diff --git a/packages/core/src/__tests__/inspector.test.ts b/packages/core/src/__tests__/inspector.test.ts
index 5ef85db..f8a341b 100644
--- a/packages/core/src/__tests__/inspector.test.ts
+++ b/packages/core/src/__tests__/inspector.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect, afterEach, vi } from 'vitest';
-import { createAskableContext } from '../index.js';
+import { createAskableContext, createAskableSource } from '../index.js';
 import { createAskableInspector } from '../inspector.js';
 
 function makeEl(meta: object | string, text = ''): HTMLElement {
@@ -10,6 +10,12 @@ function makeEl(meta: object | string, text = ''): HTMLElement {
   return el;
 }
 
+async function waitForInspectorPreview() {
+  await Promise.resolve();
+  await Promise.resolve();
+  await new Promise((resolve) => setTimeout(resolve, 0));
+}
+
 describe('createAskableInspector', () => {
   const elements: HTMLElement[] = [];
 
@@ -109,6 +115,35 @@ describe('createAskableInspector', () => {
     ctx.destroy();
   });
 
+  it('can show resolved source-backed prompt context in the panel', async () => {
+    const ctx = createAskableContext();
+    ctx.registerSource('accounts', createAskableSource({
+      kind: 'collection',
+      describe: 'Accounts matching filters',
+      state: { filter: 'enterprise' },
+      modes: {
+        all: { total: 2, companies: ['Acme Corp', 'Beta Labs'] },
+      },
+    }));
+    const inspector = createAskableInspector(ctx, {
+      sourcePreview: {
+        sourceMode: 'all',
+        sourceLabel: 'Resolved sources',
+      },
+    });
+
+    await waitForInspectorPreview();
+
+    const panel = document.getElementById('askable-inspector')!;
+    expect(panel.textContent).toContain('Resolved sources');
+    expect(panel.textContent).toContain('accounts');
+    expect(panel.textContent).toContain('Acme Corp');
+    expect(panel.textContent).toContain('enterprise');
+
+    inspector.destroy();
+    ctx.destroy();
+  });
+
   it('updates context sources when registrations change', () => {
     const ctx = createAskableContext();
     const inspector = createAskableInspector(ctx);
@@ -351,6 +386,39 @@ describe('createAskableInspector', () => {
     ctx.destroy();
   });
 
+  it('copies source-backed prompt context when sourcePreview is enabled', async () => {
+    const writeText = vi.fn().mockResolvedValue(undefined);
+    const originalClipboard = navigator.clipboard;
+    Object.defineProperty(navigator, 'clipboard', {
+      value: { writeText },
+      configurable: true,
+    });
+
+    const ctx = createAskableContext();
+    ctx.registerSource('accounts', createAskableSource({
+      data: { total: 12, company: 'Acme Corp' },
+    }));
+    const inspector = createAskableInspector(ctx, { sourcePreview: true });
+
+    await waitForInspectorPreview();
+
+    document
+      .querySelector('[data-askable-inspector-copy]')!
+      .dispatchEvent(new MouseEvent('click', { bubbles: true }));
+
+    await Promise.resolve();
+
+    expect(writeText).toHaveBeenCalledWith(expect.stringContaining('Context sources'));
+    expect(writeText).toHaveBeenCalledWith(expect.stringContaining('Acme Corp'));
+
+    Object.defineProperty(navigator, 'clipboard', {
+      value: originalClipboard,
+      configurable: true,
+    });
+    inspector.destroy();
+    ctx.destroy();
+  });
+
   it('can hide built-in interaction test tools', () => {
     const ctx = createAskableContext();
     const inspector = createAskableInspector(ctx, { tools: false });
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 83d9e7b..34c4b48 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -27,6 +27,7 @@ export type {
   AskableInspectorHandle,
   AskableInspectorOptions,
   AskableInspectorPosition,
+  AskableInspectorSourcePreviewOptions,
 } from './inspector.js';
 export type {
   AskableRegionCaptureHandle,
diff --git a/packages/core/src/inspector.ts b/packages/core/src/inspector.ts
index 26c3d32..f5ae45b 100644
--- a/packages/core/src/inspector.ts
+++ b/packages/core/src/inspector.ts
@@ -1,7 +1,11 @@
 import type {
+  AskableAsyncPromptContextOptions,
   AskableContext,
   AskableContextSourceInfo,
   AskableFocus,
+  AskableContextSourceInclude,
+  AskableContextSourceErrorMode,
+  AskableContextSourceMode,
   AskablePromptContextOptions,
 } from './types.js';
 import { createAskableRegionCapture } from './capture.js';
@@ -11,6 +15,17 @@ import type { AskableTextSelectionCaptureHandle } from './selection.js';
 
 export type AskableInspectorPosition = 'bottom-right' | 'bottom-left' | 'top-right' | 'top-left';
 
