fix(fetch-prompt): improve handling of custom prompt file fallback

- Updated the script to prioritize CUSTOM_PROMPT_FILE (set by action.yml) over PROMPT_FILE for local testing.
- Enhanced error messages to provide clearer context on the availability of prompt files.
- Ensured that the existence check reflects the correct variable being used, improving debugging information.

This change aims to streamline the prompt file handling process and improve user feedback during execution.

Author: flowcore-platform

scripts/fetch-prompt.sh

@@ -169,7 +169,9 @@ main() {
     fi
   else
     # Static prompt file
-    CUSTOM_PROMPT_FILE="${PROMPT_FILE:-}"
+    # Use CUSTOM_PROMPT_FILE (set by action.yml) or fall back to PROMPT_FILE (for local testing)
+    CUSTOM_PROMPT_FILE="${CUSTOM_PROMPT_FILE:-${PROMPT_FILE:-}}"
+    
     if [ -n "$CUSTOM_PROMPT_FILE" ] && [ -f "$CUSTOM_PROMPT_FILE" ]; then
       echo "Using static prompt file: $CUSTOM_PROMPT_FILE"
       cp "$CUSTOM_PROMPT_FILE" "$USER_PROMPT_FILE"
@@ -178,8 +180,9 @@ main() {
       echo "Size: $(wc -c < "$USER_PROMPT_FILE") bytes"
     else
       echo "::error::No user prompt file provided or file not found"
+      echo "  CUSTOM_PROMPT_FILE: ${CUSTOM_PROMPT_FILE:-not set}"
       echo "  PROMPT_FILE: ${PROMPT_FILE:-not set}"
-      echo "  File exists: $([ -f "${PROMPT_FILE:-}" ] && echo "yes" || echo "no")"
+      echo "  File exists: $([ -f "${CUSTOM_PROMPT_FILE:-}" ] && echo "yes" || echo "no")"
       exit 1
     fi
   fi