kyleandClaude Opus 5.5
d2e6cfa51f
The owner's hosts (titan, talos) run 1.98.1; nixos-26.05's Rust is 1.95.0, so builds and lints differed by host. The flake gains a second input, oxalica's rust-overlay (following our nixpkgs, so host configs can still follow theirs), and both the package build and the dev shell use its stable 1.98.1 with clippy and rustfmt. The workspace's rust-version rises to 1.98 to match; AGENTS.md, docs/dependencies.md and the M5c-1 plan follow. Checked on straylight: nix build gives all seven binaries; the dev shell has rustc, cargo and clippy 1.98.1, rustfmt 1.9.0, cargo-deny 0.19.6; make gate in it passes with 1122 tests, as on titan. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>