diff --git a/.zdp/plugin.json b/.zdp/plugin.json
index fe3cf95..8ed7f37 100644
--- a/.zdp/plugin.json
+++ b/.zdp/plugin.json
@@ -2,16 +2,22 @@
   "apiVersion": 1,
   "id": "scheduler",
   "name": "Scheduler",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "description": "Create normal ZCode tasks from timezone-aware cron schedules while ZCode is open.",
   "entrypoints": {
     "main": "dist/main.cjs",
     "renderer": "dist/renderer.js"
   },
   "engines": {
-    "host": ">=0.2.0 <1",
+    "host": ">=0.3.4 <1",
     "zcode": ">=3.3.6"
   },
+  "capabilities": [
+    "zcode.workspaces.read",
+    "zcode.tasks.run",
+    "ui.pages",
+    "ui.overlays"
+  ],
   "pages": [
     {"id": "jobs", "title": "Scheduler"}
   ]
diff --git a/README.md b/README.md
index d8ca3a5..c14451b 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Scheduled runs are ordinary persistent ZCode tasks. They appear immediately in t
 
 Open **Extensions → Available** in ZCode and install Scheduler. The host verifies the release archive checksum before staging it. New installs and updates take effect on the next ZCode launch.
 
-Manual installation is also supported: download `zcode-scheduler-v0.1.4.zip` from the [latest release](https://github.com/notmike101/zcode-scheduler/releases/latest), extract the `scheduler` folder, and select it from **Extensions → Installed → Install folder**.
+Manual installation is also supported: download `zcode-scheduler-v0.1.5.zip` from the [latest release](https://github.com/notmike101/zcode-scheduler/releases/latest), extract the `scheduler` folder, and select it from **Extensions → Installed → Install folder**.
 
 ## Scheduling behavior
 
@@ -30,7 +30,7 @@ Manual installation is also supported: download `zcode-scheduler-v0.1.4.zip` fro
 ```powershell
 bun install
 bun run check
-bun run release:package -- --tag v0.1.4
+bun run release:package -- --tag v0.1.5
 ```
 
 The release command writes a ZIP, its SHA-256 checksum, and `extension-update.json` to `dist/release`.
diff --git a/bun.lock b/bun.lock
index ea41574..36a50f8 100644
--- a/bun.lock
+++ b/bun.lock
@@ -10,7 +10,7 @@
         "zod": "^4.1.12",
       },
       "devDependencies": {
-        "@notmike101/zcode-extension-sdk": "0.3.0",
+        "@notmike101/zcode-extension-sdk": "0.3.4",
         "@types/bun": "^1.3.4",
         "@types/node": "^24.10.1",
         "typescript": "^5.9.3",
@@ -18,7 +18,7 @@
     },
   },
   "packages": {
-    "@notmike101/zcode-extension-sdk": ["@notmike101/zcode-extension-sdk@0.3.0", "", {}, "sha512-MBZGF3+UPUQqHmaW8hUmqncG64oujaOawB5gMM0Vwl/4+rPr8pcoCs+fbzYhRXIKWIXZjsUnyE8ZmA6fkyINhQ=="],
+    "@notmike101/zcode-extension-sdk": ["@notmike101/zcode-extension-sdk@0.3.4", "", {}, "sha512-Kl/ldrGuAxg/O0SIZ8REG23qZhwJWxB6Be6QwG605mFDTCgloAQ2dMnpe7U+xlfGyhLhoYdTt6l2ab6p2WStIw=="],
 
     "@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
 
diff --git a/package.json b/package.json
index edaffa9..2b3ac6b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zcode-scheduler",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "description": "Schedule normal, visible ZCode tasks with timezone-aware cron expressions.",
   "private": true,
   "license": "MIT",
@@ -24,7 +24,7 @@
     "zod": "^4.1.12"
   },
   "devDependencies": {
-    "@notmike101/zcode-extension-sdk": "0.3.0",
+    "@notmike101/zcode-extension-sdk": "0.3.4",
     "@types/bun": "^1.3.4",
     "@types/node": "^24.10.1",
     "typescript": "^5.9.3"
diff --git a/src/renderer.tsx b/src/renderer.tsx
index 1b2d72b..30f3d73 100644
--- a/src/renderer.tsx
+++ b/src/renderer.tsx
@@ -1,6 +1,6 @@
 import {render} from "preact";
 import {useEffect, useMemo, useState} from "preact/hooks";
-import type {ExtensionBridge as ZdpBridge} from "@notmike101/zcode-extension-sdk/renderer";
+import {defineRendererExtension, type RendererExtensionContext} from "@notmike101/zcode-extension-sdk/renderer";
 import type {RunRecord, SchedulerJob} from "./schemas.ts";
 import styles from "./scheduler.css";
 
