Check links with lychee #25

	name: Check links with lychee

	on:
	pull_request:
	paths:
	- "profile/*/.md"
	- ".lycheeignore"
	- ".github/workflows/link-check.yml"

	push:
	paths:
	- "profile/*/.md"
	- ".lycheeignore"
	- ".github/workflows/link-check.yml"

	schedule:
	- cron: "0 20 * * 0" # Sundays 20:00 UTC

	workflow_dispatch:

	concurrency:
	group: lychee-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	link-check:
	runs-on: ubuntu-latest
	permissions:
	contents: read

	steps:
	- uses: actions/checkout@v6

	# Using a progressive relaxation strategy that maximizes cache reuse without breaking correctness.
	- name: Restore lychee cache
	id: lychee-cache
	uses: actions/cache/restore@v5
	with:
	path: .lycheecache
	key: lychee-${{ runner.os }}-${{ github.ref_name }}-${{ hashFiles('.lycheeignore', 'profile/*/.md') }}
	restore-keys: \|
	lychee-${{ runner.os }}-${{ github.ref_name }}-
	lychee-${{ runner.os }}-

	- name: Check links in Markdown files
	uses: lycheeverse/lychee-action@v2
	with:
	token: ${{ secrets.GITHUB_TOKEN }}
	fail: true
	args: >
	--root-dir "$(pwd)"
	--no-progress
	--cache
	--max-cache-age 1d
	--accept 200,206,429
	--header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8"
	--user-agent "curl/8.4.0"
	--timeout 20
	--max-retries 2
	--max-redirects 2
	"profile/*/.md"

	- name: Save lychee cache
	if: always() && steps.lychee-cache.outputs.cache-hit != 'true'
	uses: actions/cache/save@v5
	with:
	path: .lycheecache
	key: lychee-${{ runner.os }}-${{ github.ref_name }}-${{ hashFiles('.lycheeignore', 'profile/*/.md') }}

Provide feedback