diff --git a/.github/workflows/specassay.yml b/.github/workflows/specassay.yml
index 3268003..d147694 100644
--- a/.github/workflows/specassay.yml
+++ b/.github/workflows/specassay.yml
@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: actions/setup-python@v5
         with:
           python-version: '3.12'
@@ -18,7 +20,16 @@ jobs:
         run: bash .specify/extensions/specassay-check/scripts/check-traceability.sh
       - name: Thread Report
         if: github.event_name == 'pull_request'
-        run: python .specify/extensions/specassay-check/scripts/thread-report.py > thread-report.md || true
+        run: |
+          git show origin/${{ github.base_ref }}:trace-manifest.json > base-manifest.json || echo '{}' > base-manifest.json
+          git diff --name-only origin/${{ github.base_ref }}...HEAD > changed.txt
+          python3 .specify/extensions/specassay-check/scripts/thread-report.py \
+            --base base-manifest.json --head trace-manifest.json \
+            --changed-files changed.txt \
+            --config .specify/extensions/specassay-check/specassay-check-config.yml \
+            --pr-url ${{ github.event.pull_request.html_url }} \
+            --head-sha ${{ github.event.pull_request.head.sha }} \
+            --out thread-report.md
       - name: Post Thread Report
         if: github.event_name == 'pull_request'
         uses: actions/github-script@v7
diff --git a/PRD.md b/PRD.md
index 3118ad2..55d4c53 100644
--- a/PRD.md
+++ b/PRD.md
@@ -1,3 +1,4 @@
 # Insurance Java — Product Requirements
 
 ## Registry
+