Fix test-finder workflow: Enable developer extension and add token metrics (#4661)

.github/workflows/test-finder.yml

@@ -80,7 +80,7 @@ jobs:
           - Include a descriptive test name that explains what is being tested
           EOF
 
-          goose run -i /tmp/create_working_test.txt
+          goose run -i /tmp/create_working_test.txt --with-builtin developer --path /tmp/goose-home/.local/share/goose/sessions/test_generation.jsonl
 
           # Check the result
           if [ -f /tmp/test_result.txt ]; then
@@ -101,6 +101,20 @@ jobs:
             echo "No result file created"
           fi
 
+      - name: Extract token metrics
+        id: metrics
+        run: |
+          SESSION_FILE="/tmp/goose-home/.local/share/goose/sessions/test_generation.jsonl"
+          if [ -f "$SESSION_FILE" ]; then
+            TOKENS=$(head -1 "$SESSION_FILE" | jq -r '.accumulated_total_tokens // 0')
+            INPUT_TOKENS=$(head -1 "$SESSION_FILE" | jq -r '.accumulated_input_tokens // 0')
+            OUTPUT_TOKENS=$(head -1 "$SESSION_FILE" | jq -r '.accumulated_output_tokens // 0')
+            echo "total_tokens=${TOKENS}" >> $GITHUB_OUTPUT
+            echo "input_tokens=${INPUT_TOKENS}" >> $GITHUB_OUTPUT
+            echo "output_tokens=${OUTPUT_TOKENS}" >> $GITHUB_OUTPUT
+            echo "Token usage - Total: ${TOKENS}, Input: ${INPUT_TOKENS}, Output: ${OUTPUT_TOKENS}"
+          fi
+
       - name: Create Pull Request
         if: steps.find_untested.outputs.patch_created == 'true' && github.event.inputs.dry_run != 'true'
         uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # pin@v7.0.8
@@ -125,6 +139,11 @@ jobs:
             - [ ] Test passes locally
             - [ ] No unnecessary changes included
 
+            ### Metrics
+            - **Total tokens used**: ${{ steps.metrics.outputs.total_tokens }}
+            - **Input tokens**: ${{ steps.metrics.outputs.input_tokens }}
+            - **Output tokens**: ${{ steps.metrics.outputs.output_tokens }}
+
             ---
             *Generated by the Daily Test Coverage Finder workflow*
           branch: goose/test-coverage-${{ github.run_number }}