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