diff --git a/.azure-pipelines/scripts/compare-typescript-pr-dt.sh b/.azure-pipelines/scripts/compare-typescript-pr-dt.sh
new file mode 100644
index 0000000000..c3a01e46ad
--- /dev/null
+++ b/.azure-pipelines/scripts/compare-typescript-pr-dt.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+: "${PIPELINE_WORKSPACE:?}"
+
+pr_errors="$PIPELINE_WORKSPACE/pr/errors.txt"
+main_errors="$PIPELINE_WORKSPACE/main/errors.txt"
+
+echo
+echo "=== Errors only in main ==="
+diff --changed-group-format='%<' --unchanged-group-format='' "$main_errors" "$pr_errors" | grep -Ev '^(===|[12]>)' || true
+
+echo
+echo "=== Errors only in branch ==="
+diff --changed-group-format='%>' --unchanged-group-format='' "$main_errors" "$pr_errors" | grep -Ev '^(===|[12]>)' || true
diff --git a/.azure-pipelines/scripts/run-typescript-pr-dt.sh b/.azure-pipelines/scripts/run-typescript-pr-dt.sh
index 09f3a7c623..e17955a561 100644
--- a/.azure-pipelines/scripts/run-typescript-pr-dt.sh
+++ b/.azure-pipelines/scripts/run-typescript-pr-dt.sh
@@ -2,95 +2,45 @@
 
 set -euo pipefail
 
-: "${EXPECTED_BASE_SHA:?}"
-: "${EXPECTED_HEAD_SHA:?}"
-: "${EXPECTED_MERGE_SHA:?}"
 : "${PIPELINE_WORKSPACE:?}"
 : "${SHARD_COUNT:?}"
 : "${SHARD_ID:?}"
 
-typescript_path="$PIPELINE_WORKSPACE/s/TypeScript"
-actual_merge_sha=$(git -C "$typescript_path" rev-parse HEAD)
-actual_base_sha=$(git -C "$typescript_path" rev-parse HEAD^1)
-actual_head_sha=$(git -C "$typescript_path" rev-parse HEAD^2)
-
-verify_sha() {
-    local label=$1
-    local actual=$2
-    local expected=$3
-    if [[ "$actual" != "$expected" ]]; then
-        echo "$label SHA mismatch: expected $expected, got $actual" >&2
+label=${1:?Usage: $0 PR|main}
+case "$label" in
+    PR)
+        root="$PIPELINE_WORKSPACE/pr"
+        failures="$root/prFailures${SHARD_ID}.json"
+        ;;
+    main)
+        root="$PIPELINE_WORKSPACE/main"
+        failures="$root/mainFailures${SHARD_ID}.json"
+        ;;
+    *)
+        echo "Unknown run label: $label" >&2
         exit 1
-    fi
-}
-
-verify_sha merge "$actual_merge_sha" "$EXPECTED_MERGE_SHA"
-verify_sha base "$actual_base_sha" "$EXPECTED_BASE_SHA"
-verify_sha head "$actual_head_sha" "$EXPECTED_HEAD_SHA"
-
-build_typescript() {
-    npm ci
-    npm run build
-    npx hereby build:api
-}
-
-run_dtslint() {
-    local label=$1
-    local root=$2
-    local failures=$3
-    local errors="$root/errors.txt"
+        ;;
+esac
 
-    mkdir -p "$root"
-    echo "$label run: Shard $SHARD_ID of $SHARD_COUNT"
-
-    pushd "$dt_path" >/dev/null
-    set +o pipefail
-    pnpm dtslint-runner \
-        --path . \
-        --localTypeScriptPath "$local_typescript_path" \
-        --selection all \
-        --expectOnly \
-        --shardId "$SHARD_ID" \
-        --shardCount "$SHARD_COUNT" \
-        --writeFailures "$failures" 3>&1 1>&2 2>&3 | tee -a "$errors"
-    set -o pipefail
-    popd >/dev/null
-}
-
-pushd "$typescript_path" >/dev/null
-build_typescript
-popd >/dev/null
+tools_path="$PIPELINE_WORKSPACE/s/DefinitelyTyped-tools"
+typescript_path="$PIPELINE_WORKSPACE/s/TypeScript"
 local_typescript_path="$typescript_path/packages/typescript"
-
 dt_path="$PIPELINE_WORKSPACE/s/DefinitelyTyped"
-pushd "$dt_path" >/dev/null
-npm install --global "$(jq -r '.packageManager' package.json)"
-pnpm install
-popd >/dev/null
+errors="$root/errors.txt"
 
-run_dtslint \
-    PR \
-    "$PIPELINE_WORKSPACE/pr" \
-    "$PIPELINE_WORKSPACE/pr/prFailures${SHARD_ID}.json"
+mkdir -p "$root"
+echo "$label run: Shard $SHARD_ID of $SHARD_COUNT"
+echo "dtslint runner: $tools_path/packages/dtslint-runner/dist/index.js"
 
