Preserve this project's request validation and error catalog.
Scanned 9/2/2026
Install to Claude Code
Skills Directorynpx -y skills add SeoNaRu/nulnul-harness --skill project-api-validation --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: project-api-validation
description: Preserve this project's request validation and error catalog.
---
# Project API validation
Reject invalid request values before side effects, preserve the project error
envelope, update the error catalog for new codes, and run the API contract check.
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