diff --git a/website/test-stack.html b/website/test-stack.html
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+++ b/website/test-stack.html
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+<!doctype html>
+<html lang="en" data-theme="dark">
+<head>
+	<meta charset="UTF-8" />
+	<title>Stack View + Wiring Test</title>
+	<style>
+		* { margin: 0; padding: 0; box-sizing: border-box; }
+		html, body { width: 100%; height: 100%; background: #0f172a; color: #e2e8f0; font-family: system-ui, sans-serif; }
+		body { padding: 24px; display: flex; flex-direction: column; gap: 16px; }
+		h1 { font-size: 1.2rem; opacity: 0.7; }
+		#log { font-size: 0.75rem; font-family: monospace; background: #1e293b; border-radius: 8px; padding: 12px; max-height: 200px; overflow-y: auto; white-space: pre-wrap; }
+		.actions { display: flex; gap: 8px; flex-wrap: wrap; }
+		.actions button { padding: 6px 14px; border: 1px solid rgba(255,255,255,0.15); border-radius: 6px; background: rgba(255,255,255,0.05); color: #e2e8f0; font-size: 0.75rem; cursor: pointer; }
+		.actions button:hover { background: rgba(34,211,238,0.15); border-color: #22d3ee; }
+	</style>
+</head>
+<body>
+	<h1>rStack Tab Bar — Stack View + Wiring Test</h1>
+	<div class="actions">
+		<button onclick="addFlow()">Add flow (drag dialog)</button>
+		<button onclick="clearFlows()">Clear all flows</button>
+		<button onclick="addThirdLayer()">Add 3rd layer (rCal)</button>
+	</div>
+	<rstack-tab-bar space="test" active="layer-rspace" view-mode="stack"></rstack-tab-bar>
+	<div id="log">Event log:\n</div>
+
+	<script type="module">
+		import { RStackTabBar } from "../shared/components/rstack-tab-bar.ts";
+		RStackTabBar.define();
+
+		const tb = document.querySelector("rstack-tab-bar");
+		const log = document.getElementById("log");
+		function emit(msg) { log.textContent += msg + "\n"; log.scrollTop = log.scrollHeight; }
+
+		// Modules with feeds + acceptsFeeds
+		const modules = [
+			{
+				id: "rspace", name: "rSpace Canvas", icon: "\u{1F3A8}",
+				description: "Collaborative infinite canvas",
+				feeds: [
+					{ id: "shapes", name: "Canvas Shapes", kind: "data", description: "All shapes on canvas" },
+					{ id: "tokens", name: "Token Mints", kind: "economic", description: "Token creation events" },
+				],
+				acceptsFeeds: ["data", "trust", "attention"],
+			},
+			{
+				id: "rnotes", name: "Notes", icon: "\u{1F4DD}",
+				description: "Collaborative notes",
+				feeds: [
+					{ id: "notes-feed", name: "Note Updates", kind: "data", description: "Note change events" },
+					{ id: "endorsements", name: "Endorsements", kind: "trust", description: "Note endorsements" },
+				],
+				acceptsFeeds: ["data", "economic", "trust"],
+			},
+			{
+				id: "rcal", name: "Calendar", icon: "\u{1F4C5}",
+				description: "Shared calendar",
+				feeds: [
+					{ id: "events-feed", name: "Events", kind: "attention", description: "Calendar events" },
+				],
+				acceptsFeeds: ["data", "attention"],
+			},
+		];
+		tb.setModules(modules);
+
+		// Start with 2 layers
+		let layers = [
+			{ id: "layer-rspace", moduleId: "rspace", label: "Canvas", order: 0, color: "", visible: true, createdAt: Date.now() },
+			{ id: "layer-rnotes", moduleId: "rnotes", label: "Notes", order: 1, color: "", visible: true, createdAt: Date.now() },
+		];
+		tb.setLayers(layers);
+
+		// Start with 1 flow to see tubes
+		let flows = [
+			{ id: "flow-seed", kind: "data", sourceLayerId: "layer-rspace", targetLayerId: "layer-rnotes", label: "Canvas \u2192 Notes", strength: 0.7, active: true },
+		];
+		tb.setFlows(flows);
+		emit("Loaded 2 layers + 1 seed flow. Stack view active.");
+		emit("Try: click an output port chip to enter wiring mode.");
+
+		// Event listeners
+		tb.addEventListener("flow-create", (e) => {
+			const f = e.detail.flow;
+			flows.push(f);
+			tb.setFlows(flows);
+			emit(`\u2705 flow-create: ${f.kind} ${f.sourceLayerId} \u2192 ${f.targetLayerId}` + (f.meta?.sourceFeedId ? ` (feed: ${f.meta.sourceFeedId})` : ""));
+		});
+
+		tb.addEventListener("flow-select", (e) => {
+			emit(`\u{1F449} flow-select: ${e.detail.flowId}`);
+		});
+
+		tb.addEventListener("flow-remove", (e) => {
+			flows = flows.filter(f => f.id !== e.detail.flowId);
+			tb.setFlows(flows);
+			emit(`\u274C flow-remove: ${e.detail.flowId}`);
+		});
+
+		tb.addEventListener("layer-switch", (e) => {
+			emit(`\u{1F4CD} layer-switch: ${e.detail.layerId}`);
+		});
+
+		tb.addEventListener("layer-add", (e) => {
+			emit(`\u2795 layer-add: ${e.detail.moduleId}`);
+		});
+
+		tb.addEventListener("view-toggle", (e) => {
+			emit(`\u{1F504} view-toggle: ${e.detail.mode}`);
+		});
+
+		// Expose helpers to window for button clicks
+		window.addFlow = () => {
+			emit("Drag between two layer planes to open the flow dialog.");
+		};
+		window.clearFlows = () => {
+			flows = [];
+			tb.setFlows(flows);
+			emit("Cleared all flows.");
+		};
+		window.addThirdLayer = () => {
+			if (layers.find(l => l.moduleId === "rcal")) { emit("rCal layer already exists."); return; }
+			layers.push({ id: "layer-rcal", moduleId: "rcal", label: "Calendar", order: 2, color: "", visible: true, createdAt: Date.now() });
+			tb.setLayers(layers);
+			tb.setFlows(flows);
+			emit("Added Calendar layer. Now try wiring between 3 layers.");
+		};
+	</script>
+</body>
+</html>
