diff --git a/src/config/normalize-runtime-settings.test.ts b/src/config/normalize-runtime-settings.test.ts
new file mode 100644
index 0000000..259ff17
--- /dev/null
+++ b/src/config/normalize-runtime-settings.test.ts
@@ -0,0 +1,65 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  normalizeNumberControlValue,
+  normalizeRuntimeSettings,
+} from './normalize-runtime-settings';
+import type { GardenRuntimeSettings } from './types';
+
+describe('normalizeNumberControlValue', () => {
+  it('clamps and rounds numeric controls', () => {
+    expect(
+      normalizeNumberControlValue(12.6, {
+        folder: 'Test',
+        integer: true,
+        max: 10,
+        min: 0,
+      })
+    ).toBe(10);
+
+    expect(
+      normalizeNumberControlValue(Number.NaN, {
+        folder: 'Test',
+        min: 3,
+      })
+    ).toBe(3);
+  });
+
+  it('keeps only declared option values', () => {
+    expect(
+      normalizeNumberControlValue(2, {
+        folder: 'Test',
+        options: { off: 0, on: 2 },
+      })
+    ).toBe(2);
+
+    expect(
+      normalizeNumberControlValue(3, {
+        folder: 'Test',
+        options: { off: 0, on: 2 },
+      })
+    ).toBe(0);
+  });
+});
+
+describe('normalizeRuntimeSettings', () => {
+  it('normalizes configured runtime keys and leaves hidden keys alone', () => {
+    const settings = {
+      brushSize: 99,
+      selectedColorIndex: 7,
+    } as GardenRuntimeSettings;
+
+    expect(
+      normalizeRuntimeSettings(settings, {
+        brushSize: {
+          folder: 'Brush',
+          max: 12,
+          min: 1,
+        },
+      })
+    ).toMatchObject({
+      brushSize: 12,
+      selectedColorIndex: 7,
+    });
+  });
+});
diff --git a/src/config/runtime-controls.ts b/src/config/runtime-controls.ts
index e07a259..e6b8a70 100644
--- a/src/config/runtime-controls.ts
+++ b/src/config/runtime-controls.ts
@@ -67,7 +67,7 @@ export const runtimeControls: GardenAppConfig['runtimeSettings']['controls'] = {
     folder: 'Movement',
     label: 'Travel Speed',
     min: 10,
-    max: 500,
+    max: 250,
     step: 1,
   },
   turnSpeed: {
@@ -116,6 +116,7 @@ export const runtimeControls: GardenAppConfig['runtimeSettings']['controls'] = {
 
