diff --git a/packages/block-editor/README.md b/packages/block-editor/README.md
index 016ff865..d1d1553a 100644
--- a/packages/block-editor/README.md
+++ b/packages/block-editor/README.md
@@ -1,4 +1,42 @@
 # @wrnexus/block-editor
 
-Hydrated editor state and DOM runtime for portable block documents. All changes
-flow through validated `@wrnexus/blocks` commands; DnD produces move intents.
+Reusable editor state, DOM surfaces, inspector drafts, clipboard-download UI,
+selection actions, and explicit block/preset composition.
+
+## Configure a builder
+
+```ts
+import { createBuilderKit, createBlockEditorState, mountBlockCanvas } from "@wrnexus/block-editor";
+import { emailEditorBlocks } from "@wrnexus/email-renderer/create";
+import { emailPresets } from "@wrnexus/email-renderer/presets";
+
+const builder = createBuilderKit({
+  blocks: [...emailEditorBlocks, myTrustedBlockDefinition],
+  presets: [...emailPresets, myTrustedSectionPreset],
+});
+
+const palette = builder.blocks(); // manifests: name, icon, category, schemas
+const presets = builder.presets();
+const node = builder.createBlock("custom.my-block", { id: () => crypto.randomUUID() });
+```
+
+Definitions use `defineBlock` from `@wrnexus/blocks`: manifest, create,
+renderers, textRenderer, inspector controls, and migrations. Presets have
+`id`, localized `name`, `icon`, and `create({ id })`. Registration is
+explicit and frozen; duplicates and invalid created trees throw before insertion.
+Factories must return schema-valid instances. Placement still goes through the
+document-kind command validator; kit validation is not publish authorization.
+
+Use the same trusted definitions in your document kind and server renderer.
+Adding a block to a palette alone does not enable its rendering or publishing.
+The built-in email production adapter currently uses its core email kind; custom
+email target composition and a complete high-level editor component remain work
+in progress.
+
+The package exports `InspectorDrafts`, `builderOutlineLabel`,
+`builderDragAnnouncement`, `updateBuilderCanvas`, `showBuilderBlockActions`,
+`editBuilderText`, `showImageFallbacks`, and `offerBuilderDownload`.
+These are low-level reusable surfaces, not a drop-in complete studio yet.
+The host owns authenticated load/save/render/asset service callbacks.
+`createBlockEditorState` uses validated commands; host applications must actually
+wire it rather than assuming all application mutations already use that state.
diff --git a/packages/block-editor/package.json b/packages/block-editor/package.json
index c57eb759..a3536ec3 100644
--- a/packages/block-editor/package.json
+++ b/packages/block-editor/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/block-editor",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "type": "module",
   "description": "Hydrated accessible editor runtime for WRNexus block documents.",
   "exports": {
diff --git a/packages/block-editor/src/announcements.ts b/packages/block-editor/src/announcements.ts
new file mode 100644
index 00000000..e2f4c9f3
--- /dev/null
+++ b/packages/block-editor/src/announcements.ts
@@ -0,0 +1,31 @@
+type DragEvent = "pickedUp" | "movedOver" | "invalid" | "dropped" | "cancelled";
+
+const messages: Record<string, Record<DragEvent, string>> = {
+  en: {
+    pickedUp: "Block picked up. Use arrow keys to move, Space to drop, or Escape to cancel.",
+    movedOver: "Block moved over a drop position.",
+    invalid: "This location does not accept the block.",
+    dropped: "Block moved.",
+    cancelled: "Move cancelled. Original block order restored.",
+  },
+  hi: {
+    pickedUp:
+      "ब्लॉक चुन लिया गया है। स्थान बदलने के लिए तीर कुंजियाँ, रखने के लिए स्पेस और रद्द करने के लिए एस्केप दबाएँ।",
+    movedOver: "ब्लॉक रखने की जगह बदल गई है।",
+    invalid: "इस स्थान पर यह ब्लॉक नहीं रखा जा सकता।",
+    dropped: "ब्लॉक का स्थान बदल दिया गया है।",
+    cancelled: "स्थान बदलना रद्द किया गया। ब्लॉक का मूल क्रम बहाल कर दिया गया है।",
+  },
+  ar: {
+    pickedUp: "تم التقاط الكتلة. استخدم مفاتيح الأسهم للتحريك، والمسافة للإفلات، وEscape للإلغاء.",
+    movedOver: "تم تحريك الكتلة فوق موضع إفلات.",
+    invalid: "هذا الموضع لا يقبل هذه الكتلة.",
+    dropped: "تم نقل الكتلة.",
+    cancelled: "تم إلغاء النقل واستعادة ترتيب الكتل الأصلي.",
+  },
+};
+
+export function builderDragAnnouncement(type: string, locale = "en"): string {
+  const catalog = messages[locale.toLowerCase().split(/[-_]/)[0]!] ?? messages.en!;
+  return Object.hasOwn(catalog, type) ? catalog[type as DragEvent] : "";
+}
diff --git a/packages/block-editor/src/download.ts b/packages/block-editor/src/download.ts
new file mode 100644
index 00000000..08757704
--- /dev/null
+++ b/packages/block-editor/src/download.ts
@@ -0,0 +1,33 @@
+const downloads = new WeakMap<HTMLElement, () => void>();
+
+/** Keep a direct user-gesture fallback until replaced or the editor is removed. */
+export function offerBuilderDownload(host: HTMLElement, content: string, type: string, filename: string): void {
+  const outlet = host.querySelector<HTMLElement>("[data-builder-download]");
+  if (!outlet) throw new Error("Download outlet is unavailable");
+  const url = URL.createObjectURL(new Blob([content], { type }));
+  const link = host.ownerDocument.createElement("a");
+  link.href = url;
+  link.download = filename;
+  link.textContent = `Download prepared file: ${filename}`;
+  let disposed = false;
+  const observer = new MutationObserver(() => { if (!host.isConnected) dispose(); });
+  const dispose = () => {
+    if (disposed) return;
+    disposed = true;
+    observer.disconnect();
+    URL.revokeObjectURL(url);
+    link.remove();
+    if (downloads.get(host) === dispose) downloads.delete(host);
+  };
+  try {
+    downloads.get(host)?.();
+    outlet.replaceChildren(link);
+    observer.observe(host.ownerDocument.documentElement, { childList: true, subtree: true });
+    downloads.set(host, dispose);
+  } catch (error) {
+    dispose();
+    throw error;
+  }
+  // A blocked automatic click must not destroy the direct-click fallback.