@@ -46,21 +46,27 @@ const emptyDraft = (timezone = Intl.DateTimeFormat().resolvedOptions().timeZone
   maxParallel: 4,
 });
 
-window.ZDP_REGISTER_PLUGIN_RENDERER?.({
+export const schedulerRenderer = defineRendererExtension({
   id: "scheduler",
-  mount(container, bridge) {
+  mountPage(pageId, container, context) {
+    if (pageId !== "jobs") return;
     const style = document.createElement("style");
     style.textContent = styles;
     container.replaceChildren(style);
     const mount = document.createElement("div");
     mount.className = "scheduler-root";
     container.append(mount);
-    render(<SchedulerPage bridge={bridge}/>, mount);
-    return () => render(null, mount);
+    render(<SchedulerPage context={context}/>, mount);
+    return () => {
+      render(null, mount);
+      container.replaceChildren();
+    };
   },
 });
 
-function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
+if (typeof window !== "undefined") window.ZDP_REGISTER_PLUGIN_RENDERER?.(schedulerRenderer);
+
+function SchedulerPage({context}: {context: RendererExtensionContext}) {
   const [state, setState] = useState<SchedulerState>();
   const [draft, setDraft] = useState<JobDraft>(emptyDraft());
   const [editing, setEditing] = useState(false);
@@ -69,14 +75,13 @@ function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
   const [error, setError] = useState<string>();
   const [busy, setBusy] = useState(false);
 
-  const invoke = <T,>(method: string, payload?: unknown) => bridge.invoke<T>("plugin:invoke", {pluginId: "scheduler", method, payload});
+  const invoke = <T,>(method: string, payload?: unknown) => context.ipc.invoke<T>(method, payload);
   const refresh = () => invoke<SchedulerState>("get-state").then(setState).catch((cause) => setError(errorText(cause)));
 
   useEffect(() => {
     void refresh();
-    const listener = () => void refresh();
-    window.addEventListener("plugin:scheduler:state-changed", listener);
-    return () => window.removeEventListener("plugin:scheduler:state-changed", listener);
+    const subscription = context.ipc.on("state-changed", () => void refresh());
+    return () => subscription.dispose();
   }, []);
 
   useEffect(() => {
@@ -95,7 +100,12 @@ function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
   };
 
   const save = async () => {
-    if (draft.mode === "yolo" && !window.confirm("Yolo mode permits unattended workspace changes. Save this job with Yolo permissions?")) return;
+    if (draft.mode === "yolo" && !await context.ui.showDialog({
+      title: "Confirm Yolo permissions",
+      message: "Yolo mode permits unattended workspace changes. Save this job with Yolo permissions?",
+      confirmLabel: "Save job",
+      cancelLabel: "Cancel",
+    })) return;
     const model = draft.providerId.trim() && draft.modelId.trim()
       ? {providerId: draft.providerId.trim(), modelId: draft.modelId.trim(), ...(draft.variant.trim() ? {variant: draft.variant.trim()} : {})}
       : undefined;
@@ -145,7 +155,7 @@ function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
       <div class="scheduler-heading-actions"><button class={tab === "jobs" ? "active" : ""} onClick={() => setTab("jobs")}>Jobs</button><button class={tab === "history" ? "active" : ""} onClick={() => setTab("history")}>History</button>
       {tab === "jobs" && <button class="primary" onClick={() => {setDraft(emptyDraft(state?.timezone)); setEditing(true);}}>New job</button>}</div></div>
     {error && <div class="scheduler-error">{error}</div>}
-    {editing && tab === "jobs" && <JobEditor draft={draft} setDraft={setDraft} preview={preview} busy={busy} bridge={bridge} save={save} cancel={() => {setEditing(false); setDraft(emptyDraft(state?.timezone));}}/>}
+    {editing && tab === "jobs" && <JobEditor draft={draft} setDraft={setDraft} preview={preview} busy={busy} context={context} save={save} cancel={() => {setEditing(false); setDraft(emptyDraft(state?.timezone));}}/>}
     {!editing && tab === "jobs" && <div class="scheduler-jobs">
       {state?.jobs.map((job) => <article class="scheduler-job">
         <div class="scheduler-job-top"><div><h3>{job.name}</h3><p><code>{job.cron}</code> · {job.timezone}</p></div><span class={job.enabled ? "enabled" : "disabled"}>{job.enabled ? "Enabled" : "Paused"}</span></div>
@@ -156,9 +166,15 @@ function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
           <button disabled={busy} onClick={() => edit(job)}>Edit</button><button disabled={busy} onClick={() => edit(job, true)}>Duplicate</button>
           <button disabled={busy} onClick={() => void run(() => invoke("set-enabled", {id: job.id, enabled: !job.enabled}))}>{job.enabled ? "Pause" : "Enable"}</button>
           {activeByJob.get(job.id) && <button class="warn" disabled={busy} onClick={() => void run(() => invoke("cancel-run", {id: activeByJob.get(job.id)!.id}))}>Cancel active</button>}
-          <button class="danger" disabled={busy || Boolean(activeByJob.get(job.id))} onClick={() => {
-            if (window.confirm(`Delete scheduled job “${job.name}”?`)) void run(() => invoke("delete-job", {id: job.id}));
-          }}>Delete</button>
+          <button class="danger" disabled={busy || Boolean(activeByJob.get(job.id))} onClick={() => void (async () => {
+            const confirmed = await context.ui.showDialog({
+              title: "Delete scheduled job",
+              message: `Delete scheduled job “${job.name}”?`,
+              confirmLabel: "Delete",
+              cancelLabel: "Cancel",
+            });
+            if (confirmed) await run(() => invoke("delete-job", {id: job.id}));
+          })()}>Delete</button>
         </div>
       </article>)}
       {state && state.jobs.length === 0 && <div class="scheduler-empty">No scheduled jobs yet.</div>}
@@ -167,9 +183,9 @@ function SchedulerPage({bridge}: {bridge: ZdpBridge}) {
   </div>;
 }
 
