Skill Content Validator
Validates all SKILL.md files in the repository for broken links, missing references, and invalid paths.
What This Skill Does
- Runs deterministic validation script - Fast, consistent checking of all links
- Generates structured report - JSON output with all issues found
- Spawns fixer subagent - AI-powered fix suggestions for issues
- Presents fix plan - Diff-style changes for approval
- Executes approved fixes - Only applies changes user approves
Validation Checks
| Check Type | Description |
|---|---|
| External URLs | HTTP HEAD request to verify accessibility |
| Skill references | Verify referenced skills exist (e.g., umbraco-dashboard) |
| Internal links | Check relative paths resolve (e.g., patterns/foo.md) |
| File paths | Verify Umbraco-CMS paths via GitHub API if not local |
| Import paths | Check @umbraco-cms/backoffice/* imports are valid |
Running the Validator
Via Slash Command
/validate-skillsVia Script Directly (CI/CD)
cd .claude/skills/umbraco-skill-validator/scripts
npm install
npm run validateReport Format
The script outputs JSON that gets formatted as:
# Skill Validation Report
## Summary
- Skills scanned: 25
- Issues found: 3
- Auto-fixable: 2
## Issues by Skill
### `umbraco-dashboard`
| Line | Type | Issue | Status |
|------|------|-------|--------|
| 45 | Broken URL | [example-broken-url] returns 404 | :x: |
### `umbraco-tree`
| Line | Type | Issue | Status |
|------|------|-------|--------|
| 72 | Missing skill | [example-missing-skill] not found | :x: |Fix Plan Format
When issues are found, the fixer subagent generates:
# Fix Plan
## Fix 1: Update broken URL
**File:** plugins/.../umbraco-dashboard/SKILL.md
**Line:** 45
**Action:** Replace with current documentation URL
- [Dashboard docs][old-url]
+ [Dashboard docs][new-url]
## Approval
- [ ] Fix 1: Update broken URL
- [ ] Fix 2: ...Link Patterns Detected
External URLs
https://docs.umbraco.com/...
https://github.com/umbraco/...Skill References
`umbraco-dashboard`
`umbraco-workspace`Internal Pattern Links
[Pattern Name](patterns/pattern-name.md)
[Example](examples/example-name/)File Paths
/Umbraco-CMS/src/Umbraco.Web.UI.Client/...
src/packages/core/...Import Paths (in code blocks)
import { ... } from '@umbraco-cms/backoffice/notification';Workflow Instructions
When this skill is invoked:
- Run the validation script
cd.claude/skills/umbraco-skill-validator/scripts npx tsx validate-links.ts - Read the JSON output from stdout or
validation-report.json - Format as markdown report using the template above
- If issues found, spawn the
skill-content-fixeragent:
- Pass the JSON report as context - Request fix suggestions with diffs
- Present fix plan to user with AskUserQuestion
- Execute only approved fixes using Edit tool
Edge Cases
- Rate limiting: Script batches URL checks with 100ms delays
- Redirects: Reported as warnings with new URL suggestion
- Missing Umbraco-CMS: Falls back to GitHub API
- Timeouts: 5 second timeout per URL request
- Large repos: Processes files in batches of 10