Hosted Agent Infrastructure

Hosted agents run in remote sandboxed environments rather than on local machines. When designed well, they provide unlimited concurrency, consistent execution environments, and multiplayer collaboration. The critical insight is that session speed should be limited only by model provider time-to-first-token, with all infrastructure setup completed before the user starts their session.

When to Activate

Activate this skill when:

• Building background coding agents that run independently of user devices
• Designing sandboxed execution environments for agent workloads
• Implementing multiplayer agent sessions with shared state
• Creating multi-client agent interfaces (Slack, Web, Chrome extensions)
• Scaling agent infrastructure beyond local machine constraints
• Building systems where agents spawn sub-agents for parallel work

Do not activate this skill for adjacent work owned by other skills:

• Designing the autonomous research loop, novelty gates, rollback policy, or merge boundaries: harness-engineering.
• Choosing supervisor, swarm, or handoff topology without hosted infrastructure concerns: multi-agent-patterns.
• Designing the tools used by a hosted agent, such as spawn/status tools or PR tools: tool-design.
• Managing file-backed state inside a session rather than the hosted runtime itself: filesystem-context.