Tighten CI checks and add CLAUDE.md (#4) #16

	name: Elixir CI

	on:
	push:
	branches: [ "main" ]
	pull_request:
	branches: [ "main" ]

	permissions:
	contents: read

	jobs:
	build:

	name: Build and test
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Elixir
	uses: erlef/setup-beam@fc68ffb90438ef2936bbb3251622353b3dcb2f93 # v1.24.0
	with:
	elixir-version: '1.19.5'
	otp-version: '28'
	- name: Restore dependencies cache
	uses: actions/cache@v4
	with:
	path: deps
	key: ${{ runner.os }}-otp28-elixir1.19-mix-${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ runner.os }}-otp28-elixir1.19-mix-
	- name: Install dependencies
	run: mix deps.get
	- name: Check unused dependencies
	run: mix deps.unlock --check-unused
	- name: Check formatting
	run: mix format --check-formatted
	- name: Audit Hex dependencies
	run: mix hex.audit
	- name: Compile (warnings as errors)
	run: mix compile --warnings-as-errors
	- name: Build docs (warnings as errors)
	run: mix docs --warnings-as-errors
	- name: Run tests
	run: mix test

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