diff --git a/.github/labeler.yml b/.github/labeler.yml
index 0e43646c7ba2..65f820799716 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -38,6 +38,10 @@ Swift:
   - swift/**/*
   - change-notes/**/*swift*
 
+Actions:
+  - actions/**/*
+  - change-notes/**/*actions*
+
 documentation:
   - "**/*.qhelp"
   - "**/*.md"
diff --git a/actions/extractor/codeql-extractor.yml b/actions/extractor/codeql-extractor.yml
new file mode 100644
index 000000000000..ab7374910054
--- /dev/null
+++ b/actions/extractor/codeql-extractor.yml
@@ -0,0 +1,44 @@
+name: "actions"
+aliases: []
+display_name: "GitHub Actions"
+version: 0.0.1
+column_kind: "utf16"
+unicode_newlines: true
+build_modes:
+  - none
+file_coverage_languages: []
+github_api_languages: []
+scc_languages: []
+file_types:
+  - name: workflow
+    display_name: GitHub Actions workflow files
+    extensions:
+      - .yml
+      - .yaml
+forwarded_extractor_name: javascript
+options:
+  trap:
+    title: TRAP options
+    description: Options about how the extractor handles TRAP files
+    type: object
+    visibility: 3
+    properties:
+      cache:
+        title: TRAP cache options
+        description: Options about how the extractor handles its TRAP cache
+        type: object
+        properties:
+          dir:
+            title: TRAP cache directory
+            description: The directory of the TRAP cache to use
+            type: string
+          bound:
+            title: TRAP cache bound
+            description: A soft limit (in MB) on the size of the TRAP cache
+            type: string
+            pattern: "[0-9]+"
+          write:
+            title: TRAP cache writeable
+            description: Whether to write to the TRAP cache as well as reading it
+            type: string
+            pattern: "(true|TRUE|false|FALSE)"
diff --git a/actions/extractor/tools/autobuild-impl.ps1 b/actions/extractor/tools/autobuild-impl.ps1
new file mode 100644
index 000000000000..6ae433f2599c
--- /dev/null
+++ b/actions/extractor/tools/autobuild-impl.ps1
@@ -0,0 +1,40 @@
+if (($null -ne $env:LGTM_INDEX_INCLUDE) -or ($null -ne $env:LGTM_INDEX_EXCLUDE) -or ($null -ne $env:LGTM_INDEX_FILTERS)) {
+    Write-Output 'Path filters set. Passing them through to the JavaScript extractor.' 
+} else {
+    Write-Output 'No path filters set. Using the default filters.'
+    $DefaultPathFilters = @(
+        'exclude:**/*',
+        'include:.github/workflows/**/*.yml',
+        'include:.github/workflows/**/*.yaml',
+        'include:**/action.yml',
+        'include:**/action.yaml'
+    )
+
+    $env:LGTM_INDEX_FILTERS = $DefaultPathFilters -join "`n"
+}
+
+# Find the JavaScript extractor directory via `codeql resolve extractor`.
+$CodeQL = Join-Path $env:CODEQL_DIST 'codeql.exe'
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_ROOT = &$CodeQL resolve extractor --language javascript
+if ($LASTEXITCODE -ne 0) {
+    throw 'Failed to resolve JavaScript extractor.'
+}
+
+Write-Output "Found JavaScript extractor at '${env:CODEQL_EXTRACTOR_JAVASCRIPT_ROOT}'."
+
+# Run the JavaScript autobuilder.
+$JavaScriptAutoBuild = Join-Path $env:CODEQL_EXTRACTOR_JAVASCRIPT_ROOT 'tools\autobuild.cmd'
+Write-Output "Running JavaScript autobuilder at '${JavaScriptAutoBuild}'."
+
+# Copy the values of the Actions extractor environment variables to the JavaScript extractor environment variables.
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_DIAGNOSTIC_DIR = $env:CODEQL_EXTRACTOR_ACTIONS_DIAGNOSTIC_DIR
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_LOG_DIR = $env:CODEQL_EXTRACTOR_ACTIONS_LOG_DIR
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_SCRATCH_DIR = $env:CODEQL_EXTRACTOR_ACTIONS_SCRATCH_DIR
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_SOURCE_ARCHIVE_DIR = $env:CODEQL_EXTRACTOR_ACTIONS_SOURCE_ARCHIVE_DIR
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_TRAP_DIR = $env:CODEQL_EXTRACTOR_ACTIONS_TRAP_DIR
+$env:CODEQL_EXTRACTOR_JAVASCRIPT_WIP_DATABASE = $env:CODEQL_EXTRACTOR_ACTIONS_WIP_DATABASE
+
+&$JavaScriptAutoBuild
+if ($LASTEXITCODE -ne 0) {
+    throw "JavaScript autobuilder failed."