+  try { link.click(); } catch { /* The visible link remains available. */ }
+}
diff --git a/packages/block-editor/src/image-preview.ts b/packages/block-editor/src/image-preview.ts
new file mode 100644
index 00000000..7106a808
--- /dev/null
+++ b/packages/block-editor/src/image-preview.ts
@@ -0,0 +1,26 @@
+const placeholders = new WeakMap<Document, HTMLElement[]>();
+
+/** Preview-only fallbacks; never writes to the block document or export source. */
+export function showImageFallbacks(canvas: Document, enabled: boolean): void {
+  for (const previous of placeholders.get(canvas) ?? []) previous.remove();
+  placeholders.delete(canvas);
+  if (!enabled) return;
+  const created: HTMLElement[] = [];
+  for (const image of canvas.querySelectorAll<HTMLElement>("img,amp-img")) {
+    const fallback = canvas.createElement("span");
+    fallback.dataset.imageFallback = "";
+    const alt = image.getAttribute("alt") ?? "";
+    fallback.textContent = alt;
+    if (alt) { fallback.setAttribute("role", "img"); fallback.setAttribute("aria-label", alt); }
+    else fallback.setAttribute("aria-hidden", "true");
+    const width = Number(image.getAttribute("width")), height = Number(image.getAttribute("height"));
+    fallback.style.cssText = "display:flex;align-items:center;justify-content:center;box-sizing:border-box;border:1px dashed #64748b;color:#334155;background:#f1f5f9;font:14px Arial;padding:8px;overflow-wrap:anywhere;overflow:hidden;width:100%;min-height:32px;";
+    if (Number.isFinite(width) && width > 0 && width <= 4000) {
+      fallback.style.maxWidth = `${width}px`;
+      if (Number.isFinite(height) && height > 0 && height <= 4000) fallback.style.aspectRatio = `${width}/${height}`;
+    }
+    image.after(fallback);
+    created.push(fallback);
+  }
+  placeholders.set(canvas, created);
+}
diff --git a/packages/block-editor/src/index.ts b/packages/block-editor/src/index.ts
index 5b490bea..7946d4bc 100644
--- a/packages/block-editor/src/index.ts
+++ b/packages/block-editor/src/index.ts
@@ -2,3 +2,10 @@ export * from "./state.ts";
 export * from "./runtime.ts";
 export * from "./unsaved.ts";
 export * from "./canvas.ts";
+export * from "./inspector-drafts.ts";
+export * from "./outline.ts";
+export * from "./live-canvas.ts";
+export * from "./download.ts";
+export * from "./image-preview.ts";
+export * from "./announcements.ts";
+export * from "./kit.ts";
diff --git a/packages/block-editor/src/inspector-drafts.ts b/packages/block-editor/src/inspector-drafts.ts
new file mode 100644
index 00000000..b35edbfd
--- /dev/null
+++ b/packages/block-editor/src/inspector-drafts.ts
@@ -0,0 +1,64 @@
+type InspectorNode = { id: string; props: unknown; styles: unknown };
+export type InspectorValues = {
+  props: Record<string, string | boolean>;
+  styles: Record<string, { value: string; empty: string }>;
+};
+type Group = keyof InspectorValues;
+type Draft = { baseline: string; values: Record<string, unknown> };
+
+/** Session-only form drafts. Never included in documents, history, or exports. */
+export class InspectorDrafts {
+  private drafts = new Map<string, Partial<Record<Group, Draft>>>();
+
+  capture(node: InspectorNode, baseline: InspectorValues, current: InspectorValues) {
+    const draft: Partial<Record<Group, Draft>> = {};
+    for (const group of ["props", "styles"] as const) {
+      const values = Object.fromEntries(
+        Object.entries(current[group]).filter(
+          ([key, value]) => JSON.stringify(value) !== JSON.stringify(baseline[group][key]),
+        ),
+      );
+      if (Object.keys(values).length)
+        draft[group] = {
+          baseline: JSON.stringify(node[group] ?? {}),
+          values: structuredClone(values),
+        };
+    }
+    if (Object.keys(draft).length) this.drafts.set(node.id, draft);
+    else this.drafts.delete(node.id);
+  }
+
+  restore(node: InspectorNode, baseline: InspectorValues): InspectorValues {
+    const result = structuredClone(baseline),
+      draft = this.drafts.get(node.id);
+    if (!draft) return result;
+    for (const group of ["props", "styles"] as const) {
+      const saved = draft[group];
+      if (!saved) continue;
+      // An applied edit, undo, or server replacement takes precedence for that group.