   clarity: {
     folder: 'Look',
+    inverted: true,
     label: 'Sharpness',
     min: 0.00001,
     max: 1,
diff --git a/src/config/runtime-setting-bounds.ts b/src/config/runtime-setting-bounds.ts
new file mode 100644
index 0000000..5400912
--- /dev/null
+++ b/src/config/runtime-setting-bounds.ts
@@ -0,0 +1,4 @@
+export const INTERNAL_RENDER_AREA_MEGAPIXEL_LIMITS = {
+  min: 0.5,
+  max: 16.6,
+} as const;
diff --git a/src/config/types.ts b/src/config/types.ts
index 456dec8..6f9aa29 100644
--- a/src/config/types.ts
+++ b/src/config/types.ts
@@ -12,6 +12,7 @@ export interface NumberControlConfig {
   format?: (value: number) => string;
   folder: string;
   integer?: boolean;
+  inverted?: boolean;
   label?: string;
   max?: number;
   min?: number;
diff --git a/src/page/color-reaction-matrix-control.ts b/src/page/color-reaction-matrix-control.ts
new file mode 100644
index 0000000..ca78cbb
--- /dev/null
+++ b/src/page/color-reaction-matrix-control.ts
@@ -0,0 +1,187 @@
+import type { FolderApi } from '@tweakpane/core';
+
+import { appConfig, normalizeNumberControlValue } from '../config';
+import { activeVibe, settings } from '../settings';
+import { rgbColorToCss } from '../utils/rgb-color';
+
+type PaneContainer = Pick<FolderApi, 'addFolder'>;
+type ColorReactionKey = (typeof colorReactionRows)[number]['keys'][number];
+
+const COLOR_REACTION_LABELS = ['Color 1', 'Color 2', 'Color 3'] as const;
+const COLOR_REACTION_STATES = [
+  { id: 'follow', label: 'Move Toward', value: 1 },
+  { id: 'ignore', label: 'Ignore', value: 0 },
+  { id: 'avoid', label: 'Move Away', value: -1 },
+] as const;
+
+const colorReactionRows = [
+  {
+    colorIndex: 0,
+    label: COLOR_REACTION_LABELS[0],
+    keys: ['color1ToColor1', 'color1ToColor2', 'color1ToColor3'],
+  },
+  {
+    colorIndex: 1,
+    label: COLOR_REACTION_LABELS[1],
+    keys: ['color2ToColor1', 'color2ToColor2', 'color2ToColor3'],
+  },
+  {
+    colorIndex: 2,
+    label: COLOR_REACTION_LABELS[2],
+    keys: ['color3ToColor1', 'color3ToColor2', 'color3ToColor3'],
+  },
+] as const;
+
+const getColorReactionStateIndex = (value: number): number =>
+  COLOR_REACTION_STATES.findIndex((state) => state.value === value);
+
+const getColorReactionState = (value: number): (typeof COLOR_REACTION_STATES)[number] =>
+  COLOR_REACTION_STATES[getColorReactionStateIndex(value)] ?? COLOR_REACTION_STATES[1];
+
+const getNextColorReactionState = (
+  value: number
+): (typeof COLOR_REACTION_STATES)[number] => {
+  const index = getColorReactionStateIndex(value);
+  return COLOR_REACTION_STATES[
+    ((index < 0 ? 1 : index) + 1) % COLOR_REACTION_STATES.length
+  ];
+};
+
+export class ColorReactionMatrixControl {
+  private readonly buttons = new Map<
+    ColorReactionKey,
+    {
+      element: HTMLButtonElement;
+      sourceColorIndex: number;
+      targetColorIndex: number;
+    }
+  >();
+  private readonly swatches: Array<{
+    colorIndex: number;
+    element: HTMLElement;
+  }> = [];
+
+  public constructor(private readonly onRuntimeChange: () => void) {}
+
+  public addTo(container: PaneContainer): void {
+    const folder = container.addFolder({
+      title: 'Color Behavior',
+      expanded: true,
+    });
+
+    const matrix = document.createElement('div');
+    matrix.className = 'color-reaction-matrix';
+
+    matrix.appendChild(this.createCorner());
+    colorReactionRows.forEach((row) => {
+      matrix.appendChild(this.createHeader(row.colorIndex, row.label));
+    });
+
+    colorReactionRows.forEach((row) => {
+      matrix.appendChild(this.createHeader(row.colorIndex, row.label));
+      row.keys.forEach((key, columnIndex) => {
