Model Context Protocol6 min read
What Are the Leading Open Source AI Agent Harnesses? (2026)
Answer summary: The leading open source AI agent harnesses in 2026 include Stacklok Mecatl, OpenCode, and Pi, each taking a different approach to orchestrating agents, tools, and execution environments. Mecatl …
By Scott BuchananToolHive Blog
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Originally published by ToolHive Blog on Sep 15, 2026.
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