---
title: Explanation
modified: 2026-03-03
tags:
  - explanation
  - meta
---

# Explanation

Background context and design decisions.

- [[design]] — Hephaestus design document: vision, data model, architecture, sync, and roadmap
- [[task-lifecycle]] — the two-axis task model (lifecycle state × attention), drop vs delete, and where each task shows up
- [[hub-spoke-data-evolution]] — why op-based sync lets most new features skip migrations, and when a coordinated SQLite migration is actually required