BUN

Stateless MCP: the 2026-07-28 spec drops sessions, so every request is one self-contained POST. What changed and a Bun + Hono pattern for many servers.

The Bun Rust rewrite six weeks on: 2,475 open bot PRs, no release tag and costs that may exceed $165K. The evidence, Jarred Sumner's reply and HN reactions.

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