chore: add review docs skill

.claude/skills/review-docs/SKILL.md

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+---
+name: review-docs
+description: >
+  Review a PatternFly Element's inline documentation quality against
+  cem conventions. Checks CSS custom property comments, slot and part
+  HTML comments, JSDoc tags, and cem health. Use when asked to
+  "review docs", "check documentation", "audit docs", or
+  "check doc comments".
+tools: Read, Glob, Grep, Bash
+---
+
+# Documentation Review
+
+Review a PatternFly Element's inline documentation against project
+conventions and cem analyzer requirements. Documentation feeds the
+custom elements manifest which powers LSP autocomplete, MCP-based
+AI assistance, and dev server knobs.
+
+Reference: https://bennypowers.dev/cem/docs/usage/documenting-components/
+
+## Conventions
+
+These conventions follow the cem documentation guide. The goal is
+co-location: document each API surface next to the code it describes.
+
+### Slots and Parts — HTML Comments in Template
+
+Prefer inline HTML comments over JSDoc `@slot` and `@csspart` tags.
+HTML comments stay co-located with the markup they describe. The cem
+analyzer extracts slot and part info from template comments — JSDoc
+`@slot` and `@csspart` tags are redundant and SHOULD be removed.
+
+Three comment formats are supported, in order of complexity:
+
+**Plain comment** (description only):
+
+```html
+<!-- Button label content. SHOULD contain text. -->
+<slot></slot>
+
+<!-- The native button element -->
+<button part="button">
+```
+
+**Single-key YAML** (summary label for tooling previews):
+
+```html
+<!-- summary: Button label content -->
+<slot></slot>
+```
+
+**Multi-key YAML** (summary + description + deprecated):
+
+```html
+<!--
+  summary: The main slot for content
+  description: |
+    This slot displays user-provided content.
+    Supports multiline **markdown**.
+  deprecated: true
+-->
+<slot></slot>
+```
+
+When an element has both `slot` and `part` attributes, use nested
+keys:
+
+```html
+<!-- slot: The info slot
+     part:
+       summary: Short label
+       description: Longer description of the part -->
+<slot name="info" part="info-part"></slot>
+```
+
+The default slot does not require a comment but benefits from one
+when the expected content is non-obvious.
+
+### CSS Custom Properties — Comments in CSS Source
+
+Prefer documenting CSS custom properties in CSS sources rather than
+with JSDoc `@cssprop` tags on the class. CSS comments keep
+documentation co-located with the property definitions.
+
+Use `/** */` comments in the CSS file. Position matters when both
+LHS (private `--_` property) and RHS (`var()` call) contain custom
+properties:
+
+```css
+/** Comment for the private property --c */
+--c:
+  /** Comment for the public override --d */
+  var(--d);
+```
+
+When a `var()` is the direct value of a CSS property:
+
+```css
+/** Gap between toggle and label */
+column-gap: var(--pf-v6-c-switch--ColumnGap, 0.5rem);
+```
+
+For the common private-to-public pattern used in this project:
+
+```css
+--_bg:
+  /** Default label background color */
+  var(--pf-v6-c-label--BackgroundColor,
+    var(--pf-t--global--color--nonstatus--gray--default,
+      light-dark(...)));
+```
+
+CSS comments also support `@summary`, `@deprecated`, and `@syntax`
+tags for richer metadata:
+
+```css
+/**
+ * A property defined on the host
+ * @summary The host's custom property
+ * @deprecated Use the `color` property instead
+ */
+--host-property: red;
+```
+
+Every public `--pf-v6-c-{name}--*` custom property SHOULD have an
+inline CSS comment at its first use site. Color modifier overrides
+(e.g. `--m-blue--BackgroundColor`) are self-documenting by naming
+and do not need per-line comments — but the base tokens and key
+modifier sections (outline, compact, disabled, overflow) do.
+
+### Events — `@fires` JSDoc (Preferred)
+
+`@fires` remains the preferred documentation method for events.
+Keep on a single line:
+
+```ts
+* @fires {LabelCloseEvent} close - Fired when the close button is activated
+```
+
+### Attributes — `@attr` JSDoc or Property JSDoc
+
+Attributes are typically documented via their corresponding
+`@property` decorator JSDoc. Use `@attr` only when an attribute
+exists without a corresponding property.
