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+---
+aliases: agent-harnesses
+display_name: Agent Harness
+related: ai-agents, coding-agents, autonomous-agents, agent-framework, mcp
+short_description: Agent harnesses provide the runtime scaffolding that helps AI agents act reliably.
+topic: agent-harness
+---
+Agent harnesses are the runtime scaffolding around AI agents. They usually combine context delivery, tool interfaces, planning state, memory, sandboxes, permissions, evaluation, and observability so agents can complete longer tasks reliably. Agent harnesses are especially common in coding agents, research agents, and multi-agent workflows where repeatability, safety, and traceability matter.