+      if (saved.baseline !== JSON.stringify(node[group] ?? {})) {
+        delete draft[group];
+        continue;
+      }
+      for (const [key, value] of Object.entries(saved.values)) {
+        if (Object.hasOwn(result[group], key))
+          Object.assign(result[group], { [key]: structuredClone(value) });
+      }
+    }
+    if (!Object.keys(draft).length) this.drafts.delete(node.id);
+    return result;
+  }
+
+  discard(id: string) {
+    this.drafts.delete(id);
+  }
+  has(id: string) {
+    return this.drafts.has(id);
+  }
+  retain(ids: Set<string>) {
+    for (const id of this.drafts.keys()) if (!ids.has(id)) this.drafts.delete(id);
+  }
+  get size() {
+    return this.drafts.size;
+  }
+}
diff --git a/packages/block-editor/src/kit.ts b/packages/block-editor/src/kit.ts
new file mode 100644
index 00000000..95a81367
--- /dev/null
+++ b/packages/block-editor/src/kit.ts
@@ -0,0 +1,79 @@
+import { createRegistry, type BlockDefinition, type BlockNode, type LocalizedLabel } from "@wrnexus/blocks";
+
+export interface BuilderCreateContext { id(): string }
+export interface BuilderPreset {
+  id: string;
+  name: LocalizedLabel;
+  icon: string;
+  create(context: BuilderCreateContext): BlockNode;
+}
+
+/** Trusted explicit configuration, not tenant-supplied executable code. */
+export function createBuilderKit(options: {
+  blocks: readonly BlockDefinition[];
+  presets?: readonly BuilderPreset[];
+}) {
+  const registry = createRegistry(options.blocks).freeze();
+  const presets = new Map<string, BuilderPreset>();
+  for (const preset of options.presets ?? []) {
+    if (!preset.id || !preset.name?.key || !preset.name.fallback || !preset.icon)
+      throw new Error("Preset id, localized name and icon are required");
+    if (presets.has(preset.id)) throw new Error("Duplicate preset: " + preset.id);
+    presets.set(preset.id, Object.freeze({ ...preset }));
+  }
+  const validateProps = (type: string, props: Record<string, unknown>): void => {
+    const definition = registry.get(type);
+    if (!definition) throw new Error("Unavailable block: " + type + ". Existing data must be preserved.");
+    const parsed = definition.manifest.props.parse(props, "props");
+    if (!parsed.ok) throw new Error(parsed.errors.map(error => (error.path ?? "props") + ": " + error.message).join("\n"));
+  };
+  const validateCreated = (root: BlockNode): BlockNode => {
+    const ids = new Set<string>();
+    const visit = (node: BlockNode, depth: number) => {
+      if (depth > 30 || ids.size >= 500) throw new Error("Created tree exceeds builder limits");
+      if (!node.id || ids.has(node.id)) throw new Error("Created node IDs must be nonempty and unique");
+      ids.add(node.id);
+      const definition = registry.get(node.type);
+      if (!definition || node.version !== definition.manifest.version) throw new Error("Unsupported created block version: " + node.type);
+      validateProps(node.type, node.props);
+      const styles = definition.manifest.styles.parse(node.styles, "styles");
+      if (!styles.ok) throw new Error(styles.errors.map(error => error.message).join("\n"));
+      for (const [name, children] of Object.entries(node.slots)) {
+        const slot = definition.manifest.slots[name];
+        if (!slot || !Array.isArray(children)) throw new Error("Unknown or invalid slot: " + name);
+        if (children.length < (slot.minChildren ?? 0) || children.length > (slot.maxChildren ?? 500)) throw new Error("Invalid slot size: " + name);
+        for (const child of children) {
+          const childDefinition = registry.get(child.type);
+          if (slot.accepts?.types && !slot.accepts.types.includes(child.type)) throw new Error("Slot rejects block type: " + child.type);
+          if (slot.accepts?.capabilities && !slot.accepts.capabilities.every(value => childDefinition?.manifest.capabilities?.includes(value))) throw new Error("Slot rejects block capabilities: " + child.type);
+          visit(child, depth + 1);
