Fix 77 markdown lint errors across agent skill docs

Add .markdownlint-cli2.jsonc to suppress MD013 (line-length) and MD041
(first-line-heading) which are inappropriate for agent skill files with
YAML frontmatter and code examples.

Fix genuine structural issues in all affected files:
- Add blank lines around headings (MD022)
- Add blank lines around fenced code blocks (MD031)
- Add blank lines around lists (MD032)
- Add language specifiers to bare code fences (MD040)

Resolves: PRI-93

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/agents/artifacthub-headlamp.md

@@ -40,6 +40,7 @@ owners:
 ```
 
 **How to get the repositoryID:**
+
 1. Log into artifacthub.io
 2. Go to Control Panel → Repositories → Add
 3. Select repository kind: "Headlamp plugins"
@@ -99,6 +100,7 @@ annotations:                                   # CRITICAL — Headlamp-specific
 These annotations in `artifacthub-pkg.yml` are what make ArtifactHub treat the package as a Headlamp plugin:
 
 ### headlamp/plugin/archive-url
+
 **Required.** Direct download URL to the plugin tarball on GitHub Releases.
 
 Format: `https://github.com/<owner>/<repo>/releases/download/v<VERSION>/<pkgname>-<VERSION>.tar.gz`
@@ -108,6 +110,7 @@ Format: `https://github.com/<owner>/<repo>/releases/download/v<VERSION>/<pkgname
 - The tarball is uploaded as a GitHub Release asset — NOT to ArtifactHub
 
 ### headlamp/plugin/archive-checksum
+
 **Recommended.** SHA256 checksum of the tarball.
 
 Format: `sha256:<hex-digest>`
@@ -117,14 +120,17 @@ Generated via: `sha256sum <tarball> | awk '{print $1}'`
 Can be empty string if not yet computed (release workflow fills it in).
 
 ### headlamp/plugin/version-compat
+
 **Required.** Minimum Headlamp version the plugin works with.
 
 Format: `>=X.Y.Z` (e.g., `>=0.20.0`, `>=0.26`)
 
 ### headlamp/plugin/distro-compat
+
 **Required.** Comma-separated list of supported Headlamp deployment targets.
 
 Valid values:
+
 - `in-cluster` — Headlamp running inside a Kubernetes cluster
 - `web` — Web-based Headlamp deployment
 - `app` — Headlamp desktop application (Electron)
@@ -138,6 +144,7 @@ Example: `"in-cluster,web,app"`
 ## ArtifactHub Categories
 
 Valid `category` values for Headlamp plugins:
+
 - `security` — Secrets, RBAC, policy enforcement
 - `storage` — CSI drivers, persistent volumes, Ceph/Rook
 - `monitoring-logging` — Metrics, GPU monitoring, observability
@@ -148,7 +155,9 @@ Valid `category` values for Headlamp plugins:
 ## Optional Fields
 
 ### containersImages
+
 For plugins associated with a specific container/operator:
+
 ```yaml
 containersImages:
   - name: <component-name>
@@ -156,14 +165,18 @@ containersImages:
 ```
 
 ### recommendations
+
 Link to related ArtifactHub packages:
+
 ```yaml
 recommendations:
   - url: https://artifacthub.io/packages/helm/<repo>/<chart>
 ```
 
 ### install
+
 Custom installation instructions (markdown):
+
 ```yaml
 install: |
   ## Install via Headlamp Plugin Manager
@@ -171,6 +184,7 @@ install: |
 ```
 
 ### logoPath
+
 Path to a logo image file in the repo (relative to root).
 
 ---
@@ -179,7 +193,7 @@ Path to a logo image file in the repo (relative to root).
 
 This is the actual flow. There is NO other way to publish:
 
-```
+```text
 1. Developer triggers release workflow (workflow_dispatch with version)
 2. CI runs tests
 3. Workflow updates:
@@ -196,6 +210,7 @@ This is the actual flow. There is NO other way to publish:
 ```
 
 **Key points:**
+
 - Steps 1-9 happen in your GitHub Actions workflow
 - Step 10 is entirely controlled by ArtifactHub — you cannot trigger it
 - The tarball lives on GitHub Releases, not ArtifactHub
@@ -220,7 +235,7 @@ This is the actual flow. There is NO other way to publish:
 
 The plugin tarball built by `@kinvolk/headlamp-plugin` contains:
 
