# Contract Checker

> Validates contract JSON Schemas and fixtures, fails fast on breaking format issues.

- Skill: `majiayu000/contract-checker` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/contract-checker`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/contract-checker/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/contract-checker

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# Contract Checker Skill

## Inputs
- JSON fixtures in `skills/contract-checker/fixtures/`.
- Command and decision JSON schemas in `contracts/schemas/`.

## Outputs
- Validation report printed to stdout.
- Non-zero exit status when fixtures do not match schemas.

## Steps
1. Load command and decision schemas.
2. Validate each fixture against the correct schema.
3. Treat `invalid_*.json` fixtures as expected failures.
4. Emit a summary and exit with status 1 if expectations are not met.

## Definition of Done (DoD)
- All fixtures validate against their expected schema outcome.
- Invalid fixtures fail validation as expected.
- Script exits cleanly with status 0 when expectations are met.