Rust (with clippy and rustfmt), just, Node (for deploys), Kani, Lean,
cargo-mutants, and cargo-fuzz, so `mise install` is the whole bootstrap
and nothing gets installed by hand. Lean is 4.34.1, the newest release
past mise's minimum release age; verify/lean/lean-toolchain matches.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GWVo7x3UHw5kwCUaWxiejX
