Unity Netcode for GameObjects Skills

Automation for Netcode for GameObjects (NGO) multiplayer setup and operations. Every skill is source-verified against NGO 2.x; when the package is absent, each skill returns a NoNetcode() error with install instructions.

Requires: com.unity.netcode.gameobjects (2.x), Unity 6000.0+. Strongly recommended: before calling any netcode_* skill, load netcode-design. NGO lifecycle and permission rules are strict; skills alone cannot prevent incorrect business code.

Guardrails

Mode: Full-Auto required

DO NOT (common hallucinations):

• netcode_spawn_object / netcode_spawn_player — do not exist. Spawn must happen in runtime code (NetworkBehaviour) via .Spawn() or NetworkManager.SpawnManager.InstantiateAndSpawn. Skills do not proxy Spawn because Spawn requires a running NetworkManager.
• netcode_register_scene — does not exist. Scene registration goes through Build Settings + EnableSceneManagement. This module only exposes netcode_configure_scene_management for reading/writing the config.
• netcode_set_tick_rate / netcode_set_protocol as standalone skills — do not exist. Use netcode_configure_manager for all NetworkConfig edits.
• Do not assume netcode_start_host works in Edit Mode. All Runtime control skills require PlayMode.
• Do not assume netcode_add_to_prefabs_list automatically attaches a NetworkObject component. Call netcode_add_network_object first.

Routing:

• Plain GameObject hierarchy creation → gameobject
• Attach NetworkObject / NetworkTransform / other networking components → this module
• Generic player-prefab components (Rigidbody / Collider / Animator) → component
• Runtime scene switching (LoadScene) → call NetworkManager.SceneManager.LoadScene from the generated NetworkBehaviour; this module does not execute it
• Code-level design decisions (RPC direction, NetworkVariable permission) → netcode-design advisory

Object Targeting

netcode_add_* / netcode_configure_* skills use the usual target parameters:

• name — scene object name
• instanceId — Unity InstanceID (exact)
• path — hierarchy path Parent/Child

Prefer instanceId when there is a chance of duplicate names.

Skills

Setup & Validation

Skill	Purpose	Key Parameters
netcode_check_setup	Verify package, NetworkManager, Transport, PlayerPrefab, and PrefabsList consistency	verbose?
netcode_create_manager	Create NetworkManager + UnityTransport	name?
netcode_configure_manager	Bulk-edit NetworkConfig (TickRate, ConnectionApproval, EnableSceneManagement, NetworkTopology, ...)	name?, 15+ optional fields
netcode_get_manager_info	Read NetworkConfig + runtime state	name?
netcode_remove_manager	Delete the NetworkManager (must already be Shutdown)	name?

Transport

Skill	Purpose	Key Parameters
netcode_set_transport_address	Direct connection: set Address / Port / ServerListenAddress	address, port, serverListenAddress?
netcode_set_relay_server_data	Relay mode (mutually exclusive with direct connection)	address, port, allocationIdBase64, keyBase64, connectionDataBase64, hostConnectionDataBase64?, isSecure?
netcode_set_debug_simulator	Simulate latency / jitter / packet loss (development only)	packetDelay, packetJitter, dropRate
netcode_get_transport_info	Read current transport info	name?

NetworkObject

Skill	Purpose	Key Parameters
netcode_add_network_object	Attach NetworkObject to a GameObject	name/instanceId/path + NetworkObject fields
netcode_configure_network_object	Modify fields on an existing NetworkObject	same as above
netcode_remove_network_object	Remove a NetworkObject (must not be currently spawned)	same as above
netcode_list_network_objects	List all NetworkObjects in scene (including runtime state)	includeInactive?
netcode_get_network_object_info	Query a single NetworkObject in detail	same as above

NetworkPrefabsList

Skill	Purpose	Key Parameters
netcode_create_prefabs_list	Create a NetworkPrefabsList asset	path, assignToManager?
netcode_add_to_prefabs_list	Add a prefab (optional override: None/Prefab/Hash)	listPath, prefabPath, overrideMode?, ...
netcode_remove_from_prefabs_list	Remove a prefab entry	listPath, prefabPath
netcode_list_network_prefabs	List every entry with its hash	listPath
netcode_set_player_prefab	Set NetworkConfig.PlayerPrefab	prefabPath, name?