+        }
+      }
+      for (const [name, slot] of Object.entries(definition.manifest.slots))
+        if ((slot.minChildren ?? 0) > 0 && !node.slots[name]) throw new Error("Required slot missing: " + name);
+      const errors = definition.validate?.(node)?.filter(item => item.severity === "error");
+      if (errors?.length) throw new Error(errors.map(item => item.message).join("\n"));
+    };
+    const copy = structuredClone(root);
+    visit(copy, 0);
+    return copy;
+  };
+  return Object.freeze({
+    registry,
+    blocks: () => registry.list(),
+    presets: () => Object.freeze([...presets.values()]),
+    validateProps,
+    createBlock(type: string, context: BuilderCreateContext) {
+      const definition = registry.get(type);
+      if (!definition) throw new Error("Unavailable block: " + type);
+      const node = definition.create(context);
+      if (node.type !== type) throw new Error("Block factory returned a different type");
+      return validateCreated(node);
+    },
+    createPreset(id: string, context: BuilderCreateContext) {
+      const preset = presets.get(id);
+      if (!preset) throw new Error("Unavailable preset: " + id);
+      return validateCreated(preset.create(context));
+    },
+  });
+}
diff --git a/packages/block-editor/src/live-canvas.ts b/packages/block-editor/src/live-canvas.ts
new file mode 100644
index 00000000..cf7c209f
--- /dev/null
+++ b/packages/block-editor/src/live-canvas.ts
@@ -0,0 +1,66 @@
+/** Updates the existing sandbox document without navigating/reloading its iframe. */
+export function updateBuilderCanvas(frame: HTMLIFrameElement, html: string): void {
+  const canvas = frame.contentDocument;
+  if (!canvas?.body) return;
+  const parsed = new DOMParser().parseFromString(html, "text/html");
+  const scrolling = canvas.scrollingElement;
+  const top = scrolling?.scrollTop ?? 0, left = scrolling?.scrollLeft ?? 0;
+  canvas.head.replaceChildren(...Array.from(parsed.head.childNodes).map(node => canvas.importNode(node, true)));
+  for (const attr of Array.from(canvas.body.attributes)) canvas.body.removeAttribute(attr.name);
+  for (const attr of Array.from(parsed.body.attributes)) canvas.body.setAttribute(attr.name, attr.value);
+  canvas.body.replaceChildren(...Array.from(parsed.body.childNodes).map(node => canvas.importNode(node, true)));
+  if (scrolling) { scrolling.scrollTop = top; scrolling.scrollLeft = left; }
+}
+
+/** Selection controls are editor decorations, never part of saved/exported HTML. */
+export function showBuilderBlockActions(canvas: Document, id: string, label: string, actions: Record<string, () => void>): void {
+  canvas.querySelector("[data-builder-block-actions]")?.remove();
+  const block = Array.from(canvas.querySelectorAll<HTMLElement>("[data-block-id]")).find(item => item.dataset.blockId === id);
+  if (!block) return;
+  const toolbar = canvas.createElement("div");
+  toolbar.dataset.builderBlockActions = "";
+  toolbar.setAttribute("role", "toolbar");
+  toolbar.setAttribute("aria-label", label + " actions");
+  toolbar.style.cssText = "position:absolute;z-index:100;display:flex;flex-wrap:wrap;gap:4px;align-items:center;padding:6px;box-sizing:border-box;max-width:100%;background:#111827;color:white;font:12px Arial;box-shadow:0 2px 8px #0003";
+  const name = canvas.createElement("strong");
+  name.textContent = label;
+  name.style.cssText = "margin-inline-end:auto";
+  toolbar.append(name);
+  for (const [name, action] of Object.entries(actions)) {
+    const button = canvas.createElement("button");
+    button.type = "button";
+    button.textContent = name;
+    button.style.cssText = "border:1px solid #64748b;border-radius:4px;background:#1f2937;color:white;padding:5px 8px;cursor:pointer";
+    button.addEventListener("click", event => { event.preventDefault(); event.stopPropagation(); action(); });
+    toolbar.append(button);
+  }
+  // Keep controls outside presentation tables so browser table repair cannot move them.
