diff --git a/.github/actions/portable-build-cache/action.yml b/.github/actions/portable-build-cache/action.yml
index cee775ec5..799b9476b 100644
--- a/.github/actions/portable-build-cache/action.yml
+++ b/.github/actions/portable-build-cache/action.yml
@@ -12,7 +12,7 @@ runs:
   steps:
     - name: Download portable build outputs from this workflow run
       if: inputs.build_cache_artifact != ''
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
       with:
         name: ${{ inputs.build_cache_artifact }}
         path: .turbo/cache/
@@ -39,14 +39,14 @@ runs:
           ' >> "$GITHUB_OUTPUT"
     - name: Restore portable build outputs
       if: inputs.build_cache_artifact == '' && inputs.save != 'true'
-      uses: actions/cache/restore@v4
+      uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
       with:
         path: .turbo/cache/
         key: ${{ steps.plan.outputs.key }}
         restore-keys: ${{ steps.plan.outputs.prefix }}
     - name: Restore and save portable build outputs
       if: inputs.build_cache_artifact == '' && inputs.save == 'true'
-      uses: actions/cache@v4
+      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
       with:
         path: .turbo/cache/
         key: ${{ steps.plan.outputs.key }}
diff --git a/.github/workflows/ci-timings.yml b/.github/workflows/ci-timings.yml
index 30fa19464..73a9ba4b9 100644
--- a/.github/workflows/ci-timings.yml
+++ b/.github/workflows/ci-timings.yml
@@ -20,11 +20,11 @@ jobs:
     timeout-minutes: 5
     steps:
       # Consume only API data and execute batch code from the trusted default branch.
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ github.event.repository.default_branch }}
           persist-credentials: false
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Record queue, execution, and matched step timing
@@ -36,7 +36,7 @@ jobs:
       - name: Upload CI timing artifacts
         if: always() && hashFiles('.cache/ci-job-timings/*') != ''
         continue-on-error: true
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: ci-job-timings-batch
           path: .cache/ci-job-timings/
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d2cc59493..142e179bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,11 +63,11 @@ jobs:
       matrix: ${{ steps.plan.outputs.matrix }}
       test_selection: ${{ steps.plan.outputs.test_selection }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           ref: ${{ inputs.source_sha || github.sha }}
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Bind qualification to the caller revision
@@ -118,8 +118,8 @@ jobs:
         env:
           CHANGES_RESULT: ${{ needs.changes.result }}
         run: test "${CHANGES_RESULT}" = "success"
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -138,7 +138,7 @@ jobs:
         run: npm run format:check
       - name: Upload complete static diagnostics
         if: always() && needs.changes.outputs.code == 'true'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: static-check-reports
           path: .cache/static-checks/
@@ -157,13 +157,13 @@ jobs:
       matrix:
         shard: [1/6, 2/6, 3/6, 4/6, 5/6, 6/6]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: rea-test-runtime
           path: .
@@ -177,7 +177,7 @@ jobs:
         run: npm run test:run -- --reporter=default --reporter=blob --shard=${{ matrix.shard }}
         env:
           REA_CI_TEST_HISTORY: .cache/ci-test-history/test-results.json
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         if: ${{ !cancelled() }}
         with:
           name: vitest-report-${{ strategy.job-index }}
@@ -208,8 +208,8 @@ jobs:
       contents: read
       actions: read
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -231,13 +231,13 @@ jobs:
       - name: Download previous timing report
         if: steps.history.outputs.run-id != ''
         continue-on-error: true
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: test-timings
           run-id: ${{ steps.history.outputs.run-id }}
           github-token: ${{ github.token }}
           path: .cache/ci-test-history
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: rea-test-runtime
           path: |
@@ -254,7 +254,7 @@ jobs:
       # test:prepare caches only portable JS, skill, and catalog outputs.
       # Native package jobs still run their build and prepack checks; Turbo
       # restores matching outputs or rebuilds when their inputs differ.
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: rea-build-cache
           path: .turbo/cache/
@@ -280,16 +280,16 @@ jobs:
         env:
           CHANGES_RESULT: ${{ needs.changes.result }}
         run: test "${CHANGES_RESULT}" = "success"
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         if: needs.changes.outputs.code == 'true' && success()
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         if: needs.changes.outputs.code == 'true' && success()
         with:
           node-version-file: .nvmrc
           cache: npm
       - if: needs.changes.outputs.code == 'true' && success()
         run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         if: needs.changes.outputs.code == 'true' && success()
         with:
           path: .vitest/blob
@@ -330,7 +330,7 @@ jobs:
           CI_TEST_SELECTION: ${{ needs.changes.outputs.test_selection }}
           CI_PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: node scripts/ci/test-report.mjs
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         if: needs.changes.outputs.code == 'true' && !cancelled() && hashFiles('test-results.json') != ''
         with:
           name: test-results
@@ -345,7 +345,7 @@ jobs:
           retention-days: 30
       - name: Publish successful timing history
         if: needs.changes.outputs.code == 'true' && needs.changes.outputs.tier == 'full' && success() && needs.test-shard.result == 'success'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: test-timings
           path: .cache/ci-test-history/test-results.json
@@ -366,7 +366,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Verify fixtures from a clean checkout
         run: npm run verify:fixtures
 
