# Tyre - Project Briefing
Last updated: 2026-02-09

## Current Project State
Commonwealth game: top-down immersive sim, single-character first-person perspective, asymmetric information core mechanic, Rimworld-style storyteller. 19 confirmed decisions, 12 discussion rounds complete. Pre-implementation phase - engine selection (Q-001) is next priority.

## Decisions Relevant to Your Role
- D-008: Z-levels, LOD, procedural generation - technical architecture implications
- D-010: Four architectural principles - client-server, deterministic sim, moddable, data-driven (ALL)
- D-011: LOS shadowcasting implementation for fog of war
- D-012: Chunk-based map architecture for streaming and generation
- D-014: v0.1 map specification - full technical requirements
- D-015: Camera lock to character - vision cone rendering and binaural audio hookup
- D-017: Perception as observer queries - technical pattern for all perception modes
- D-018: Sound propagation system - three-range model with wall occlusion
- D-019: Top-down primary view with potential future 3D client

## Open Questions Assigned to You
- Q-001: Engine selection (LEAD, CRITICAL - next priority)
- Q-002: v0.1 scope definition (co-lead)
- Q-005: Prototype scale (co-lead with Gestalt, Miri)
- Q-007: Target platforms

## Current Priorities
ENGINE SELECTION IS NEXT. Hard requirements from confirmed decisions:
- Client-server architecture (D-010)
- Deterministic simulation (D-010)
- Chunk-based maps (D-012)
- LOS shadowcasting with vision cone (D-011/D-015)
- Sound propagation (D-018)
- Observer-based perception queries (D-017)
- 2D top-down with potential 3D cutscenes (D-019)

## Key Documents
- DECISIONS.md - all confirmed decisions
- DISCUSSION.md - active discussion round
- docs/discussions/ - archived rounds
- TEAM.md - team roster