Add CI for markdown and yaml (#1)

Reviewed-on: #1

.gitea/workflows/ci.yml

@@ -0,0 +1,97 @@
+---
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  skip-ci-check:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.check.outputs.skip }}
+    steps:
+      - name: Checkout (for commit message)
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Skip check (@skipci in branch name or commit message)
+        id: check
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          SKIP_PATTERN='@skipci'
+
+          # Branch name (works for push and PR on GitHub-compatible runners)
+          BRANCH_NAME="${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}"
+
+          # Commit message (best-effort; fall back to git)
+          COMMIT_MSG="${GITHUB_EVENT_HEAD_COMMIT_MESSAGE:-}"
+          if [ -z "${COMMIT_MSG}" ]; then
+            COMMIT_MSG="$(git log -1 --pretty=%B 2>/dev/null || true)"
+          fi
+
+          SKIP=0
+          if echo "${BRANCH_NAME}" | grep -qiF "${SKIP_PATTERN}"; then
+            echo "Skipping CI: branch name contains ${SKIP_PATTERN}"
+            SKIP=1
+          fi
+
+          if [ "${SKIP}" -eq 0 ] && [ -n "${COMMIT_MSG}" ]; then
+            if echo "${COMMIT_MSG}" | grep -qiF "${SKIP_PATTERN}"; then
+              echo "Skipping CI: commit message contains ${SKIP_PATTERN}"
+              SKIP=1
+            fi
+          fi
+
+          echo "skip=${SKIP}" >> "${GITHUB_OUTPUT}"
+          echo "Branch: ${BRANCH_NAME}"
+          echo "Skip CI: ${SKIP}"
+
+  markdown-lint:
+    needs: skip-ci-check
+    if: needs.skip-ci-check.outputs.should_skip != '1'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install markdownlint-cli2
+        shell: bash
+        run: |
+          set -euo pipefail
+          npm install -g markdownlint-cli2@0.14.0
+
+      - name: Lint markdown
+        shell: bash
+        run: |
+          set -euo pipefail
+          # Lint tracked markdown files only (avoid linting generated/vendor content)
+          git ls-files '*.md' | xargs -r markdownlint-cli2
+
+  yaml-validate:
+    needs: skip-ci-check
+    if: needs.skip-ci-check.outputs.should_skip != '1'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install yamllint
+        shell: bash
+        run: |
+          set -euo pipefail
+          python3 -m venv .venv
+          . .venv/bin/activate
+          pip install --no-cache-dir yamllint==1.35.1
+
+      - name: Lint YAML
+        shell: bash
+        run: |
+          set -euo pipefail
+          # Lint tracked YAML only (avoid .git and other noise)
+          . .venv/bin/activate
+          git ls-files '*.yml' '*.yaml' | xargs -r yamllint -d "{extends: default, rules: {document-start: disable, truthy: disable, line-length: disable}}"

.markdownlint-cli2.yaml

@@ -0,0 +1,4 @@
+---
+# Notes repo: long lines (IPs, commands, URLs) are common.
+config:
+  MD013: false

README.md

@@ -21,5 +21,3 @@ Personal notes for my homelab: build logs, configs, and operational runbooks for
 ## Status
 
 This is an actively evolving notebook. Some sections may be incomplete or “work in progress”.
-
-