CS2_VibeSignatures: Skill for Claude Code

.claude/skills/find-CNetworkGameServerBase_CheckTimeouts-decompiles/SKILL.md

find-CNetworkGameServerBase_CheckTimeouts-decompiles is a skill for Claude Code from HLND2T/CS2_VibeSignatures. It costs 163 tokens per session (1,591 once invoked), scanned A, original, MIT.

A reverse-engineering procedure for locating a specific virtual function in Counter-Strike 2 engine binaries using IDA Pro, a tool for inspecting compiled programs.

In plain words
What is it for?
It decompiles the function that checks server timeouts, identifies the virtual-call slot for the server's spectator-status check, and records a signature for that call.
Why use it?
It helps find the correct function call when addresses and layouts differ between Windows and Linux builds.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

This is HLND2T/CS2_VibeSignatures's own configuration. It tells Claude Code how to work on CS2_VibeSignatures itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CS2_VibeSignatures configures →

Reuse

Borrowing it

Nothing to install: this file belongs to HLND2T/CS2_VibeSignatures. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/HLND2T/CS2_VibeSignatures/main/.claude/skills/find-CNetworkGameServerBase_CheckTimeouts-decompiles/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/HLND2T/CS2_VibeSignatures

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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Per session 163 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00163 $0.01591
Opus 5 $0.00081 $0.00796
Sonnet 5 $0.00033 $0.00318
Haiku 4.5 $0.00016 $0.00159

Measured 10d ago against content hash 326402aeacc5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

find-CNetworkGameServerBase_CheckTimeouts-decompiles scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/find-CNetworkGameServerBase_CheckTimeouts-decompiles/SKILL.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Find CNetworkGameServerBase_IsHLTV (Agent fallback)

Locate the CNetworkGameServerBase_IsHLTV virtual function in CS2 engine2.dll / libengine2.so using IDA Pro MCP tools. This is the Agent fallback for the find-CNetworkGameServerBase_CheckTimeouts-decompiles preprocessor: it runs only when the preprocessor script returned failure. It reproduces the LLM_DECOMPILE step by hand — collecting the virtual-call reference to IsHLTV inside its caller CNetworkGameServerBase_CheckTimeouts.

The output is a virtual dispatch (found_vcall): the YAML records the vtable slot and a vfunc_sig that pins the call instruction. There is no concrete implementation address — do not resolve or emit func_va.

Realworld Function Reference

Read the platform-relevant reference YAML before searching in IDA. It provides concrete disassembly, decompiler output, and the annotated call site. Treat its addresses and offsets as reference-build values only; verify every result against the current binary.

  • Windows: ida_preprocessor_scripts/references/engine/CNetworkGameServerBase_CheckTimeouts.windows.yaml
  • Linux: ida_preprocessor_scripts/references/engine/CNetworkGameServerBase_CheckTimeouts.linux.yaml

Background — where IsHLTV is called

CNetworkGameServerBase_CheckTimeouts(this) loops over connected clients. For each timed-out client it decides how to disconnect. In that decision it makes a virtual call on the server object itself to test whether the server is an HLTV/relay server:

// Linux reference (offset 0x258)
if ( !(*(unsigned __int8 (__fastcall **)(__int64))(*(_QWORD *)a1 + 600LL))(a1)   // IsHLTV(this)
     && g_pSource2Server
     && ... )
// Windows reference (offset 0x230)
if ( !(*(unsigned __int8 (__fastcall **)(__int64))(*(_QWORD *)a1 + 560LL))(a1) ) // IsHLTV(this)

IsHLTV takes only this and returns a bool. When it returns false the routine takes the g_pSource2Server "server-decided timeout" path. That semantic role — the vcall on the server object whose negated result gates the g_pSource2Server branch — is the anchor, not the raw offset, which changes across updates.

Read the full file on GitHub · 128 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 128 lines · 163 tokens per session scan A 326402aeacc5

Subscribe to this mod's changes

find-CNetworkGameServerBase_CheckTimeouts-decompiles is a skill published in the GitHub repository HLND2T/CS2_VibeSignatures (65 stars, last pushed today), licensed MIT. It adds 163 tokens to every session and 1,591 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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