-function JobEditor({draft, setDraft, preview, busy, bridge, save, cancel}: {
+function JobEditor({draft, setDraft, preview, busy, context, save, cancel}: {
   draft: JobDraft; setDraft: (value: JobDraft) => void; preview?: {nextRuns: string[]; description: string}; busy: boolean;
-  bridge: ZdpBridge; save: () => Promise<void>; cancel: () => void;
+  context: RendererExtensionContext; save: () => Promise<void>; cancel: () => void;
 }) {
   const set = <K extends keyof JobDraft>(key: K, value: JobDraft[K]) => setDraft({...draft, [key]: value});
   return <section class="scheduler-editor"><div class="scheduler-grid">
@@ -177,7 +193,7 @@ function JobEditor({draft, setDraft, preview, busy, bridge, save, cancel}: {
     <label>Cron expression<input value={draft.cron} onInput={(e) => set("cron", e.currentTarget.value)} placeholder="0 9 * * 1-5"/></label>
     <label>Timezone<input value={draft.timezone} onInput={(e) => set("timezone", e.currentTarget.value)} placeholder="America/Chicago"/></label>
     <label>Permission mode<select value={draft.mode} onChange={(e) => set("mode", e.currentTarget.value as JobDraft["mode"])}><option value="plan">Plan</option><option value="build">Build</option><option value="edit">Edit</option><option value="yolo">Yolo</option></select></label>
-    <label class="wide">Workspace<div class="scheduler-input-button"><input value={draft.workspacePath} onInput={(e) => set("workspacePath", e.currentTarget.value)} placeholder="D:\\project"/><button type="button" onClick={async () => {const folder = await bridge.invoke<string | null>("host:chooseDirectory"); if (folder) set("workspacePath", folder);}}>Browse</button></div></label>
+    <label class="wide">Workspace<div class="scheduler-input-button"><input value={draft.workspacePath} onInput={(e) => set("workspacePath", e.currentTarget.value)} placeholder="D:\\project"/><button type="button" onClick={async () => {const folder = await context.ui.chooseDirectory(); if (folder) set("workspacePath", folder);}}>Browse</button></div></label>
     <label class="wide">Prompt<textarea value={draft.prompt} onInput={(e) => set("prompt", e.currentTarget.value)} rows={6} placeholder="Describe the task ZCode should perform…"/></label>
     <label>Overlap<select value={draft.overlapPolicy} onChange={(e) => set("overlapPolicy", e.currentTarget.value as JobDraft["overlapPolicy"])}><option value="skip">Skip</option><option value="queue-one">Queue one</option><option value="parallel">Parallel</option></select></label>
     {draft.overlapPolicy === "parallel" && <label>Max parallel<input type="number" min="1" max="4" value={draft.maxParallel} onInput={(e) => set("maxParallel", Number(e.currentTarget.value))}/></label>}
diff --git a/tests/release.test.ts b/tests/release.test.ts
index 491edaf..ee5b0a0 100644
--- a/tests/release.test.ts
+++ b/tests/release.test.ts
@@ -1,22 +1,38 @@
 import {describe, expect, test} from "bun:test";
+import {readFileSync} from "node:fs";
+import path from "node:path";
 import {assertReleaseVersion, releaseBaseName, resolveReleaseTag} from "../scripts/release-helpers.ts";
+import {schedulerRenderer} from "../src/renderer.tsx";
 