+        matrix.appendChild(this.createCell(key, row.colorIndex, columnIndex));
+      });
+    });
+
+    const matrixBlade = folder.addBlade({ view: 'separator' });
+    matrixBlade.element.classList.add('color-reaction-matrix-blade');
+    matrixBlade.element.replaceChildren(matrix);
+    this.sync();
+  }
+
+  public sync(): void {
+    this.buttons.forEach(({ element, sourceColorIndex, targetColorIndex }, key) => {
+      this.syncButton(element, key, sourceColorIndex, targetColorIndex);
+    });
+
+    this.swatches.forEach(({ colorIndex, element }) => {
+      element.style.backgroundColor = rgbColorToCss(activeVibe.colors[colorIndex]);
+    });
+  }
+
+  private createCorner(): HTMLDivElement {
+    const corner = document.createElement('div');
+    corner.className = 'color-reaction-matrix__corner';
+    return corner;
+  }
+
+  private createHeader(colorIndex: number, label: string): HTMLDivElement {
+    const header = document.createElement('div');
+    header.className = 'color-reaction-matrix__header';
+    header.setAttribute('aria-label', label);
+    header.title = label;
+
+    const swatch = document.createElement('span');
+    swatch.className = 'color-reaction-matrix__swatch';
+    this.swatches.push({ colorIndex, element: swatch });
+    header.appendChild(swatch);
+
+    return header;
+  }
+
+  private createCell(
+    key: ColorReactionKey,
+    sourceColorIndex: number,
+    targetColorIndex: number
+  ): HTMLDivElement {
+    const cell = document.createElement('div');
+    cell.className = 'color-reaction-matrix__cell';
+
+    const config = appConfig.runtimeSettings.controls[key];
+    if (!config) {
+      return cell;
+    }
+
+    const button = document.createElement('button');
+    button.className = 'color-reaction-matrix__button';
+    button.type = 'button';
+
+    const icon = document.createElement('span');
+    icon.className = 'color-reaction-matrix__icon';
+    button.appendChild(icon);
+
+    button.addEventListener('click', () => {
+      const currentValue = normalizeNumberControlValue(settings[key], config);
+      const nextState = getNextColorReactionState(currentValue);
+      settings[key] = nextState.value;
+      this.syncButton(button, key, sourceColorIndex, targetColorIndex);
+      this.onRuntimeChange();
+    });
+
+    this.buttons.set(key, {
+      element: button,
+      sourceColorIndex,
+      targetColorIndex,
+    });
+    cell.appendChild(button);
+
+    return cell;
+  }
+
+  private syncButton(
+    button: HTMLButtonElement,
+    key: ColorReactionKey,
+    sourceColorIndex: number,
+    targetColorIndex: number
+  ): void {
+    const config = appConfig.runtimeSettings.controls[key];
+    if (!config) {
+      return;
+    }
+
+    settings[key] = normalizeNumberControlValue(settings[key], config);
+
+    const state = getColorReactionState(settings[key]);
+    const nextState = getNextColorReactionState(settings[key]);
+    const sourceLabel = COLOR_REACTION_LABELS[sourceColorIndex];
+    const targetLabel = COLOR_REACTION_LABELS[targetColorIndex];
+
+    button.dataset.reaction = state.id;
+    button.setAttribute(
+      'aria-label',
+      `${sourceLabel} ${state.label.toLowerCase()} ${targetLabel.toLowerCase()} trails; click to switch to ${nextState.label.toLowerCase()}`
+    );
+    button.title = `${sourceLabel}: ${state.label} ${targetLabel} trails`;
+  }
+}
diff --git a/src/page/config-pane.ts b/src/page/config-pane.ts
index 3e6c397..8bb7f28 100644
--- a/src/page/config-pane.ts
+++ b/src/page/config-pane.ts
@@ -81,6 +81,16 @@ const getNumberBindingParams = (config: NumberControlConfig): BindingParams => {
   return params;
 };
 
