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unity-ai-agent-rules

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Bu listing icin henuz AI raporu yok.

SUMMARY

Free Cursor rules + AGENTS.md that stop AI (Cursor, Claude Code, ChatGPT) from writing broken Unity C#: missing usings, invented APIs, Unity 6 vs 2022 mixups. MIT.

README.md

Unity AI Agent Rules (Free Mini)

Cursor rules and an AGENTS.md that stop the most common AI coding mistakes in Unity C#:

  • Missing or deleted using directives (the #1 cause of CS0246 after an AI edit)
  • Invented APIs (GameObject.FindByTag, transform.GetChildByName, Rigidbody.AddVelocity…)
  • Unity 6 vs 2022.3 LTS API mixups (velocity → linearVelocity, drag → linearDamping, obsolete FindObjectOfType)

Works with Cursor, Claude Code, and any agent that reads AGENTS.md. There's also a paste-in header for ChatGPT and Claude chat.

Also catches bugs that compile fine

AI writes What breaks Rule says
target?.TakeDamage(1) MissingReferenceException after Destroy. ?. can't see Unity's "fake null" Use target != null on UnityEngine.Object (full kit)
renames speed → moveSpeed Every prefab's tuned value quietly resets Add [FormerlySerializedAs("speed")] (full kit)
+= an event in Start with no -= Errors after a scene reload Subscribe in OnEnable, unsubscribe in OnDisable (full kit)

What's inside

File What it does
.cursor/rules/00-unity-core.mdc Always on. Reads ProjectVersion.txt and manifest.json first, no invented APIs, writes complete compilable files
.cursor/rules/01-namespaces-usings.mdc Keeps usings, plus a type → namespace lookup table and name-clash fixes
.cursor/rules/04-unity-versions-api.mdc 2022.3 LTS vs Unity 6 API table
AGENTS.md The same guidance for Claude Code, Codex and other agents
PRIMING_HEADER.md Paste at the start of a ChatGPT or Claude chat

Quick start (60 seconds)

git clone https://github.com/scoyoc5/unity-ai-agent-rules
cp -r unity-ai-agent-rules/.cursor unity-ai-agent-rules/AGENTS.md /path/to/YourUnityProject/

Then ask your agent: "Add a jump to PlayerController." It should read ProjectVersion.txt first and keep your using lines.

Install

  1. Copy .cursor/ and AGENTS.md into your Unity project root, next to Assets/.
  2. That's it. Cursor picks up the rules automatically. For chat tools, paste PRIMING_HEADER.md first.

Quick reference: Unity 6 vs 2022.3

Topic 2022.3 LTS Unity 6
Rigidbody velocity rb.velocity rb.linearVelocity
Drag rb.drag, rb.angularDrag rb.linearDamping, rb.angularDamping
Find objects FindFirstObjectByType<T>() same (FindObjectOfType obsolete)
Async Coroutines Coroutines or Awaitable

Want the full kit? 🎃 25% off in the itch.io Halloween Sale (Oct 25 – Nov 4)

The Unity AI Agent Kit adds lifecycle, serialization, Input System, performance and test rules, a CLAUDE.md, a phased feature-planning workflow with templates, 20 task prompts (controllers, save/load, FSM, inventory, pooling, UI…), and a batchmode compile + EditMode test loop.
👉 Get it on itch.io ($12 suggested, $9 minimum)

Contributing

Seen an AI invent a Unity API? Open an issue with the fake call and the real one, and I'll add it to the list.

License

MIT. Not affiliated with or endorsed by Unity Technologies, Anysphere (Cursor), or Anthropic.

Keywords: cursor rules for unity, .cursorrules unity, claude code unity, CLAUDE.md unity, AGENTS.md unity, chatgpt unity c#, unity 6 linearVelocity, CS0246 AI.

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