-git -C "$typescript_path" clean -xdf
-git -C "$typescript_path" switch --detach "$EXPECTED_BASE_SHA"
-pushd "$typescript_path" >/dev/null
-build_typescript
+pushd "$dt_path" >/dev/null
+set +o pipefail
+node "$tools_path/packages/dtslint-runner/dist/index.js" \
+    --path . \
+    --localTypeScriptPath "$local_typescript_path" \
+    --selection all \
+    --expectOnly \
+    --shardId "$SHARD_ID" \
+    --shardCount "$SHARD_COUNT" \
+    --writeFailures "$failures" 3>&1 1>&2 2>&3 | tee -a "$errors"
+set -o pipefail
 popd >/dev/null
-
-run_dtslint \
-    main \
-    "$PIPELINE_WORKSPACE/main" \
-    "$PIPELINE_WORKSPACE/main/mainFailures${SHARD_ID}.json"
-
-pr_errors="$PIPELINE_WORKSPACE/pr/errors.txt"
-main_errors="$PIPELINE_WORKSPACE/main/errors.txt"
-
-echo
-echo "=== Errors only in main ==="
-diff --changed-group-format='%<' --unchanged-group-format='' "$main_errors" "$pr_errors" | grep -Ev '^(===|[12]>)' || true
-
-echo
-echo "=== Errors only in branch ==="
-diff --changed-group-format='%>' --unchanged-group-format='' "$main_errors" "$pr_errors" | grep -Ev '^(===|[12]>)' || true
diff --git a/.azure-pipelines/typescript-pr-dt.yml b/.azure-pipelines/typescript-pr-dt.yml
index 016c20cdb4..0d9a21d14d 100644
--- a/.azure-pipelines/typescript-pr-dt.yml
+++ b/.azure-pipelines/typescript-pr-dt.yml
@@ -88,16 +88,94 @@ jobs:
           version: "1.27"
           goDownloadUrl: https://aka.ms/golang/release/latest
 
-      - bash: bash .azure-pipelines/scripts/run-typescript-pr-dt.sh
-        displayName: Run TypeScript PR DT comparison
-        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+      - bash: |
+          set -euo pipefail
+          verify_sha() {
+            local label=$1
+            local actual=$2
+            local expected=$3
+            if [[ "$actual" != "$expected" ]]; then
+              echo "$label SHA mismatch: expected $expected, got $actual" >&2
+              exit 1
+            fi
+          }
+          verify_sha merge "$(git rev-parse HEAD)" "$EXPECTED_MERGE_SHA"
+          verify_sha base "$(git rev-parse HEAD^1)" "$EXPECTED_BASE_SHA"
+          verify_sha head "$(git rev-parse HEAD^2)" "$EXPECTED_HEAD_SHA"
+        displayName: Verify TypeScript checkout
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
         env:
           EXPECTED_BASE_SHA: ${{ parameters.expected_base_sha }}
           EXPECTED_HEAD_SHA: ${{ parameters.expected_head_sha }}
           EXPECTED_MERGE_SHA: ${{ parameters.expected_merge_sha }}
+
+      - bash: |
+          set -euo pipefail
+          npm install --global "$(jq -r '.packageManager' package.json)"
+          pnpm install --frozen-lockfile
+        displayName: Install DefinitelyTyped tools dependencies
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+
+      - bash: pnpm build
+        displayName: Build DefinitelyTyped tools
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+
+      - bash: npm ci
+        displayName: Install PR TypeScript dependencies
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
+
+      - bash: |
+          set -euo pipefail
+          npm run build
+          npx hereby build:api
+        displayName: Build PR TypeScript
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
+
+      - bash: |
+          set -euo pipefail
+          npm install --global "$(jq -r '.packageManager' package.json)"
+          pnpm install
+        displayName: Install DefinitelyTyped dependencies
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped
+
+      - bash: bash .azure-pipelines/scripts/run-typescript-pr-dt.sh PR
+        displayName: Run dtslint with PR TypeScript
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+        env:
           SHARD_COUNT: $(System.TotalJobsInPhase)
           SHARD_ID: $(System.JobPositionInPhase)
 
+      - bash: |
+          set -euo pipefail
+          git clean -xdf
+          git switch --detach "$EXPECTED_BASE_SHA"
+        displayName: Prepare base TypeScript checkout
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
+        env:
+          EXPECTED_BASE_SHA: ${{ parameters.expected_base_sha }}
+
+      - bash: npm ci
+        displayName: Install base TypeScript dependencies
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
+
+      - bash: |
+          set -euo pipefail
+          npm run build
+          npx hereby build:api
+        displayName: Build base TypeScript
+        workingDirectory: $(Pipeline.Workspace)/s/TypeScript
+
+      - bash: bash .azure-pipelines/scripts/run-typescript-pr-dt.sh main
+        displayName: Run dtslint with base TypeScript
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+        env:
+          SHARD_COUNT: $(System.TotalJobsInPhase)
+          SHARD_ID: $(System.JobPositionInPhase)
+
+      - bash: bash .azure-pipelines/scripts/compare-typescript-pr-dt.sh
+        displayName: Compare dtslint logs
+        workingDirectory: $(Pipeline.Workspace)/s/DefinitelyTyped-tools
+
       - publish: $(Pipeline.Workspace)/pr/prFailures$(System.JobPositionInPhase).json
         displayName: Publish PR failures
         artifact: prFailures$(System.JobPositionInPhase)