+
+### Class-Level JSDoc
+
+Every element class MUST have:
+
+- A description paragraph (first text in the JSDoc)
+- A `@summary` tag (short one-liner for manifest)
+
+```ts
+/**
+ * A label is a compact element for categorization, status, or metadata.
+ *
+ * @summary Compact tag for categorization, status, or metadata display.
+ *
+ * @fires {LabelCloseEvent} close - Fired when close button is activated
+ */
+```
+
+### Property JSDoc
+
+Every `@property` MUST have a `/** */` JSDoc comment describing
+its purpose:
+
+```ts
+/** Renders the label at a smaller, compact size. */
+@property({ type: Boolean, reflect: true }) compact = false;
+```
+
+Do not add `@default` tags — the cem analyzer picks up initializers
+automatically.
+
+### Effective AI Descriptions
+
+Per https://bennypowers.dev/cem/docs/usage/effective-mcp-descriptions/:
+
+- Describe purpose and context, not just what it is
+- Use RFC 2119 keywords (MUST, SHOULD, AVOID) for validation rules
+- Keep descriptions under 400 characters (2000 char hard limit)
+- Include usage guidelines, relationships, and constraints
+- Combine type annotations with guideline-rich descriptions
+
+## Workflow
+
+### Phase 1: Read Element
+
+Read:
+- `elements/pf-v6-{name}/pf-v6-{name}.ts`
+- `elements/pf-v6-{name}/pf-v6-{name}.css`
+
+### Phase 2: Check CSS Inline Comments
+
+For each `--pf-v6-c-{name}--*` custom property referenced in the
+CSS file:
+
+- [ ] Has a `/** description */` comment at its first use site?
+- [ ] Comment is co-located (between private prop name and `var()`)?
+- [ ] Description is concise and describes what the property controls?
+
+Flag public properties that lack inline CSS comments.
+
+### Phase 3: Check Slot and Part Documentation
+
+For each `<slot>` and `part="..."` element in the render template:
+
+- [ ] Has an HTML comment immediately before it?
+- [ ] Comment uses plain, single-key YAML, or multi-key YAML format?
+- [ ] No `@slot` JSDoc tags on the element class? (remove if found)
+- [ ] No `@csspart` JSDoc tags on the element class? (remove if found)
+
+### Phase 4: Check Event Documentation
+
+For each `dispatchEvent()` call:
+
+- [ ] `@fires` JSDoc tag exists on the element class?
+- [ ] Description is single-line with ` - ` separator?
+- [ ] Event class is referenced (e.g. `{LabelCloseEvent}`)?
+
+### Phase 5: Check Property JSDoc
+
+For each `@property` decorator:
+
+- [ ] Has `/** */` JSDoc comment?
+- [ ] Description is concise and accurate?
+- [ ] No `@default` tags (analyzer picks up initializers)?
+
+### Phase 6: Check Class-Level JSDoc
+
+- [ ] Description paragraph present (first text)?
+- [ ] `@summary` tag present?
+- [ ] No `@slot` tags? (slots documented via HTML comments only)
+- [ ] No `@csspart` tags? (parts documented via HTML comments only)
+- [ ] `@fires` tags present for all events?
+- [ ] Descriptions use RFC 2119 keywords where applicable?
+
+### Phase 7: Run cem health
+
+```bash
+cem health --component pf-v6-{name} --format json
+```
+
+Flag any category below 80%.
+
+### Phase 8: Report
+
+```markdown
+## Documentation Review: pf-v6-{name}
+
+### Summary
+- CSS inline comments: X/Y properties documented
+- Slots: X/Y documented with HTML comments
+- Events: X/Y documented with `@fires`
+- Properties: X/Y have JSDoc
+- cem health: X%
+
+### Missing CSS Comments
+[List of public properties without inline comments]
+
+### Missing Slot/Part Comments
+[List of slots/parts without HTML comments]
+
+### Stale JSDoc Tags
+[`@slot` or `@csspart` tags that should be removed]
+
+### Format Issues
+[Other documentation problems]
+
+### Suggestions
+[Nice to have]
+```
+
+## Principles
+
+- Co-location: document each API surface next to the code it describes
+- Inline CSS comments are the primary documentation for custom properties
+- HTML template comments are the sole documentation for slots and parts
+- Do NOT use `@slot` or `@csspart` JSDoc tags — remove them if found
+- `@fires` and `@attr` JSDoc remain the preferred method for events and attributes
+- Documentation feeds LSP, MCP, and dev server — quality directly affects DX