+  canvas.body.prepend(toolbar);
+  const bounds = block.getBoundingClientRect();
+  toolbar.style.top = Math.max(0, bounds.top + (canvas.defaultView?.scrollY ?? 0) - toolbar.offsetHeight) + "px";
+  toolbar.style.left = Math.max(0, Math.min(bounds.left, canvas.documentElement.clientWidth - toolbar.offsetWidth)) + "px";
+  block.setAttribute("aria-label", label + " selected");
+}
+
+/** Text remains a string, not pasted HTML. The owner validates every committed value. */
+export function editBuilderText(canvas: Document, id: string, value: string, update: (text: string) => void, finish: () => void): boolean {
+  const block = Array.from(canvas.querySelectorAll<HTMLElement>("[data-block-id]")).find(item => item.dataset.blockId === id);
+  const element = block?.querySelector<HTMLElement>("h1,h2,h3,h4,p");
+  if (!element) return false;
+  element.textContent = value;
+  element.contentEditable = "plaintext-only";
+  element.setAttribute("role", "textbox");
+  element.setAttribute("aria-label", "Edit block text");
+  element.style.whiteSpace = "pre-wrap";
+  element.addEventListener("input", () => update(element.innerText));
+  element.addEventListener("keydown", event => {
+    event.stopPropagation();
+    if (event.key === "Escape") { event.preventDefault(); element.blur(); }
+  });
+  element.addEventListener("blur", () => {
+    element.contentEditable = "false";
+    finish();
+  }, { once: true });
+  element.focus({ preventScroll: true });
+  return true;
+}
diff --git a/packages/block-editor/src/outline.ts b/packages/block-editor/src/outline.ts
new file mode 100644
index 00000000..52ac8537
--- /dev/null
+++ b/packages/block-editor/src/outline.ts
@@ -0,0 +1,17 @@
+import type { BlockNode } from "@wrnexus/blocks";
+
+/** Plain text only; callers must assign this to textContent, never innerHTML. */
+export function builderOutlineLabel(
+  node: BlockNode,
+  definition?: { name?: { fallback?: string } },
+): string {
+  const name = definition?.name?.fallback || node.type;
+  const props = node.props ?? {};
+  const candidate = [props.text, props.label, props.title, props.question, props.alt]
+    .find(value => typeof value === "string" && value.trim());
+  const detail = typeof candidate === "string"
+    ? candidate.replace(/\s+/g, " ").trim()
+    : node.type === "layout.column" && typeof props.width === "string" ? props.width : "";
+  const bounded = Array.from(detail);
+  return detail ? `${name} — ${bounded.slice(0, 64).join("")}${bounded.length > 64 ? "…" : ""}` : name;
+}
diff --git a/packages/block-editor/test/announcements.test.ts b/packages/block-editor/test/announcements.test.ts
new file mode 100644
index 00000000..375a9c30
--- /dev/null
+++ b/packages/block-editor/test/announcements.test.ts
@@ -0,0 +1,17 @@
+import { expect, test } from "bun:test";
+import { builderDragAnnouncement } from "../src/announcements.ts";
+
+test("drag messages cover every lifecycle event in supported locales", () => {
+  for (const event of ["pickedUp", "movedOver", "invalid", "dropped", "cancelled"]) {
+    for (const locale of ["en", "hi", "ar"]) {
+      const message = builderDragAnnouncement(event, locale);
+      expect(message.length).toBeGreaterThan(10);
+      expect(message).not.toBe(event);
+      expect(builderDragAnnouncement(event, `${locale}-IN`)).toBe(message);
+    }
+  }
+  expect(builderDragAnnouncement("dropped", "unknown")).toBe(
+    builderDragAnnouncement("dropped", "en"),
+  );
+  expect(builderDragAnnouncement("toString")).toBe("");
+});
diff --git a/packages/block-editor/test/download.test.ts b/packages/block-editor/test/download.test.ts
new file mode 100644
index 00000000..df13eeb4
--- /dev/null
+++ b/packages/block-editor/test/download.test.ts
@@ -0,0 +1,23 @@
+import { expect, test } from "bun:test";
+import { readFileSync } from "node:fs";
+
+const source = new Bun.Transpiler({ loader: "ts" }).transformSync(readFileSync(new URL("../src/download.ts", import.meta.url), "utf8")).replace("export function", "function");
+
+test("download keeps direct link after blocked automatic click and releases replaced/detached blobs", () => {
+  const revoked: string[] = [], observers: Array<{ callback(): void; disconnect(): void }> = [];
+  let sequence = 0, clicks = 0, disconnected = 0;
+  const links: any[] = [];
+  const outlet = { replaceChildren: (link: unknown) => { links.splice(0, links.length, link); } };
+  const host = { isConnected: true, querySelector: () => outlet, ownerDocument: { documentElement: {}, createElement: () => ({ href: "", download: "", textContent: "", click() { clicks++; throw new Error("blocked"); }, remove() { const index = links.indexOf(this); if (index >= 0) links.splice(index, 1); } }) } };
+  const offer = new Function("URL", "Blob", "MutationObserver", source + ";return offerBuilderDownload;")(
+    { createObjectURL: () => `blob:${++sequence}`, revokeObjectURL: (url: string) => revoked.push(url) }, Blob,
+    class { constructor(public callback: () => void) { observers.push(this); } observe() {} disconnect() { disconnected++; } },
+  );
+  offer(host, "html", "text/html", "draft.html");
+  expect(links[0].href).toBe("blob:1"); expect(links[0].download).toBe("draft.html");
