Add experiments folder. Add usage.md and SKILL.md. Fix Sheet interactions and add dynamic sheet mode.

apps/demo/src/components/CompatibilityAsyncProbe.vue

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+<script setup lang="ts">
+import { inject } from "vue";
+import { useRoute } from "vue-router";
+import {
+  compatibilityLabContextKey,
+  demoAppValueKey,
+  recordCompatibilityEvent,
+} from "../compatibility-lab";
+
+const props = defineProps<{ requestId: number }>();
+const route = useRoute();
+const appValue = inject(demoAppValueKey, "missing app injection");
+const labContext = inject(compatibilityLabContextKey);
+
+recordCompatibilityEvent(
+  "Suspense",
+  "async setup started",
+  `request ${props.requestId}`,
+);
+await new Promise((resolve) => window.setTimeout(resolve, 750));
+recordCompatibilityEvent(
+  "Suspense",
+  "async setup resolved",
+  `request ${props.requestId}`,
+);
+</script>
+
+<template>
+  <article
+    class="compat-probe compat-probe--resolved"
+    data-testid="compat-suspense-ready"
+  >
+    <span class="compat-probe__badge">Suspense resolved</span>
+    <strong>Async request {{ requestId }} complete</strong>
+    <p>{{ appValue }}</p>
+    <p>{{ labContext?.routeLabel.value }}</p>
+    <p>{{ route.fullPath }}</p>
+  </article>
+</template>

apps/demo/src/components/CompatibilityCompositionProbe.vue

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+<script setup lang="ts">
+import {
+  onBeforeMount,
+  onBeforeUnmount,
+  onBeforeUpdate,
+  onMounted,
+  onUnmounted,
+  onUpdated,
+  ref,
+} from "vue";
+import { useRoute } from "vue-router";
+import { recordCompatibilityEvent } from "../compatibility-lab";
+
+const props = defineProps<{
+  instanceName: string;
+  revision: number;
+}>();
+const route = useRoute();
+const localCount = ref(0);
+const record = (hook: string) =>
+  recordCompatibilityEvent(props.instanceName, hook, route.fullPath);
+
+onBeforeMount(() => record("onBeforeMount"));
+onMounted(() => record("onMounted"));
+onBeforeUpdate(() => record("onBeforeUpdate"));
+onUpdated(() => record("onUpdated"));
+onBeforeUnmount(() => record("onBeforeUnmount"));
+onUnmounted(() => record("onUnmounted"));
+</script>
+
+<template>
+  <article class="compat-probe" data-testid="composition-lifecycle-probe">
+    <span class="compat-probe__badge">Composition API</span>
+    <strong>{{ instanceName }}</strong>
+    <p><code>useRoute()</code>: {{ route.fullPath }}</p>
+    <p>Revision {{ revision }} · local count {{ localCount }}</p>
+    <button type="button" @click="localCount += 1">
+      Increment local state
+    </button>
+  </article>
+</template>

apps/demo/src/components/CompatibilityInjectProbe.vue

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+<script setup lang="ts">
+import { computed, inject } from "vue";
+import { useRoute } from "vue-router";
+import {
+  compatibilityLabContextKey,
+  demoAppValueKey,
+} from "../compatibility-lab";
+
+defineProps<{ location: "route tree" | "teleport" }>();
+
+const route = useRoute();
+const appValue = inject(demoAppValueKey, "missing app injection");
+const labContext = inject(compatibilityLabContextKey);
+const labValue = computed(
+  () => labContext?.routeLabel.value ?? "missing page injection",
+);
+</script>
+
+<template>
+  <article
+    class="compat-probe"
+    :data-testid="`inject-probe-${location.replace(' ', '-')}`"
+  >
+    <span class="compat-probe__badge">provide / inject · {{ location }}</span>
+    <strong>{{ appValue }}</strong>
+    <p>Page injection: {{ labValue }}</p>
+    <p>Scoped route: {{ route.fullPath }}</p>
+  </article>
+</template>

apps/demo/src/components/CompatibilityKeepAliveProbe.vue

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+<script setup lang="ts">
+import {
+  onActivated,
+  onBeforeMount,
+  onBeforeUnmount,
+  onDeactivated,
+  onMounted,
+  onUnmounted,
+  ref,
+} from "vue";
+import { recordCompatibilityEvent } from "../compatibility-lab";
+
+const props = defineProps<{ name: string }>();
+const count = ref(0);
+const record = (hook: string) =>
+  recordCompatibilityEvent(`KeepAlive ${props.name}`, hook);
+
+onBeforeMount(() => record("onBeforeMount"));
+onMounted(() => record("onMounted"));
+onActivated(() => record("onActivated"));
+onDeactivated(() => record("onDeactivated"));
+onBeforeUnmount(() => record("onBeforeUnmount"));
+onUnmounted(() => record("onUnmounted"));
+</script>
+
+<template>
+  <article
+    class="compat-probe compat-probe--keepalive"
+    :data-testid="`keep-alive-${name}`"
+  >
+    <span class="compat-probe__badge">Kept instance {{ name }}</span>
+    <strong>Counter: {{ count }}</strong>
+    <p>Increment, switch instances, then return to verify preserved state.</p>
+    <button type="button" @click="count += 1">Increment {{ name }}</button>
+  </article>
+</template>

apps/demo/src/components/CompatibilityOptionsProbe.vue

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+<script lang="ts">
+import { defineComponent } from "vue";
+import type { RouteLocationNormalizedLoaded } from "vue-router";
+import { recordCompatibilityEvent } from "../compatibility-lab";
+
+export default defineComponent({
+  name: "CompatibilityOptionsProbe",
+  props: {
+    instanceName: { type: String, required: true },
+    revision: { type: Number, required: true },
+  },
+  data: () => ({ localCount: 0 }),
+  beforeCreate() {
+    recordCompatibilityEvent(this.instanceName, "beforeCreate");
+  },
+  created() {
+    recordCompatibilityEvent(this.instanceName, "created", this.routePath());
+  },
+  beforeMount() {
+    recordCompatibilityEvent(this.instanceName, "beforeMount");
+  },
+  mounted() {
+    recordCompatibilityEvent(this.instanceName, "mounted");
+  },
+  beforeUpdate() {
+    recordCompatibilityEvent(this.instanceName, "beforeUpdate");
+  },
+  updated() {
+    recordCompatibilityEvent(this.instanceName, "updated");
+  },
+  beforeUnmount() {
+    recordCompatibilityEvent(this.instanceName, "beforeUnmount");
+  },
+  unmounted() {
+    recordCompatibilityEvent(this.instanceName, "unmounted");
+  },
+  methods: {
+    routePath() {
+      return (this as unknown as { $route: RouteLocationNormalizedLoaded })
+        .$route.fullPath;
+    },
+  },
+});
+</script>
+
+<template>
+  <article class="compat-probe" data-testid="options-lifecycle-probe">
+    <span class="compat-probe__badge">Options API</span>
+    <strong>{{ instanceName }}</strong>
+    <p><code>$route</code>: {{ routePath() }}</p>
+    <p>Revision {{ revision }} · local count {{ localCount }}</p>
+    <button type="button" @click="localCount += 1">
+      Increment local state
+    </button>
+  </article>
+</template>