+const getInvertedNumberControlValue = (
+  value: number,
+  config: NumberControlConfig
+): number => {
+  if (!config.inverted || config.min === undefined || config.max === undefined) {
+    return value;
+  }
+  return config.min + config.max - value;
+};
+
 export class ConfigPane {
   private readonly container: HTMLDivElement;
   private readonly closeButton: HTMLButtonElement;
@@ -264,9 +274,10 @@ export class ConfigPane {
     }
 
     settings[key] = normalizeNumberControlValue(settings[key], config);
+    const bindingTarget = this.getRuntimeBindingTarget(key, config);
 
     container
-      .addBinding(settings, key, getNumberBindingParams(config))
+      .addBinding(bindingTarget, key, getNumberBindingParams(config))
       .on('change', () => {
         const nextValue = normalizeNumberControlValue(settings[key], config);
         if (nextValue !== settings[key]) {
@@ -277,6 +288,25 @@ export class ConfigPane {
       });
   }
 
+  private getRuntimeBindingTarget(
+    key: RuntimeControlKey,
+    config: NumberControlConfig
+  ): typeof settings | Record<RuntimeControlKey, number> {
+    if (!config.inverted) {
+      return settings;
+    }
+
+    const bindingTarget = {} as Record<RuntimeControlKey, number>;
+    Object.defineProperty(bindingTarget, key, {
+      enumerable: true,
+      get: () => getInvertedNumberControlValue(settings[key], config),
+      set: (value: number) => {
+        settings[key] = getInvertedNumberControlValue(value, config);
+      },
+    });
+    return bindingTarget;
+  }
+
   private getRuntimeControlConfig(
     key: RuntimeControlKey
   ): NumberControlConfig | undefined {
diff --git a/src/page/eraser-size-control.test.ts b/src/page/eraser-size-control.test.ts
new file mode 100644
index 0000000..6b2bbe8
--- /dev/null
+++ b/src/page/eraser-size-control.test.ts
@@ -0,0 +1,26 @@
+import { describe, expect, it } from 'vitest';
+
+import { appConfig } from '../config';
+import {
+  getEraserSizeFromSliderRatio,
+  getEraserSliderRatioFromSize,
+} from './eraser-size-control';
+
+describe('eraser size slider mapping', () => {
+  it('maps slider position quadratically to eraser size', () => {
+    const { max, min } = appConfig.toolbar.eraser;
+
+    expect(getEraserSizeFromSliderRatio(0)).toBe(min);
+    expect(getEraserSizeFromSliderRatio(0.5)).toBe(min + (max - min) * 0.25);
+    expect(getEraserSizeFromSliderRatio(1)).toBe(max);
+  });
+
+  it('maps eraser size back to the inverse slider position', () => {
+    const { max, min } = appConfig.toolbar.eraser;
+    const quarterRangeSize = min + (max - min) * 0.25;
+
+    expect(getEraserSliderRatioFromSize(min)).toBe(0);
+    expect(getEraserSliderRatioFromSize(quarterRangeSize)).toBe(0.5);
+    expect(getEraserSliderRatioFromSize(max)).toBe(1);
+  });
+});
diff --git a/src/page/eraser-size-control.ts b/src/page/eraser-size-control.ts
index 1099821..2c0e8a8 100644
--- a/src/page/eraser-size-control.ts
+++ b/src/page/eraser-size-control.ts
@@ -9,11 +9,28 @@ const clampEraserSize = (value: number): number => {
   return Math.min(max, Math.max(min, Math.round(safeValue)));
 };
 
+const ERASER_SLIDER_MIN = 0;
+const ERASER_SLIDER_MAX = 1;
+const ERASER_SLIDER_STEP = 0.001;
+
+const clampSliderRatio = (value: number): number => {
+  const safeValue = Number.isFinite(value) ? value : ERASER_SLIDER_MIN;
+  return Math.min(ERASER_SLIDER_MAX, Math.max(ERASER_SLIDER_MIN, safeValue));
+};
+
 const getEraserSizeRatio = (size: number): number => {
   const { max, min } = appConfig.toolbar.eraser;
-  return (size - min) / (max - min);
+  return (clampEraserSize(size) - min) / (max - min);
 };
 
+export const getEraserSizeFromSliderRatio = (sliderRatio: number): number => {
+  const { max, min } = appConfig.toolbar.eraser;
+  return clampEraserSize(min + (max - min) * clampSliderRatio(sliderRatio) ** 2);
+};
+
+export const getEraserSliderRatioFromSize = (size: number): number =>
+  Math.sqrt(getEraserSizeRatio(size));
+
 interface EraserSizeControlOptions {
   getGame: () => GameLoop | null;
   onActivate: () => void;
@@ -33,7 +50,7 @@ export class EraserSizeControl {
     this.control.addEventListener('click', this.activate);
     this.slider.addEventListener('focus', this.activate);
     this.slider.addEventListener('input', () => {
-      settings.eraserSize = clampEraserSize(Number(this.slider.value));
+      settings.eraserSize = getEraserSizeFromSliderRatio(Number(this.slider.value));
       this.activate();
       this.render();
       this.options.onChange();
@@ -46,19 +63,20 @@ export class EraserSizeControl {
       settings.eraserSize = size;
     }
 
-    this.slider.min = appConfig.toolbar.eraser.min.toString();
-    this.slider.max = appConfig.toolbar.eraser.max.toString();
-    this.slider.step = appConfig.toolbar.eraser.step.toString();
-    this.slider.value = size.toString();
+    const sliderRatio = getEraserSliderRatioFromSize(size);
+    this.slider.min = ERASER_SLIDER_MIN.toString();
+    this.slider.max = ERASER_SLIDER_MAX.toString();
+    this.slider.step = ERASER_SLIDER_STEP.toString();
+    this.slider.value = sliderRatio.toString();
     this.slider.setAttribute('aria-valuetext', `${size}px`);
 