@@ -377,8 +377,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Prepare cross compiler
@@ -395,12 +395,12 @@ jobs:
       - run: npm run build:windows-native
       - run: npm run verify:windows-native:artifact
       - run: node scripts/build-windows-native.mjs --inspection-fixture
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: windows-native-inspection-fixture
           path: .cache/windows-native-inspection-fixture/
           if-no-files-found: error
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: windows-native-controls
           path: native/windows/build/
@@ -423,8 +423,8 @@ jobs:
       NODE_OPTIONS: "--max-old-space-size=1024"
       UV_THREADPOOL_SIZE: "2"
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -438,11 +438,11 @@ jobs:
           assert.equal(process.arch, process.env.EXPECTED_CI_ARCHITECTURE);
           console.log(JSON.stringify({ platform: process.platform, architecture: process.arch, node: process.version }));"
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: rea-build-cache
           path: .turbo/cache/
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: windows-native-controls
           path: native/windows/build/
@@ -463,7 +463,7 @@ jobs:
         run: npm run verify:inspector
       - name: Retain the exact qualified release package
         if: needs.changes.outputs.tier == 'full' && matrix.platform == 'linux' && matrix.architecture == 'x64'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: verified-release-package
           path: .cache/verified-package/
@@ -479,13 +479,13 @@ jobs:
     runs-on: macos-15
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: rea-build-cache
           path: .turbo/cache/
@@ -527,8 +527,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -539,7 +539,7 @@ jobs:
         run: |
           set -o pipefail
           npm run verify:readiness | tee readiness-summary.json
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         if: ${{ !cancelled() }}
         with:
           name: reconstruction-readiness
@@ -556,18 +556,18 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 25
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: rea-build-cache
           path: .turbo/cache/
       - run: npm run build:cached
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: windows-native-controls
           path: native/windows/build/
@@ -623,7 +623,7 @@ jobs:
           tests/process-global/updateMaintenance.test.ts
           tests/conformance/providers/ghidra/realGhidraWindowsWorkflow.test.ts
       - run: npm run verify:windows-native
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: windows-native-inspection-fixture
           path: .cache/windows-native-inspection-fixture/
@@ -642,7 +642,7 @@ jobs:
           tests/boundary/filesystem/directoryArtifactReaderOpen.test.ts
           tests/boundary/filesystem/javascriptPackagePrecedence.test.ts
           tests/boundary/filesystem/javascriptArtifactContentIdentity.test.ts
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 22.19.0
       - name: Verify native path boundaries on Node 22
@@ -652,7 +652,7 @@ jobs:
           tests/boundary/filesystem/javascriptPackagePrecedence.test.ts
           tests/boundary/filesystem/javascriptArtifactContentIdentity.test.ts
           tests/boundary/process/sourceMapUncHosts.test.ts
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         if: always()
         with:
           name: windows-capabilities
@@ -666,8 +666,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -675,7 +675,7 @@ jobs:
       - run: npm run docs:check
       - name: Generation leaves authored files unchanged
         run: git diff --exit-code
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: generated-docs
           path: |
