$ARGUMENTS is a file path or directory to audit. If empty, ask the user what to audit.

Use these configuration defaults unless the user provides overrides. Ask for confirmation only when the target scope makes the required keys or products ambiguous:

Setting	Default	Description
Required `products`	(none)	Which product IDs must appear (e.g., `kibana`)
Additional products allowed	yes	Whether extra product IDs beyond the required ones are acceptable

Required frontmatter elements

Check each file for the following elements:

1. `products` (mandatory)

Must include the configured required product IDs. May include additional products. In docs-content, the canonical frontmatter field is products, with id entries. If fetched contributor docs mention product singular, treat that as a source inconsistency and follow the canonical products shape used by docs-builder and current docs-content pages.

products:
  - id: kibana

Flag files missing this element or missing required products. Don't remove existing additional products. Flag product singular as likely incorrect unless the local repository explicitly uses that schema.

2. `description` (mandatory)

Validate against these rules:

Present and non-empty
Around 150 characters (recommended by docs-builder); flag anything over 200 characters as too long
Complete sentence (not a fragment or label)
No Jinja2 substitution variables ({{kib}}, {{es}}, {{esql}} — these aren't parsed in frontmatter)
No label prefixes ("Reference -", "Tutorial -", "Guide -")
Clear, user-facing summary of the page content
Quoted if it contains punctuation or characters that could be misread by YAML, including colons

3. `navigation_title` (recommended)

Check if the H1 title exceeds ~50 characters. If so, flag that a navigation_title should be added.

navigation_title: "Configure ML alerts"

4. `mapped_pages` (preserve)

If present, don't flag or suggest changes. If absent, don't suggest adding it.

Execution

Glob for all .md files in the specified scope
Read the frontmatter of each file
Validate each element against the rules above
Read the H1 title to check length for navigation_title
Compile the report

Report format

## Frontmatter audit: <scope>

**Configuration:**
- Required products: kibana
- Files scanned: N

### Issues found

#### Missing `products`
| File | Issue |
|------|-------|
| path/to/file.md | Missing `kibana` product |

#### Invalid or missing `description`
| File | Issue |
|------|-------|
| path/to/file.md | Missing description |
| path/to/other.md | Contains Jinja2 variables |
| path/to/third.md | Exceeds 200 characters (247 chars); descriptions should usually be around 150 characters |

#### Missing `navigation_title`
| File | H1 length |
|------|-----------|
| path/to/file.md | 63 chars |

### Summary

- ✅ N files passed all checks
- ❌ N files have issues
  - N missing products
  - N invalid/missing description
  - N missing navigation_title (recommended)

Group issues by type, not by file, so users can batch-fix related problems. Only include sections that have issues.

Required frontmatter elements

1. products (mandatory)

2. description (mandatory)

docs-frontmatter-audit

Inputs