Godot 4.7 Baseline

• Expert patterns in this skill target Godot 4.7+ (stable, 2026-06-18).
• Consult the Godot 4.7 migration guide when upgrading projects from 4.6.
• NEVER assume 4.6 defaults (stretch mode, audio area_mask, RichTextLabel percent flags) without checking 4.7 migration notes.

Adapt: Single to Multiplayer

Expert guidance for retrofitting multiplayer into single-player games.

NEVER Do (Expert Multiplayer Rules)

Security & Authority

• NEVER trust client-reported state — Clients own their 'Input', NOT their 'Position' or 'Health'. Server must validate every coordinate and health change.
• NEVER use get_tree() groups for authority checks — Use is_multiplayer_authority(). Group registration is non-deterministic in high-latency joins.
• NEVER allow unrestricted RPC rates — A malicious client can call a 'FireWeapon' RPC 10,000 times per second. Always implement rate-limiting (net_rpc_rate_limiter.gd).