This issue of TLDR Dev brings you an AI context webinar, tutorials on storing HTML in favicons and adding JSON-LD to personal sites, plus deep dives on agentic AI, new developer tools (Recall, Loupe), and simplified AI agent deployments with temporary Cloudflare accounts. It also covers software buy-vs-build economics, ClickHouse’s decade of growth, common CORS pitfalls, startup funding news, and tips for getting work approved without explicit yes.

• AI tools now power 60% of engineering work but only 20% run unsupervised, exposing a gap that a dedicated context layer (not just more MCP memory) aims to close
• You can hide full HTML markup inside a favicon by encoding bytes into RGB pixel values and decoding it back out with JavaScript
• Cloudflare's new Wrangler "--temporary" flag lets AI agents spin up deployments in minutes without manual account sign-up
• Zoom has been shown to bypass browser CORS protections by routing through localhost servers

This newsletter highlights Microsoft’s new MAI-Image-2.5 model and Apple’s upgraded Image Playground, then breaks down Lovable’s self-reported growth metrics. It also links to design essays on embracing human flaws, writing decisions before mockups, and moving from rigid design systems to product context, plus a roundup of tools and case studies.

• Microsoft's MAI-Image-2.5 jumped to No. 2 on Arena's image-editing leaderboard, beating GPT-Image-1.5 and Nano Banana Pro 2K, and now powers edits in PowerPoint and OneDrive
• Apple's upgraded Image Playground (iOS/iPadOS/macOS 27) uses Private Cloud Compute for photorealistic images and embeds hidden SynthID watermarks to flag AI origin
• Lovable self-reports $500M ARR with only 146 employees, 60M+ projects, and 720M monthly visits—all unaudited figures, raising open questions about enterprise support and production scalability
• Design thinking essays argue for embracing AI-made imperfections as a feature, writing decisions in text before building mockups, and replacing static design systems with full product context for AI