Forge GUI: What It Means and the Best Options for Each Forge (2026)

"Forge GUI" has no single answer, because at least eight unrelated products are called Forge: for some of them the GUI is the whole product, for some there is no official GUI at all, and for one it is an API you write against. Work out which Forge you mean first. The right option follows from that.

This guide sorts the eight, says what a Forge GUI is (or is not) for each as of October 20, 2026, and points you to the best option. Most developers who search "forge gui" or "forgegui" are running a terminal tool, either the ForgeCode AI coding agent or Foundry's forge, and want to see their work in something better than a terminal. If that is you, the second half of this page is for you, and the companion guide on visual interfaces for terminal AI coding agents goes deeper.

TL;DR: what "Forge GUI" means

• ForgeCode (AI coding agent): the open-source CLI has no GUI. Its homepage now pitches a separate hosted "software factory" with a board UI, available by demo.
• ForgeGUI.com: an AI tool that generates game UI and assets. The product is the GUI.
• Card-Forge: an open-source Magic: The Gathering rules engine whose desktop client is literally forge-gui-desktop.
• Foundry forge: a command-line Solidity toolchain with no official GUI.
• Minecraft Forge: "GUI" means Screens, which you build in your mod.
• Stable Diffusion WebUI Forge, Atlassian Forge, Forgejo and Gitea: each has its own UI story, covered below.
• For code written by a terminal agent, the most useful Forge GUI is a review surface. Macroscope reviews every GitHub pull request and runs the same review from your terminal.

Which Forge do you mean? The Forge GUI answer for each

Here is the short answer for all eight Forges. Each Forge has its own section below.

Forge	What it is	Is there a GUI?
ForgeCode	Terminal AI coding agent	Not for the CLI
ForgeGUI.com	AI game asset generator	Yes, it is the product
Card-Forge	Magic: The Gathering rules engine	Yes, desktop and Android
Foundry forge	Solidity build and test tool	No official GUI
Minecraft Forge	Minecraft mod loader	You build Screens
SD WebUI Forge	Stable Diffusion web UI	Yes, it is a web UI
Atlassian Forge	Jira and Confluence app platform	CLI, plus UI Kit for apps
Forgejo, Gitea	Self-hosted git forges	Yes, the web UI

If you typed "forgegui" as one word, the most likely matches are ForgeGUI.com, the game asset tool, and Card-Forge, whose desktop module is named forge-gui-desktop.

Is there a Forge GUI for ForgeCode, the AI coding agent?

Not for the open-source CLI. ForgeCode, from Tailcall, is a terminal AI coding agent written in Rust and licensed Apache-2.0, and its README positions it as working "right in your terminal." It has an interactive terminal UI, a one-shot -p mode and a ZSH plugin that sends : lines to the agent. It is under active development, with release v2.14.0 on October 1, 2026, and the README documents no desktop app, web interface or IDE extension.

What has changed in 2026 is the ForgeCode homepage. forgecode.dev now leads with a hosted "software factory": triggers from Slack, GitHub, Sentry, Linear, forums or a prompt become tested changes on a board, running in ForgeCode's cloud or your own. The product shots are board-style, but the page lists no pricing and offers a demo rather than a download. Treat it as a separate product from the CLI.

So the practical options for ForgeCode users today are:

• Stay in the terminal and use the TUI.
• Ask Tailcall about the hosted factory if a team board is what you want.
• Use a visual review surface for what the agent produces, which is the GitHub pull request. More on that below.

For the full landscape of GUIs for terminal coding agents, including Claude Code's desktop app, Codex, Agent Client Protocol editors and multi-agent managers, see Forge GUI: visual interfaces for terminal AI coding agents.

What is ForgeGUI.com?

ForgeGUI.com is an AI tool for game developers, and its Forge GUI is the product itself. You describe what you want in a chat and it generates "thumbnails, icons, GUI sets, GFX, and more": inventory panels, HUD elements, health bars, skill icons and buttons, plus 3D assets. It exports PNGs, ZIPs and GLBs and lists Roblox Studio, UEFN, Unity, Unreal Engine and Minecraft among supported targets, with a ForgeMCP route into Roblox Studio.

There is a free tier with starter credits and paid plans with more credits. Users keep commercial rights to what they generate. "GUI" here means game interface art. It has nothing to do with coding agents or code review, so if this is the Forge you wanted, you are done.

Card-Forge and the forge-gui-desktop download

Card-Forge is an open-source, unofficial rules engine for Magic: The Gathering, and its graphical client ships as forge-gui-desktop. That module name is the source of many "forgegui" searches. The project is written in Java, licensed GPL-3.0 and independent of Wizards of the Coast. It runs on Windows, Mac, Linux and Android, with iOS at an early stage, and includes Adventure Mode, Quest Mode and AI formats such as Sealed, Draft, Commander and Cube.

To get the Forge GUI for Card-Forge:

1. Install Java 17 or later.
2. Download the latest release from the project's GitHub releases page, or get the forge-gui-desktop tarball from the daily snapshot build for the newest cards and fixes.
3. Extract to a new folder to avoid version conflicts. Player data is preserved on upgrade.

