Link Validation Skill

Validates markdown links in your workspace using lychee.

What It Does

At session end (Stop hook), this skill:

1. Discovers all markdown files in your workspace
2. Runs lychee to check for broken links
3. Lints paths for policy violations (absolute paths, excessive traversal)
4. Outputs JSON results for programmatic consumption

Requirements

• lychee installed (brew install lychee)
• Python 3.11+ and uv

Output

Results are written to .link-check-results.md in your workspace:

# Link Check Results

**Correlation ID**: `01JEGQXV8KHTNF3YD8G7ZC9XYK`

## Lychee Link Validation

No broken links found.

## Path Policy Violations

No path violations found.

Path Policy Rules

| Rule | Severity | Description | | -------------------- | -------- | -------------------------------------- | | NO_ABSOLUTE_PATHS | Error | Filesystem absolute paths not allowed | | NO_PARENT_ESCAPES | Warning | Excessive ../ may escape repository | | MARKETPLACE_RELATIVE | Warning | Plugins should use ./ relative paths |

Configuration

Override the default lychee config by placing .lycheerc.toml in your workspace root.

See config/lychee.toml for the default configuration.

References

• ADR: Link Checker Plugin Extraction
• Design Spec
• lychee Documentation