+export interface AskableInspectorSourcePreviewOptions {
+  /** Sources to include in the inspector prompt preview. Defaults to all registered sources. */
+  sources?: 'all' | AskableContextSourceInclude[];
+  /** Default source mode when a source request omits mode. Defaults to "summary". */
+  sourceMode?: AskableContextSourceMode;
+  /** Heading used in the prompt preview. Defaults to "Context sources". */
+  sourceLabel?: string;
+  /** How failed sources are shown in the inspector preview. Defaults to "include". */
+  sourceErrorMode?: AskableContextSourceErrorMode;
+}
+
 export interface AskableInspectorOptions {
   /**
    * Where to anchor the inspector panel.
@@ -21,6 +36,12 @@ export interface AskableInspectorOptions {
    * Serialization options passed to toPromptContext() for the output preview.
    */
   promptOptions?: AskablePromptContextOptions;
+  /**
+   * Include resolved app-owned sources in the prompt preview and Copy output.
+   * Pass true to include all registered sources with default source options.
+   * @default false
+   */
+  sourcePreview?: boolean | AskableInspectorSourcePreviewOptions;
   /**
    * Highlight the focused element with an outline.
    * @default true
@@ -60,8 +81,22 @@ function renderMeta(meta: Record<string, unknown> | string): string {
   return `{\n${lines}\n}`;
 }
 
+function buildPromptContextHTML(promptContext: string): string {
+  return `
+    <div>
+      <span style="color:#7ee787;font-size:10px;text-transform:uppercase;letter-spacing:.05em">Prompt context</span><br>
+      <pre style="color:#a5d6ff;margin:4px 0;white-space:pre-wrap;word-break:break-all">${escapeHtml(promptContext)}</pre>
+    </div>
+  `;
+}
+
 function buildFocusHTML(focus: AskableFocus | null, promptContext: string): string {
-  if (!focus) return '<div style="color:#8b949e;font-style:italic;padding:4px 0">No element focused</div>';
+  if (!focus) {
+    return `
+      <div style="color:#8b949e;font-style:italic;padding:4px 0">No element focused</div>
+      ${buildPromptContextHTML(promptContext)}
+    `;
+  }
   const el = focus.element;
   const tag = el ? el.tagName.toLowerCase() : null;
   const id = el?.id ? `#${escapeHtml(el.id)}` : '';
@@ -87,10 +122,7 @@ function buildFocusHTML(focus: AskableFocus | null, promptContext: string): stri
       <code style="color:#e6edf3">"${escapeHtml(focus.text.slice(0, 120))}${focus.text.length > 120 ? '…' : ''}"</code>
     </div>
     ` : ''}
-    <div>
-      <span style="color:#7ee787;font-size:10px;text-transform:uppercase;letter-spacing:.05em">Prompt context</span><br>
-      <pre style="color:#a5d6ff;margin:4px 0;white-space:pre-wrap;word-break:break-all">${escapeHtml(promptContext)}</pre>
-    </div>
+    ${buildPromptContextHTML(promptContext)}
   `;
 }
 
@@ -132,6 +164,24 @@ function buildPanelHTML(
   return `${buildFocusHTML(focus, promptContext)}${buildSourcesHTML(sources)}`;
 }
 
+function resolveSourcePreviewOptions(
+  promptOptions: AskablePromptContextOptions | undefined,
+  sourcePreview: true | AskableInspectorSourcePreviewOptions,
+): AskableAsyncPromptContextOptions {
+  if (sourcePreview === true) {
+    return {
+      ...promptOptions,
+      sources: 'all',
+    };
+  }
+
+  return {
+    ...promptOptions,
+    ...sourcePreview,
+    sources: sourcePreview.sources ?? 'all',
+  };
+}
+
 function clampPanelPosition(panel: HTMLElement, left: number, top: number): { left: number; top: number } {
   const rect = panel.getBoundingClientRect();
   const viewportWidth = window.innerWidth || document.documentElement.clientWidth || 0;
@@ -225,6 +275,7 @@ export function createAskableInspector(
   const {
     position = 'bottom-right',
     promptOptions,
+    sourcePreview = false,
     highlight = true,
     tools = true,
   } = options;
@@ -293,8 +344,10 @@ export function createAskableInspector(
 
   document.body.appendChild(panel);
 
+  let destroyed = false;
   let highlightedEl: HTMLElement | null = null;
   let latestPromptContext = '';
+  let updateVersion = 0;
 
   function clearHighlight() {
     if (highlightedEl) {
@@ -314,14 +367,35 @@ export function createAskableInspector(
     highlightedEl = el;
   }
 
