---
title: "Oscar - Project Briefing"
description: "Networking/multiplayer agent on standby — covers client-server IPC architecture, deterministic simulation sync, and future multiplayer design"
type: briefing
status: active
agent: Oscar
updated: 2026-03-13
---

# Oscar - Project Briefing
Last updated: 2026-03-13

## Current Project State
See [PROJECT_STATE.md](../../PROJECT_STATE.md) for shared project state (cascade phase, sprint, decision count).

## Status
STANDBY. This briefing will be populated when networking/multiplayer implementation begins.

## Key Decisions for Your Domain
Read `decisions/architecture.md` (primary). Key decisions:
- **D-009:** Multiplayer strategy (design for it, build single-player first)
- **D-010:** Four architectural principles (client-server, info boundaries, deterministic sim)
- **D-020:** Subprocess/IPC architecture — local socket for single-player, TCP for multiplayer
- **D-026:** Simulation tier sync — deterministic eviction across all observers for future multiplayer

## Development Workflow
See `docs/DEVOPS.md` for full procedures. Your key targets:
- `make setup` — verify Rust toolchain and Godot
- `make build` — build both client and server
- `make test` — run all tests (IPC round-trip tests critical for your domain)
- `make ci` — full CI pipeline locally
- Server code: `server/` (Rust, networking layer)
- Client code: `client/` (Godot, network client)
- Cross-boundary tests: `tests/` (IPC serialization fixtures, protocol regression)

## Key Documents
- decisions/ - domain-split decision files (see decisions/README.md for index)
- docs/DEVOPS.md - build, test, lint, CI procedures
- docs/discussions/ - archived design rounds