/godot-ai-navigation

Migration notes: godot-ai-navigation

Incremental upgrade for topics this skill covers. Apply one hop, stabilize/test, then next. Never skip hops.

If the project is < 4.0, follow godot-version-migration era bridges (legacy → 3→4) until 4.0, then these hops. Official 3→4: Upgrading from Godot 3 to Godot 4.

4.0 → 4.1

Official: Upgrading to Godot 4.1

• NavigationAgent2D/3D.set_velocity() removed — assign velocity property each physics frame for RVO avoidance.
• time_horizon split into time_horizon_agents and time_horizon_obstacles — retune avoidance crowding separately for agents vs static obstacles.
• NavigationAgent3D.agent_height_offset → path_height_offset; ignore_y removed — grep skill scripts for the old property name.
• NavigationObstacle*.estimate_radius removed; get_rid() → get_agent_rid().
• NavigationServer*.agent_set_callback() → agent_set_avoidance_callback(); legacy target-velocity / time-horizon server APIs split or removed.
• PathFollow2D.lookahead removed — update 2D escort / patrol samples that follow baked paths.

4.1 → 4.2

Official: Upgrading to Godot 4.2

No skill-relevant breaking changes for this hop.

4.2 → 4.3

Official: Upgrading to Godot 4.3

• AStar2D/3D/Grid2D.get_*_path() gain allow_partial_path — enable when agents should move toward a unreachable target instead of failing.
• NavigationRegion2D experimental avoidance props (avoidance_layers, constrain_avoidance, …) removed — use NavigationAgent2D RVO on agents instead of region-side avoidance.

4.3 → 4.4

Official: Upgrading to Godot 4.4

• NavigationServer2D/3D.query_path() gains optional callback — use for async path requests without blocking the main thread.

4.4 → 4.5

Official: Upgrading to Godot 4.5

• Navigation regions update asynchronously by default (navigation/world/region_use_async_iterations) — wait a frame or poll before assuming rebaked navmesh is query-ready after geometry edits.
• Navmesh merge order changed — edge merge errors may surface; tune merge_rasterizer_cell_scale and fix overlapping navmesh sources.

4.5 → 4.6

Official: Upgrading to Godot 4.6

• AStar*.get_point_path() / get_id_path() return empty path when from_id is disabled/solid — treat empty as "no route" instead of error/null.

4.6 → 4.7

Official: Upgrading to Godot 4.7

No skill-relevant breaking changes for this hop.