Personal Memory Engine: Supabase RLS + FastAPI Implementation
[Engineering System ADR-001](https://github.com/xingaiapp/xingai-engineering-system/blob/main/docs/adr/001-personal-memory-engine.md) defined the architecture. [Invest AI ADR-03…
fastapi
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· XingAI Meal Coach AI
Meal AI: Worker + Cache for Health-Aware Meal Planning
Meal AI is the health domain of XingAI — nutrition planning, meal recommendations, and caregiver support for family members with specific health conditions.
· XingAI Invest AI
Saved Preferences Are Not Decisions: Tracking Stocks Without Breaking the Worker Boundary
A financial decision system has two very different kinds of state:
· Research AI
The Learning Decision Boundary: Worker Owns Research AI Verdicts
Research AI answers a different question than Google:
· XingAI Invest AI
The Decision Cache Boundary: Worker Computes, API Reads
The most important Invest AI architecture rule is simple:
· XingAI Invest AI
Capping Free-Tier AI Calls Without Slowing Down Development
Three endpoints burn real tokens on every hit:
· XingAI Invest AI
Four Runtimes, One Repo: Why We Skipped Nx (For Now)
Invest AI is not one app — it is four top-level packages:
· XingAI Invest AI
CQRS with SQLite: One Writer, Many Readers, No Drama
Market dashboards want fresh data. Upstream APIs want low call volume. Users want sub-200ms first paint.