diff --git a/.github/workflows/pd.yml b/.github/workflows/pd.yml
index 375a61f59..f310bf444 100644
--- a/.github/workflows/pd.yml
+++ b/.github/workflows/pd.yml
@@ -70,7 +70,6 @@ jobs:
           JSON_CTX: ${{ toJson(github.event.pull_request.labels.*.name) }}
           T1_BRANCH: ${{ github.head_ref || github.ref_name }}
           T1_CONFIG: ${{ matrix.config }}
-          T1_COMMIT: ${{ github.event.pull_request.head.sha }}
           PD_URL: ${{ secrets.T1_INHOUSE_URL }}
         run: |
           # GitHub `toJson` will pretty print JSON and causing multiple line escape issue
@@ -82,11 +81,16 @@ jobs:
             exit 1
           fi
 
+          # Use nix provided locked T1 rev to ensure this is commit the backend script is using
+          _T1_INPUT_URL="github:chipsalliance/t1/${T1_BRANCH}"
+          T1_COMMIT=$(nix flake metadata --override-input t1 "${_T1_INPUT_URL}" --json | jq -r .locks.nodes.t1.locked.rev)
+
           _OUTPUT_DIR="fc_result"
           nix build --impure --out-link ${_OUTPUT_DIR} \
-            --override-input t1 "github:chipsalliance/t1/${T1_BRANCH}" \
+            --override-input t1 "${_T1_INPUT_URL}"\
             "git+https://${GH_TOKEN}@${PD_URL}#prometheus.${T1_CONFIG}.tsn28-run-fc-rm.T1RocketTile"
 
+          # Escape the code block here to avoid bash run command substitution
           _CODE_BLOCK='```'
 
           echo "* Artifacts path: $(realpath ${_OUTPUT_DIR})" >> "$GITHUB_STEP_SUMMARY"
@@ -103,27 +107,47 @@ jobs:
 
           Timing
           ------
+          <details>
+          <summary>Click to open</summary>
+
           ${_CODE_BLOCK}text
           $(cat ${_OUTPUT_DIR}/reports/timing_*.rpt)
           ${_CODE_BLOCK}
 
+          </details>
+
           Area
           ----
+          <details>
+          <summary>Click to open</summary>
+
           ${_CODE_BLOCK}text
           $(cat ${_OUTPUT_DIR}/reports/area.rpt)
           ${_CODE_BLOCK}
 
+          </details>
+
           Power
           -----
+          <details>
+          <summary>Click to open</summary>
+
           ${_CODE_BLOCK}text
           $(cat ${_OUTPUT_DIR}/reports/power.rpt)
           ${_CODE_BLOCK}
 
+          </details>
+
           Logic Level
           -----------
+          <details>
+          <summary>Click to open</summary>
+
           ${_CODE_BLOCK}text
           $(cat ${_OUTPUT_DIR}/reports/logic_levels.rpt)
           ${_CODE_BLOCK}
+
+          </details>
           EOF
       - name: "Comment on PR"
         uses: actions/github-script@v7