openitemdef

openitemdef is a C library for Steam Inventory Schemas validation, focused on accurate diagnostics, clear architecture, and long-term extensibility.

This project is designed as a core validation engine library, not a one-off CLI tool.
It can be embedded in CLIs, CI pipelines, editors, or future GUI tools without rewriting the core logic.

Features

• A semantic validator for Steam Inventory schemas
• A parser-agnostic core (JSON backend can be swapped)
• A foundation for:
  • CLI validation
  • CI checks
  • VS Code / editor integrations
  • GUI tooling

What this project is NOT

• A schema editor
• A formatter or rewriter
• A Steamworks replacement
• A monolithic tool mixing parsing, validation, and output

Roadmap

v0.1 - Core foundation

• Diagnostics model
• Source spans and line mapping
• JSON backend adapter
• LocationMap v1
• Minimal validation pipeline

No Steam rules yet.

v1.0 - Semantic rules

• Duplicate itemdefid detection
• Type validation
• Values format validation
• Required fields
• Bundle / exchange validation
• Cross-reference checks

Library is usable and v1.0 is shipped.