Protocol Design

The numbers tell the story: in November 2024, Model Context Protocol server downloads hovered around 100,000. By April 2025, that figure exploded to over 8 million. By early 2026, researchers documented 3,238 MCP-related GitHub repositories, while the broader AI ecosystem saw 4.3 million AI-related repositories—a 178% year-over-year jump. MCP didn’t just grow; it became infrastructure. What started as Anthropic’s solution to a specific problem—how to connect Claude to external data sources without building custom integrations for every system—has evolved into something far more significant. MCP is now the de facto standard for AI-tool integration, the “USB-C for AI” that the industry didn’t know it needed until it arrived. ...

Every day, millions of developers type ssh user@server without a second thought. The connection establishes, the shell appears, and work begins. But beneath that familiar prompt lies one of the most elegant cryptographic protocols ever designed—a multi-layered system that somehow manages to be both simple enough for daily use and sophisticated enough to withstand decades of scrutiny. The irony is striking: most people assume SSH “just uses public key cryptography.” After all, that’s what the ~/.ssh/id_rsa file is for, right? The reality is far more nuanced. SSH uses public keys for exactly one purpose—authentication—and a completely different mechanism for everything else. Understanding this distinction reveals why SSH has remained the gold standard for remote access since 1995. ...