@@ -782,8 +782,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Require every selected lane to pass
@@ -794,7 +794,7 @@ jobs:
         run: node scripts/ci/required.mjs
       - name: Upload full qualification receipt artifact
         if: needs.changes.outputs.tier == 'full' && success()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: ${{ steps.gate.outputs.receipt_name }}
           path: ${{ steps.gate.outputs.receipt_path }}
diff --git a/.github/workflows/nativeaot-fixtures.yml b/.github/workflows/nativeaot-fixtures.yml
index ce7dc1ea1..b2cc5801f 100644
--- a/.github/workflows/nativeaot-fixtures.yml
+++ b/.github/workflows/nativeaot-fixtures.yml
@@ -19,16 +19,16 @@ jobs:
       DOTNET_PROCESSOR_COUNT: "1"
       COMPlus_GCHeapHardLimit: "30000000"
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9 # v4.3.1
         with:
           dotnet-version: "8.0.416"
       - name: Build benign fixture and independent byte oracle
         run: node scripts/generate-nativeaot-fixtures.mjs
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: nativeaot-win-x64-${{ github.event.pull_request.head.sha || github.sha }}
           path: |
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index e276a9f0d..6b8a05b46 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -19,8 +19,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-binary-layout.yml b/.github/workflows/real-binary-layout.yml
index 5cec952ce..0218543f0 100644
--- a/.github/workflows/real-binary-layout.yml
+++ b/.github/workflows/real-binary-layout.yml
@@ -28,8 +28,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-browser.yml b/.github/workflows/real-browser.yml
index 912fdafb1..3c3fe955a 100644
--- a/.github/workflows/real-browser.yml
+++ b/.github/workflows/real-browser.yml
@@ -21,8 +21,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-evm-interface.yml b/.github/workflows/real-evm-interface.yml
index dfdd3970f..6e510c973 100644
--- a/.github/workflows/real-evm-interface.yml
+++ b/.github/workflows/real-evm-interface.yml
@@ -22,8 +22,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-ghidra-windows.yml b/.github/workflows/real-ghidra-windows.yml
index d6de7469f..db92cd0f8 100644
--- a/.github/workflows/real-ghidra-windows.yml
+++ b/.github/workflows/real-ghidra-windows.yml
@@ -16,8 +16,8 @@ jobs:
     if: github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Prepare cross compiler
@@ -31,7 +31,7 @@ jobs:
           sudo apt-get install --no-install-recommends -y g++-mingw-w64-x86-64
       - run: npm run build:windows-native
       - run: npm run verify:windows-native:artifact
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: real-ghidra-windows-native
           path: native/windows/build/
@@ -45,12 +45,12 @@ jobs:
     runs-on: [self-hosted, Windows, x64, ghidra-12-1-2]
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: real-ghidra-windows-native
           path: native/windows/build/
@@ -88,7 +88,7 @@ jobs:
         env:
           REA_ANALYSIS_PROVIDER: ghidra
         run: npm run verify:ghidra:windows:package -- --x86 --dll | Tee-Object -FilePath windows-ghidra-x86-dll-package-proof.log
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         if: always()
         with:
           name: windows-ghidra-proof
diff --git a/.github/workflows/real-go-binary.yml b/.github/workflows/real-go-binary.yml
index b886bd70a..c7d74b001 100644
--- a/.github/workflows/real-go-binary.yml
+++ b/.github/workflows/real-go-binary.yml
@@ -44,12 +44,12 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
           go-version: "1.26.1"
           cache: false
diff --git a/.github/workflows/real-hopper-linux.yml b/.github/workflows/real-hopper-linux.yml
index 2355229de..d5e5f8c33 100644
--- a/.github/workflows/real-hopper-linux.yml
