Wave 2 prep: LedgerEvent.ref, demo bridge protocol, artifact stubs, sendText in ChatActionsContext

components/artifacts/demo-card.tsx

@@ -0,0 +1,10 @@
+import type { ArtifactPartProps } from "@/src/core/contracts";
+
+/**
+ * Demo artifact card (W6): sandboxed iframe rendering DemoResult.html with
+ * the auto-injected resize/error bridge (contracts.ts "Demo iframe bridge").
+ * While input-available: job activity card (poll /api/jobs).
+ */
+export function DemoCard(_props: ArtifactPartProps) {
+	return null;
+}

components/artifacts/index.ts

@@ -1,6 +1,9 @@
 import type { ComponentType } from "react";
 import type { ArtifactPartProps } from "@/src/core/contracts";
+import { DemoCard } from "@/components/artifacts/demo-card";
 import { JobCard } from "@/components/artifacts/job-card";
+import { PlanDivider } from "@/components/artifacts/plan-divider";
+import { VisualCard } from "@/components/artifacts/visual-card";
 
 /**
  * Artifact renderer registry — the extension point for tool-part UI.
@@ -16,5 +19,9 @@ import { JobCard } from "@/components/artifacts/job-card";
  */
 export const artifactRenderers: Record<string, ComponentType<ArtifactPartProps>> = {
 	research: JobCard,
-	// W6: "demo" → sandboxed iframe card, "visual" → svg card
+	// Phase divider where the plan lands (W5 fills in the component):
+	plan_init: PlanDivider,
+	// Artifacts (W6 fills in the components):
+	demo: DemoCard,
+	visual: VisualCard,
 };

components/artifacts/plan-divider.tsx

@@ -0,0 +1,9 @@
+import type { ArtifactPartProps } from "@/src/core/contracts";
+
+/**
+ * Phase divider rendered where plan_init lands in the transcript (W5).
+ * Probe → teach transition marker per vision §2 "Two phases".
+ */
+export function PlanDivider(_props: ArtifactPartProps) {
+	return null;
+}

components/artifacts/visual-card.tsx

@@ -0,0 +1,9 @@
+import type { ArtifactPartProps } from "@/src/core/contracts";
+
+/**
+ * Visual artifact card (W6): renders VisualResult.svg inline.
+ * While input-available: job activity card (poll /api/jobs).
+ */
+export function VisualCard(_props: ArtifactPartProps) {
+	return null;
+}