complete codex docs

docs/modules/util.md

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+# Utilities
+
+## Purpose
+
+Miscellaneous utility tools such as Steam ID conversion and game-adjacent helpers.
+
+## Current Status
+
+- Mixed
+- Functional but partly legacy
+
+## Dependencies
+
+- PHP BCMath extension
+
+## Database Tables
+
+- None declared in module metadata
+
+## Agent Interaction
+
+- some helper tools may use remote data or agent info
+
+## User Workflow
+
+- use helper tools when relevant
+
+## Admin Workflow
+
+- audit utilities and decide which are still product-relevant
+
+## Security Concerns
+
+- utility tools should not leak secrets or overreach permissions
+
+## Known Issues
+
+- mixed-value tool collection
+
+## Missing Functionality
+
+- clear product grouping and documentation
+
+## Suggested Future Improvements
+
+- keep useful tools, hide obsolete ones, and document by game relevance
+
+## Recommendation
+
+- Keep / Rewrite selectively
+