get-vtable-from-yaml

Name: get-vtable-from-yaml
Author: HLND2T

58stars10forks

How to install get-vtable-from-yaml?

hlnd2t/cs2_vibesignatures/get-vtable-from-yaml

$npx -y skills add HLND2T/CS2_VibeSignatures --skill get-vtable-from-yaml

Installs into the current project.

Summary

Load vtable information from a pre-generated YAML file. Use this skill when you need to get vtable address and size for a class before analyzing virtual functions. This skill checks for existing vtable YAML files and errors out if not found, ensuring the vtable analysis has been

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SKILL.md

1	# Get VTable from YAML
2
3	Load vtable information from a pre-generated `{class_name}_vtable.{platform}.yaml` file beside the binary.
4
5	## Parameters
6
7	- `class_name`: The class name to look up (e.g., `CCSPlayerController`, `CCSPlayer_WeaponServices`, `CServerSideClient`)
8
9	## Method
10
11	### 1. Check and Load VTable YAML
12
13	Run the following code with the appropriate `class_name`:
14
15	```python
16	mcp__ida-pro-mcp__py_eval code="""
17	import idaapi
18	import os
19
20	class_name = "<CLASS_NAME>" # Replace with actual class name
21
22	input_file = idaapi.get_input_file_path()
23	dir_path = os.path.dirname(input_file)
24	platform = 'windows' if input_file.endswith('.dll') else 'linux'
25
26	yaml_path = os.path.join(dir_path, f"{class_name}_vtable.{platform}.yaml")
27
28	if os.path.exists(yaml_path):
29	with open(yaml_path, 'r', encoding='utf-8') as f:
30	print(f.read())
31	print(f"YAML_EXISTS: True")
32	else:
33	print(f"ERROR: Required file {class_name}_vtable.{platform}.yaml not found.")
34	"""
35	```
36
37	### 2. Handle Result
38
39	If YAML exists (`YAML_EXISTS: True`), extract these values from the output:
40	- `vtable_va`: The vtable virtual address (use as `<VTABLE_START>`)
41	- `vtable_rva`: The vtable relative virtual address
42	- `vtable_size`: The vtable size in bytes
43	- `vtable_numvfunc`: The valid vtable entry count (last valid index = count - 1)
44	- `vtable_entries`: An array of virtual functions starting from vtable[0].
45
46	Example YAML content:
47	```yaml
48	vtable_class: CCSPlayerController
49	vtable_symbol: _ZTV19CCSPlayerController
50	vtable_va: 0x221fc80
51	vtable_rva: 0x221fc80
52	vtable_size: 0xd60
53	vtable_numvfunc: 428
54	vtable_entries:
55	- 0x9b4bb0
56	- 0x9b4bc0
57	- 0x9b4bd0
58	```
59
60	If YAML does NOT exist, ERROR OUT and report to user:
61	```
62	ERROR: Required file {class_name}_vtable.{platform}.yaml not found.
63	Please run `/write-vtable-as-yaml` with class_name={class_name} first to generate the vtable YAML file.
64	```
65	Do NOT proceed with any remaining steps in the calling skill.
66
67	## Usage in Other Skills
68
69	When a skill needs vtable information, use this skill first:
70
71	```markdown
72	### 1. Get {ClassName} VTable Address
73
74	ALWAYS Use SKILL `/get-vtable-from-yaml` with `class_name={ClassName}`.
75
76	If the skill returns an error, stop and report to user.
77	Otherwise, extract `vtable_va`, `vtable_numvfunc` and `vtable_entries` for subsequent steps.
78	```
79
80	## Expected Output Values
81
82	\| Field \| Description \| Example \|
83	\|-------\|-------------\|---------\|
84	\| `vtable_class` \| Class name \| `CCSPlayerController` \|
85	\| `vtable_va` \| Virtual address of vtable \| `0x2114cd0` \|
86	\| `vtable_rva` \| Relative virtual address \| `0x2114cd0` \|
87	\| `vtable_size` \| Size in bytes \| `0xd60` \|
88	\| `vtable_numvfunc` \| Number of virtual functions \| `428` \|
89	\| `vtable_entries` \| An array of virtual functions starting from vtable[0] \| ... \|

