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Notes from the team building iii.

• Loop Engineering Is a Pattern, Not a Feature

  Jul 29, 2026 · Loop engineering is being sold as a product category, but an agentic loop is just a while statement. iii shows how to implement it as a pattern: triggers and functions handle the orchestration, and an LLM is used only where real judgment is required.

• Loops, Graphs, and the Layer That Matters

  Jul 21, 2026 · Prompt engineering, context engineering, loop engineering, graph engineering -- four namings in three years for the same disposable scaffolding layer. Patterns come down. Substrates hold.

• Loop Engineering Is Just Software Engineering. We Have a Name for That.

  Jun 25, 2026 · Loop engineering describes an event-driven, observable, stateful distributed system with retries, dead-letter handling, and durable state. The naming is different. The systems are the same. iii ships it as one worker.

• How to Build Your Own Agent Harness

  May 28, 2026 · Most agent teams adopt a harness as one decision. iii decomposes it into eleven independently-replaceable workers on one engine bus. Build your own stops meaning fork a framework and starts meaning swap a few workers.

• The Substrate Is Installable

  May 21, 2026 · Every long-running agent ends up rebuilding the same surrounding layer: task state, event logs, replay, approvals, memory, retries, branching, provenance, capability tracking. The missing primitive is not missing. It is installed in three commands.

• Why agent sandboxes are converging on libkrun, not Firecracker

  May 15, 2026 · Local-first coding agents need hardware isolation on macOS and Linux, and libkrun is the practical microVM path.

• Building Agents for Real World

  May 14, 2026 · Reliable agent systems converge when validation, isolation, and observability are properties of the runtime, not reminders in a playbook.

• Add a worker

  May 7, 2026 · The cloud is a bazaar, and that was okay until agents arrived and had to contend with 10,000 shops. Three primitives, one engine, and one answer to every question.

• The Harness Is the Backend

  Apr 28, 2026 · The agent harness debate takes for granted that the harness is its own world, separate from the backend. iii makes a different bet: the harness is the backend.