**CRITICAL: Documentation is now a NON-NEGOTIABLE requirement**
- Added ironclad rule: Every git commit MUST update copilot-instructions.md
- NO EXCEPTIONS - this is a real money trading system
- Undocumented fixes = forgotten fixes = financial losses
- Future AI agents need complete context for data integrity
**What must be documented:**
- Bug fixes → Common Pitfalls (symptom, root cause, fix, lesson)
- New features → Architecture Overview, Critical Components
- Database changes → Important fields, filtering requirements
- Config changes → Configuration System section
- Breaking changes → When Making Changes section
**Examples of proper documentation:**
- Common Pitfall #56: Ghost orders (a3a6222)
- Common Pitfall #57: P&L inaccuracy (8e600c8)
- Common Pitfall #55: BlockedSignalTracker (6b00303)
**This is not optional - documentation is part of 'done'**
9d92428c63