+  expect(revoked).toEqual([]); expect(clicks).toBe(1);
+  offer(host, "text", "text/plain", "draft.txt");
+  expect(revoked).toEqual(["blob:1"]); expect(links[0].download).toBe("draft.txt");
+  host.isConnected = false; observers[1]!.callback(); observers[1]!.callback();
+  expect(revoked).toEqual(["blob:1", "blob:2"]); expect(links).toEqual([]); expect(disconnected).toBe(2);
+});
diff --git a/packages/block-editor/test/image-preview.test.ts b/packages/block-editor/test/image-preview.test.ts
new file mode 100644
index 00000000..93aaeff2
--- /dev/null
+++ b/packages/block-editor/test/image-preview.test.ts
@@ -0,0 +1,26 @@
+import { expect, test } from "bun:test";
+import { showImageFallbacks } from "../src/image-preview.ts";
+
+test("image-disabled mode exposes safe alt text, proportions and reversible placeholders", () => {
+  const displayed: any[] = [];
+  const images = [{ alt: '<b>Logo & name</b>', width: '320', height: '180' }, { alt: '', width: 'not a size', height: '99999' }].map(attributes => ({
+    getAttribute: (key: string) => (attributes as Record<string, string>)[key] ?? null,
+    after: (element: unknown) => displayed.push(element),
+  }));
+  const canvas = {
+    querySelectorAll: () => images,
+    createElement: () => ({ dataset: {}, style: {} as Record<string, string>, textContent: "", attributes: {} as Record<string, string>, setAttribute(key: string, value: string) { this.attributes[key] = value; }, remove() { const index = displayed.indexOf(this); if (index >= 0) displayed.splice(index, 1); } }),
+  } as unknown as Document;
+  showImageFallbacks(canvas, true);
+  expect(displayed).toHaveLength(2);
+  expect(displayed[0].textContent).toBe('<b>Logo & name</b>');
+  expect(displayed[0].attributes['aria-label']).toBe('<b>Logo & name</b>');
+  expect(displayed[0].style.aspectRatio).toBe('320/180');
+  expect(displayed[1].attributes['aria-hidden']).toBe('true');
+  expect(displayed[1].style.maxWidth).toBeUndefined();
+  showImageFallbacks(canvas, true);
+  expect(displayed).toHaveLength(2);
+  showImageFallbacks(canvas, false);
+  expect(displayed).toHaveLength(0);
+  expect(images[0]!.getAttribute('alt')).toBe('<b>Logo & name</b>');
+});
diff --git a/packages/block-editor/test/inspector-drafts.test.ts b/packages/block-editor/test/inspector-drafts.test.ts
new file mode 100644
index 00000000..739f8300
--- /dev/null
+++ b/packages/block-editor/test/inspector-drafts.test.ts
@@ -0,0 +1,62 @@
+import { expect, test } from "bun:test";
+import { InspectorDrafts, type InspectorValues } from "../src/inspector-drafts.ts";
+
+const node = { id: "text", props: { text: "Saved" }, styles: {} };
+const baseline: InspectorValues = {
+  props: { text: "Saved", decorative: false },
+  styles: { fontSize: { value: "", empty: "true" } },
+};
+const edited: InspectorValues = {
+  props: { text: "Typing", decorative: true },
+  styles: { fontSize: { value: "20px", empty: "" } },
+};
+
+test("selection and preview remount preserve independent props, checkbox, and style drafts", () => {
+  const store = new InspectorDrafts();
+  store.capture(node, baseline, edited);
+  expect(store.restore({ ...node, id: "other" }, baseline)).toEqual(baseline);
+  expect(store.restore(node, baseline)).toEqual(edited);
+  expect(store.restore(node, baseline)).toEqual(edited);
+  expect(node.props.text).toBe("Saved");
+  expect(store.size).toBe(1);
+});
+
+test("applying content does not discard pending style changes or resurrect applied content", () => {
+  const store = new InspectorDrafts();
+  store.capture(node, baseline, edited);
+  const applied = { ...node, props: { text: "Typing" } };
+  const next = { ...baseline, props: { ...baseline.props, text: "Typing" } };
+  expect(store.restore(applied, next)).toEqual({ ...next, styles: edited.styles });
+  expect(store.restore(node, baseline).props).toEqual(baseline.props);
+});
+
+test("applying styles does not erase content drafts", () => {
+  const store = new InspectorDrafts();
+  store.capture(node, baseline, edited);
+  const applied = { ...node, styles: { fontSize: { base: "20px" } } };
+  const next = { ...baseline, styles: edited.styles };
+  expect(store.restore(applied, next)).toEqual({ props: edited.props, styles: edited.styles });
+});
+
+test("reverting fields, discarding, and deleting blocks release their drafts", () => {
+  const store = new InspectorDrafts();
+  store.capture(node, baseline, edited);
+  store.capture(node, baseline, baseline);
+  expect(store.size).toBe(0);
+  store.capture(node, baseline, edited);
+  store.discard(node.id);
+  expect(store.restore(node, baseline)).toEqual(baseline);
+  store.capture(node, baseline, edited);
+  store.retain(new Set(["other"]));
+  expect(store.size).toBe(0);
+});
+
+test("capture and restore do not share mutable control snapshots", () => {
+  const store = new InspectorDrafts(),
+    draft = structuredClone(edited);
+  store.capture(node, baseline, draft);
+  draft.styles.fontSize!.value = "99px";
+  const restored = store.restore(node, baseline);
+  restored.styles.fontSize!.value = "88px";
+  expect(store.restore(node, baseline).styles.fontSize!.value).toBe("20px");
+});
