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Forge

Build and run Agent Kits in your browser — nothing to install, your kits available from any device.

Forge is the browser app for building and running Agent Kits, at forge.agentkitproject.com. It runs the @agentkitforge/core engine — the same engine behind the agentkitforge CLI — so validation, packaging, and export produce identical results. Nothing to install; sign in and start building.

What you need

  • A modern browser (Chrome, Firefox, Safari, or Edge).
  • A free AgentKitProject account (Forge is auth-gated). Prefer the terminal or a headless/local workflow? Use the agentkitforge CLI, which needs no account for local kit work.

Step by step

  1. Open Forge in your browser.
  2. Sign in with your AgentKitProject account (OIDC).
  3. You land on My Kits — kits you own plus Market favorites.
  4. Build a new kit, use an existing one (Run / Chat), import a kit, package/export, install to local agent targets, or submit to Market.
  5. Your kits and favorites are stored in your account and sync across every browser and device.

Sections

Forge covers the full kit workflow: My Kits, Build, Use / Run / Chat, Import, Package / Export, Install Targets, Submit to Market, Settings, and About.

What it costs

Forge is free: building, importing, packaging, exporting, installing to local agent targets, and publishing to Market cost nothing. The only usage cost is running or chatting with a kit on managed AI — that inference is billed at the underlying Anthropic model price with no platform markup (at cost). Or connect your own Anthropic key and pay Anthropic directly.

Free-tier quota

Forge stores your kits server-side under a per-account quota. The default free tier is 25 kits and 250 MB of total storage, with a 10 MB per-file cap. A usage indicator shows how much of your quota you're using.

Note. Quota limits are operator-configurable (the self-hosted build can override them via environment variables), so a self-hosted instance may differ from the hosted defaults above.

Forge vs the CLI

  • The CLI is local-first and works with no account; Forge (the browser app) requires sign-in.
  • Forge keeps everything in sync across devices via your account.
  • Kits built in either use the same package format — export from one, import in the other.