-  function update(focus: AskableFocus | null) {
-    const promptContext = ctx.toPromptContext(promptOptions);
+  function renderFocusState(focus: AskableFocus | null, promptContext: string) {
     latestPromptContext = promptContext;
     body.innerHTML = buildPanelHTML(focus, promptContext, ctx.listSources());
     if (focus?.element?.isConnected) applyHighlight(focus.element);
     else clearHighlight();
   }
 
+  async function updateSourcePreview(focus: AskableFocus | null, version: number) {
+    if (!sourcePreview) return;
+    try {
+      const promptContext = await ctx.toPromptContextAsync(
+        resolveSourcePreviewOptions(promptOptions, sourcePreview),
+      );
+      if (destroyed || version !== updateVersion) return;
+      renderFocusState(focus, promptContext);
+    } catch {
+      if (destroyed || version !== updateVersion) return;
+      const fallback = `${ctx.toPromptContext(promptOptions)}\n\nContext sources:\nContext source unavailable.`;
+      renderFocusState(focus, fallback);
+    }
+  }
+
+  function update(focus: AskableFocus | null) {
+    const version = ++updateVersion;
+    const promptContext = ctx.toPromptContext(promptOptions);
+    renderFocusState(focus, promptContext);
+    if (sourcePreview) void updateSourcePreview(focus, version);
+  }
+
   // Initial render
   update(ctx.getFocus());
 
@@ -332,7 +406,6 @@ export function createAskableInspector(
   ctx.on('clear', clearHandler);
   ctx.on('sourcechange', sourceHandler);
 
-  let destroyed = false;
   let activeTool: InspectorToolHandle | null = null;
   let activeToolName: string | null = null;
   let dragging: {
diff --git a/packages/react/README.md b/packages/react/README.md
index ab6360a..27ca703 100644
--- a/packages/react/README.md
+++ b/packages/react/README.md
@@ -123,13 +123,15 @@ import { AskableInspector } from '@askable-ui/react';
 ```
 
 Pass the same `events`, `name`, `viewport`, or `ctx` that your React app uses for `useAskable()` when the inspector should follow the same context.
+Set `sourcePreview` when the dev panel should resolve registered source data in
+the prompt preview and Copy output.
 
 ```tsx
 function DevInspector() {
   useAskable({ events: ['click'] });
 
   return process.env.NODE_ENV === 'development'
-    ? <AskableInspector events={['click']} position="bottom-left" />
+    ? <AskableInspector events={['click']} position="bottom-left" sourcePreview />
     : null;
 }
 ```
diff --git a/packages/react/src/AskableInspector.tsx b/packages/react/src/AskableInspector.tsx
index b28349f..bb9e727 100644
--- a/packages/react/src/AskableInspector.tsx
+++ b/packages/react/src/AskableInspector.tsx
@@ -34,15 +34,18 @@ export function AskableInspector({
 }: AskableInspectorProps) {
   const { ctx } = useAskable({ ctx: providedCtx, name, events, viewport });
   const promptOptionsKey = JSON.stringify(inspectorOptions.promptOptions ?? null);
+  const sourcePreviewKey = JSON.stringify(inspectorOptions.sourcePreview ?? null);
 
   const stableInspectorOptions = useMemo(
     () => ({
       position: inspectorOptions.position,
       highlight: inspectorOptions.highlight,
+      tools: inspectorOptions.tools,
       promptOptions: inspectorOptions.promptOptions,
+      sourcePreview: inspectorOptions.sourcePreview,
     }),
     // eslint-disable-next-line react-hooks/exhaustive-deps
-    [ctx, inspectorOptions.position, inspectorOptions.highlight, promptOptionsKey],
+    [ctx, inspectorOptions.position, inspectorOptions.highlight, inspectorOptions.tools, promptOptionsKey, sourcePreviewKey],
   );
 
   useEffect(() => {
diff --git a/packages/react/src/__tests__/AskableInspector.test.tsx b/packages/react/src/__tests__/AskableInspector.test.tsx
index e2994ab..4774bd0 100644
--- a/packages/react/src/__tests__/AskableInspector.test.tsx
+++ b/packages/react/src/__tests__/AskableInspector.test.tsx
@@ -2,7 +2,7 @@ import { render, screen, waitFor, act } from '@testing-library/react';
 import { useState } from 'react';
 import { AskableInspector } from '../AskableInspector';
 import { useAskable } from '../useAskable';
-import { createAskableContext } from '@askable-ui/core';
+import { createAskableContext, createAskableSource } from '@askable-ui/core';
 
 function ClickOnlyConsumer() {
   const { focus } = useAskable({ events: ['click'] });
@@ -106,4 +106,21 @@ describe('AskableInspector', () => {
     view.unmount();
     ctx.destroy();
   });
+
+  it('forwards tools and sourcePreview options to the core inspector', async () => {
+    const ctx = createAskableContext();
+    ctx.registerSource('accounts', createAskableSource({
+      data: { company: 'Acme Corp' },
+    }));
+
+    const view = render(<AskableInspector ctx={ctx} tools={false} sourcePreview />);
+
+    expect(document.querySelector('[data-askable-inspector-tool="region"]')).toBeNull();
+    await waitFor(() => {
+      expect(document.getElementById('askable-inspector')?.textContent).toContain('Acme Corp');
+    });
+
+    view.unmount();
+    ctx.destroy();
+  });
 });
diff --git a/site/docs/api/core.md b/site/docs/api/core.md
index 282353a..540e9c4 100644
--- a/site/docs/api/core.md
+++ b/site/docs/api/core.md
@@ -818,6 +818,14 @@ const inspector = createAskableInspector(ctx);
 // Shows a draggable floating panel in the bottom-right corner with test tools.
 // Use Copy to copy the current prompt context exactly as the panel renders it.
 
+createAskableInspector(ctx, {
+  sourcePreview: {
+    sources: 'all',
+    sourceMode: 'summary',
+  },
+});
+// Includes resolved app-owned sources in the Prompt context preview and Copy output.
+
 // Tear down when done:
 inspector.destroy();
 ```
@@ -830,6 +838,7 @@ inspector.destroy();
 | `highlight` | `boolean` | `true` | Outline the focused element |
 | `tools` | `boolean` | `true` | Show buttons for region, circle, lasso, text selection, and clear |
 | `promptOptions` | `AskablePromptContextOptions` | — | Options passed to `toPromptContext()` for the preview |
+| `sourcePreview` | `boolean \| AskableInspectorSourcePreviewOptions` | `false` | Include resolved app-owned sources in the preview and Copy output |
 
