CS2_VibeSignatures: Skill for Claude Code

Find CNetworkGameServer_GetFreeClient (Agent fallback)

Locate CNetworkGameServer_GetFreeClient in the current CS2 engine2.dll or libengine2.so using IDA Pro MCP tools. The fallback must recover the concrete function called by CNetworkGameServerBase_ConnectClient on its server object; do not infer an address from an old build.

Step 0. Skip an existing output

If CNetworkGameServer_GetFreeClient.<platform>.yaml already exists as a non-empty mapping in the active artifact module directory, skip that platform. The artifact directory is separate from bin; never derive the output path from the binary root.

Step 1. Load the ConnectClient predecessor

Use /get-func-from-yaml with func_name=CNetworkGameServerBase_ConnectClient to obtain the current func_va. If it is unavailable, stop and report that the predecessor is missing.

Decompile that function with IDA Pro MCP. Confirm the first argument is the CNetworkGameServerBase/ CNetworkGameServer server object (rcx on Windows, normally rdi on Linux).

Step 2. Identify the GetFreeClient call

Find the call on the server object's connection path that returns a client pointer immediately before the server-full rejection. The semantic anchors are the error string or equivalent message containing NETWORK_DISCONNECT_REJECT_SERVERFULL and Cannot get free client, and the null check on the call result. The target has the shape:

client = sub_<current>(server, address, 0, steam_id, 0, out_buffer);
if (!client) {
    // disconnect with NETWORK_DISCONNECT_REJECT_SERVERFULL
    // log: "Cannot get free client"
}

Search the exact error text (including format-string variants), enumerate xrefs, and decompile each referencing function if necessary. Follow one caller/callee level when the allocator is outlined. Reject helpers that only log, register a command, or perform unrelated client setup. Confirm that the selected function allocates/selects a free client slot and returns a pointer or null.