Definition
The operational scaffolding around AI agents — identity, memory, permissions, tools, sandboxes, scheduling — distinct from the underlying LLM. Company harnesses (e.g. qm-quartermaster) differ from personal-assistant loops.
Key Points
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2026-08-13: deepseek-harness MIT plugin-based rival framing vs Claude Code / Codex (2026-08-13-deepseek-harness-v4-pro)
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2026-08-04: kiro-crew positioned as application layer on Kiro harness for unattended multi-session work (2026-08-04-aws-kiro-crew-official-blog)
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Model-agnostic harnesses swap backends (claude-code, codex, opencode, Pi) without rebuilding org infrastructure
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Eval harnesses (supabase-evals) measure agents; ops harnesses run them in production
Related
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2026-09-18: Google antigravity harness runs google-cc on isolated cloud instances (2026-09-18-google-cc-family-ai-agent)