 **Returns:** `AskableInspectorHandle` — object with `destroy()` method.
 
diff --git a/site/docs/api/react.md b/site/docs/api/react.md
index 4406c31..68d1683 100644
--- a/site/docs/api/react.md
+++ b/site/docs/api/react.md
@@ -89,7 +89,7 @@ import { AskableInspector } from '@askable-ui/react';
 ```
 
 **Props:**
-- all core `AskableInspectorOptions` props such as `position`, `highlight`, `tools`, and `promptOptions`
+- all core `AskableInspectorOptions` props such as `position`, `highlight`, `tools`, `promptOptions`, and `sourcePreview`
 - `ctx?: AskableContext` — reuse an explicit context
 - `name?: string` — match a named shared React context
 - `events?: AskableEvent[]` — match a shared React event configuration
@@ -112,6 +112,16 @@ function DashboardDevTools() {
 }
 ```
 
+Set `sourcePreview` to include registered source data in the inspector preview
+and Copy output:
+
+```tsx
+<AskableInspector
+  ctx={ctx}
+  sourcePreview={{ sources: [{ id: 'accounts', mode: 'summary' }] }}
+/>
+```
+
 ---
 
 ## `useAskable(options?)`
diff --git a/site/docs/guide/inspector.md b/site/docs/guide/inspector.md
index 18103a5..40a593b 100644
--- a/site/docs/guide/inspector.md
+++ b/site/docs/guide/inspector.md
@@ -58,6 +58,7 @@ createAskableInspector(ctx, {
   position: 'bottom-right',  // 'bottom-right' | 'bottom-left' | 'top-right' | 'top-left'
   highlight: true,           // outline the focused element
   tools: true,               // buttons for region, circle, lasso, text, and clear
+  sourcePreview: true,       // include registered source data in preview/copy
   promptOptions: {           // forwarded to toPromptContext()
     preset: 'compact',
   },
@@ -70,6 +71,19 @@ createAskableInspector(ctx, {
 | `highlight` | `boolean` | `true` | Draw an outline on the focused element |
 | `tools` | `boolean` | `true` | Show buttons for region, circle, lasso, text selection, and clear |
 | `promptOptions` | `AskablePromptContextOptions` | — | Options for the prompt output preview |
+| `sourcePreview` | `boolean \| AskableInspectorSourcePreviewOptions` | `false` | Resolve app-owned sources into the preview and Copy output |
+
+Use `sourcePreview` when you want the inspector to show the same source-backed
+context a chat bridge receives from `toPromptContextAsync()`.
+
+```ts
+createAskableInspector(ctx, {
+  sourcePreview: {
+    sources: [{ id: 'accounts', mode: 'all', maxItems: 20 }],
+    sourceErrorMode: 'include',
+  },
+});
+```
 
 ## React