CS2_VibeSignatures: Skill for Claude Code

Find CNetworkMessages_GetNetworkSerializationContextData

Locate CNetworkMessages_GetNetworkSerializationContextData vfunc in CS2 networksystem.dll or libnetworksystem.so using IDA Pro MCP tools.

Method

1. Load CNetworkMessages_SetNetworkSerializationContextData from YAML

ALWAYS Use SKILL /get-func-from-yaml with func_name=CNetworkMessages_SetNetworkSerializationContextData.

If the skill returns an error, STOP and report to user.

Otherwise, extract:

• vfunc_index
• vfunc_offset

2. Load CNetworkMessages VTable from YAML

ALWAYS Use SKILL /get-vtable-from-yaml with class_name=CNetworkMessages.

If the skill returns an error, STOP and report to user.

Otherwise, extract:

• vtable_numvfunc
• vtable_entries

3. Resolve the Adjacent Getter Slot

Compute the candidate slot for CNetworkMessages_GetNetworkSerializationContextData:

• target_vfunc_index = CNetworkMessages_SetNetworkSerializationContextData.vfunc_index + 1
• target_vfunc_offset = CNetworkMessages_SetNetworkSerializationContextData.vfunc_offset + 8

Validate that target_vfunc_index < vtable_numvfunc, then read:

• candidate_func_addr = CNetworkMessages_vtable[target_vfunc_index]

This adjacent-slot rule is required because GetNetworkSerializationContextData immediately follows SetNetworkSerializationContextData in the CNetworkMessages vtable for networksystem.dll / libnetworksystem.so.

4. Decompile the Getter Candidate

Decompile the resolved adjacent entry:

mcp__ida-pro-mcp__decompile addr="<candidate_func_addr>"

Confirm the candidate matches the network-serialization-context getter pattern.

Expected behavior:

1. Takes (this, key_name) arguments
2. Uses an internal lock around the lookup
3. Looks up key_name from the internal symbol table owned by CNetworkMessages
4. Returns the resolved 16-bit context value, or 0xFFFF / -1 when not found

Windows example shape:

__int64 __fastcall CNetworkMessages_GetNetworkSerializationContextData(..., __int64 key_name)
{
  AcquireSRWLockExclusive(...);
  CUtlSymbolTable::Find(..., key_name);
  ...
  ReleaseSRWLockExclusive(...);
  return ...;
}