diff --git a/packages/block-editor/test/kit.test.ts b/packages/block-editor/test/kit.test.ts
new file mode 100644
index 00000000..308d2218
--- /dev/null
+++ b/packages/block-editor/test/kit.test.ts
@@ -0,0 +1,31 @@
+import { expect, test } from "bun:test";
+import { defineBlock, object, string } from "@wrnexus/blocks";
+import { createBuilderKit } from "../src/kit.ts";
+
+const block = defineBlock({
+  manifest: { type: "custom.note", version: 1, name: { key: "note", fallback: "Note" }, icon: "note", category: "content",
+    props: object({ text: string({ min: 1 }) }), styles: object({}), slots: {} },
+  create: ({ id }: { id(): string }) => ({ id: id(), type: "custom.note", version: 1, props: { text: "Hello" }, styles: {}, slots: {} }),
+});
+test("trusted custom blocks and presets expose independent instances and explicit metadata", () => {
+  let next = 0; const context = { id: () => String(++next) };
+  const kit = createBuilderKit({ blocks: [block], presets: [{ id: "note", name: { key: "preset.note", fallback: "Note" }, icon: "note", create: block.create }] });
+  expect(kit.blocks()[0].manifest.name.fallback).toBe("Note");
+  expect(kit.presets()[0].id).toBe("note");
+  const first = kit.createBlock("custom.note", context), second = kit.createPreset("note", context);
+  first.props.text = "Changed";
+  expect(second.props.text).toBe("Hello");
+  expect(first.id).not.toBe(second.id);
+  expect(Object.isFrozen(kit)).toBe(true);
+  expect(() => kit.validateProps("custom.note", { text: "" })).toThrow();
+  expect(() => kit.createBlock("missing.block", context)).toThrow();
+});
+test("duplicate registration and invalid factories fail before insertion", () => {
+  expect(() => createBuilderKit({ blocks: [block, block] })).toThrow();
+  const preset = { id: "note", name: { key: "note", fallback: "Note" }, icon: "note", create: block.create };
+  expect(() => createBuilderKit({ blocks: [block], presets: [preset, preset] })).toThrow();
+  const invalid = createBuilderKit({ blocks: [{ ...block, create: () => ({ ...block.create({ id: () => "id" }), props: { text: "" } }) }] });
+  expect(() => invalid.createBlock("custom.note", { id: () => "id" })).toThrow();
+  const wrong = createBuilderKit({ blocks: [{ ...block, create: () => ({ ...block.create({ id: () => "id" }), type: "custom.other" }) }] });
+  expect(() => wrong.createBlock("custom.note", { id: () => "id" })).toThrow();
+});
diff --git a/packages/block-editor/test/outline.test.ts b/packages/block-editor/test/outline.test.ts
new file mode 100644
index 00000000..0bbf625a
--- /dev/null
+++ b/packages/block-editor/test/outline.test.ts
@@ -0,0 +1,20 @@
+import { expect, test } from "bun:test";
+import type { BlockNode } from "@wrnexus/blocks";
+import { builderOutlineLabel } from "../src/outline.ts";
+
+const node = (props: BlockNode["props"], type = "content.button"): BlockNode => ({ id: "n", type, version: 1, props, styles: {}, slots: {} });
+
+test("outline uses registered names and distinguishes content without mutating it", () => {
+  const block = node({ label: " Buy\n  now " });
+  expect(builderOutlineLabel(block, { name: { fallback: "Button" } })).toBe("Button — Buy now");
+  expect(block.props.label).toBe(" Buy\n  now ");
+  expect(builderOutlineLabel(node({ width: "35%" }, "layout.column"), { name: { fallback: "Column" } })).toBe("Column — 35%");
+  expect(builderOutlineLabel(node({}, "custom.unknown"))).toBe("custom.unknown");
+});
+
+test("outline bounds Unicode snippets and treats content as plain text", () => {
+  const label = builderOutlineLabel(node({ label: "😀".repeat(65) }), { name: { fallback: "Button" } });
+  expect(label).toBe("Button — " + "😀".repeat(64) + "…");
+  expect(builderOutlineLabel(node({ label: '<img onerror="bad">' }))).toContain('<img onerror="bad">');
+  expect(builderOutlineLabel(node({ text: {}, label: "", title: "Product title" }))).toBe("content.button — Product title");
+});
diff --git a/packages/email-renderer/package.json b/packages/email-renderer/package.json
index 38ae52f0..b787e6fc 100644
--- a/packages/email-renderer/package.json
+++ b/packages/email-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/email-renderer",
-  "version": "0.1.44",
+  "version": "0.1.45",
   "type": "module",
   "description": "WRNexus block email renderers with HTML, text, AMP Email, and MJML interoperability.",
   "exports": {
@@ -8,6 +8,7 @@
     "./blocks": "./src/blocks.ts",
     "./browser": "./src/browser.ts",
     "./create": "./src/create.ts",
+    "./presets": "./src/presets.ts",
     "./style-values": "./src/style-values.ts"
   },
   "files": [
diff --git a/packages/email-renderer/src/create.ts b/packages/email-renderer/src/create.ts
index a52b3e83..8f16bdfe 100644
--- a/packages/email-renderer/src/create.ts
+++ b/packages/email-renderer/src/create.ts
@@ -1,6 +1,13 @@
 import type { BlockNode } from "@wrnexus/blocks";
 import { emailCoreBlocks } from "./blocks.ts";
 
+/** Complete trusted editor pack, including schema-valid content factories. */
+export const emailEditorBlocks = emailCoreBlocks.map(definition =>
+  definition.manifest.category === "content" || definition.manifest.type.startsWith("commerce.")
