Is Gemini CLI or Amp open source?

Gemini CLI is open source under Apache-2.0. Amp is proprietary.

Can I reuse Agent Skills between Gemini CLI and Amp?

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 is open source (Apache-2.0); Amp is proprietary. If you need to self-host, audit or fork the harness, that settles it.
Amp also runs in IDE.
Gemini CLI supports ACP; we have not verified it for Amp.
Both support MCP, Agent Skills, AGENTS.md, 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.

Amp

Frontier coding agent for terminal and editor. Co-created the AGENTS.md convention and supports Agent Skills.

Is Gemini CLI or Amp open source?: Gemini CLI is open source under Apache-2.0. Amp is proprietary.
Do Gemini CLI and Amp support MCP servers?: Gemini CLI: yes. Amp: yes.
Can I reuse Agent Skills between Gemini CLI and Amp?: Yes. Both read the open Agent Skills (SKILL.md) format, so the same skill folder works in both.

Reviewed Oct 5, 2026.