comparison

Differences Between Forge, Sage, and Muse Agents in Forgecode

April 8, 2026 antinomyhq/forgecode ↗

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

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{
  "mcpServers": {
    "instagit": {
      "command": "npx",
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