+}
diff --git a/actions/extractor/tools/autobuild.cmd b/actions/extractor/tools/autobuild.cmd
new file mode 100644
index 000000000000..ff5ca89d94a4
--- /dev/null
+++ b/actions/extractor/tools/autobuild.cmd
@@ -0,0 +1,3 @@
+@echo off
+rem All of the work is done in the PowerShell script
+powershell.exe %~dp0autobuild-impl.ps1
diff --git a/actions/extractor/tools/autobuild.sh b/actions/extractor/tools/autobuild.sh
new file mode 100755
index 000000000000..656e0f356352
--- /dev/null
+++ b/actions/extractor/tools/autobuild.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -eu
+
+DEFAULT_PATH_FILTERS=$(cat << END
+exclude:**/*
+include:.github/workflows/**/*.yml
+include:.github/workflows/**/*.yaml
+include:**/action.yml
+include:**/action.yaml
+END
+)
+
+if [ -n "${LGTM_INDEX_INCLUDE}" ] || [ -n "${LGTM_INDEX_EXCLUDE}" ] || [ -n "${LGTM_INDEX_FILTERS}" ] ; then
+    echo "Path filters set. Passing them through to the JavaScript extractor."
+else
+    echo "No path filters set. Using the default filters."
+    LGTM_INDEX_FILTERS="${DEFAULT_PATH_FILTERS}"
+    export LGTM_INDEX_FILTERS
+fi
+
+# Find the JavaScript extractor directory via `codeql resolve extractor`.
+CODEQL_EXTRACTOR_JAVASCRIPT_ROOT="$($CODEQL_DIST/codeql resolve extractor --language javascript)"
+export CODEQL_EXTRACTOR_JAVASCRIPT_ROOT
+
+echo "Found JavaScript extractor at '${CODEQL_EXTRACTOR_JAVASCRIPT_ROOT}'."
+
+# Run the JavaScript autobuilder
+JAVASCRIPT_AUTO_BUILD="${CODEQL_EXTRACTOR_JAVASCRIPT_ROOT}/tools/autobuild.sh"
+echo "Running JavaScript autobuilder at '${JAVASCRIPT_AUTO_BUILD}'."
+
+# Copy the values of the Actions extractor environment variables to the JavaScript extractor environment variables.
+env CODEQL_EXTRACTOR_JAVASCRIPT_DIAGNOSTIC_DIR="${CODEQL_EXTRACTOR_ACTIONS_DIAGNOSTIC_DIR}" \
+    CODEQL_EXTRACTOR_JAVASCRIPT_LOG_DIR="${CODEQL_EXTRACTOR_ACTIONS_LOG_DIR}" \
+    CODEQL_EXTRACTOR_JAVASCRIPT_SCRATCH_DIR="${CODEQL_EXTRACTOR_ACTIONS_SCRATCH_DIR}" \
+    CODEQL_EXTRACTOR_JAVASCRIPT_SOURCE_ARCHIVE_DIR="${CODEQL_EXTRACTOR_ACTIONS_SOURCE_ARCHIVE_DIR}" \
+    CODEQL_EXTRACTOR_JAVASCRIPT_TRAP_DIR="${CODEQL_EXTRACTOR_ACTIONS_TRAP_DIR}" \
+    CODEQL_EXTRACTOR_JAVASCRIPT_WIP_DATABASE="${CODEQL_EXTRACTOR_ACTIONS_WIP_DATABASE}" \
+    ${JAVASCRIPT_AUTO_BUILD}
diff --git a/actions/ql/lib/actions.qll b/actions/ql/lib/actions.qll
new file mode 100644
index 000000000000..073277dcace0
--- /dev/null
+++ b/actions/ql/lib/actions.qll
@@ -0,0 +1 @@
+predicate placeholder(int x) { x = 0 }
diff --git a/actions/ql/lib/qlpack.yml b/actions/ql/lib/qlpack.yml
new file mode 100644
index 000000000000..4f674220c885
--- /dev/null
+++ b/actions/ql/lib/qlpack.yml
@@ -0,0 +1,12 @@
+name: codeql/actions-all
+version: 0.0.1-dev
+library: true
+warnOnImplicitThis: true
+dependencies:
+  codeql/util: ${workspace}
+  codeql/yaml: ${workspace}
+  codeql/controlflow: ${workspace}
+  codeql/dataflow: ${workspace}
+  codeql/javascript-all: ${workspace}
+extractor: actions
+groups: actions
diff --git a/actions/ql/src/Placeholder.ql b/actions/ql/src/Placeholder.ql
new file mode 100644
index 000000000000..63e32f04dfb3
--- /dev/null
+++ b/actions/ql/src/Placeholder.ql
@@ -0,0 +1,16 @@
+/**
+ * @name Placeholder Query
+ * @description Placeholder
+ * @kind problem
+ * @problem.severity warning
+ * @security-severity 9.3
+ * @precision high
+ * @id actions/placeholder
+ * @tags actions security
+ */
+
+import actions
+import javascript
+
+from File f
+select f, "Analyzed a file."
