BUN

MCP just dropped sessions entirely. Every request is now one self-contained POST. Here is what changed in the 2026-07-28 spec and a Bun + Hono pattern for hosting many MCP servers on a single process.

Tom Lockwood investigated the Bun Rust rewrite six weeks after it merged to main - 2,475 open PRs, no release tag, and costs that may far exceed the claimed $165K. We break down the evidence, Jarred Sumner's response, and what the HN community thinks.

/simplify, /batch, /debug, /fast, and other built-in skills.