Get Func From Yaml

Get Function from YAML

Load function information from a pre-generated {func_name}.{platform}.yaml file beside the binary.

Parameters

• func_name: The function name to look up (e.g., CBaseModelEntity_SetModel, CCSPlayerController_ChangeTeam, CEntityInstance_AcceptInput)

Method

1. Check and Load Function YAML

Run the following code with the appropriate func_name:

mcp__ida-pro-mcp__py_eval code="""
import idaapi
import os

func_name = ""  # Replace with actual function name

input_file = idaapi.get_input_file_path()
dir_path = os.path.dirname(input_file)
platform = 'windows' if input_file.endswith('.dll') else 'linux'

yaml_path = os.path.join(dir_path, f"{func_name}.{platform}.yaml")

if os.path.exists(yaml_path):
    with open(yaml_path, 'r', encoding='utf-8') as f:
        print(f.read())
    print("FUNC_YAML_EXISTS: True")
else:
    print(f"ERROR: Required file {func_name}.{platform}.yaml not found.")
"""

2. Handle Result

If YAML exists (FUNC_YAML_EXISTS: True), extract available values from the output:

• func_name: Function name (if present)
• func_va: Function virtual address (if present)
• func_rva: Function relative virtual address (if present)
• func_size: Function size in bytes (if present)
• func_sig: Function signature bytes (if present)
• vtable_name: Related vtable class name (optional, virtual-function YAML only)
• vfunc_offset: Offset from vtable start (optional, virtual-function YAML only)
• vfunc_index: Index in vtable (optional, virtual-function YAML only)

Example YAML content:

func_name: CCSPlayerController_Respawn
func_va: 0x180A8CA10
func_rva: 0xA8CA10
func_size: 0x3F
func_sig: 41 B8 80 00 00 00 48 8D 99 10 05 00 00
vtable_name: CCSPlayerController
vfunc_offset: 0x330
vfunc_index: 102

If some fields are missing, use only the fields that exist in YAML and do not fabricate values.

If YAML does NOT exist, ERROR OUT and report to user:

ERROR: Required file {func_name}.{platform}.yaml not found.
Please run `/write-func-as-yaml` with func_name={func_name} first.
For virtual functions, `/write-vfunc-as-yaml` is also acceptable.

Do NOT proceed with any remaining steps in the calling skill.

Usage in Other Skills

When a skill needs function information, use this skill first:

### 1. Get {FuncName} Function Info

**ALWAYS** Use SKILL `/get-func-from-yaml` with `func_name={FuncName}`.

If the skill returns an error, stop and report to user.
Otherwise, extract `func_va`, `func_sig`, and other available fields for subsequent steps.

Example Output

| Field | Description | Example | |-------|-------------|---------| | func_name | Function name | CCSPlayerController_Respawn | | func_va | Virtual address of function (optional in some virtual-function YAML) | 0x180A8CA10 | | func_rva | Relative virtual address (optional) | 0xA8CA10 | | func_size | Function size in bytes (optional) | 0x3F | | func_sig | Byte signature (optional) | 41 B8 80 00 00 00 ... | | vtable_name | Related class name for virtual function (optional) | CCSPlayerController | | vfunc_offset | Offset from vtable start (optional) | 0x330 | | vfunc_index | Index in vtable (optional) | 102 |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: HLND2T
• Source: HLND2T/CS2_VibeSignatures
• License: MIT

Install and usage instructions live in the source repository linked above.