Tool · 30 cases
Use cases: Claude Code
Claude Code is Anthropic's coding agent, which runs in the terminal and works directly on your project files. The cases range from experienced developers speeding up refactors to people with no technical background building internal tools. The accounts also make clear that you need to review what it changes, use version control and test before publishing. Each case includes the workflow used and a starter prompt.
30 cases, 10 of them from Brazil, from newest to oldest. The most common topics are productivity, personal finance, and business and sales. People who show up most: developer, business owner, and teacher. Each case links to the original source, shows a verification date and includes a prompt we wrote.
The cases
30 cases
01Claude doubled the speed of a home Wi-Fi network
A user asked for help with slow internet; the agent ran tests, read the Mac's signal data and walked them through the router settings.
02Product manager turns scattered notes into a priority list
Ron Forbes dumps meeting notes into a folder and Claude Code returns summaries and tasks sorted by priority.
03Architect connects agents to Grasshopper for parametric geometry
Miro Bannwart's plugin has the agent interview the designer and build connected geometry stations.
04Engineer compares circuit simulation with the real oscilloscope
Lucas Gerads connected Claude to a LeCroy oscilloscope and a SPICE simulator.
05A portfolio plan built from brokerage exports
Matt Stockton gave Claude the CSVs and a prompt with goals, then said: "ask me all the questions".
06Writing a novel chapter by chapter with custom commands
A Chinese author had the agent create commands like /brainstorm, /outline and /write-chapter following his method.
07A professor gathers tax documents and deductions with skills
Chris Blattman, a professor at the University of Chicago, built routines that hunt for tax documents in Gmail and assemble spreadsheets.
08Bookkeeping for a Swedish company with agents
A cofounder had agents read receipts, suggest accounts and VAT, and prepare entries for approval.
09Automatic expense tracking on a Raspberry Pi
Fahad Hasin, who says he knows little about coding, had Claude build an expense tracker that runs every night.
10Filling out the accountant's questionnaire with AI
The author had Claude read the fields of the accountant's form and fill it in from their documents, flagging what was missing.
11Medical expense reimbursement claims from Amazon receipts
Claude read each receipt, found the eligible amount and date, and filled in the reimbursement portal.
12Separating business expenses from personal card statements
The author had Claude talk through the first few statements to learn her patterns before classifying the rest.
13Non-coding CEO uses Claude Code for email and budgeting
Michael Crist asked for only the emails from real people waiting for a reply and built the family budget from statements.
14Executive builds an "anti-system" task system
Hilary Gridley captures tasks with a tap on her iPhone and lets Claude organize them and learn her preferences.
15Two agents reviewing each other on the company tax return
Claude Code wrote the calculations from QuickBooks data and Codex reviewed them until they agreed.
16Researching 50 target companies and filling in the CRM
A Dutch consultant filters the list by hand, then the agent researches each company and creates records ready for outreach.
17Teacher generates custom interactive lessons for each class
Given a text, the students' level and vocabulary, Claude Code returns an HTML lesson with flashcards and exercises.
18A robotic arm designed without knowing CAD
Claude Code wrote a script that FreeCAD rendered live; the author printed and assembled the parts.
19When your AI limit runs out in the middle of the day
A dev running four subagents across four repositories ran out of tokens and reflected on their dependence on AI.
20Giving an agent a server and the mission of building a business
A dev let Claude Code run every 30 minutes on a VPS, with memory kept in files, asking for help via Telegram.
21Estimating how long your AI plan will last before it runs out
A dev published an open calculation to estimate how many tokens fit into the Pro/Max plans.
22Letting the agent deploy and read production errors on its own
The founder of a deployment platform explains how they designed an MCP server to take the human out of "copy and paste the log".
23Teaching an agent to use your bank's API
A developer created an open source skill so Codex and Claude Code can integrate with the Banco Inter API.
24Preparing your income tax return with an AI agent
A developer used Claude Code with Open Finance data to organize tax statements and build the return, leaving only the review for himself.
25Building an entire platform without being a programmer
A construction inspection entrepreneur in Kazakhstan used only Claude Code for ~6 months to create more than 30 modules.
26Teaching AI to make your site findable by people and by other AIs
A developer created a skill for Claude Code to review the SEO and GEO of websites.
27Launching a complete RPG with AI as the only engineer
A developer controlled the architecture and let Claude Code write Therryn, a browser idle RPG.
28Ask an AI for a second reading of an MRI
A developer in Finland gave their shoulder MRI images to Claude Code to compare against the radiology report.
29Leave a coding agent running for 24 hours and learn from the bill
An experiment letting Claude Code work unsupervised for a full day ended with a high bill and a security scare.
30Switching from Cursor to Claude Code for Big Features
A Brazilian dev who works for clients abroad describes how their way of working with agents changed.