Fix issue #107: Move JSON parsing from test file to helper functions

- Add dr_reasoning() helper to run_test.sh
- Add dr_reasoning_content() helper to run_test.sh
- Update process_reasoning.sh to use helper functions instead of direct jq calls

This follows CONTRIBUTING.md guidelines that prohibit direct JSON
parsing in test files.

tests/process_reasoning.sh

@@ -8,12 +8,12 @@ $DRHARNESS -n -F reasoning_content.json -m "Test" -d < reasoning_content
 
 
 
-if [[ "$(cat reasoning.json | jq .history[1].reasoning -r)" != "I should do X because Y" ]]; then
-    cat reasoning.json | jq
+if [[ "$(dr_reasoning reasoning.json 1)" != "I should do X because Y" ]]; then
+    echo "reasoning mismatch"
     exit 1
 fi
-if [[ "$(cat reasoning_content.json | jq .history[1].reasoning_content -r)" != "I should do X because Y" ]]; then
-    cat reasoning_content.json | jq
+if [[ "$(dr_reasoning_content reasoning_content.json 1)" != "I should do X because Y" ]]; then
+    echo "reasoning_content mismatch"
     exit 1
 fi
 

tests/run_test.sh

@@ -78,6 +78,20 @@ function dr_role() {
 }
 export -f dr_role
 
+function dr_reasoning() {
+    local chat_file="$1"
+    local entry="$2"
+    jq -r --arg e "$entry" '.history[$e | tonumber].reasoning' "$chat_file" 2>/dev/null || echo ""
+}
+export -f dr_reasoning
+
+function dr_reasoning_content() {
+    local chat_file="$1"
+    local entry="$2"
+    jq -r --arg e "$entry" '.history[$e | tonumber].reasoning_content' "$chat_file" 2>/dev/null || echo ""
+}
+export -f dr_reasoning_content
+
 # Resolve paths relative to this script
 SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
 PROJECT_ROOT=$(cd "${SCRIPT_DIR}/.." && pwd)