feat(pipeline-migration): relax legacy config migration and pin latest runner plugins

- Coerce/default/drop invalid or unknown legacy fields with warnings instead of blocking
- Never block on LocalAgent model; prune dangling KB/tool/MCP references
- Mark custom (non-builtin) 4.10 runners as unsupported_runner instead of failing
- Pin runner plugins to current marketplace versions (0.2.x); fall back to latest when a pin is withdrawn
- Raise plugin install/upgrade timeout to 600s for slow dependency installs
- Assistant configure_pipeline writes the 4.11 runner shape

Co-Authored-By: Claude Opus 5.5 <[email protected]>

web/src/app/home/pipelines/PipelineMigration.tsx

@@ -147,7 +147,15 @@ export default function PipelineMigration({
       ['migrated', 'already_current'].includes(item.state),
     );
   const rows = preview?.items ?? [];
+  // Custom 4.10 runners cannot be migrated automatically; they are listed
+  // for attention but never submitted.
   const count = rows.filter(
+    (item) =>
+      !['already_current', 'not_legacy', 'unsupported_runner'].includes(
+        item.state,
+      ),
+  ).length;
+  const attention = rows.filter(
     (item) => !['already_current', 'not_legacy'].includes(item.state),
   ).length;
 
@@ -189,7 +197,10 @@ export default function PipelineMigration({
     )
       return;
     let items = rows.filter(
-      (item) => !['already_current', 'not_legacy'].includes(item.state),
+      (item) =>
+        !['already_current', 'not_legacy', 'unsupported_runner'].includes(
+          item.state,
+        ),
     );
     setInstallations([]);
     setDataOnly(!installPlugins);
@@ -340,12 +351,12 @@ export default function PipelineMigration({
 
   return (
     <>
-      {(count > 0 || results.length > 0) && (
+      {(attention > 0 || results.length > 0) && (
         <Alert className="mb-4 shrink-0 border-amber-200 bg-amber-50 text-amber-900 dark:border-amber-900/50 dark:bg-amber-950/30 dark:text-amber-200">
           <AlertTriangle aria-hidden="true" />
           <AlertTitle>{t('pipelineMigration.title')}</AlertTitle>
           <AlertDescription className="flex items-center justify-between gap-3 text-amber-800 dark:text-amber-200">
-            <span>{t('pipelineMigration.detected', { count })}</span>
+            <span>{t('pipelineMigration.detected', { count: attention })}</span>
             <Button
               variant="outline"
               size="sm"
@@ -404,7 +415,7 @@ export default function PipelineMigration({
               </div>
             ) : (
               <p className="text-sm text-muted-foreground">
-                {t('pipelineMigration.detected', { count })}
+                {t('pipelineMigration.detected', { count: attention })}
               </p>
             )}
             <MigrationInstallProgress installations={installations} />
@@ -417,7 +428,7 @@ export default function PipelineMigration({
                 })}
               </p>
             )}
-            {(count > 0 || results.length > 0) && (
+            {(attention > 0 || results.length > 0) && (
               <Collapsible>
                 <CollapsibleTrigger asChild>
                   <Button
@@ -470,6 +481,11 @@ export default function PipelineMigration({
                                   {item.target_plugin.name}
                                 </p>
                               )}
+                              {item.state === 'unsupported_runner' && (
+                                <p className="text-xs text-destructive break-words">
+                                  {t('pipelineMigration.notices.customRunner')}
+                                </p>
+                              )}
                               {item.warnings.some(
                                 (issue) =>
                                   issue.code === 'local.box_state_reset',

web/src/app/home/pipelines/pipeline-migration-issues.ts

@@ -31,6 +31,21 @@ const issueKeys: Record<string, string> = {
   runner_schema_incompatible: 'schemaChanged',
   plugin_version_incompatible: 'pluginVersion',
   'runtime.pending_interaction': 'pendingInteraction',
+  'legacy.custom_runner_unsupported': 'customRunner',
+  'migration.unknown_field_dropped': 'fieldDropped',
+  'migration.unknown_section_archived': 'fieldDropped',
+  'migration.value_coerced': 'valueRepaired',
+  'migration.invalid_value_defaulted': 'valueRepaired',
+  'migration.missing_default_filled': 'valueRepaired',
+  'migration.alias_conflict_resolved': 'aliasRepaired',
+  'local.prompt_normalized': 'valueRepaired',
+  'local.reasoning_dropped': 'valueRepaired',
+  'local.box_template_defaulted': 'valueRepaired',
+  'langflow.tweaks_invalid_defaulted': 'valueRepaired',
+  'migration.mixed_runner_selection': 'mixedRunner',
+  'migration.runner_config_replaced': 'runnerConfigReplaced',
+  'extensions.runner_added': 'runnerAdded',
+  invalid_extension_preferences: 'extensionPrefs',
 };
 
 /** Only locally reviewed codes may select localized copy. */

web/src/app/infra/entities/api/pipeline-migration.ts

@@ -4,6 +4,7 @@ export type PipelineMigrationState =
   | 'blocked'
   | 'already_current'
   | 'not_legacy'
+  | 'unsupported_runner'
   | 'activation_pending';
 
 export interface PipelineMigrationIssue {