# castform (ChatGPT Plugin)

> post-train llms with castform.

- Type: plugin
- Publisher: castform (official)
- Categories: Development, AI & ML
- Website: https://chatgpt.com/plugins/plugins_6a84a979b5a081918922e037047514b5
- Open in ChatGPT: https://chatgpt.com/plugins/plugins_6a84a979b5a081918922e037047514b5
- Version: 1.0.0+codex.20260818184934
- Listed: 2026-10-15

## About

design, validate, launch, and monitor castform post-training runs from codex.

## Install

1. **Add it in ChatGPT** Open Plugins in the ChatGPT sidebar (web or desktop), search for “castform” and select +. You'll be asked to sign in to any connected service on first use. Then type @ in a chat to call it.

## Disconnect or uninstall

1. **In ChatGPT** Disconnect an account in Settings → Apps or Plugins. To remove the plugin itself, open castform in the Plugin Directory and select Uninstall plugin. Uninstalling can disconnect every account connected through it, and plugins your workspace installs may not offer the option.

2. **In Codex** Run /plugins in the Codex CLI, select the plugin and uninstall it, or press Space to turn it off.

## Skills

- **design-environment**: Design a benchmax environment, its ordered dataset, tools, and explicit reward shape for a Castform project.
- **generate-data**: Prepare, clean, generate, or reference the data used by a Castform environment from project-owned Python scripts.
- **launch-run**: Review, bundle, upload, and explicitly launch a Castform GPU training run from the project script.
- **setup**: One-time bootstrap for a new Castform project — install the Castform CLI and scaffold the Codex guide, skills, and starter environment. Run this before any other Castform skill.
- **train-sft**: Build a validated benchmax-sft-v1 dataset from existing labeled conversations, upload it, and explicitly launch a supervised finetuning run — no environment, rewards, or rollouts.
- **verify-environment**: Run and inspect the script-owned local two-sibling validation before spending GPU credits.
- **view-progress**: Monitor a Castform run with status, scalar, rollout, and log commands, then diagnose failures or reward drift.

## Example prompts

- "Set up this project for Castform."
- "Help me design a Castform environment."
- "Validate and launch my Castform run."

## castform alternatives

- [Superpowers](https://chatgptplugins.directory/plugins/superpowers.md): Plan, develop, and debug code
- [Codex Security](https://chatgptplugins.directory/plugins/codex-security.md): Security scanning for your codebase
- [Build Web Apps](https://chatgptplugins.directory/plugins/build-web-apps.md): Build frontend-focused web apps with generated assets, browser testing, payments, and...
- [GitHub](https://chatgptplugins.directory/plugins/github.md): Triage PRs, issues, CI, and publish flows
- [Figma](https://chatgptplugins.directory/plugins/figma.md): Figma design-to-code workflows
- [Shopify](https://chatgptplugins.directory/plugins/shopify.md): Build and manage your store

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Source: https://chatgptplugins.directory/plugins/castform · Index: https://chatgptplugins.directory/llms.txt · Independent and community-run. Not affiliated with or endorsed by OpenAI. ChatGPT is a trademark of OpenAI.