diff --git a/pipelines/monolithic.Jenkinsfile b/pipelines/monolithic.Jenkinsfile
index af89512..3048f4b 100644
--- a/pipelines/monolithic.Jenkinsfile
+++ b/pipelines/monolithic.Jenkinsfile
@@ -8,40 +8,54 @@
 
 library "common@${params.JENKINS_SCRIPTS_BRANCH}"
 
-PROPS = null
-IMG_PARAMS = null
-IMAGES_FAILED = false
+// Pipeline-level variables require @Field annotation to avoid Jenkins CPS warnings
+// about implicit field creation. These variables persist across pipeline stages.
+// Reference: https://www.jenkins.io/doc/book/pipeline/shared-libraries/
+@groovy.transform.Field
+def PROPS = null
+@groovy.transform.Field
+def IMG_PARAMS = null
+@groovy.transform.Field
+def IMAGES_FAILED = false
 
 def parseProps(text) {
-    def x = {}
+    // Use [:] for empty Map. Using {} creates a Closure, not a Map.
+    // Reference: https://groovy-lang.org/groovy-dev-kit.html
+    def x = [:]
     for (line in text.split (/\n+/)) {
         if (line.matches (/\s*(?:#.*)?#/)) {
             continue
         }
-        parts = line.split ("=", 2)
-        key = parts[0]
-        value = parts[1]
+        // Use def keyword for loop variables to avoid CPS field creation warnings
+        def parts = line.split ("=", 2)
+        def key = parts[0]
+        def value = parts[1]
         x."${key}" = value
     }
     return x
 }
 
 def loadEnv() {
-    def data = {}
-    data.NEED_BUILD = false
-    data.SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS = params.SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS
+    // Use [:] for empty Map. Using {} creates a Closure, not a Map.
+    // Use bracket notation for Map property access to avoid false positive CPS warnings.
+    // Dot notation (data.KEY) triggers warnings because CPS cannot distinguish between
+    // dynamic Map property access and implicit field creation.
+    // Reference: https://www.jenkins.io/doc/book/pipeline/cps-method-mismatches/
+    def data = [:]
+    data["NEED_BUILD"] = false
+    data["SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS"] = params.SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS
     ws(params.BUILD_HOME) {
         if (fileExists ("NEED_BUILD")) {
-            data.NEED_BUILD = true
+            data["NEED_BUILD"] = true
         }
     }
     final String configText = sh (script: "${Constants.SCRIPTS_DIR}/print-config.sh", returnStdout: true)
     final props = parseProps (configText)
-    data.BUILD_OUTPUT_HOME_URL = props.BUILD_OUTPUT_HOME_URL
-    data.PUBLISH_URL = props.PUBLISH_URL
-    data.BUILD_REMOTE_CLI = props.BUILD_REMOTE_CLI == "true"
+    data["BUILD_OUTPUT_HOME_URL"] = props.BUILD_OUTPUT_HOME_URL
+    data["PUBLISH_URL"] = props.PUBLISH_URL
+    data["BUILD_REMOTE_CLI"] = props.BUILD_REMOTE_CLI == "true"
     PROPS = data
-    return data.NEED_BUILD
+    return data["NEED_BUILD"]
 }
 
 def partJobName (name) {
@@ -69,7 +83,7 @@ def runImagesPart (name, params = []) {
     // current build. Instead we note when an image-related
     // job has failed, and skip all subsequent image-related
     // jobs.
-    if (PROPS.SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS) {
+    if (PROPS["SUPPRESS_DOCKER_IMAGE_BUILD_ERRORS"]) {
         if (!IMAGES_FAILED) {
             final jobName = partJobName (name)
             final res = runPart (name, IMG_PARAMS + params, false).result
@@ -97,10 +111,10 @@ def printBuildFooter() {
         msg += "\n"
         msg += "========================================\n"
         msg += "\n"
-        if (PROPS.NEED_BUILD) {
-            msg += "Build output:   ${PROPS.BUILD_OUTPUT_HOME_URL}\n"
-            if (PROPS.PUBLISH_URL) {
-                msg += "Publish output: ${PROPS.PUBLISH_URL}\n"
+        if (PROPS["NEED_BUILD"]) {
+            msg += "Build output:   ${PROPS["BUILD_OUTPUT_HOME_URL"]}\n"
+            if (PROPS["PUBLISH_URL"]) {
+                msg += "Publish output: ${PROPS["PUBLISH_URL"]}\n"
             }
             if (IMAGES_FAILED) {
                 msg += "\n"
@@ -278,7 +292,7 @@ or with paths relative to repo root:
         }
         // This stage runs only if build is required
         stage('X0') {
-            when { expression { PROPS.NEED_BUILD } }
+            when { expression { PROPS["NEED_BUILD"] } }
             stages {
                 stage('PREPARE') {
                     steps {
@@ -373,7 +387,7 @@ or with paths relative to repo root:
                         } // stages
                     } // stage('IMAGES')
                     stage('remote-cli') {
-                        when { expression { PROPS.BUILD_REMOTE_CLI } }
+                        when { expression { PROPS["BUILD_REMOTE_CLI"] } }
                         steps {
                             runPart ("build-remote-cli")
                         }