Ultimate Harness
Ultimate Harness runs a coding mission through one schema-backed lifecycle (mission packet, runtime adapter, sandboxed execution, verification result, human review, promotion) across interchangeable agent runtimes.
- My role
- Solo developer
- Status
- Active
Agentic coding work is bound to whichever runtime produced it: artifacts, sandbox policy, verification results, and the human promotion decision all live inside one vendor's tool, so swapping runtimes loses the record.
$ bun add -g @agenticengineeringagency/ultimate-harness
$ uh init
$ uh adapter add codex
$ uh propose my-mission --workflow research-docs --goal "Refactor X"
$ uh mission run my-mission --runtime codex
$ uh verify my-missionResearch
Inputs become a narrative: adopt, reject or defer.
Spec
The mission packet is drafted and the acceptance criteria locked.
Plan
Workflow profile, runtime configuration and dispatch.
Sandbox
A git worktree is created and the mission bound to it.
Run
The adapter executes while its events are recorded live.
Verify
Checks gate promotion and review notes are attached.
Promote
Sandbox becomes canonical. The command records who approved it.
Change the agent, keep the record
Seven runtime adapters are wired over git-worktree, directory, and container sandbox backends, with strict per-runtime configuration validation and mission-level overrides.
- hermesDirect Hermes server runtime.
- codexOpenAI Codex CLI transport with sandbox routing parity.
- hermes-proxySubscription gateway.
- oh-my-piExperimental.
Public and installable
The harness is published to the public npm registry as an MIT-licensed package, latest version 0.9.0, and documented on its own site.
Who did what
What I owned
Authorship
Lalo is the only human contributor in the repository's history; the remaining commits come from agent identities he directed and merged.
What the team owned
Collaborators
No second human contributor appears in the repository's history; the other commit identities are tooling, not colleagues.
Built with
TypeScript, Bun, Zod, Commander CLI, OpenTUI and Solid.js TUI, YAML manifests, git worktrees, container sandboxes, npm
Receipts
| Source | Kind | Verified |
|---|---|---|
| Public repository | public repository | 2026-08-20 |
| Published npm package, MIT, v0.9.0 | live product | 2026-08-20 |
| Documentation site | live product | 2026-08-20 |
| Repository contributor history | qualitative statement | 2026-08-20 |
Withheld: no adoption, usage, or benchmark figures are published for Ultimate Harness.
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