+    ? { ...definition, create: (context: { id(): string }) => createEmailBlock(definition.manifest.type, context) }
+    : definition,
+);
+
 /** Canonical initial content for palette blocks; time and instance IDs are injectable. */
 export function createEmailBlock(type: string, context: { id(): string; now?: number }): BlockNode {
   const now = context.now ?? Date.now();
diff --git a/packages/email-renderer/src/presets.ts b/packages/email-renderer/src/presets.ts
new file mode 100644
index 00000000..5c1ad7ab
--- /dev/null
+++ b/packages/email-renderer/src/presets.ts
@@ -0,0 +1,58 @@
+import type { BlockNode, JsonObject } from "@wrnexus/blocks";
+
+export function createSectionPreset(name: string, id: () => string): BlockNode {
+  const node = (
+    type: string,
+    props: JsonObject,
+    slots: Record<string, BlockNode[]> = {},
+  ): BlockNode => ({
+    id: id(),
+    type,
+    version: 1,
+    props,
+    styles: {},
+    slots,
+  });
+  const text = (value: string) => node("content.text", { text: value });
+  const heading = (value: string) => node("content.heading", { text: value, level: "2" });
+  const button = (label: string, href: string) => node("content.button", { label, href });
+  let content: BlockNode[];
+  if (name === "welcome")
+    content = [
+      heading("Welcome, {{recipientName|friend}}!"),
+      text("We’re glad you’re here. Discover what’s new and find your next favorite."),
+      button("Explore now", "https://example.com"),
+    ];
+  else if (name === "feature")
+    content = [
+      node("content.image", {
+        src: "https://placehold.co/600x300",
+        alt: "Replace with your featured image",
+        width: "600",
+        height: "300",
+        decorative: false,
+      }),
+      heading("Something worth sharing"),
+      text("Introduce your product, tell your story, or share your latest announcement."),
+      button("Learn more", "https://example.com"),
+    ];
+  else if (name === "footer")
+    content = [
+      node("content.divider", {}),
+      text("Thank you for being part of our community."),
+      text("{{organizationAddress|Add your organization address}}"),
+      button("Unsubscribe", "{{unsubscribeUrl|https://example.com/unsubscribe}}"),
+    ];
+  else throw new Error("Unknown section preset.");
+  const column = node("layout.column", { width: "100%" }, { content });
+  const columns = node("layout.columns", {}, { columns: [column] });
+  return node("layout.section", { background: "#ffffff", padding: "24px" }, { content: [columns] });
+}
+
+/** Native, editable section presets; no HTML snapshots. */
+export const emailPresets = ["welcome", "feature", "footer"].map(id => ({
+  id,
+  name: { key: "email.presets." + id, fallback: id[0].toUpperCase() + id.slice(1) },
+  icon: "icon-[lucide--layout-template]",
+  create: (context: { id(): string }) => createSectionPreset(id, context.id),
+}));
diff --git a/packages/email-renderer/test/editor-pack.test.ts b/packages/email-renderer/test/editor-pack.test.ts
new file mode 100644
index 00000000..c5d0807a
--- /dev/null
+++ b/packages/email-renderer/test/editor-pack.test.ts
@@ -0,0 +1,25 @@
+import { expect, test } from "bun:test";
+import { emailEditorBlocks } from "../src/create.ts";
+import { emailPresets } from "../src/presets.ts";
+
+test("published email editor content factories return valid independent instances", () => {
+  let id = 0;
+  for (const definition of emailEditorBlocks.filter(block => block.manifest.category === "content")) {
+    const first = definition.create({ id: () => String(++id) });
+    const second = definition.create({ id: () => String(++id) });
+    expect(first.id).not.toBe(second.id);
+    expect(definition.manifest.props.parse(first.props).ok).toBe(true);
+    expect(first.type).toBe(definition.manifest.type);
+  }
+});
+test("published presets expose metadata and remap all instance IDs on creation", () => {
+  let id = 0;
+  for (const preset of emailPresets) {
+    const first = preset.create({ id: () => String(++id) });
+    const second = preset.create({ id: () => String(++id) });
+    expect(preset.name.key).toBeTruthy();
+    expect(preset.icon).toBeTruthy();
+    expect(first.type).toBe("layout.section");
+    expect(first.id).not.toBe(second.id);
+  }
+});