Components

Skill	Purpose	Key Parameters
netcode_add_network_transform	Attach NetworkTransform with axis sync toggles	target + 15 optional fields
netcode_configure_network_transform	Edit fields / thresholds on an existing NT	includes PositionThreshold etc.
netcode_add_network_rigidbody	Attach NetworkRigidbody / NetworkRigidbody2D	useRigidbody2D?, useRigidBodyForMotion?
netcode_add_network_animator	Attach NetworkAnimator (Animator required)	target
netcode_add_network_behaviour_script	Generate a NetworkBehaviour script template (OnNetworkSpawn/Despawn + optional RPC/NetworkVariable/Ownership)	className, path, includeRpc?, includeNetworkVariable?, includeOwnershipCallbacks?
netcode_list_network_behaviours	List NetworkBehaviour subclass instances in the scene	includeInactive?

Scene & Spawning Query

Skill	Purpose
netcode_configure_scene_management	Set EnableSceneManagement / LoadSceneTimeOut / ClientSynchronizationMode
netcode_get_spawn_manager_info	Runtime: list SpawnedObjects
netcode_get_scene_manager_info	Runtime: read scene load state

Runtime Control (PlayMode required)

Skill	Purpose
netcode_start_host	Start Host
netcode_start_server	Start Server
netcode_start_client	Start Client
netcode_shutdown	Shut down (optional discardMessageQueue)
netcode_get_status	Read IsHost / IsServer / IsClient, LocalClientId, ConnectedClients, NetworkTime

Quick Start

import unity_skills as u

# 1. Inspect current state
u.call_skill("netcode_check_setup")

# 2. Create NetworkManager + UnityTransport
u.call_skill("netcode_create_manager", name="NetworkManager")

# 3. Configure the NetworkConfig
u.call_skill("netcode_configure_manager",
    tickRate=30,
    connectionApproval=False,
    enableSceneManagement=True,
    networkTopology="ClientServer")

# 4. Transport
u.call_skill("netcode_set_transport_address",
    address="127.0.0.1", port=7777, serverListenAddress="0.0.0.0")

# 5. Player prefab setup
#    NOTE: add_network_object on a prefab path depends on GameObjectFinder support.
#    Safer route: instantiate the prefab in the scene first, then attach.
u.call_skill("netcode_add_network_object", path="Assets/Prefabs/Player.prefab")
u.call_skill("netcode_create_prefabs_list", path="Assets/NetworkPrefabs.asset")
u.call_skill("netcode_add_to_prefabs_list",
    listPath="Assets/NetworkPrefabs.asset",
    prefabPath="Assets/Prefabs/Player.prefab")
u.call_skill("netcode_set_player_prefab", prefabPath="Assets/Prefabs/Player.prefab")

# 6. Generate a NetworkBehaviour template
u.call_skill("netcode_add_network_behaviour_script",
    className="PlayerController",
    path="Assets/Scripts/PlayerController.cs",
    includeRpc=True, includeNetworkVariable=True)

# 7. Drive the session in PlayMode
u.call_skill("editor_play")   # enter PlayMode
u.call_skill("netcode_start_host")
u.call_skill("netcode_get_status")
u.call_skill("netcode_shutdown")
u.call_skill("editor_stop")

Critical Rules (must read)

1. Spawn/Despawn are not exposed as skills. They must be called from NetworkBehaviour runtime code (Server authority). Skills handle prefab registration and NetworkManager lifecycle only.
2. PlayerPrefab must be in a NetworkPrefabsList (enforced at runtime on 2.x). Register it with netcode_add_to_prefabs_list.
3. Runtime control skills (start_*/shutdown) require PlayMode. Calls from Edit Mode return an error.
4. Address vs ServerListenAddress have different meaning. On a client, Address is the target server IP. On a server, ServerListenAddress is the bind address (usually 0.0.0.0).
5. useRigidbody2D switches between NetworkRigidbody and NetworkRigidbody2D. Unrelated physics settings (e.g. Physics2D.AutoSyncTransforms) live elsewhere.

Version Scope

Targets NGO 2.x (validated against 2.11.0). Legacy 1.x (old prefabs list layout, different RPC model) is out of scope for this module.

Exact Signatures

For exact parameter names, defaults, and return fields, query GET /skills/schema or unity_skills.get_skill_schema(). This document is a routing and best-practice guide, not the authoritative signature source.