# Differences Between Forge, Sage, and Muse Agents in Forgecode

> Discover how Forge, Sage, and Muse agents in Forgecode differ. Learn their use cases: Forge for code execution, Sage for research, and Muse for strategic planning to optimize your development workflow.

- Repository: [Forge Code/forgecode](https://github.com/antinomyhq/forgecode)
- Tags: comparison
- Published: 2026-04-08

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**TLDR: Forge modifies files and executes code, Sage provides read-only research, and Muse generates strategic plans without touching the repository. Choose Sage for exploration, Muse for architectural planning, and Forge for implementation.**

The antinomyhq/forgecode repository provides three built-in agents—**Forge**, **Sage**, and **Muse**—that share the same registration mechanism but enforce strict operational boundaries. While all three are defined in `crates/forge_repo/src/agents/` and loaded by the API at runtime, they differ fundamentally in their toolsets