Stitch

Markup AI Launches Content Guardian Agents

Markup AI announced Content Guardian Agents, a suite of AI-powered quality agents for marketing teams to evaluate brand voice, audience fit, accuracy, human voice and "AI citability" in content. The product is built on Markup AI’s existing rules engine used by more than 100 global brands and is available today via a Google Docs browser extension, with enterprise access via native API and MCP server integration. Native integrations with Adobe, Contentful, Figma, Heretto and Microsoft Word 365 are in development. The announcement cites Bessemer Venture Partners research showing broad AI adoption among marketing leaders but limited trust and quality concerns, and includes customer endorsements from Stitch and Avalara representatives.

7 Things Vibe Design Can't Replicate

This analysis by Arin Bhowmick (Chief Design Officer, SAP) examines limitations of “vibe design” — AI-driven tools that generate high-fidelity UI directions from brief prompts. The piece traces the term “vibe coding” to Andrej Karpathy and notes Google’s Stitch and tools like Figma Make, Lovable, Cursor and Vercel have popularized rapid, model-driven design. Bhowmick argues there are seven irreplaceable human contributions: taste and judgment; distinctive brand voice/microcopy; maintaining coherent design systems; user research and talking to real users; the practicing designer’s discipline; reasoning and documentation (termed “comprehension debt” by Addy Osmani); and apprenticeship for junior designers. The author acknowledges AI’s productivity gains but urges deliberate use that preserves human accountability, systems thinking, and learning paths for designers.

Lovable launches mobile app for on-the-go building

Lovable released a mobile version of its AI-powered "vibe coding" app for iOS and Android on April 28, 2026. The app lets users create websites and web apps via voice or text prompts, with an agent that can run autonomously and cross-device continuity between phone and computer. The launch follows recent App Store scrutiny of vibe-coding tools; Apple recently blocked updates to some competitors and has restricted apps from downloading or executing new code inside a host app, pushing generated app previews to web browsers. Lovable’s mobile app promotes compliance by focusing on creating working websites/web apps and delivering build notifications for review. The article adds context about the App Store policy actions affecting Replit, Vibecode and the app Anything, and positions Lovable among AI-assisted app and design tools.