Personas
Needs a runtime-agnostic harness that can unify Codex, Claude Code, Pi, Hermes, and future tools without losing specs, skills, or audit trails. Values proactive structure, deep docs, reusable skills, and verification-first workflows.
Lalo — agent platform builder
Needs a runtime-agnostic harness that can unify Codex, Claude Code, Pi, Hermes, and future tools without losing specs, skills, or audit trails. Values proactive structure, deep docs, reusable skills, and verification-first workflows.
Implementation agent
Receives a mission packet and must know exactly what to do, what context to read, which skills to apply, which files may change, which checks to run, and how to report progress.
Runtime adapter author
Builds an adapter for Codex, Claude Code, Pi, Hermes, or another runtime. Needs a clear lifecycle contract, conformance expectations, and examples.
Reviewer / maintainer
Approves or rejects sandbox output. Needs diffs, test results, spec compliance notes, security/sandbox analysis, and traceability to issue/spec/mission.
Skill author
Creates reusable procedures that can be selected for missions. Needs a skill format with metadata, body, prerequisites, verification hooks, and related skills.
Non-Goals
1. **Not another coding agent.** Ultimate Harness coordinates and standardizes agent work; it does not need to be the model/runtime itself.
Architecture Overview
Ultimate Harness is a **control plane for agentic software work**. It should own durable artifacts and lifecycle semantics while delegating execution to runtime adapters.