Eight parallel jobs on push/PR:
- test × 3 (default / no-default / all-features) via nextest + doc
- clippy × 3 feature permutations, -D warnings
- fmt
- doc (all-features, -D warnings on rustdoc)
- deny (cargo-deny action)
- miri (nightly, lib + vectors under default + no-default)
- fuzz (nightly, 60 s smoke on every target)
- mutants × 2 feature configs (same equivalence exclusions as local)
Swatinem/rust-cache on every cargo job; taiki-e/install-action for
nextest / cargo-fuzz / cargo-mutants. Uploads mutants.out on failure.
Drops test-fuzz-long from the justfile — 60 s per target in CI every
push plus the local proptest 1M-case suite already covers this.
