Forge Mind

ForgeMind — Claude AI Inside the Unity Editor

If you've spent any time developing in Unity, you know the drill: hit a problem, alt-tab to a browser, explain your entire project from scratch to get a half-useful answer, manually copy the code back, repeat. ForgeMind cuts that loop short.

It embeds Claude directly into the Unity Editor as a dockable window. Ask questions, generate scripts, diagnose errors, and analyze your project — without leaving the editor once.

Features at a Glance

• ✅ Streaming responses — watch answers appear word by word
• ✅ Markdown rendering — bold, headers, bullet lists, syntax-highlighted code
• ✅ Up to 4 context slots — attach scripts, errors, hierarchy, and ScriptableObjects simultaneously
• ✅ Project Memory — permanent project knowledge Claude always applies
• ✅ Project Snapshot — full project awareness in one click
• ✅ Architecture diagram — interactive IMGUI node graph + Mermaid export
• ✅ Performance Audit — 15+ Unity-specific antipattern checks
• ✅ Diff viewer — see every change before applying
• ✅ Play Mode live editing — modify component fields while the game runs
• ✅ Session history with auto-tagging and search
• ✅ Export conversations to Markdown
• ✅ Three Claude models — Haiku (fast/cheap), Sonnet (balanced), Opus (powerful)
• ✅ Token tracking and cost estimates
• ✅ Prompt injection safeguards on all memory injection
• ✅ No subscription — pay only for your own API usage

How it actually works

You bring your own Anthropic API key. ForgeMind connects directly to Claude on your behalf — no middleman, no monthly subscription on top of what you're already paying. Most active dev days run under a dollar. You pick the model: Haiku if you're iterating fast and want near-instant responses, Sonnet for the everyday balance of quality and cost, or Opus when you're deep in a hard architectural problem and need it to actually think.

Beginner Friendly

New to AI tools? ForgeMind includes a first-run walkthrough, plain-English error messages, and tooltips on every single button. Start asking questions in under 2 minutes.

What it does well

For people newer to Unity: ForgeMind is the first place to ask when something breaks and the error message makes no sense. Paste the console error directly into a context slot and ask what's wrong. It'll explain it in plain English and give you working code to fix it. There's a walkthrough on first run, and every button has a tooltip — you won't be staring at a blank interface wondering what to do.

For experienced devs: The Context Slots are the main event. Load up to four assets simultaneously — a script, a ScriptableObject, a scene hierarchy export, whatever's relevant — and Claude actually sees your code, not a description of it. Project Memory lets you store permanent facts about your architecture once and stop re-explaining your patterns on every session. The Project Snapshot builds full awareness of your entire asset structure in one click and can generate an interactive architecture diagram showing how your systems connect.

The Performance Auditor is worth calling out specifically. It scans your scripts for Unity antipatterns — GetComponent calls in Update loops, uncached coroutines, missing Physics layer masks, Debug.Log left in builds — and flags them with specific fixes, not generic advice.

The diff viewer shows you exactly what Claude wants to change before you apply anything. One-click save to your project when you're satisfied.

Other stuff worth knowing

• Play Mode live editing — select any GameObject while the game is running and tweak component values in real time. Useful for tuning enemy behavior or camera feel without constant stop/start cycles.
• Every conversation persists through Unity recompiles and editor restarts. Sessions are auto-tagged and searchable, so you can find a solution you worked out three weeks ago.
• Streaming responses, full Markdown rendering with syntax-highlighted code blocks, token tracking so you can see exactly what each conversation costs.

Requirements

• Unity 2021.3 LTS or newer
• Anthropic API key (create one free at console.anthropic.com)
• Internet connection
• Compatible with URP, HDRP, and Built-in render pipelines. No extra packages needed

Streaming responses — watch answers appear word by word

Markdown rendering — bold, headers, bullet lists, syntax-highlighted code

Up to 4 context slots — attach scripts, errors, hierarchy, and ScriptableObjects simultaneously

Project Memory — permanent project knowledge Claude always applies

Project Snapshot — full project awareness in one click

Architecture diagram — interactive IMGUI node graph + Mermaid export

Performance Audit — 15+ Unity-specific antipattern checks

Diff viewer — see every change before applying

Play Mode live editing — modify component fields while the game runs

Session history with auto-tagging and search

Export conversations to Markdown

Three Claude models — Haiku (fast/cheap), Sonnet (balanced), Opus (powerful)

Token tracking and cost estimates

Prompt injection safeguards on all memory injection

No subscription — pay only for your own API usage

Powered by Anthropic's Claude API. Not affiliated with or endorsed by Anthropic or Unity Technologies.