github/workflows/prevent-repo-references.yml b/.github/workflows/prevent-repo-references.yml
index 13dda085669..b7711253649 100644
--- a/.github/workflows/prevent-repo-references.yml
+++ b/.github/workflows/prevent-repo-references.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Check for repo references in package.json
         run: |
diff --git a/.github/workflows/slack-skipped-tests.yml b/.github/workflows/slack-skipped-tests.yml
index 93661e43ce5..d850b09536c 100644
--- a/.github/workflows/slack-skipped-tests.yml
+++ b/.github/workflows/slack-skipped-tests.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run Slack Skipped Tests Script
         run: node scripts/slack-skipped-tests.js ${{ secrets.SLACK_QA_WEBHOOK_URL }}
diff --git a/.github/workflows/telemetry.yml b/.github/workflows/telemetry.yml
index 9f3ec263668..7d220b7df4c 100644
--- a/.github/workflows/telemetry.yml
+++ b/.github/workflows/telemetry.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: 'ubuntu-latest'
 
     steps:
-      - uses: 'actions/checkout@v5'
+      - uses: 'actions/checkout@v6'
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/test-assistant-llm.yml b/.github/workflows/test-assistant-llm.yml
index 078fa670bd2..53367183ef5 100644
--- a/.github/workflows/test-assistant-llm.yml
+++ b/.github/workflows/test-assistant-llm.yml
@@ -58,7 +58,7 @@ jobs:  # to input into inspect-ai-test job below
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
diff --git a/.github/workflows/test-e2e-rhel.yml b/.github/workflows/test-e2e-rhel.yml
index 37b8f675533..1fa14c160e2 100644
--- a/.github/workflows/test-e2e-rhel.yml
+++ b/.github/workflows/test-e2e-rhel.yml
@@ -131,7 +131,7 @@ jobs:
       DATABRICKS_WORKSPACE: ${{ secrets.DATABRICKS_WORKSPACE }}
       DATABRICKS_PAT: ${{ secrets.DATABRICKS_PAT }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
diff --git a/.github/workflows/test-e2e-ubuntu-build.yml b/.github/workflows/test-e2e-ubuntu-build.yml
index 1bae71e707b..4572999cdd4 100644
--- a/.github/workflows/test-e2e-ubuntu-build.yml
+++ b/.github/workflows/test-e2e-ubuntu-build.yml
@@ -54,7 +54,7 @@ jobs:
       HOME: /root
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
diff --git a/.github/workflows/test-e2e-ubuntu-run.yml b/.github/workflows/test-e2e-ubuntu-run.yml
index 2a27466b8ed..cd2a5b9fd51 100644
--- a/.github/workflows/test-e2e-ubuntu-run.yml
+++ b/.github/workflows/test-e2e-ubuntu-run.yml
@@ -134,7 +134,7 @@ jobs:
       DATABRICKS_WORKSPACE: ${{ secrets.DATABRICKS_WORKSPACE }}
       DATABRICKS_PAT: ${{ secrets.DATABRICKS_PAT }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
@@ -362,7 +362,7 @@ jobs:
     needs: [e2e-ubuntu-run]
     runs-on: ubuntu-latest-4x
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
diff --git a/.github/workflows/test-e2e-ubuntu.yml b/.github/workflows/test-e2e-ubuntu.yml
index d8c01040402..6e720fd31da 100644
--- a/.github/workflows/test-e2e-ubuntu.yml
+++ b/.github/workflows/test-e2e-ubuntu.yml
@@ -146,7 +146,7 @@ jobs:
       DATABRICKS_WORKSPACE: ${{ secrets.DATABRICKS_WORKSPACE }}
       DATABRICKS_PAT: ${{ secrets.DATABRICKS_PAT }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
diff --git a/.github/workflows/test-e2e-windows.yml b/.github/workflows/test-e2e-windows.yml
index 666183b00ff..68b76e8d14d 100644
--- a/.github/workflows/test-e2e-windows.yml
+++ b/.github/workflows/test-e2e-windows.yml
@@ -92,7 +92,7 @@ jobs:
     outputs:
       extensions_failed: ${{ steps.extensions.outputs.exit_code != '0' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
diff --git a/.github/workflows/test-integration.yml b/.github/workflows/test-integration.yml
index c45d99eb5cb..37e6b2a7e0c 100644
--- a/.github/workflows/test-integration.yml
+++ b/.github/workflows/test-integration.yml
@@ -30,7 +30,7 @@ jobs:
       _R_CHECK_CRAN_INCOMING_: false
       _R_CHECK_SYSTEM_CLOCK_: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
diff --git a/.github/workflows/test-pull-request.yml b/.github/workflows/test-pull-request.yml
index 5dd2ca6c963..bfef57508c1 100644
--- a/.github/workflows/test-pull-request.yml
+++ b/.github/workflows/test-pull-request.yml
@@ -23,7 +23,7 @@ jobs:
       rhel_web_tag_found: ${{ steps.pr-tags.outputs.rhel_web_tag_found }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Parse Tags from PR Body
         id: pr-tags
         run: bash scripts/pr-tags-parse.sh
diff --git a/.github/workflows/test-unit.yml b/.github/workflows/test-unit.yml
index 3ace1e119e9..7ea2570e368 100644
--- a/.github/workflows/test-unit.yml
+++ b/.github/workflows/test-unit.yml
@@ -20,7 +20,7 @@ jobs:
       _R_CHECK_CRAN_INCOMING_: false
       _R_CHECK_SYSTEM_CLOCK_: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with: