# Wonder Agent Play: Independent playground for Muse-Wonder-1.0 (coming soon)

> An independent, unofficial workbench for the Muse-Wonder-1.0 coding model with prompt templates for code fixes, unit tests and JSON output. The playground is locked until the model goes live; not affiliated with Meta.

Canonical: https://indielaunch.dev/products/wonder-agent-play
Last updated: 2026-11-08

|  | Wonder Agent Play |
| --- | --- |
| Website | https://wonderagentplay.com/ |
| Pricing | Free |
| Platforms | Web |
| Categories | AI Tools, Developer Tools |
| Based in | United States |
| Launched | 2026-11-08 |
| Made by | anderson188 |

An independent, unofficial workbench for the Muse-Wonder-1.0 coding model with prompt templates for code fixes, unit tests and JSON output. The playground is locked until the model goes live; not affiliated with Meta.

## Features

- **Coding prompt templates**: Start with Code fix, Unit tests, or JSON format templates, or write a custom prompt.
- **Editable system prompt**: Adjust the system prompt; it counts toward input cost and can be reset to the default helper prompt.
- **Code-fix workflow**: Use a template to diagnose runtime errors and propose a minimal fix.
- **Unit-test drafting**: Generate focused test drafts for a pure function, including Vitest-style workflows.
- **JSON request and validation**: Request JSON-shaped output and see a server-side parse check; this is not a native schema guarantee.
- **Browser-only conversation history**: Keep in-session conversation history in localStorage on the current browser; persistent Active-Memory is unavailable.

## FAQ

### Is WonderAgentPlay an official Meta product?

No. It is an independent third-party playground and is not affiliated with Meta.

### Do I need a Meta API key or local GPU?

No. The site says its browser workflow does not require a Meta API key or local GPU.

### Does it support Meta Active-Memory?

No. Conversation history is kept in this browser through localStorage, and Meta native Active-Memory is not available.

### What templates are available?

The playground provides Code fix, Unit tests, and JSON format templates. Custom prompts are also supported.

### Does the JSON option provide a native schema guarantee?

No. It makes a soft request and performs a server-side parse check; it is not a native JSON Schema guarantee.

### Does the playground run tests or access a terminal?

No. It does not provide a sandboxed test runner, arbitrary tool execution, terminal access, or filesystem access.

### How are credits charged?

When usage is known, credits are charged from actual input and output tokens. Unknown usage is held conservatively for reconciliation.

Tags: coding agent, prompt playground, Muse-Wonder

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