Vibe Muse Code: AI agent (CLI agent) in 2026
Meta's terminal and CI coding agent (the muse CLI), built for Muse Spark, with subagents in isolated worktrees and a replayable event log.
Sourced facts checked 2026-10-17 Rank 11 of 16 in CLI agent. Source: Official site or docs, checked 2026-10-17.
Key facts
| Type | AI agent |
|---|---|
| Category | CLI agent |
| Maker | Meta |
| Interface | CLI, SDK |
| Supported models | Meta Muse models (default muse-spark-1.2; plans include Muse Spark, Muse Wonder, Muse Image) |
| MCP support | Yes (per official docs) |
| Subagents | Yes |
| Headless mode | Yes |
| Sandboxing | Yes |
| Pricing (official) | Pay-as-you-go per token with a Meta Model API key, or a flat monthly subscription (Everyday, High, Power and Maximum Usage plans). Plan prices aren't listed on the docs page. (checked 2026-10-17) |
| Note | Not the same as Meta's consumer personal agent 'Muse' (launched 2026-09-08), which isn't a developer harness. TypeScript SDK is in developer preview. |
| Website | https://dev.meta.ai/docs/muse-code |
| Source | https://dev.meta.ai/docs/muse-code (checked 2026-10-17) |
| Vibe Shipped harness page | https://vibeshipped.io/harness/muse-code |
Install
Install
This agent is an MCP client (official docs). To give it a server from this directory, add that server in this agent's own MCP settings; every MCP server entry shows the snippet.
Source: https://dev.meta.ai/docs/muse-code (checked 2026-10-17).
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