+++ b/.github/workflows/real-hopper-linux.yml
@@ -15,8 +15,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 25
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
@@ -36,8 +36,8 @@ jobs:
     runs-on: [self-hosted, Linux, hopper]
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-hopper.yml b/.github/workflows/real-hopper.yml
index 51135f4b6..b3ceeb7d9 100644
--- a/.github/workflows/real-hopper.yml
+++ b/.github/workflows/real-hopper.yml
@@ -15,8 +15,8 @@ jobs:
     runs-on: [self-hosted, macOS, hopper]
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-javascript-recovery.yml b/.github/workflows/real-javascript-recovery.yml
index 817dc4dc0..a5043b62e 100644
--- a/.github/workflows/real-javascript-recovery.yml
+++ b/.github/workflows/real-javascript-recovery.yml
@@ -23,8 +23,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-packet-capture.yml b/.github/workflows/real-packet-capture.yml
index b5e9f9201..8daebfd8a 100644
--- a/.github/workflows/real-packet-capture.yml
+++ b/.github/workflows/real-packet-capture.yml
@@ -43,8 +43,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-recorded-crash.yml b/.github/workflows/real-recorded-crash.yml
index 04467a608..0463df27d 100644
--- a/.github/workflows/real-recorded-crash.yml
+++ b/.github/workflows/real-recorded-crash.yml
@@ -25,8 +25,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-signal-recording.yml b/.github/workflows/real-signal-recording.yml
index cc902037e..5c1380e2d 100644
--- a/.github/workflows/real-signal-recording.yml
+++ b/.github/workflows/real-signal-recording.yml
@@ -36,8 +36,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-termux.yml b/.github/workflows/real-termux.yml
index 204acc1c6..e6f3890e1 100644
--- a/.github/workflows/real-termux.yml
+++ b/.github/workflows/real-termux.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 45
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Download the pinned Termux app and verify its release checksum
         shell: bash
         run: |
@@ -38,7 +38,7 @@ jobs:
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
       - name: Build and capture a page inside Termux
-        uses: reactivecircus/android-emulator-runner@4c44018e59b437e86cdfc41da381398f93ed8808 # v2
+        uses: reactivecircus/android-emulator-runner@a421e43855164a8197daf9d8d40fe71c6996bb0d # v2.38.0
         with:
           api-level: 30
           arch: x86_64
@@ -50,7 +50,7 @@ jobs:
           script: bash scripts/verify/termux/emulator.sh
       - name: Upload Termux and Android diagnostics
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: termux-browser-diagnostics
           path: ${{ runner.temp }}/rea-termux/diagnostics
diff --git a/.github/workflows/real-web-network-captures.yml b/.github/workflows/real-web-network-captures.yml
index d41bb37a5..3ee59d2c8 100644
--- a/.github/workflows/real-web-network-captures.yml
+++ b/.github/workflows/real-web-network-captures.yml
@@ -22,8 +22,8 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-web-runtime.yml b/.github/workflows/real-web-runtime.yml
index 2575c55f9..f5b9f201a 100644
--- a/.github/workflows/real-web-runtime.yml
+++ b/.github/workflows/real-web-runtime.yml
@@ -17,8 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/real-web-source-map.yml b/.github/workflows/real-web-source-map.yml
index 8e0869eb7..2a1e65dc0 100644
--- a/.github/workflows/real-web-source-map.yml
+++ b/.github/workflows/real-web-source-map.yml
@@ -17,8 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
           cache: npm
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7cc798cfa..61e39d029 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -48,7 +48,7 @@ jobs:
             echo "frozen=true" >> "$GITHUB_OUTPUT"
           fi
 
