# Architecture decisions

Decision records capture choices that should survive individual implementation
plans. Use the next sequential number and include:

- context and problem;
- decision;
- consequences;
- staged migration, if needed;
- conditions for revisiting the decision.

Do not create records for routine edits or choices that are still exploratory.

## Accepted records

| ADR | Scope | Current consequence |
| --- | --- | --- |
| [0001 — simulation authority boundary](0001-simulation-authority-boundary.md) | Fixed-step simulation, scene/presentation boundary, stable IDs, save authority | Loaded nodes may present and report geometry, but they do not own persistent facts or completion |
| [0002 — emergent world content and narrative](0002-emergent-world-content-and-narrative.md) | Typed packs, shared commands, causal facts, situations, dialogue, and one regional authority | New reusable content is data-first; new mechanics add bounded handlers; quests/dialogue project real world state |

The [developer index](../DEVELOPER_INDEX.md) summarizes how these decisions
appear in the current modules. Add a new ADR only when a choice should survive
multiple feature plans and has explicit revisit conditions.