Sponsor Suno AI Music arrow_forward
Subagent

Harness Github Specialist

(dev-only) github harness specialist — GitHub issue-fix and PR-review for moai-adk-go maintainers. NOT distributed to user projects. Uses…

Type
Subagent
Repository
modu-ai/moai-adk
GitHub stars
1.2k
License
Apache-2.0
Repo last updated
Sep 27, 2026
Source file
README.md

What Harness Github Specialist is

Harness Github Specialist is a subagent published in the modu-ai/moai-adk repository on GitHub, which has about 1.2k stars. The repository describes itself as: “Agentic development harness for Claude Code — SPEC-driven plan/run/sync, TRUST 5 quality gates, model+effort routing, and Claude×GLM multi-LLM cost control. Single Go binary, 16 languages, zero deps.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Harness Github Specialist and get back a compact result.

How to install Harness Github Specialist

Claude Code

  1. Download README.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from README.md, shared under the repository's Apache-2.0 license. Read the full file on GitHub.

MoAI-ADK

A verification-driven agent orchestration harness — the structure that makes Claude Code's code trustworthy

English · 한국어 · 日本語 · 中文

Official Documentation · Book: Practical Agentic Coding with Claude Code · Discord

> "The model is a stochastic worker moving token by token. It cannot remember, turn to turn, what it used this turn and how much, whether the result is good, or how far the last session got. A harness enforces all three from the outside."

What's New in v3.1 — Kanban Mode

> v3.1 ships on August 15, Liberation Day in Korea. The intent: release work from the old shape of a single session bound to one context limit. The limit itself does not disappear — what actually changes is written down below.

A session holds one context window, and a long SPEC fills it. Everything that comes after carries everything that came before: the plan you no longer need is still in the window while you review, and the review is still there while you write docs. The usual escape is /clear, which throws away the thread along with the ballast.

Kanban Mode splits one unit of work across four terminals instead of one. A lead session drives the chain; three companion sessions each own a single column — plan, run, sync — and carry only that column's context. Review is not a separate column: the sync gate absorbs it, running the review lenses itself to reach the verdict. Nothing is uncapped: each session still has its own limit. What changes is that no session carries three phases' worth of history, so the same budget goes considerably further, and a finished phase is cleared without losing the card.

Each column can run a different backend and effort level. The run above puts Plan on Opus 5 at high effort, Run on GLM 5.2 at xhigh, and Sync on GLM 5.2 — the depth of reasoning a column needs is not the same in every column.

Getting started

moai cc -k                    # lead — announces a run-id, seeds the chain
moai cc -k --name plan        # companion, in its own terminal
moai cc -k --name run
moai cc -k --name sync

Companion sessions are launched by hand, one per terminal — a session never spawns a peer. Companions are named by their bare role: the run-id stays the lead session's identifier and never rides a companion name; a second live session claiming the same role takes the next free number. Swap moai cc for moai glm on any column to put just that column on the GLM backend.

Which backend goes where

When you open a kanban run, the bootstrap notice carries a default recommendation — token availability first: lead on moai glm -k, plan on moai cc -k --name plan, run on moai glm -k --name run, sync on moai cc -k --name sync. The reasoning is the kind of thinking each lane needs. Plan and sync turn on judgment and review, so they sit on Claude; run is implementation-heavy, so GLM keeps its cost down. The lead is not the seat that renders verdicts — it watches the queue and moves cards — so GLM, cheap to keep waiting, fits it. When a Claude verdict is needed under a GLM lead, escape through a session named judge — the only route by which the GLM lead uses Claude. When one account starts hitting 429s, spreading lanes across accounts is the workable move. This mix is only the default — a different combination, or unifying every session on one backend, is equally fine.

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Harness Github Specialist?

Harness Github Specialist is a subagent for Claude Code and Claude Cowork from the modu-ai/moai-adk repository on GitHub. (dev-only) github harness specialist — GitHub issue-fix and PR-review for moai-adk-go maintainers. NOT distributed to user projects. Uses…

How do I install Harness Github Specialist in Claude Code?

Download README.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Harness Github Specialist in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Harness Github Specialist safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

Similar resources

Browse all skills, subagents, and plugins →

Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under Apache-2.0. This directory is independent and not affiliated with Anthropic or the resource's authors.