fix(meme-maker): stop inviting sharp installs in PNG error (#109612)

Co-authored-by: Peter Steinberger <steipete@gmail.com>

skills/meme-maker/SKILL.md

@@ -40,3 +40,4 @@ Hygiene
 - Do not ship template image files in the skill.
 - Do not use shared or hardcoded Imgflip credentials.
 - Keep Know Your Meme lookups out of the render hot path; use KYM links for explanation/provenance only.
+- If PNG output fails because `sharp` is missing, use `--out meme.svg` (or another `.svg` path). Do not `npm install` packages into the skill directory or the OpenClaw tree to enable PNG.

skills/meme-maker/scripts/meme.mjs

@@ -283,9 +283,9 @@ async function renderLocal(template, texts, flags) {
     try {
       sharp = (await import("sharp")).default;
     } catch {
-      throw new Error(
-        "PNG output needs the optional sharp package. Use --out meme.svg or install sharp near the skill runner.",
-      );
+      // Keep this message free of package-install advice: agents follow it
+      // literally and can corrupt pnpm-managed OpenClaw installs (see #109405).
+      throw new Error("PNG output needs the optional sharp package. Use --out meme.svg instead.");
     }
     await sharp(Buffer.from(svg)).png().toFile(out);
   } else {

test/scripts/meme-maker-png-error.test.ts

@@ -0,0 +1,20 @@
+import fs from "node:fs";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+
+const memeScriptPath = path.resolve(process.cwd(), "skills/meme-maker/scripts/meme.mjs");
+
+describe("meme-maker PNG missing-sharp error text", () => {
+  it("directs SVG output and never invites package installs near the skill runner", () => {
+    const source = fs.readFileSync(memeScriptPath, "utf8");
+
+    expect(source).toContain("PNG output needs the optional sharp package.");
+    expect(source).toContain("Use --out meme.svg instead.");
+
+    // Agents treat install hints literally and can corrupt pnpm workspaces.
+    expect(source).not.toMatch(/install\s+sharp/iu);
+    expect(source).not.toMatch(/npm\s+install/iu);
+    expect(source).not.toMatch(/near the skill runner/iu);
+    expect(source).not.toMatch(/install\s+.*\s+near/iu);
+  });
+});