diff --git a/ve-project/src/themes/runtime/registry.ts b/ve-project/src/themes/runtime/registry.ts
index 8cc75427..71ba5d6b 100644
--- a/ve-project/src/themes/runtime/registry.ts
+++ b/ve-project/src/themes/runtime/registry.ts
@@ -23,6 +23,8 @@ import { bootstrapScrollspyRuntimeClasses } from '../bootstrap/ui/scrollspy/runt
 import { bootstrapSpinnerRuntimeClasses } from '../bootstrap/ui/spinners/runtime'
 import { bootstrapToastRuntimeClasses } from '../bootstrap/ui/toasts/runtime'
 import { bootstrapTooltipRuntimeClasses } from '../bootstrap/ui/tooltips/runtime'
+import { sketchyButtonRuntimeClasses } from '../sketchy/ui/buttons/runtime'
+import { sketchyGlobalRuntimeClasses } from '../sketchy/global/runtime'
 import type { VeThemeDefinition, VeThemeFamily } from './contracts'
 import { VE_DEFAULT_THEME_SLUG, isKnownThemeSlug, parseKnownThemeSlug } from './theme-slugs'
 
@@ -67,8 +69,14 @@ const bootstrapThemeDefinition = buildThemeDefinition('bootstrap', {
 		listGroup: bootstrapListGroupRuntimeClasses,
 }, ['ui'])
 
+const sketchyThemeDefinition = buildThemeDefinition('sketchy', {
+		global: sketchyGlobalRuntimeClasses,
+		buttons: sketchyButtonRuntimeClasses,
+})
+
 const implementedThemeRegistry: Record<string, VeThemeDefinition> = {
 	bootstrap: bootstrapThemeDefinition,
+	sketchy: sketchyThemeDefinition,
 }
 
 export type VeThemeResolutionReason = 'unknown-theme' | 'missing-family-contract'
diff --git a/ve-project/src/themes/sketchy/global/runtime.ts b/ve-project/src/themes/sketchy/global/runtime.ts
new file mode 100644
index 00000000..147f0877
--- /dev/null
+++ b/ve-project/src/themes/sketchy/global/runtime.ts
@@ -0,0 +1,11 @@
+import { bsTheme } from '../../bootstrap/_vars.css'
+import { body } from '../../bootstrap/body.css'
+import { containerFluid } from '../../bootstrap/container.css'
+
+// Temporary adapter: reuse Bootstrap global classes while Sketchy-specific
+// global styling tokens are implemented family-by-family.
+export const sketchyGlobalRuntimeClasses = {
+	bsTheme,
+	body,
+	containerFluid,
+} as const
diff --git a/ve-project/src/themes/sketchy/ui/buttons/runtime.ts b/ve-project/src/themes/sketchy/ui/buttons/runtime.ts
new file mode 100644
index 00000000..c6e62f87
--- /dev/null
+++ b/ve-project/src/themes/sketchy/ui/buttons/runtime.ts
@@ -0,0 +1,5 @@
+import { bootstrapButtonRuntimeClasses } from '../../../bootstrap/ui/buttons/runtime'
+
+// Temporary adapter: reuse migrated VE button classes while Sketchy-specific
+// button styling tokens are implemented family-by-family.
+export const sketchyButtonRuntimeClasses = bootstrapButtonRuntimeClasses