diff --git a/scripts/bundle-a2ui.sh b/scripts/bundle-a2ui.sh
index 682cacd11da..0f313914ffd 100755
--- a/scripts/bundle-a2ui.sh
+++ b/scripts/bundle-a2ui.sh
@@ -14,12 +14,16 @@ A2UI_RENDERER_DIR="$ROOT_DIR/vendor/a2ui/renderers/lit"
 A2UI_APP_DIR="$ROOT_DIR/apps/shared/OpenClawKit/Tools/CanvasA2UI"
 
 # Docker builds exclude vendor/apps via .dockerignore.
-# In that environment we can keep a prebuilt bundle only if it exists.
+# Sparse local builds can also omit these inputs intentionally.
 if [[ ! -d "$A2UI_RENDERER_DIR" || ! -d "$A2UI_APP_DIR" ]]; then
   if [[ -f "$OUTPUT_FILE" ]]; then
     echo "A2UI sources missing; keeping prebuilt bundle."
     exit 0
   fi
+  if [[ -n "${OPENCLAW_SPARSE_PROFILE:-}" || "${OPENCLAW_A2UI_SKIP_MISSING:-}" == "1" ]]; then
+    echo "A2UI sources missing; skipping bundle because OPENCLAW_A2UI_SKIP_MISSING=1 or OPENCLAW_SPARSE_PROFILE is set." >&2
+    exit 0
+  fi
   echo "A2UI sources missing and no prebuilt bundle found at: $OUTPUT_FILE" >&2
   exit 1
 fi
diff --git a/scripts/canvas-a2ui-copy.ts b/scripts/canvas-a2ui-copy.ts
index 238bc3b912d..3d20df3dd31 100644
--- a/scripts/canvas-a2ui-copy.ts
+++ b/scripts/canvas-a2ui-copy.ts
@@ -10,15 +10,21 @@ export function getA2uiPaths(env = process.env) {
   return { srcDir, outDir };
 }
 
+export function shouldSkipMissingA2uiAssets(env = process.env): boolean {
+  return env.OPENCLAW_A2UI_SKIP_MISSING === "1" || Boolean(env.OPENCLAW_SPARSE_PROFILE);
+}
+
 export async function copyA2uiAssets({ srcDir, outDir }: { srcDir: string; outDir: string }) {
-  const skipMissing = process.env.OPENCLAW_A2UI_SKIP_MISSING === "1";
+  const skipMissing = shouldSkipMissingA2uiAssets(process.env);
   try {
     await fs.stat(path.join(srcDir, "index.html"));
     await fs.stat(path.join(srcDir, "a2ui.bundle.js"));
   } catch (err) {
     const message = 'Missing A2UI bundle assets. Run "pnpm canvas:a2ui:bundle" and retry.';
     if (skipMissing) {
-      console.warn(`${message} Skipping copy (OPENCLAW_A2UI_SKIP_MISSING=1).`);
+      console.warn(
+        `${message} Skipping copy because OPENCLAW_A2UI_SKIP_MISSING=1 or OPENCLAW_SPARSE_PROFILE is set.`,
+      );
       return;
     }
     throw new Error(message, { cause: err });
diff --git a/src/scripts/canvas-a2ui-copy.test.ts b/src/scripts/canvas-a2ui-copy.test.ts
index e3d19110655..4cf2732deff 100644
--- a/src/scripts/canvas-a2ui-copy.test.ts
+++ b/src/scripts/canvas-a2ui-copy.test.ts
@@ -1,10 +1,27 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it } from "vitest";
 import { copyA2uiAssets } from "../../scripts/canvas-a2ui-copy.js";
 
+const ORIGINAL_SKIP_MISSING = process.env.OPENCLAW_A2UI_SKIP_MISSING;
+const ORIGINAL_SPARSE_PROFILE = process.env.OPENCLAW_SPARSE_PROFILE;
+
 describe("canvas a2ui copy", () => {
+  afterEach(() => {
+    if (ORIGINAL_SKIP_MISSING === undefined) {
+      delete process.env.OPENCLAW_A2UI_SKIP_MISSING;
+    } else {
+      process.env.OPENCLAW_A2UI_SKIP_MISSING = ORIGINAL_SKIP_MISSING;
+    }
+
+    if (ORIGINAL_SPARSE_PROFILE === undefined) {
+      delete process.env.OPENCLAW_SPARSE_PROFILE;
+    } else {
+      process.env.OPENCLAW_SPARSE_PROFILE = ORIGINAL_SPARSE_PROFILE;
+    }
+  });
+
   async function withA2uiFixture(run: (dir: string) => Promise<void>) {
     const dir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-a2ui-"));
     try {
@@ -24,19 +41,19 @@ describe("canvas a2ui copy", () => {
 
   it("skips missing assets when OPENCLAW_A2UI_SKIP_MISSING=1", async () => {
     await withA2uiFixture(async (dir) => {
-      const previous = process.env.OPENCLAW_A2UI_SKIP_MISSING;
       process.env.OPENCLAW_A2UI_SKIP_MISSING = "1";
-      try {
-        await expect(
-          copyA2uiAssets({ srcDir: dir, outDir: path.join(dir, "out") }),
-        ).resolves.toBeUndefined();
-      } finally {
-        if (previous === undefined) {
-          delete process.env.OPENCLAW_A2UI_SKIP_MISSING;
-        } else {
-          process.env.OPENCLAW_A2UI_SKIP_MISSING = previous;
-        }
-      }
+      await expect(
+        copyA2uiAssets({ srcDir: dir, outDir: path.join(dir, "out") }),
+      ).resolves.toBeUndefined();
+    });
+  });
+
+  it("skips missing assets when OPENCLAW_SPARSE_PROFILE is set", async () => {
+    await withA2uiFixture(async (dir) => {
+      process.env.OPENCLAW_SPARSE_PROFILE = "core";
+      await expect(
+        copyA2uiAssets({ srcDir: dir, outDir: path.join(dir, "out") }),
+      ).resolves.toBeUndefined();
     });
   });