A Consultant Admitted Claude Does 80% of His Job. I Built That Skill on DeepSeek

Set up the DeepSeek harness from zero, connect it to Codex and Claude Code, then run a Strategy Consultant Skill that does 80% of the job. Full guide inside.

DeepSeek goes viral.

Because it is a lot cheaper yet effective.

Also, it is open source, meaning you can download it and use it for free.

(If you have a powerful computer.)

But there was one problem: they did not have a harness.

Meaning, you can use it like ChatGPT, but not Claude Code.

To learn more about harness, read this.

But recently, the DeepSeek harness landed on GitHub.

DeepSeek harness repository on GitHub after release

And no surprise, it became the fastest-growing GitHub repo, with 120K+ repos in 3 days.

DeepSeek harness GitHub growth chart showing 120K repos in 3 days

OpenClaw used to hold this record, but now DeepSeek is becoming more popular.

So I installed this harness, so now I can open it with one click.

DeepSeek harness app opening with one click from desktop

So I can start building with it immediately.

DeepSeek harness interface ready for building

Plus, I injected DeepSeek inside the Codex app, so now I can use it inside Codex.

DeepSeek model injected inside the Codex app settings

And also, I can now use it inside Claude Code too.

DeepSeek running inside Claude Code terminal session

I’ll explain everything to you step by step.

But of course, by solving another problem.

I have too many options, but what should I build?

What Should I Build With the DeepSeek Harness?

So I searched for business problems to build something with the DeepSeek harness.

And I came across this Reddit post.

Reddit post by a strategy consultant about Claude Code and Cowork

A strategy consultant admits that Claude Code and Cowork scare him.

In the full post, he admits that Claude does everything with 80-85% accuracy.

Reddit consultant admitting Claude does his job with 80-85 percent accuracy

It’s an honest confession.

That got me thinking: can I turn this into a Claude Skill?

But I also know that not everyone has a Claude subscription, and some of you may find it a little expensive.

So I created the skill to run on the DeepSeek harness.

Let me first show you what I built.

How the Strategy Consultant Skill Works on the DeepSeek Harness

I installed this Claude skill into the DeepSeek harness.

I’ll show you how.

Then I pasted my newsletter statistics and said I wanted to increase them 10x.

Just after I pasted the prompt, look how DeepSeek chose the right skill from the catalog, loaded it, and started working on the task.

DeepSeek Harness loading the Strategy Consultant Skill from the skill catalog

This skill also uses harness capabilities like parallel subagents, plan mode, workspace file outputs, and session resume inside DeepSeek Harness.

Next, it asked me 7 different questions:

Strategy Consultant Skill asking 7 engagement questions

I answered them one by one, and now 6 subagents are working in the background.

Six parallel subagents working in the DeepSeek harness background

After 40 minutes of dense work, it started writing my growth-strategy.md.

And turned it into a dashboard.

Growth strategy dashboard generated from growth-strategy.md

How the Strategy Consultant Skill Works

Diagram of the three phases of the Strategy Consultant Skill

In short, it has three phases.

In the first phase, this skill turns the DeepSeek into a junior consultant, actually multiple ones.

After collecting your agents, it creates 6 sub-agents. They run on v4-flash, the cheap version.

In the second phase, it stops and shows you a one-page summary.

In the third phase, it applies your corrections and writes the final files to your workspace: growth-strategy.md and growth-model.csv.

We are using harness features the whole way: plan mode for the kickoff, parallel subagents for research, session resume for the checkpoint, workspace files for the deliverable.

This is first issue of AI in Business. If you have a solid use case for AI in business, reach out to me via DM.

After the paywall, we will set up the DeepSeek harness from zero, connect it to Codex and Claude Code, and explore how to install the Strategy Consultant Skill.

We’re building together inside the AI Academy.

To get access, you need to join the Inner Circle, which is currently $200/year.

After September 1, the price will increase to $300/year.