Hardware-isolated sandboxes and native harnesses power users can own

unreallabsai

Async-first agent harness focused on non-blocking loops and concurrent tool execution for high-throughput agent systems.

Use caseUse it to build agents that schedule many concurrent tool calls without blocking the main reasoning turn.

nev3rfail

On-device Android agent harness that runs the full loop locally with phone sensors, Maps, browser debugging, and widgets.

Use caseUse it to keep an always-on agent in your pocket that can act on photos, maps, and local apps without a remote host.

runcanary

Independent verification harness that takes agent changesets, spawns swarms in sandboxes, and returns evidence of failures.

Use caseUse it to pressure-test coding-agent patches with runtime scenarios before you accept the claim of done.

Blair Hayes

Google's open agentic orchestrator topped Hacker News by offering a kubectl-shaped control plane over gVisor sandboxes and Actor Teleport snapshots. The piece argues the real story is the harness-agnostic substrate underneath rather than yet another framework.

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Docker

Docker released cloud sandboxes that isolate agent code with secret injection via an external network proxy so credentials never enter the guest. Discussion highlights how the proxy model improves on traditional shared-kernel containers for agent safety.

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Mollie Pettit

Google Cloud recaps the Agent Factory sessions defining an agent as model plus harness and showing why better stacks beat smarter models alone. It ties harness engineering to shifting left on verification and parallel coding agents.

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