Updated exit codes with clearer message.

Author: megha1188

action.yml

@@ -290,13 +290,16 @@ runs:
         FAILED=false
 
         # Run Gemini CLI with the provided prompt, streaming responses in debug
+        EXIT_CODE=0
         if [[ "${DEBUG}" = true ]]; then
           echo "::warning::Gemini CLI debug logging is enabled. This will stream responses, which could reveal sensitive information if processed with untrusted inputs."
           if ! { gemini --yolo --prompt "${PROMPT}" 2> >(tee "${TEMP_STDERR}" >&2) | tee "${TEMP_STDOUT}"; }; then
+            EXIT_CODE=$?
             FAILED=true
           fi
         else
           if ! gemini --yolo --prompt "${PROMPT}" 2> "${TEMP_STDERR}" 1> "${TEMP_STDOUT}"; then
+            EXIT_CODE=$?
             FAILED=true
           fi
         fi
@@ -323,10 +326,39 @@ runs:
         echo "EOF" >> "${GITHUB_OUTPUT}"
 
         if [[ "${FAILED}" = true ]]; then
+          case "${EXIT_CODE}" in
+            1)
+              MSG="General error"
+              ;;
+            41)
+              MSG="Authentication failure. Please check your credentials (API key or Google Cloud auth)."
+              ;;
+            42)
+              MSG="Invalid input or configuration. Please check your prompt or CLI arguments."
+              ;;
+            52)
+              MSG="Configuration error. Failed to save settings."
+              ;;
+            53)
+              MSG="Turn limit exceeded. The conversation has reached its maximum length."
+              ;;
+            126)
+              MSG="Command invoked cannot execute"
+              ;;
+            127)
+              MSG="Command not found"
+              ;;
+            130)
+              MSG="User cancelled. The operation was interrupted."
+              ;;
+            *)
+              MSG="Unknown error (exit code: ${EXIT_CODE})"
+          esac
+          
           LAST_LINE="$(tail -n1 "${TEMP_STDERR}")"
-          echo "::error title=Gemini CLI execution failed::${LAST_LINE}"
+          printf "::error title=Gemini CLI execution failed (%s)::%s\n" "${MSG}" "${LAST_LINE}"
           echo "See logs for more details"
-          exit 1
+          exit "${EXIT_CODE}"
         fi
       env:
         DEBUG: '${{ fromJSON(inputs.gemini_debug || false) }}'