feat(45-01): add ConditionalSwitch type definitions, default data, executor, and validation

- Add MatchMode type (exact, contains, starts-with, ends-with)
- Add ConditionalSwitchRule interface with id, value, mode, label, isMatched
- Add ConditionalSwitchNodeData interface with incomingText and rules array
- Add conditionalSwitch to NodeType union (after switch)
- Add ConditionalSwitchNodeData to WorkflowNodeData union
- Add default data with single rule (mode: contains, empty value)
- Add default dimensions (260x180, wider than Switch for mode dropdown)
- Add executeConditionalSwitch passthrough executor
- Add conditionalSwitch to VALID_NODE_TYPES in validation
- Export ConditionalSwitchNode from components index (component created in next task)

src/components/nodes/index.ts

@@ -19,4 +19,5 @@ export { VideoTrimNode } from "./VideoTrimNode";
 export { VideoFrameGrabNode } from "./VideoFrameGrabNode";
 export { RouterNode } from "./RouterNode";
 export { SwitchNode } from "./SwitchNode";
+export { ConditionalSwitchNode } from "./ConditionalSwitchNode";
 export { GroupNode } from "./GroupNode";

src/lib/quickstart/validation.ts

@@ -33,6 +33,7 @@ const VALID_NODE_TYPES: NodeType[] = [
   "videoFrameGrab",
   "router",
   "switch",
+  "conditionalSwitch",
   "glbViewer",
 ];
 
@@ -61,6 +62,7 @@ const DEFAULT_DIMENSIONS: Record<NodeType, { width: number; height: number }> =
   videoFrameGrab: { width: 320, height: 320 },
   router: { width: 200, height: 80 },
   switch: { width: 220, height: 120 },
+  conditionalSwitch: { width: 260, height: 180 },
   glbViewer: { width: 360, height: 380 },
 };
 

src/store/execution/index.ts

@@ -19,6 +19,7 @@ export {
   executeGlbViewer,
   executeRouter,
   executeSwitch,
+  executeConditionalSwitch,
 } from "./simpleNodeExecutors";
 
 export { executeNanoBanana } from "./nanoBananaExecutor";

src/store/execution/simpleNodeExecutors.ts

@@ -337,6 +337,17 @@ export async function executeSwitch(ctx: NodeExecutionContext): Promise<void> {
   ctx.updateNodeData(ctx.node.id, { status: "complete" });
 }
 
+/**
+ * ConditionalSwitch node: pure passthrough with text-based rule matching.
+ */
+export async function executeConditionalSwitch(ctx: NodeExecutionContext): Promise<void> {
+  // ConditionalSwitch is pure passthrough — actual text matching happens during connectedInputs traversal.
+  // Brief status flash to show execution occurred.
+  ctx.updateNodeData(ctx.node.id, { status: "loading" });
+  await new Promise(resolve => setTimeout(resolve, 50));
+  ctx.updateNodeData(ctx.node.id, { status: "complete" });
+}
+
 /**
  * GLB Viewer node: receives 3D model URL from upstream, fetches and loads it.
  */

src/store/utils/nodeDefaults.ts

@@ -20,6 +20,7 @@ import {
   VideoFrameGrabNodeData,
   RouterNodeData,
   SwitchNodeData,
+  ConditionalSwitchNodeData,
   GLBViewerNodeData,
   WorkflowNodeData,
   GroupColor,
@@ -53,6 +54,7 @@ export const defaultNodeDimensions: Record<NodeType, { width: number; height: nu
   videoFrameGrab: { width: 320, height: 320 },
   router: { width: 200, height: 80 },
   switch: { width: 220, height: 120 },
+  conditionalSwitch: { width: 260, height: 180 },
   glbViewer: { width: 360, height: 380 },
 };
 
@@ -296,6 +298,21 @@ export const createDefaultNodeData = (type: NodeType): WorkflowNodeData => {
           { id: Math.random().toString(36).slice(2, 9), name: "Output 1", enabled: true }
         ]
       } as SwitchNodeData;
+    case "conditionalSwitch":
+      return {
+        customTitle: null,
+        comment: null,
+        incomingText: null,
+        rules: [
+          {
+            id: "rule-" + Math.random().toString(36).slice(2, 9),
+            value: "",
+            mode: "contains",
+            label: "Rule 1",
+            isMatched: false,
+          }
+        ]
+      } as ConditionalSwitchNodeData;
     case "glbViewer":
       return {
         glbUrl: null,

src/types/nodes.ts

@@ -43,6 +43,7 @@ export type NodeType =
   | "videoFrameGrab"
   | "router"
   | "switch"
+  | "conditionalSwitch"
   | "generate3d"
   | "glbViewer";
 
@@ -370,6 +371,30 @@ export interface SwitchNodeData extends BaseNodeData {
   }>;
 }
 
+/**
+ * Match mode for conditional switch rules
+ */
+export type MatchMode = "exact" | "contains" | "starts-with" | "ends-with";
+
+/**
+ * Conditional switch rule for text-based routing
+ */
+export interface ConditionalSwitchRule {
+  id: string;           // Unique handle ID, prefixed with "rule-" to avoid collision with reserved "default" keyword
+  value: string;        // Comma-separated match values
+  mode: MatchMode;      // Match strategy
+  label: string;        // User-editable display name
+  isMatched: boolean;   // Computed match state
+}
+
+/**
+ * Conditional Switch node - text-based routing with multi-mode matching
+ */
+export interface ConditionalSwitchNodeData extends BaseNodeData {
+  incomingText: string | null;  // Upstream text for evaluation and display
+  rules: ConditionalSwitchRule[]; // User-defined rules
+}
+
 /**
  * Split Grid node - splits image into grid cells for parallel processing
  */
@@ -430,6 +455,7 @@ export type WorkflowNodeData =
   | VideoFrameGrabNodeData
   | RouterNodeData
   | SwitchNodeData
+  | ConditionalSwitchNodeData
   | GLBViewerNodeData;
 
 /**