What is find-CServerSideClientBase_GetUserIDString?

A fallback procedure for finding a specific user-ID formatting function inside compiled game engine files with IDA. IDA is a reverse-engineering tool for inspecting compiled programs when source code is unavailable.

Use it to inspect engine2.dll or libengine2.so, identify the correct CServerSideClientBase function, and write a platform-specific YAML artifact when needed.

It provides a method when the normal automatic search cannot resolve the function. It helps avoid confusing the target with nearby network, replay, or console-related functions.

find-CServerSideClientBase_GetUserIDString

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add HLND2T/CS2_VibeSignatures --skill find-cserversideclientbase_getuseridstring

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring/github.svg)](https://agentmods.dev/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring)

Your own site

<a href="https://agentmods.dev/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring"><img src="https://agentmods.dev/badge/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring"><img src="https://agentmods.dev/badge/skills/hlnd2t/cs2_vibesignatures/find-cserversideclientbase_getuseridstring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 749 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 warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Excessive Agency · line 41
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00078	$0.00749
Opus 5.5	$0.00031	$0.00300
Sonnet 5.5	$0.00016	$0.00150
Haiku 4.5	$0.00008	$0.00075

Measured 2mo ago against content hash 8b10854980df, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

find-CServerSideClientBase_GetUserIDString 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 2mo 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-CServerSideClientBase_GetUserIDString/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Find CServerSideClientBase_GetUserIDString (Agent fallback)

Use this fallback only after ida_preprocessor_scripts/find-CServerSideClientBase_GetUserIDString.py fails. The target is the CServerSideClientBase member that returns/formats a client's user-ID string; it is not the nearby network-ID helper, HLTV/replay formatter, or a console command.

Step 0. Skip an existing output

If CServerSideClientBase_GetUserIDString.<platform>.yaml already exists as a non-empty mapping in the active artifact module directory, skip it. Never derive the artifact path from bin or write into checkout expected artifacts while analyzing.

Step 1. Locate the target in IDA

Search the current binary for exact string literals matching the user-ID fallback values:

STEAM_ID_LAN
STEAM_ID_PENDING
HLTV
REPLAY
UNKNOWN

Enumerate code xrefs and decompile candidate functions. Prefer the function whose first argument is the CServerSideClientBase object (rcx on Windows, normally rdi on Linux) and which returns or writes the formatted user ID. The deterministic finder intentionally excludes unrelated matches such as %.3f min, for %.2f minutes, removeid: couldn't find %s, FULLMATCH:%s %s, and banid 0 %s.

Confirm the candidate's semantics: it reads the client's identity/auth state, selects a fallback such as STEAM_ID_LAN, STEAM_ID_PENDING, HLTV, REPLAY, or UNKNOWN, and returns the resulting string (or a pointer to it). Reject functions that only produce the network ID, register a command, or log a diagnostic. The old build-14167 values are orientation only; do not copy an address without checking the current binary.

Step 2. Generate and write the artifact

Rename the verified function with IDA MCP. Use /generate-signature-for-function to generate a unique signature from the current function body, then use /write-func-as-yaml with:

func_name=CServerSideClientBase_GetUserIDString
verified current func_addr
func_rva relative to the current image base
current func_size
validated func_sig

Read the full file on GitHub · 68 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.

2mo ago First seen · 68 lines · 78 tokens per session scan A 8b10854980df

Subscribe to this mod's changes

find-CServerSideClientBase_GetUserIDString is a skill published in the GitHub repository HLND2T/CS2_VibeSignatures (67 stars, last pushed today), licensed MIT. It adds 78 tokens to every session and 749 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-06.

Debugging

find-CServerSideClientBase_GetUserIDString next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
find-CServerSideClientBase_GetUserIDStringHLND2T/CS2_VibeSignatures	Skill	67	today	MIT	A	78	Claude Code
systematic-debuggingopen-metadata/OpenMetadata	Skill	16k	yesterday	Apache-2.0	A	37	Claude Code
log-error-digestzebbern/claude-code-guide	Skill	4.7k	3d ago	MIT	A	71	Claude Code, Codex
cwv-optimizeradobe/skills	Skill	319	yesterday	Apache-2.0	A	112	Claude Code
ci-fixersipyourdrink-ltd/bernstein	Skill	1.2k	yesterday	Apache-2.0	A	15	Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skills	Skill	1.9k	23d ago	MIT	A	36	Claude Code
triaging-web-analytics-supportPostHog/posthog	Skill	41k	yesterday	none	A	151	Claude Code, Codex