I Built an AI Agent That Writes My Morning Stock Brief (In My Voice) with Claude Cowork
A Claude Cowork tutorial on building an AI agent, a custom skill, and a scheduled task that runs every weekday.
Building a Claude Cowork AI agent that runs while you sleep sounds like overkill, until you get 3 hours a week back.
You switched the Claude from ChatGPT and learned how to use Claude Cowork.
What’s next? What’s the one thing you did that saved you hours?
Most people fancy the tutorials and installed apps, but build nothing.
Let’s change this together.
What We'll Build with Claude Cowork
Every weekday at 9 AM, this shows up on my screen before I finish my coffee.
That is a stock market brief. Real analyst data, SEC filings, overnight news.
The agent does the research.
The skill makes it sound like me instead of a LinkedIn motivational speaker.
(No hype, no banned words, all numerical)
The scheduled task runs the whole thing while I sleep.
I used to spend 30 to 45 minutes every morning doing this by hand.
Now I spend 5 minutes reading what was already waiting for me.
Three hours a week back.
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The Claude Cowork Pattern Works for Anything
The stock brief is my problem. Yours is different.
But the formula is the same.
Skill is how Claude talks. Tone, style, format.
An agent is what Claude does. Research, analyze, write.
The schedule is when it happens. Daily at 9. Monday at 6. Every hour.
Stack the three, and something real is waiting for you every day.
Written in your voice.
Doing work.
Hands off.
A few mappings:
Content creator: news-scraper agent + your writing voice skill + 7 AM daily. Topic ideas in your voice, ready before breakfast.
Sales rep: LinkedIn lead-finder agent + cold outreach voice skill + 9 AM weekdays. Ten personalized messages, drafted.
Developer: PR reviewer agent + your code review style skill + noon daily. Overnight PRs with comments already written.
Student: paper summarizer agent + academic notation skill + Sunday 8 PM. The week’s 5 papers, summarized the way you take notes.
Now ask yourself one question.
What do you repeat every morning?
If you have an answer, keep reading.
I will walk through how I built the stock brief.
Build your version in your head as I go.
Build 1: Your Voice Skill
Skills are the backbone of Claude.
I built this skill recently.
Every client had a different voice.
Every project needed a different tone.
I was rewriting the same voice instructions into every new chat.
Got tired of it. Built the skill once. Now it reads my writing and clones the voice.
Two ways to load the skill.
I am a heavy Claude user, so I picked Plan B.
One-minute setup. It reads my CLAUDE.MD and chat history pull the voice out on its own.
To install, drop this prompt into any Claude Cowork session.
Download this skill from here: https://github.com/gncll/voice-cloner-skill
Then trigger it.
Run the voice cloner Skill.
Easiest setup I have seen in any Claude skill.
Pick your plan.
Or just type the command.
/voice-cloner
It reads your history. Pulls out the patterns. Builds the skill file.
Here it is.
If you want more control, go with Plan A. Ten questions. Five minutes. You define everything.
The output is a reusable skill file. Drop it into any Claude Code, Cowork, or Desktop session. Your voice shows up automatically.
That is the skill part done. Now the agent needs it.
LearnAIWithMe Paid Perks
The vault got a massive update from Yevheniya.
400+ skills. Daily AI news added.
To reach the vault;
I’m about to share my secret for building AI agents quickly and accurately.
Stop watching tutorials. Start building.
Build 2: The AI Agent
You do not need to write agents from scratch.