Android users install the APK from the snapshot build (Android 11 and at least 6 GB of RAM).

Is there a Forge GUI for Foundry?

No official one. Foundry's forge "compiles, tests, and deploys Solidity smart contracts," and the documentation presents it entirely through commands: forge build, forge test, forge script and forge verify-contract. It covers fuzz, invariant and fork testing, gas reports, traces and a debugger, all from the terminal.

Foundry's documentation describes no official GUI. If you use a third-party wrapper, treat it with the same caution you would apply to a wallet extension, because forge signs and deploys contracts.

If what you want from a Foundry Forge GUI is a better way to review changes before they ship, that is the same need ForgeCode users have. Solidity changes go through pull requests like any other code, and an AI code reviewer posting into the pull request gives you the visual layer. That is covered below.

Minecraft Forge GUI: Screens, not a download

In Minecraft Forge, a GUI is something you build into your mod. The Forge documentation describes Screens as "typically the base of all Graphical User Interfaces (GUIs) in Minecraft," responsible for "taking in user input, verifying it on the server, and syncing the resulting action back to the client." Screens can be paired with menus for inventory-style views or used on their own with custom networking.

So "Minecraft Forge GUI" tutorials teach you to write Screens for your mod. Check that the tutorial matches your Minecraft version, because the docs are versioned (1.19.x through 1.21.x) and rendering APIs change between releases.

Stable Diffusion WebUI Forge: already a GUI

Stable Diffusion WebUI Forge is a GUI, so there is nothing to add. It is a platform built on top of AUTOMATIC1111's Stable Diffusion WebUI by the GitHub user lllyasviel, aimed at easier development, better resource management and faster inference. It uses Gradio, is licensed AGPL-3.0 and is currently based on SD-WebUI 1.10.1. Its name is a nod to Minecraft Forge.

The README notes that the project is "under some constructions" and that its component status table was last updated in September 2024, so check the issue tracker before you rely on a specific feature. Install instructions are in the GitHub repository.

Atlassian Forge: a CLI with UI frameworks for apps

Atlassian Forge is a serverless platform for building Jira and Confluence apps, and you drive it from the Forge CLI. There is no separate Forge GUI for development. For the apps themselves, Atlassian offers two options: UI Kit, with pre-built components that "match the look and feel of Atlassian apps," and Custom UI, where you supply your own HTML, CSS and JavaScript.

Git forges: Forgejo and Gitea

For a software forge such as Forgejo or Gitea, the web interface is the GUI. In this sense a forge is the whole hosting platform: repositories, issues, pull requests and CI. You get the GUI by pointing a browser at your instance.

What Forge GUI do developers actually need for agent-written code?

If you run a terminal coding agent, the GUI that matters most is not a window around the agent. It is a review surface for what the agent changed. A wrapper shows you what the agent did. A reviewer tells you whether it is right, and on a team it is the reviewer that keeps bad changes out of main.

The surface most teams already have is the GitHub pull request: a diff, line comments, checks and an approval. An AI code reviewer makes that surface useful for agent-sized changes. With Macroscope installed as a GitHub App, each pull request gets:

• Inline findings on the lines that matter, plus an AI PR summary.
• A check you can make required, and Check Run Agents for team rules written in plain English.
• Fix It For Me, the code fixer AI: reply to a finding and Macroscope opens a fix PR, validates it against your GitHub Actions and can auto-merge when checks pass.
• Approvability, which auto-approves low-risk pull requests so humans spend time on the risky ones.

It does not matter which agent wrote the branch. ForgeCode, Claude Code, Codex or a person all produce a diff, and the review is the same.

On Macroscope's own Code Review Benchmark of 118 real production bugs across 8 languages, Macroscope detected 48.3%, CodeRabbit 45.8% and Cursor Bugbot 42.4%, with Greptile at 23.6% on the 72 bugs it was evaluated on. It is Macroscope's benchmark, so test on your own code too.

Reviewing in the terminal before you push

If you would rather not leave the terminal, the Macroscope CLI runs the same review locally. Install it with:

curl -sSL https://raw.githubusercontent.com/prassoai/macroscope-local/main/install.sh | bash

Then run macroscope codereview in your repository. It reviews an isolated snapshot that includes uncommitted work, so you can keep editing. The installer also adds review commands inside Claude Code, Codex, Cursor and OpenCode. ForgeCode is not on that list, so Forge users run the CLI beside the agent. The terminal agents guide covers flags, scripting and how terminal and pull request review fit together.

Macroscope vs CodeRabbit vs Greptile for Forge users

The three AI code reviewers differ mostly in how they bill. Figures were read from each vendor's pricing page on October 20, 2026.