diff --git a/actions/ql/src/qlpack.yml b/actions/ql/src/qlpack.yml
new file mode 100644
index 000000000000..0cede827207b
--- /dev/null
+++ b/actions/ql/src/qlpack.yml
@@ -0,0 +1,8 @@
+name: codeql/actions-queries
+version: 0.0.1-dev
+library: false
+groups: [actions, queries]
+extractor: actions
+dependencies:
+  codeql/actions-all: ${workspace}
+warnOnImplicitThis: true
diff --git a/actions/ql/test/library-tests/.github/workflows/shell.yml b/actions/ql/test/library-tests/.github/workflows/shell.yml
new file mode 100644
index 000000000000..9392b81c6ab2
--- /dev/null
+++ b/actions/ql/test/library-tests/.github/workflows/shell.yml
@@ -0,0 +1,23 @@
+on: push
+
+jobs:
+  job1:
+    runs-on: ubuntu-latest
+    steps:
+      - shell: pwsh
+        run: Write-Output "foo"
+  job2:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "foo"
+
+  job3:
+    runs-on: windows-latest
+    steps:
+      - shell: bash
+        run: echo "foo"
+  job4:
+    runs-on: windows-latest
+    steps:
+      - run: Write-Output "foo"
+
diff --git a/actions/ql/test/library-tests/Placeholder.expected b/actions/ql/test/library-tests/Placeholder.expected
new file mode 100644
index 000000000000..2a4f078a25fc
--- /dev/null
+++ b/actions/ql/test/library-tests/Placeholder.expected
@@ -0,0 +1 @@
+| 1 |
diff --git a/actions/ql/test/library-tests/Placeholder.ql b/actions/ql/test/library-tests/Placeholder.ql
new file mode 100644
index 000000000000..82198eaf87be
--- /dev/null
+++ b/actions/ql/test/library-tests/Placeholder.ql
@@ -0,0 +1 @@
+select 1
diff --git a/actions/ql/test/qlpack.yml b/actions/ql/test/qlpack.yml
new file mode 100644
index 000000000000..12711bee904b
--- /dev/null
+++ b/actions/ql/test/qlpack.yml
@@ -0,0 +1,8 @@
+name: codeql/actions-tests
+groups: [codeql, test]
+dependencies:
+  codeql/actions-all: ${workspace}
+  codeql/actions-queries: ${workspace}
+extractor: actions
+tests: .
+warnOnImplicitThis: true
diff --git a/actions/ql/test/query-tests/Placeholder/.github/workflows/shell.yml b/actions/ql/test/query-tests/Placeholder/.github/workflows/shell.yml
new file mode 100644
index 000000000000..9392b81c6ab2
--- /dev/null
+++ b/actions/ql/test/query-tests/Placeholder/.github/workflows/shell.yml
@@ -0,0 +1,23 @@
+on: push
+
+jobs:
+  job1:
+    runs-on: ubuntu-latest
+    steps:
+      - shell: pwsh
+        run: Write-Output "foo"
+  job2:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "foo"
+
+  job3:
+    runs-on: windows-latest
+    steps:
+      - shell: bash
+        run: echo "foo"
+  job4:
+    runs-on: windows-latest
+    steps:
+      - run: Write-Output "foo"
+
diff --git a/actions/ql/test/query-tests/Placeholder/Placeholder.expected b/actions/ql/test/query-tests/Placeholder/Placeholder.expected
new file mode 100644
index 000000000000..46bd70296bd9
--- /dev/null
+++ b/actions/ql/test/query-tests/Placeholder/Placeholder.expected
@@ -0,0 +1 @@
+| .github/workflows/shell.yml:0:0:0:0 | .github/workflows/shell.yml | File |
diff --git a/actions/ql/test/query-tests/Placeholder/Placeholder.qlref b/actions/ql/test/query-tests/Placeholder/Placeholder.qlref
new file mode 100644
index 000000000000..2ad15e688e23
--- /dev/null
+++ b/actions/ql/test/query-tests/Placeholder/Placeholder.qlref
@@ -0,0 +1 @@
+Placeholder.ql