Align documentation consistency checks with current repository metada… #81

	name: Lean formal verification

	on:
	push:
	branches: [master, main]
	pull_request:
	workflow_dispatch:

	# Cancel in-progress runs for the same branch/PR when a newer commit arrives.
	concurrency:
	group: lean-${{ github.ref }}
	cancel-in-progress: true

	permissions:
	contents: read

	jobs:
	lean-build:
	name: lean-build
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install Elan (Lean toolchain manager)
	run: \|
	curl https://elan.lean-lang.org/elan-init.sh -sSf \| sh -s -- -y --no-modify-path
	echo "$HOME/.elan/bin" >> "$GITHUB_PATH"

	# Cache the downloaded Lean toolchain so repeat runs are faster.
	# The cache is keyed by the exact toolchain and manifest, so a version
	# bump automatically busts the cache.
	- name: Cache Lean toolchain
	uses: actions/cache@v4
	with:
	path: ~/.elan/toolchains
	key: lean-toolchain-${{ hashFiles('formal/lean-toolchain', 'formal/lake-manifest.json') }}
	restore-keys: lean-toolchain-

	- name: Build and verify Lean proofs
	working-directory: formal
	run: lake build

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