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@5c625bfb5d1ff62eadeeb3772007f7f66fdcf071 # v4.4.1
         if: steps.editorial.outputs.frozen != 'true'
         with:
           token: ${{ secrets.RELEASE_PLEASE_TOKEN || secrets.GITHUB_TOKEN }}
@@ -70,13 +70,13 @@ jobs:
       sha: ${{ steps.release.outputs.sha }}
     steps:
       - name: Check out reviewed release merge
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
           fetch-depth: 0
           persist-credentials: false
 
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: .nvmrc
           package-manager-cache: false
@@ -104,7 +104,7 @@ jobs:
           node scripts/release-notes.mjs publication --repository "$GH_REPO" \
             --source "$SOURCE_SHA" --pr "$RELEASE_PR"
 
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@5c625bfb5d1ff62eadeeb3772007f7f66fdcf071 # v4.4.1
         id: release
         with:
           token: ${{ secrets.RELEASE_PLEASE_TOKEN || secrets.GITHUB_TOKEN }}
@@ -191,14 +191,14 @@ jobs:
           fi
 
       - name: Check out release controller and Git history
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           ref: ${{ github.sha }}
           fetch-depth: 0
           persist-credentials: false
 
       - name: Set up Node.js for checkpoint validation
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: .nvmrc
           package-manager-cache: false
@@ -226,7 +226,7 @@ jobs:
           node scripts/release-notes.mjs publication --repository "$GH_REPO" \
             --source "$SOURCE_SHA"
 
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@5c625bfb5d1ff62eadeeb3772007f7f66fdcf071 # v4.4.1
         id: release
         with:
           # A dedicated credential starts PR CI automatically; the built-in
@@ -255,7 +255,7 @@ jobs:
 
       - name: Check out release pull request
         if: inputs.phase == 'prepare' && steps.release.outputs.prs_created == 'true'
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           ref: ${{ fromJSON(steps.release.outputs.pr).headBranchName }}
           fetch-depth: 0
@@ -263,7 +263,7 @@ jobs:
 
       - name: Set up Node.js for generated documentation
         if: inputs.phase == 'prepare' && steps.release.outputs.prs_created == 'true'
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: .nvmrc
           package-manager-cache: false
@@ -314,12 +314,12 @@ jobs:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           ref: ${{ needs.merged-release.outputs.sha || needs.release-please.outputs.sha }}
           persist-credentials: false
 
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: .nvmrc
           package-manager-cache: false
@@ -328,7 +328,7 @@ jobs:
       - run: npm ci
 
       - name: Download the exact qualified package
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: verified-release-package
           path: .cache/verified-package/
@@ -392,7 +392,7 @@ jobs:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           ref: ${{ needs.merged-release.outputs.sha || needs.release-please.outputs.sha }}
           persist-credentials: false
diff --git a/.github/workflows/sqlite-runtime.yml b/.github/workflows/sqlite-runtime.yml
index 6e5bbcd10..fc379d1dc 100644
--- a/.github/workflows/sqlite-runtime.yml
+++ b/.github/workflows/sqlite-runtime.yml
@@ -22,14 +22,14 @@ jobs:
         # The repository-pinned Node 24 version also runs the complete test suite.
         node: ["22.x", "24.15.0", "24.x", "26.x"]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: ${{ matrix.node }}
           check-latest: true
           cache: npm
       - run: npm ci
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: rea-test-runtime
           path: .
diff --git a/.github/workflows/website-check.yml b/.github/workflows/website-check.yml
index 2a2c5406f..dc17b4b96 100644
--- a/.github/workflows/website-check.yml
+++ b/.github/workflows/website-check.yml
@@ -14,9 +14,9 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Set up Python for website assets
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.12"
           cache: pip
diff --git a/.github/workflows/website-pages.yml b/.github/workflows/website-pages.yml
index 3c2251658..491b028a6 100644
--- a/.github/workflows/website-pages.yml
+++ b/.github/workflows/website-pages.yml
@@ -47,9 +47,9 @@ jobs:
             exit 1
           fi
       - name: Check out the repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Set up Python for website assets
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.12"
           cache: pip
@@ -74,9 +74,9 @@ jobs:
           )
           PY
       - name: Configure Pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0
       - name: Upload the website
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
         with:
           path: website/_site
 