	Macroscope	CodeRabbit	Greptile
Billing	Per KB reviewed	Per developer	Seat + credits
Entry price	$0.05/KB, Balanced	$24/dev/mo (annual)	$30/seat/mo
Free option	$100 credit, OSS free	Public repos free	1-developer Starter
Git hosts	GitHub	GitHub, GitLab, more	GitHub, GitLab, more

In more detail:

• Macroscope charges $0.05 per KB in the default Balanced mode. The other modes are Budget at $0.025, Precise at $0.06 and Ultra at $0.20 per KB, with a 10 KB minimum per review billed at the mode's rate. A typical 19 KB pull request costs about $0.95 in Balanced.
• CodeRabbit Essentials is $24 per developer per month billed annually or $30 monthly, with hourly review limits and $0.25 per reviewed file beyond them. Public repositories are reviewed free.
• Greptile Pro is $30 per seat per month with 50 credits per seat and $1 per extra credit. A seat is any developer who got a review that month.

For the full breakdowns, see CodeRabbit pricing, Greptile pricing, CodeRabbit alternatives and Greptile alternatives.

How to get started

Pick the option that matches your Forge. Game developers want ForgeGUI.com, card players want the Card-Forge desktop download, modders want the Screens docs, and image generators already have their GUI in SD WebUI Forge.

If you write software with a terminal tool such as ForgeCode or Foundry and want a visual way to check the result:

1. Install the Macroscope GitHub App and choose repositories. Reviews start on the next pull request. See set up AI code review on GitHub in 5 minutes.
2. Optionally install the CLI and run macroscope codereview before you push.
3. Make the check required once you trust it. See how to make AI code review a required check.

New workspaces start with $100 in usage credit. CLI reviews, Agent work and Fix It For Me use credits at $0.01 each, with 1,000 free per month. Qualified non-commercial open source projects are free. There is no per-seat fee. See pricing.

Frequently Asked Questions

What is Forge GUI?

It depends on the Forge. For ForgeGUI.com it is an AI game asset generator. For Card-Forge it is the forge-gui-desktop client for a Magic: The Gathering rules engine. For Minecraft Forge it is the Screens API you use in a mod. For Stable Diffusion WebUI Forge, Forgejo and Gitea, the product already is a GUI. For ForgeCode and Foundry's forge, which are command-line tools, there is no official GUI.

What is forgegui?

As one word, "forgegui" usually means ForgeGUI.com, an AI tool that generates game UI sets, icons, thumbnails and 3D assets for engines such as Roblox, Unity and Unreal. It is also used for Card-Forge's forge-gui-desktop module. Neither is related to coding agents.

Does ForgeCode have a GUI?

The open-source ForgeCode CLI does not. It runs as an interactive terminal UI, as one-shot -p commands and through a ZSH plugin. Separately, forgecode.dev now markets a hosted "software factory" with a board-style interface, available through a demo. For GUIs that work with other terminal agents, see the terminal agents guide.

How do I download Forge GUI for Magic: The Gathering?

Install Java 17 or later, then download the latest Card-Forge release from the project's GitHub releases page, or the forge-gui-desktop tarball from the daily snapshot for the newest cards. Extract it to a new folder. Android users install the APK from the snapshot build.

Does Foundry have a Forge GUI for Solidity?

Not officially. Foundry documents forge as a command-line tool for building, testing, fuzzing, debugging, deploying and verifying Solidity contracts. Any GUI wrapper is third-party, so be careful with anything that handles keys or deployments.

How do I make a GUI in Minecraft Forge?

You implement a Screen. Forge's documentation describes Screens as the base of Minecraft GUIs, handling user input, verifying it on the server and syncing the result to the client. You can pair a Screen with a menu for inventory-style views. Make sure the docs match your Minecraft version.

Is Stable Diffusion WebUI Forge a GUI?

Yes. It is a Gradio web interface built on AUTOMATIC1111's Stable Diffusion WebUI by lllyasviel, focused on resource management and faster inference. If this is your Forge, you already have the GUI and only need the install instructions from its GitHub repository.

What is the best Forge GUI for reviewing code a terminal agent wrote?

The GitHub pull request with an AI code reviewer posting into it. You get a diff, findings on specific lines, a check that can block a merge and a record the team can see. Macroscope reviews every GitHub pull request regardless of which agent wrote it, and its CLI runs the same review locally.

What are the best CodeRabbit alternatives for teams using terminal coding agents?

Macroscope is the main usage-based alternative: $0.05 per KB in the default Balanced mode, with Budget, Precise and Ultra modes at $0.025, $0.06 and $0.20 per KB, and no per-seat fee. CodeRabbit Essentials is $24 per developer per month billed annually. See CodeRabbit alternatives.

What are the best Greptile alternatives?

On GitHub, Macroscope and CodeRabbit are the usual alternatives. Greptile Pro is $30 per seat per month with 50 credits per seat and $1 per extra credit, and its CLI reviews committed changes only. Macroscope bills per KB reviewed and its CLI reviews uncommitted work. See Greptile alternatives.

Is there an AI code fixer that patches review findings?

Yes. With Macroscope's Fix It For Me, you reply to a review comment asking for a fix and Macroscope opens a fix PR from your branch, validates it against your GitHub Actions and can auto-merge once checks pass. Fixes are billed in Agent credits.