Is Gemini CLI or Hermes Agent open source?

Gemini CLI is open source under Apache-2.0. Hermes Agent is open source.

Do Gemini CLI and Hermes Agent support MCP servers?

Gemini CLI: yes. Hermes Agent: not verified yet.

Yes. Both read the open Agent Skills (SKILL.md) format, so the same skill folder works in both.

Comparison

How the two compare on the things that decide whether your setup carries over: open standards, license, models and where they run.

	Gemini CLI	Hermes Agent
Maker	Google	Nous Research
License	Apache-2.0	Open source
Models	Google Gemini models	Model-agnostic: hosted or local models
Runs in	Terminal	Terminal, Desktop, Messaging
MCP	MCP: supported	?MCP: not yet verified
Agent Skills	Agent Skills: supported	Agent Skills: supported
AGENTS.md	AGENTS.md: supported	?AGENTS.md: not yet verified
ACP	ACP: supported	ACP: supported

Both are open source, so you can inspect and self-host either.
Models: Gemini CLI runs Google Gemini models; Hermes Agent runs Model-agnostic: hosted or local models.
Hermes Agent also runs in Desktop, Messaging.
Gemini CLI supports MCP; we have not verified it for Hermes Agent.
Gemini CLI supports AGENTS.md; we have not verified it for Hermes Agent.
Both support Agent Skills, ACP, so MCP servers, skills and repo instructions you set up carry over if you switch.

Gemini CLI

Google's open-source terminal agent for Gemini models, with MCP servers, extensions, Skills and AGENTS.md support.

Hermes Agent

Model-agnostic personal agent across CLI, desktop and messaging apps. Learns across sessions and writes reusable skills from its own work.

Is Gemini CLI or Hermes Agent open source?: Gemini CLI is open source under Apache-2.0. Hermes Agent is open source.
Do Gemini CLI and Hermes Agent support MCP servers?: Gemini CLI: yes. Hermes Agent: not verified yet.
Can I reuse Agent Skills between Gemini CLI and Hermes Agent?: Yes. Both read the open Agent Skills (SKILL.md) format, so the same skill folder works in both.

Reviewed Oct 5, 2026.