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Coding Agents
Tier 4
OpenHands
Summary
A leading open platform for software-development agents that execute long-horizon tasks in sandboxed environments (Docker) with browser and terminal access - the reference for agent-computer interface design and safe execution.
Key Takeaways
- Sandboxed execution environments are the safety foundation
- Long-horizon tasks need explicit state and event streams
- The agent-computer interface is a designed surface, not an accident
Reliability Note
Official repository of an actively maintained project.
Flows informed by this source
2Agent Architecture
Design the Agent-Computer Interface (ACI)
Apply SWE-agent's key finding: agents perform dramatically better when their commands, viewers, and feedback are designed for models, not humans.
01Audit your current tool surface
02Build the windowed file viewer
03Add validated edits with corrective feedback
+2 more steps to Done
Best forproduction-grade builds with strict verification
5 steps90-120 minutesAdvanced
Harness Engineering
Sandbox Untrusted Code Execution
Contain what your agent runs: isolated execution environments with resource limits, network policy, and workspace mounting done right.
01Choose the isolation and define the policy
02Build the sandboxed executor
03Enforce and verify the network policy
+1 more steps to Done
Best forproduction-grade builds with strict verification
4 steps120-180 minutesAdvanced