fivem-security
Trigger: security, anti-cheat, exploit, secure events, validate client data, server authority, distance check, rate limit, review server code. Harden FiveM net events and server-side validation.
- Installs
- 494
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/germanfndez/fiveai-skills --skill fivem-security- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads fivem-security automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
FiveM Security
Activation Contract
Load for any net event handler, code granting money, items, vehicles or permissions, admin commands, ban logic, or questions about cheats, exploits or hardening.
Hard Rules
- Never trust the client. The client REQUESTS; the server DECIDES from its own config and state.
- Never accept prices, amounts, rewards or item names from the client. Derive them server-side.
GetInvokingResource()is nil for every net event crossing the network, player or cheater alike. NOT auth.RegisterNUICallbackis NOT authenticated: a cheater POSTs to any endpoint. Never the only gate beforeTriggerServerEvent.- Distance-check server-side:
#(GetEntityCoords(GetPlayerPed(source)) - target), ~10 units. - Re-verify state server-side (job, item, cooldown) even if the client checked.
- Rate-limit critical events; clear per-source state in
playerDropped. - Filter native game events (
weaponDamageEvent,startProjectileEvent,removeAllWeaponsEvent,ptFxEvent) withAddEventHandler+CancelEvent(). - Authorize admin actions with ACE only:
IsPlayerAceAllowed(source, object). Never an identifier list. - Key persistent data on
license:.steam:is absent for non-Steam launches. - The sandbox blocks writes outside the resource's own folder,
os.executeandio.tmpfile(). - Log rejections. Escalate on counts, never auto-ban on one hit.
Decision Gates
| Situation | Reference |
|---|---|
| Client-sent price, amount, or any argument | rules/events.md |
| Repeated or spammable event | rules/rate-limiting.md |
| Damage, projectile, weapon strip, particles | rules/net-game-events.md |
| Admin command or admin-only event | rules/ace-permissions.md |
| Ban, whitelist, persistent record | rules/identifiers.md |
| Resource writes files or spawns processes | rules/sandbox.md |
| Hardening the server itself | rules/server-convars.md |
Execution Steps
- List every net event and NUI callback and the state each changes.
- Strip client values the server can compute itself.
- Add type/range, distance and state checks at the top; return early.
- Cooldown or token-bucket anything spammable; clean up on drop.
- Gate admin paths behind
IsPlayerAceAllowed. - Add game event filters for damage, projectiles, weapons.
- Log rejections with name and source id.
Output Contract
Return hardened handler(s) with validation, distance, ACE and state checks first; name the client parameters removed; include required server.cfg lines.
References
- rules/events.md — handlers, distance, NUI callbacks.
- rules/net-game-events.md — game event payloads, cancelling.
- rules/ace-permissions.md — principals, objects, ACE guards.
- rules/rate-limiting.md — cooldowns, token buckets, cleanup.
- rules/identifiers.md —
license:, tokens, deferrals. - rules/sandbox.md — filesystem, process, convar limits.
- rules/server-convars.md — hardening convars.
Upstream docs: https://docs.fivem.net/docs/scripting-manual/
FAQ
What does the fivem-security skill do?
Trigger: security, anti-cheat, exploit, secure events, validate client data, server authority, distance check, rate limit, review server code. Harden FiveM net events and server-side validation.
How do I install fivem-security?
Run npx skills add https://github.com/germanfndez/fiveai-skills --skill fivem-security in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/fivem-security/ (personal) or .claude/skills/fivem-security/ (project).
Which AI agents can use fivem-security?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is fivem-security safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains fivem-security?
It is published by germanfndez in germanfndez/fiveai-skills. It has 494 recorded installs.
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