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get-vtable-from-yaml

58stars10forks

View on GitHub

How to install get-vtable-from-yaml?

hlnd2t/cs2_vibesignatures/get-vtable-from-yaml

$npx -y skills add HLND2T/CS2_VibeSignatures --skill get-vtable-from-yaml

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Get VTable from YAML
2
3	Load vtable information from a pre-generated `{class_name}_vtable.{platform}.yaml` file beside the binary.
4
5	## Parameters
6
7	- `class_name`: The class name to look up (e.g., `CCSPlayerController`, `CCSPlayer_WeaponServices`, `CServerSideClient`)
8
9	## Method
10
11	### 1. Check and Load VTable YAML
12
13	Run the following code with the appropriate `class_name`:
14
15	```python
16	mcp__ida-pro-mcp__py_eval code="""
17	import idaapi
18	import os
19
20	class_name = "<CLASS_NAME>" # Replace with actual class name
21
22	input_file = idaapi.get_input_file_path()
23	dir_path = os.path.dirname(input_file)
24	platform = 'windows' if input_file.endswith('.dll') else 'linux'
25
26	yaml_path = os.path.join(dir_path, f"{class_name}_vtable.{platform}.yaml")
27
28	if os.path.exists(yaml_path):
29	with open(yaml_path, 'r', encoding='utf-8') as f:
30	print(f.read())
31	print(f"YAML_EXISTS: True")
32	else:
33	print(f"ERROR: Required file {class_name}_vtable.{platform}.yaml not found.")
34	"""
35	```
36
37	### 2. Handle Result
38
39	If YAML exists (`YAML_EXISTS: True`), extract these values from the output:
40	- `vtable_va`: The vtable virtual address (use as `<VTABLE_START>`)
41	- `vtable_rva`: The vtable relative virtual address
42	- `vtable_size`: The vtable size in bytes
43	- `vtable_numvfunc`: The valid vtable entry count (last valid index = count - 1)
44	- `vtable_entries`: An array of virtual functions starting from vtable[0].
45
46	Example YAML content:
47	```yaml
48	vtable_class: CCSPlayerController
49	vtable_symbol: _ZTV19CCSPlayerController
50	vtable_va: 0x221fc80
51	vtable_rva: 0x221fc80
52	vtable_size: 0xd60
53	vtable_numvfunc: 428
54	vtable_entries:
55	- 0x9b4bb0
56	- 0x9b4bc0
57	- 0x9b4bd0
58	```
59
60	If YAML does NOT exist, ERROR OUT and report to user:
61	```
62	ERROR: Required file {class_name}_vtable.{platform}.yaml not found.
63	Please run `/write-vtable-as-yaml` with class_name={class_name} first to generate the vtable YAML file.
64	```
65	Do NOT proceed with any remaining steps in the calling skill.
66
67	## Usage in Other Skills
68
69	When a skill needs vtable information, use this skill first:
70
71	```markdown
72	### 1. Get {ClassName} VTable Address
73
74	ALWAYS Use SKILL `/get-vtable-from-yaml` with `class_name={ClassName}`.
75
76	If the skill returns an error, stop and report to user.
77	Otherwise, extract `vtable_va`, `vtable_numvfunc` and `vtable_entries` for subsequent steps.
78	```
79
80	## Expected Output Values
81
82	\| Field \| Description \| Example \|
83	\|-------\|-------------\|---------\|
84	\| `vtable_class` \| Class name \| `CCSPlayerController` \|
85	\| `vtable_va` \| Virtual address of vtable \| `0x2114cd0` \|
86	\| `vtable_rva` \| Relative virtual address \| `0x2114cd0` \|
87	\| `vtable_size` \| Size in bytes \| `0xd60` \|
88	\| `vtable_numvfunc` \| Number of virtual functions \| `428` \|
89	\| `vtable_entries` \| An array of virtual functions starting from vtable[0] \| ... \|

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