skillcheck

name	skillcheck
description	Validates SKILL.md files for spec-facing structure, sizing, references, cross-agent compatibility, and agent-authored critique or graph diagnostics.
version	1.3.0
author	Brad Kinnard (moonrunnerkc), Aftermath Technologies Ltd

Use this skill when validating a SKILL.md file or a directory of skill files with the skillcheck CLI.

Validate

Run the default symbolic checks:

skillcheck SKILL.md
skillcheck skills/ --format json

The report includes errors, warnings, and info diagnostics. Exit code 0 means no errors. Exit code 1 means at least one error, or warnings with --strict, or a regression with --fail-on-regression. Exit code 2 means input or argument error. Exit code 3 means symbolic validation passed but ingested agent critique found semantic errors.

Agent workflows

For semantic self-critique, emit a prompt and ingest the returned JSON:

skillcheck SKILL.md --emit-critique-prompt > prompt.txt
skillcheck SKILL.md --ingest-critique response.json

For capability graph work, use:

skillcheck SKILL.md --analyze-graph
skillcheck SKILL.md --emit-graph --format json

Configuration

skillcheck.toml can set CLI defaults and frontmatter extension fields:

[frontmatter]
extension_fields = ["my-org-tag", "internal-id"]