-```
+```text
 <pkgname>/
   main.js          # Bundled plugin code
   package.json     # Plugin metadata
@@ -233,6 +248,7 @@ The `<pkgname>` directory inside the tarball matches the `name` field from `pack
 ## Validating Metadata
 
 Before committing, check:
+
 1. `version` matches across `package.json` and `artifacthub-pkg.yml`
 2. `archive-url` version tag matches the `version` field
 3. `name` in `artifacthub-pkg.yml` matches `package.json` `name`

.claude/agents/headlamp-plugin-developer.md

@@ -99,6 +99,7 @@ class KubeObject<T extends KubeObjectInterface> {
 ### ResourceClasses
 
 All standard K8s resource types available (Secret, Namespace, Pod, etc.):
+
 ```typescript
 const [secrets, error, loading] = K8s.ResourceClasses.Secret.useList({ namespace: 'default' });
 const [secret, error] = K8s.ResourceClasses.Secret.useGet('my-secret', 'default');
@@ -127,7 +128,8 @@ ApiProxy.apiFactory(group, version, resource): ApiClient
 ```
 
 **Service proxy URL** (accessing in-cluster services):
-```
+
+```text
 /api/v1/namespaces/${ns}/services/http:${name}:${port}/proxy${path}
 ```
 
@@ -146,6 +148,7 @@ From `@kinvolk/headlamp-plugin/lib/CommonComponents`:
 `PercentageBar` — bar chart with `data` array of `{ name, value, fill }`
 
 ### SimpleTable (non-obvious props)
+
 ```typescript
 <SimpleTable
   data={items}
@@ -158,6 +161,7 @@ From `@kinvolk/headlamp-plugin/lib/CommonComponents`:
 ```
 
 ### NameValueTable (non-obvious props)
+
 ```typescript
 <NameValueTable
   rows={[
@@ -168,6 +172,7 @@ From `@kinvolk/headlamp-plugin/lib/CommonComponents`:
 ```
 
 ### ConfigStore
+
 ```typescript
 import { ConfigStore } from '@kinvolk/headlamp-plugin/lib';
 const store = new ConfigStore<MyConfig>('plugin-name');
@@ -177,6 +182,7 @@ store.useConfig(): () => MyConfig;
 ```
 
 ### Pre-bundled (no package.json entry needed)
+
 react, react-dom, react-router-dom, @iconify/react, react-redux, @material-ui/core, @material-ui/styles, lodash, notistack, recharts, monaco-editor
 
 ---
@@ -264,6 +270,7 @@ vi.mock('@kinvolk/headlamp-plugin/lib/CommonComponents', () => ({
 Headlamp supports light and dark themes. **Never hardcode colors.** Use CSS custom properties with light-mode fallbacks:
 
 ### Required CSS variables for inline styles
+
 ```typescript
 // Text
 color: 'var(--mui-palette-text-primary)'
@@ -289,6 +296,7 @@ color: 'var(--link-color, #1976d2)'
 ```
 
 ### Common mistakes to avoid
+
 - **NEVER** use raw `#fff`, `#000`, `#333`, `#666` etc. without wrapping in `var(--mui-palette-*)`
 - **NEVER** use `rgba(0,0,0,0.5)` for overlays without a variable — this is the one exception where raw rgba is acceptable (backdrop overlays)
 - **NEVER** assume white backgrounds or dark text — always use `background-paper`/`text-primary`
@@ -296,6 +304,7 @@ color: 'var(--link-color, #1976d2)'
 - Fallback values after the comma are for environments where the variable isn't set — always use the light-mode default
 
 ### Form inputs in custom components
+
 ```typescript
 const inputStyle = {
   border: '1px solid var(--mui-palette-divider, #ccc)',

.markdownlint-cli2.jsonc

@@ -0,0 +1,8 @@
+{
+  "config": {
+    // Line length — not enforced for agent skill docs with code examples
+    "MD013": false,
+    // First line heading — files use YAML frontmatter, not headings
+    "MD041": false
+  }
+}

CLAUDE.md

@@ -4,7 +4,7 @@ This repository is the home for developing and maintaining Claude Code agent ski
 
 ## Repository Structure
 
-```
+```text
 .claude/agents/          # Agent skill definitions (markdown with YAML frontmatter)
 README.md                # Project documentation
 ```