-    const ratio = getEraserSizeRatio(size);
+    const sizeRatio = getEraserSizeRatio(size);
     const scale =
       appConfig.toolbar.eraser.controlScaleMin +
       (appConfig.toolbar.eraser.controlScaleMax -
         appConfig.toolbar.eraser.controlScaleMin) *
-        ratio;
-    this.control.style.setProperty('--eraser-progress', `${ratio * 100}%`);
+        sizeRatio;
+    this.control.style.setProperty('--eraser-progress', `${sliderRatio * 100}%`);
     this.control.style.setProperty('--eraser-control-scale', scale.toFixed(3));
     this.syncActiveState();
     this.options.getGame()?.updateEraserPreview();
diff --git a/src/style/_app-shell.scss b/src/style/_app-shell.scss
index abf8824..f32be5d 100644
--- a/src/style/_app-shell.scss
+++ b/src/style/_app-shell.scss
@@ -121,12 +121,15 @@ html > body {
       position: absolute;
       top: 0;
       left: 0;
+      max-width: calc(100% - var(--normal-margin) * 2);
       margin: var(--normal-margin);
       z-index: 5;
 
       pre {
         font-size: 20px;
         color: red;
+        white-space: pre-wrap;
+        overflow-wrap: anywhere;
       }
     }
   }
diff --git a/src/style/_config-pane.scss b/src/style/_config-pane.scss
index ad5402f..ad7ae31 100644
--- a/src/style/_config-pane.scss
+++ b/src/style/_config-pane.scss
@@ -142,6 +142,7 @@
     --tp-blade-value-width: min(210px, 62%);
     --tp-container-unit-size: 18px;
 
+    padding-bottom: 10px;
     font-size: 11px;
 
     // Tweakpane v4 internal class — re-verify on upgrade.
diff --git a/src/utils/graphics/initialize-gpu.test.ts b/src/utils/graphics/initialize-gpu.test.ts
new file mode 100644
index 0000000..44bbd91
--- /dev/null
+++ b/src/utils/graphics/initialize-gpu.test.ts
@@ -0,0 +1,100 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { initializeGpu } from './initialize-gpu';
+
+const limits = {
+  maxBufferSize: 1024,
+  maxComputeWorkgroupsPerDimension: 16,
+  maxStorageBufferBindingSize: 1024,
+} as unknown as GPUSupportedLimits;
+
+const createDevice = (): GPUDevice =>
+  ({
+    addEventListener: vi.fn(),
+    lost: new Promise(() => undefined),
+  }) as unknown as GPUDevice;
+
+const createAdapter = (features: Array<GPUFeatureName> = []): GPUAdapter => {
+  const device = createDevice();
+  return {
+    features: new Set(features),
+    info: {},
+    limits,
+    requestDevice: vi.fn().mockResolvedValue(device),
+  } as unknown as GPUAdapter;
+};
+
+const stubSecureWebGpu = (requestAdapter: GPU['requestAdapter']): void => {
+  vi.stubGlobal('window', { isSecureContext: true });
+  vi.stubGlobal('navigator', {
+    gpu: {
+      requestAdapter,
+    },
+  });
+};
+
+describe('initializeGpu', () => {
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it('starts with the least demanding compatibility adapter request', async () => {
+    const adapter = createAdapter();
+    const requestAdapter = vi.fn().mockResolvedValue(adapter);
+    stubSecureWebGpu(requestAdapter as GPU['requestAdapter']);
+
+    await initializeGpu();
+
+    expect(requestAdapter).toHaveBeenNthCalledWith(1, {
+      featureLevel: 'compatibility',
+    });
+    expect(requestAdapter).toHaveBeenCalledTimes(1);
+    expect(adapter.requestDevice).toHaveBeenCalled();
+  });
+
+  it('continues trying adapters if one request throws', async () => {
+    const adapter = createAdapter();
+    const requestAdapter = vi
+      .fn()
+      .mockRejectedValueOnce(new Error('adapter request failed'))
+      .mockResolvedValueOnce(adapter);
+    stubSecureWebGpu(requestAdapter as GPU['requestAdapter']);
+
+    await expect(initializeGpu()).resolves.toBeDefined();
+    expect(requestAdapter).toHaveBeenCalledTimes(2);
+  });
+
+  it('falls back through core and high-performance adapter requests', async () => {
+    const adapter = createAdapter();
+    const requestAdapter = vi
+      .fn()
+      .mockResolvedValueOnce(null)
+      .mockResolvedValueOnce(null)
+      .mockResolvedValueOnce(adapter);
+    stubSecureWebGpu(requestAdapter as GPU['requestAdapter']);
+
+    await initializeGpu();
+
+    expect(requestAdapter).toHaveBeenNthCalledWith(1, {
+      featureLevel: 'compatibility',
+    });
+    expect(requestAdapter).toHaveBeenNthCalledWith(2, undefined);
+    expect(requestAdapter).toHaveBeenNthCalledWith(3, {
+      featureLevel: 'compatibility',
+      powerPreference: 'high-performance',
+    });
+    expect(adapter.requestDevice).toHaveBeenCalled();
+  });
+
+  it('requests only the core feature when the adapter exposes optional features', async () => {
+    const adapter = createAdapter(['core-features-and-limits', 'timestamp-query']);
+    const requestAdapter = vi.fn().mockResolvedValue(adapter);
+    stubSecureWebGpu(requestAdapter as GPU['requestAdapter']);
+
+    await initializeGpu();
+
+    expect(adapter.requestDevice).toHaveBeenCalledWith({
+      requiredFeatures: ['core-features-and-limits'],
+    });
+  });
+});
diff --git a/src/utils/graphics/initialize-gpu.ts b/src/utils/graphics/initialize-gpu.ts
index 9108060..1fdc9bf 100644
--- a/src/utils/graphics/initialize-gpu.ts
+++ b/src/utils/graphics/initialize-gpu.ts
@@ -15,7 +15,30 @@ const REQUESTED_LIMIT_NAMES = [
   'maxComputeWorkgroupsPerDimension',
 ] as const satisfies ReadonlyArray<keyof GPUSupportedLimits>;
 
