rust-toolchain.toml

# Single source of truth for the Rust toolchain, local and CI.
# - Every in-repo cargo/rustc run resolves this file (rustup precedence:
#   RUSTUP_TOOLCHAIN env > directory override > this file > rustup default),
#   so local clippy/rustfmt finally match CI's.
# - CI workflows install Rust through
#   .github/actions/setup-rust, whose `toolchain` input defaults to the same
#   version as `channel` below (kept in sync by
#   scripts/ci/ws12_workflow_contracts.py); a lane that intentionally runs a
#   different toolchain (the two nightly-2025-11-01 coverage lanes) passes
#   an explicit `toolchain:` input, and the composite exports
#   RUSTUP_TOOLCHAIN naming exactly what it installed either way, so this
#   file can never silently override a job's chosen toolchain.
# - The cargo-dist release workflow is covered through
#   .github/dist-build-setup.yml, which cargo-dist re-includes on every
#   regeneration, so no lane installs Rust outside the composite.
# - Bumping: change `channel` here AND the `toolchain` input default in
#   .github/actions/setup-rust/action.yml in the same PR (the ws12 gate
#   fails on any mismatch). Expect Swatinem/rust-cache keys to rotate with
#   the compiler version.
# - Docker builds are unaffected: the Dockerfile COPYs an explicit path list
#   that excludes this file and stays on its base-image toolchain.
[toolchain]
channel = "1.98.0"
components = ["clippy", "rustfmt"]