Rust

feat: Rust rewrite foundation — ADR-0003, Phase 0 scaffold, plan #13

	name: Rust

	on:
	push:
	branches:
	- main
	paths:
	- 'crates/**'
	- 'Cargo.toml'
	- 'Cargo.lock'
	- 'rust-toolchain.toml'
	- 'rustfmt.toml'
	- '.github/workflows/rust.yml'
	pull_request:
	paths:
	- 'crates/**'
	- 'Cargo.toml'
	- 'Cargo.lock'
	- 'rust-toolchain.toml'
	- 'rustfmt.toml'
	- '.github/workflows/rust.yml'

	permissions:
	contents: read

	concurrency:
	group: rust-${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: ${{ github.event_name == 'pull_request' }}

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1

	# The toolchain (and rustfmt/clippy components) is selected by
	# rust-toolchain.toml via the runner's preinstalled rustup — no
	# third-party action needed.
	- name: Format check
	run: cargo fmt --all -- --check

	- name: Clippy
	run: cargo clippy --all-targets --all-features -- -D warnings

	- name: Test
	run: cargo test --all-features --workspace

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