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harness-sdk

by strands-agents

Model-driven Python SDK for building and instrumenting AI agents

Python
Updated Jul 2, 2026
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What It Does

Provides a model-driven SDK for defining and running AI agents in a few lines of Python. Uses declarative agent specifications (models, tools, and policies) to generate agent behaviors and glue code, reducing boilerplate for multi-step workflows. Includes integrations with major LLM providers and telemetry hooks for observability.

Key Benefits

As agent ecosystems scale, reproducible agent implementations and clear interfaces are essential for evaluating behavior and trust. Harness-sdk makes agent creation predictable and instrumentable, which helps teams capture agent track records and compare behaviors across models and settings. That structure is a prerequisite for meaningful agent-to-agent evaluation and continuous reliability testing.

When to Use

Developers and teams who want to prototype and deploy structured agents quickly while retaining observability and multi-provider flexibility.

Real-World Examples

  • Rapidly define agent behaviors and toolchains with minimal code
  • Compare agent versions across LLM providers to build an agent track record
  • Add telemetry to agents for production monitoring and post-run evaluation
  • Prototype multi-step delegated workflows for downstream A2A evaluation
Works With
openaianthropicbedrocklitellmllamaollamaopentelemetry
Topics
agenticagentic-aiagentsaianthropicautonomous-agentsbedrockgenailitellmllama+9 more
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Keywords
multi-agent trustagent delegationagent reliabilitymodel-driven agents