 describe("release metadata", () => {
   test("accepts a matching semantic version tag", () => {
-    expect(assertReleaseVersion("v0.1.4", "0.1.4", "0.1.4")).toBe("0.1.4");
-    expect(releaseBaseName("0.1.4")).toBe("zcode-scheduler-v0.1.4");
+    expect(assertReleaseVersion("v0.1.5", "0.1.5", "0.1.5")).toBe("0.1.5");
+    expect(releaseBaseName("0.1.5")).toBe("zcode-scheduler-v0.1.5");
   });
 
   test("ignores pull-request merge refs when inferring a release tag", () => {
-    expect(resolveReleaseTag(undefined, undefined, "1/merge", "0.1.4")).toBe("v0.1.4");
-    expect(resolveReleaseTag(undefined, "branch", "main", "0.1.4")).toBe("v0.1.4");
-    expect(resolveReleaseTag(undefined, "tag", "v0.1.4", "0.1.4")).toBe("v0.1.4");
-    expect(resolveReleaseTag("v0.1.5", "tag", "v0.1.4", "0.1.4")).toBe("v0.1.5");
+    expect(resolveReleaseTag(undefined, undefined, "1/merge", "0.1.5")).toBe("v0.1.5");
+    expect(resolveReleaseTag(undefined, "branch", "main", "0.1.5")).toBe("v0.1.5");
+    expect(resolveReleaseTag(undefined, "tag", "v0.1.5", "0.1.5")).toBe("v0.1.5");
+    expect(resolveReleaseTag("v0.1.6", "tag", "v0.1.5", "0.1.5")).toBe("v0.1.6");
   });
 
   test("rejects malformed or inconsistent versions", () => {
-    expect(() => assertReleaseVersion("release-0.1.4", "0.1.4", "0.1.4")).toThrow("strict vX.Y.Z");
-    expect(() => assertReleaseVersion("v0.1.5", "0.1.4", "0.1.4")).toThrow("package version");
-    expect(() => assertReleaseVersion("v0.1.4", "0.1.4", "0.1.3")).toThrow("manifest version");
+    expect(() => assertReleaseVersion("release-0.1.5", "0.1.5", "0.1.5")).toThrow("strict vX.Y.Z");
+    expect(() => assertReleaseVersion("v0.1.6", "0.1.5", "0.1.5")).toThrow("package version");
+    expect(() => assertReleaseVersion("v0.1.5", "0.1.5", "0.1.4")).toThrow("manifest version");
+  });
+
+  test("uses explicit capabilities and only the vNext renderer lifecycle", () => {
+    const manifest = JSON.parse(readFileSync(path.join(import.meta.dir, "..", ".zdp", "plugin.json"), "utf8"));
+    expect(manifest.engines.host).toBe(">=0.3.4 <1");
+    expect(manifest.capabilities).toEqual([
+      "zcode.workspaces.read",
+      "zcode.tasks.run",
+      "ui.pages",
+      "ui.overlays",
+    ]);
+    expect(schedulerRenderer.mountPage).toBeFunction();
+    expect(schedulerRenderer.mount).toBeUndefined();
   });
 });
diff --git a/tests/scheduler.test.ts b/tests/scheduler.test.ts
index 9c864c1..a3395a7 100644
--- a/tests/scheduler.test.ts
+++ b/tests/scheduler.test.ts
@@ -129,7 +129,7 @@ function createContext(dataDir: string) {
       apiVersion: 1,
       id: "scheduler",
       name: "Scheduler",
-      version: "0.1.4",
+      version: "0.1.5",
       entrypoints: {},
       engines: {host: ">=0.2.0 <1", zcode: ">=3.3.6"},
       pages: [{id: "jobs", title: "Scheduler"}],