Architecture Notes

This section collects design records, invariants, implementation notes, and historical architecture reviews.

For the current contributor-facing map of the codebase, start with the Codebase Guide. The pages here provide deeper background and context.

Current design references

• Design Decisions
• Invariants
• Multi-language Design
• Testing Strategy
• Approximate Betweenness

Historical notes and reviews

These pages are useful context, but may describe earlier implementation states or completed improvement plans:

• Architecture Overview
• Architecture Review
• Audit Report
• Improvements
• Improvements Summary
• SQLite Pipeline Refactor

When current behavior conflicts with historical notes, prefer the Codebase Guide and source code.