@@ -95,15 +95,15 @@ jobs:
     steps:
       - name: Check out publishing configuration
         if: inputs.target == 'both'
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       - name: Set up Node.js for Wrangler
         if: inputs.target == 'both'
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version-file: .nvmrc
       - name: Download the verified website
         if: inputs.target == 'both'
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: github-pages
           path: ${{ runner.temp }}/website-archive
@@ -114,7 +114,7 @@ jobs:
           tar -xf "$RUNNER_TEMP/website-archive/artifact.tar" -C "$RUNNER_TEMP/rea-website-public"
       - name: Publish the website to Cloudflare
         if: inputs.target == 'both'
-        uses: cloudflare/wrangler-action@v4
+        uses: cloudflare/wrangler-action@953926a2e2182532811c01a25e53647d93bf07c0 # v4.1.3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
@@ -123,7 +123,7 @@ jobs:
           command: deploy --cwd website --env production --assets "${{ runner.temp }}/rea-website-public"
       - name: Publish to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5
       - name: Verify the selected published revisions
         env:
           PAGES_URL: ${{ steps.deployment.outputs.page_url }}
diff --git a/tests/boundary/filesystem/ciRequiredLanes.test.ts b/tests/boundary/filesystem/ciRequiredLanes.test.ts
index b6e02b54a..da6c43186 100644
--- a/tests/boundary/filesystem/ciRequiredLanes.test.ts
+++ b/tests/boundary/filesystem/ciRequiredLanes.test.ts
@@ -262,8 +262,8 @@ it("binds provider build reuse to the current run while keeping standalone dispa
         ),
       ),
     );
-  const download = action.runs.steps.find(
-    (step) => step.uses === "actions/download-artifact@v4",
+  const download = action.runs.steps.find((step) =>
+    step.uses?.startsWith("actions/download-artifact@"),
   );
   expect(download?.with).toEqual({
     name: "${{ inputs.build_cache_artifact }}",
diff --git a/tests/conformance/providers/ghidra/realGhidraWindowsWorkflow.test.ts b/tests/conformance/providers/ghidra/realGhidraWindowsWorkflow.test.ts
index 39eb8ff61..0e936b062 100644
--- a/tests/conformance/providers/ghidra/realGhidraWindowsWorkflow.test.ts
+++ b/tests/conformance/providers/ghidra/realGhidraWindowsWorkflow.test.ts
@@ -26,14 +26,18 @@ describe("real Windows Ghidra workflow trust boundary", () => {
           environment: "real-ghidra-windows",
           "runs-on": expect.arrayContaining(["self-hosted", "Windows", "x64"]),
           steps: expect.arrayContaining([
-            expect.objectContaining({ uses: "actions/setup-node@v4" }),
+            expect.objectContaining({
+              uses: expect.stringMatching(/^actions\/setup-node@[0-9a-f]{40}$/),
+            }),
             expect.objectContaining({ run: "npm ci" }),
             expect.objectContaining({
               env: { REA_ANALYSIS_PROVIDER: "ghidra" },
               run: "npm run verify:ghidra:windows | Tee-Object -FilePath windows-ghidra-proof.log",
             }),
             expect.objectContaining({
-              uses: "actions/upload-artifact@v4",
+              uses: expect.stringMatching(
+                /^actions\/upload-artifact@[0-9a-f]{40}$/,
+              ),
               with: expect.objectContaining({
                 path: expect.stringContaining("windows-ghidra-proof.log"),
               }),