-const getRequiredLimits = (
+interface AdapterRequestAttempt {
+  label: string;
+  options?: GPURequestAdapterOptions;
+}
+
+const ADAPTER_REQUEST_ATTEMPTS: ReadonlyArray<AdapterRequestAttempt> = [
+  {
+    label: 'compatibility-default',
+    options: { featureLevel: 'compatibility' },
+  },
+  {
+    label: 'core-default',
+  },
+  {
+    label: 'compatibility-high-performance',
+    options: { featureLevel: 'compatibility', powerPreference: 'high-performance' },
+  },
+  {
+    label: 'core-high-performance',
+    options: { powerPreference: 'high-performance' },
+  },
+] as const;
+
+const getRelevantLimits = (
   limits: GPUSupportedLimits
 ): Record<(typeof REQUESTED_LIMIT_NAMES)[number], number> =>
   Object.fromEntries(REQUESTED_LIMIT_NAMES.map((name) => [name, limits[name]])) as Record<
@@ -42,25 +65,64 @@ const getAdapterInfo = (adapter: GPUAdapter): Record<string, unknown> => {
   }
 };
 
-const requestAdapter = async (
-  gpu: GPU,
-  options?: GPURequestAdapterOptions
-): Promise<GPUAdapter | null> => {
-  try {
-    return await gpu.requestAdapter(options);
-  } catch (error) {
-    throw new RuntimeError(
-      ErrorCode.WEBGPU_ADAPTER_UNAVAILABLE,
-      'Could not request a WebGPU adapter.',
-      {
-        cause: error,
-        details: {
-          causeMessage: getErrorMessage(error),
-          powerPreference: options?.powerPreference ?? 'default',
-        },
-      }
-    );
+const getRequiredFeatures = (adapter: GPUAdapter): Array<GPUFeatureName> => {
+  const requiredFeatures: Array<GPUFeatureName> = [];
+
+  if (adapter.features.has('core-features-and-limits')) {
+    requiredFeatures.push('core-features-and-limits');
   }
+
+  return requiredFeatures;
+};
+
+type AdapterRequestOutcome = 'adapter' | 'unavailable' | 'error';
+
+const describeAdapterRequest = (
+  attempt: AdapterRequestAttempt,
+  outcome: AdapterRequestOutcome,
+  causeMessage?: string
+): Record<string, unknown> => ({
+  label: attempt.label,
+  featureLevel: attempt.options?.featureLevel ?? 'core',
+  powerPreference: attempt.options?.powerPreference ?? 'default',
+  outcome,
+  ...(causeMessage === undefined ? {} : { causeMessage }),
+});
+
+const requestAdapter = async (
+  gpu: GPU
+): Promise<{
+  adapter: GPUAdapter | null;
+  attempts: Array<Record<string, unknown>>;
+}> => {
+  const attempts: Array<Record<string, unknown>> = [];
+
+  for (const attempt of ADAPTER_REQUEST_ATTEMPTS) {
+    try {
+      const adapter = await gpu.requestAdapter(attempt.options);
+      attempts.push(describeAdapterRequest(attempt, adapter ? 'adapter' : 'unavailable'));
+
+      if (adapter) {
+        return { adapter, attempts };
+      }
+    } catch (error) {
+      attempts.push(describeAdapterRequest(attempt, 'error', getErrorMessage(error)));
+    }
+  }
+
+  return { adapter: null, attempts };
+};
+
+const formatAdapterAttemptSummary = (
+  attempts: Array<Record<string, unknown>>
+): string => {
+  if (attempts.length === 0) {
+    return 'No adapter requests were attempted.';
+  }
+
+  return `Adapter attempts: ${attempts
+    .map((attempt) => `${attempt.label}: ${attempt.outcome}`)
+    .join('; ')}`;
 };
 
