How to Run Security Audits for Multiplayer Networking in Claude Code Game Studios

Run a comprehensive security audit for multiplayer networking by invoking the Security‑Audit skill in network mode, which spawns a security‑engineer sub‑agent to scan for server‑authority violations, unvalidated packet handling, and insecure RPC implementations across Godot, Unity, or Unreal codebases.

The Claude‑Code‑Game‑Studios framework provides a structured, automated pipeline for auditing multiplayer networking code. By leveraging the Security‑Audit skill defined in .claude/skills/security-audit/SKILL.md alongside the Network‑Programmer specialist, development teams can systematically identify high‑risk vulnerabilities before production deployment.

Prerequisites and Scope Definition

Before initiating the audit, you must understand the available audit modes and how the framework tailors checks to your specific engine and language.

Understanding the Security-Audit Skill

The Security‑Audit skill is located at .claude/skills/security-audit/SKILL.md and defines a repeatable workflow for analyzing codebases. According to the source documentation, this skill supports multiple audit modes, with the network mode specifically targeting multiplayer networking vulnerabilities.

Selecting Network Mode

To audit multiplayer components exclusively, you invoke the skill with the network parameter. This scope selection restricts the analysis to Category 2 checks (Network and Multiplayer Security), ensuring the security‑engineer focuses on transport layer implementations, RPC handlers, and peer management rather than general code quality or single‑player logic.

Executing the Multiplayer Security Audit

The audit follows a three‑phase pipeline: context gathering, specialized agent spawning, and targeted code analysis.

Phase 1: Context Gathering from Technical Preferences

The skill automatically reads .claude/docs/technical-preferences.md to determine your selected game engine (Godot, Unity, or Unreal) and implementation language. This context dictates which networking APIs the audit targets:

• Godot: multiplayer_peer assignments and signal connections
• Unity: NetworkManager configurations and Netcode for GameObjects RPCs
• Unreal: Replication graphs and RPC security patterns

This engine detection ensures the subsequent grep patterns and validation rules match your specific networking stack.

Phase 2: Spawn the Security Engineer

The audit spawns a security‑engineer sub‑agent via a Task call, as defined in Phase 2 of the skill documentation. The agent receives:

• The network mode flag
• A manifest of source directories (src/, assets/, configuration files)
• Engine‑specific context from the technical preferences document

This sub‑agent coordinates with the Network‑Programmer specialist (.claude/agents/network-programmer.md) to apply domain‑specific security knowledge to your netcode.

Category 2: Network-Specific Code Analysis

In Category 2, the security‑engineer performs automated static analysis using targeted grep patterns across your source tree:

rg -tpy "recv|receive|PacketPeer|NetworkedMultiplayerPeer|rpc|rpc_id" src/

The scan validates:

1. Server‑Authoritative Architecture – Verifying that critical game state mutations originate from server authority rather than client assertions
2. Input Validation – Checking that inbound packets undergo validation before processing
3. Rate‑Limiting – Identifying missing throttling mechanisms on chat, movement, or action RPCs
4. Authentication Handling – Detecting plaintext token transmission or improper session management
5. Debug Endpoint Exposure – Flagging development‑only network endpoints that remain accessible in production builds

Engine-Specific Validation Guidelines

The audit cross‑references your implementation against engine‑specific security best practices documented in the framework's reference materials.

Godot Multiplayer Peer Validation

For Godot projects, the audit checks docs/engine-reference/godot/modules/networking.md to verify:

• Proper multiplayer_peer assignment before scene replication begins
• Secure signal connections to peer_connected and peer_disconnected events
• Validation of remote calls via rpc and rpc_id before execution

Unity Netcode for GameObjects

When Unity is detected, the audit validates against docs/engine-reference/unity/modules/networking.md:

• Correct NetworkManager singleton configuration
• Server‑authority enforcement on NetworkBehaviour scripts
• Secure RPC declarations using [ServerRpc] and [ClientRpc] attributes with proper permission checks

Unreal Engine Replication Security

For Unreal projects, the audit integrates with the UE Replication Specialist (.claude/agents/ue-replication-specialist.md) to verify:

• Replication conditions using DOREPLIFETIME and DOREPLIFETIME_CONDITION
• RPC reliability settings and UFUNCTION(Server, Reliable) security boundaries
• Client‑side prediction validation to prevent desync exploits

Interpreting Audit Results

Upon completion, the security‑engineer generates a markdown report at production/security/security-audit-[date].md. The report structure includes severity ratings and remediation guidance:

## Network and Multiplayer Security

| Severity | Finding                                    | Recommendation |
|----------|--------------------------------------------|----------------|
| CRITICAL | Server does not enforce authority on client‑submitted positions. | Implement server‑side validation and authoritative movement. |
| HIGH     | Lack of rate‑limiting on chat messages.    | Add token bucket or leaky‑bucket throttling. |
| MEDIUM   | Authentication token sent in plaintext over UDP. | Switch to TLS‑wrapped `NetworkedMultiplayerPeer` or use encrypted payloads. |

CRITICAL flags automatically trigger escalation protocols for any high‑severity multiplayer findings that could enable cheating, denial‑of‑service, or unauthorized access.

Pre-Launch Verification

After remediation, verify completion using the Launch‑Checklist skill (.claude/skills/launch-checklist/SKILL.md). This skill confirms networking‑specific items such as:

• Anti‑cheat measures active
• Network bandwidth within target thresholds
• Server‑authority validation implemented for all player inputs

Summary

• The Security‑Audit skill in network mode provides automated, engine‑aware multiplayer security analysis for the Claude‑Code‑Game‑Studios framework.
• The audit reads .claude/docs/technical-preferences.md to tailor checks for Godot, Unity, or Unreal networking APIs.
• A security‑engineer sub‑agent scans for server‑authority violations, packet validation gaps, and insecure RPC patterns using targeted grep searches.
• Output reports are written to production/security/security-audit-[date].md with CRITICAL flags for high‑risk vulnerabilities.
• The Launch‑Checklist skill provides final verification that multiplayer security standards are met before release.

Frequently Asked Questions

How do I initiate a multiplayer security audit from the command line?

Invoke the Security‑Audit skill with the network mode parameter to restrict analysis to multiplayer components. The skill automatically spawns the security‑engineer sub‑agent and begins scanning your src/ and assets/ directories for networking vulnerabilities.

What engine-specific networking APIs does the audit check?

The audit validates Godot's multiplayer_peer and RPC signal patterns, Unity's NetworkManager and Netcode for GameObjects RPC configurations, and Unreal's replication conditions and server RPC boundaries. The specific checks are determined by reading your .claude/docs/technical-preferences.md configuration file.

Where are the security audit reports saved?

Audit reports are generated as markdown files at production/security/security-audit-[date].md. These reports include severity ratings, specific code locations, and remediation recommendations, with CRITICAL flags highlighting vulnerabilities that must be resolved before production deployment.

Which grep patterns identify multiplayer security issues in the source code?

The security‑engineer searches for transport and RPC functions including recv, receive, PacketPeer, NetworkedMultiplayerPeer, rpc, and rpc_id to locate network entry points that require validation, rate‑limiting, and authority checks.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}