 export const initializeGpu = async (): Promise<GPUDevice> => {
@@ -81,35 +143,43 @@ export const initializeGpu = async (): Promise<GPUDevice> => {
     });
   }
 
-  const adapter =
-    (await requestAdapter(gpu, {
-      powerPreference: 'high-performance',
-    })) ?? (await requestAdapter(gpu));
+  const { adapter, attempts } = await requestAdapter(gpu);
+  ErrorHandler.addMetadata('webgpuAdapterRequest', {
+    attempts,
+    selectedAttempt: attempts[attempts.length - 1]?.label ?? null,
+  });
 
   if (!adapter) {
     throw new RuntimeError(
       ErrorCode.WEBGPU_ADAPTER_UNAVAILABLE,
-      'WebGPU is available, but this browser could not provide a compatible GPU adapter.'
+      [
+        'WebGPU is available, but this browser could not provide a compatible GPU adapter.',
+        formatAdapterAttemptSummary(attempts),
+      ].join('\n'),
+      {
+        details: {
+          attempts,
+          hasNavigatorGpu: true,
+          isSecureContext: window.isSecureContext,
+          platform: navigator.platform,
+          userAgent: navigator.userAgent,
+        },
+      }
     );
   }
 
-  const requiredLimits = getRequiredLimits(adapter.limits);
-  const requiredFeatures: Array<GPUFeatureName> = [];
-  if (adapter.features.has('timestamp-query')) {
-    requiredFeatures.push('timestamp-query');
-  }
+  const requiredFeatures = getRequiredFeatures(adapter);
   ErrorHandler.addMetadata('webgpuAdapter', {
     features: Array.from(adapter.features).sort(),
     info: getAdapterInfo(adapter),
     requiredFeatures,
-    requiredLimits,
+    relevantLimits: getRelevantLimits(adapter.limits),
   });
 
   let gpuDevice: GPUDevice;
   try {
     gpuDevice = await adapter.requestDevice({
       requiredFeatures,
-      requiredLimits,
     });
   } catch (error) {
     throw new RuntimeError(
@@ -120,7 +190,6 @@ export const initializeGpu = async (): Promise<GPUDevice> => {
         details: {
           causeMessage: getErrorMessage(error),
           requiredFeatures,
-          requiredLimits,
         },
       }
     );
diff --git a/src/vibe-registry.ts b/src/vibe-registry.ts
new file mode 100644
index 0000000..0b0ae54
--- /dev/null
+++ b/src/vibe-registry.ts
@@ -0,0 +1,7 @@
+import { appConfig } from './config';
+import type { VibeId, VibePreset } from './config/types';
+
+export const VIBE_PRESETS: Array<VibePreset> = appConfig.vibes.presets;
+
+export const getVibeById = (vibeId: VibeId): VibePreset | undefined =>
+  VIBE_PRESETS.find((vibe) => vibe.id === vibeId);
diff --git a/src/vibe-uri.test.ts b/src/vibe-uri.test.ts
index fe55d5e..72c04f2 100644
--- a/src/vibe-uri.test.ts
+++ b/src/vibe-uri.test.ts
@@ -11,9 +11,9 @@ describe('vibe URI handling', () => {
     expect(getVibeIdFromUri('https://example.test/?vibe=Aurora%20Mycelium')).toBe(
       VibeId.AuroraMycelium
     );
-    expect(getVibeIdFromUri('https://example.test/?vibe=Velvet%20Observatory%20Copy')).toBe(
-      VibeId.VelvetObservatory
-    );
+    expect(
+      getVibeIdFromUri('https://example.test/?vibe=Velvet%20Observatory%20Copy')
+    ).toBe(VibeId.VelvetObservatory);
   });
 
   it('uses query values before path or hash fallbacks', () => {