Creation
Design an iOS app template from a prompt
Connect a code agent to a design tool (here Paper, via MCP), then ask it to place an iOS mockup (a stock-trading app) directly on the canvas.
AUDIENCE · 31 CASES
Developers: code agents, methods and prompts
Code agents are not only used by developers: there are marketers, lawyers and parents who build their own tools. For developers, the most instructive cases are those that detail the method: given context, verification required, human review.
Selection: the entire Dev category, plus cases where a code agent was used to build a tool outside of the developer trade.
WITH THEIR SOURCE
Spotted (28)
Dev
Migrate more than 200 sketches to GitHub, tidy and versioned
An agent retrieved public sketches, classified them into versioned folders, with commit messages and README, and then sent them to GitHub.
Dev
Recast a landing page and deliver it from a GitHub link
Start from a repository, produce a neat model, and then implement the page to a result ready to put online.
Marketing
Generate Google Ads ad variants from past performance
Without a technical profile, the growth marketing manager from Anthropic has built with Claude Code a flow that starts from campaign data and releases a CSV ads ready to import.
Creation
Decline dozens of advertising visuals one click with a homemade Figma plugin
To avoid hours of copying and pasting, the marketer of Anthropic has built by Claude Code a Figma plugin that generates all the variants of a visual from a list of texts.
Legal
Build yourself the small tools of a legal team
Without a developer, the legal team of Anthropic has created a "standard" with Claude Code that directs to the right lawyer and tools for monitoring legal journals.
Everyday
Create in an hour a communication app for a loved one who has trouble talking
A member of the legal team of Anthropic has built with Claude Code a predictive text application that suggests answers and pronounces them with a synthesis voice.
Dev
Add a function to an existing tool by assigning the repository to a code agent
Simon Willison asked Claude Code, from the web, to add a new type of content to his newsletter tool, giving him the reference code and a way to check his work.
Dev
Require a code agent to demonstrate what he built
To verify the work of his agents, Simon Willison created two tools that make them produce a demonstration document, orders and captures in support, and he developed them from his phone.
Dev
Assign a GitHub ticket to an agent and recover a tested pull request
With the GitHub Copilot code agent, we assign a way out like a colleague: the agent works in an isolated environment and opens a pull request to be read again.
Dev
Provide agents with a very large scale repetitive code migration
Nubank has delegated to Devin the migration of its ETL monolith of more than 6 million lines to submodules, with engineers simply rereading and approving.
Dev
Let an agent answer the recurring questions asked to the data platform team
Carrefour created an agent who learns from the history of his team's conversations "platform engineering" to answer questions already processed on its data platform, before extending it to other teams.
Dev
Monitoring the cost and carbon footprint of each generational AI project on a common platform
Suez has built "GenAI Core", a central platform that frames its 50+ generation AI projects and displays consumption, cost and CO2 emission estimates for each request.
Dev
Create a voice input vinification monitoring application with the AI alone for 36 vats
Joannès Violot Guillemard, a winemaker in Pommard, has designed himself with Claude and Glide an application where his team dictates the temperature, density and acidity of each tank, and calculates product additions and sends alerts.
Learning
Have a code error checked, on simulations
Chloë, PhD student in mathematics applied in Grenoble, uses Codex as an "auditor": "As soon as I have an error in my code, whether I do not understand or want to optimize it to go faster, I use theIA. »
Dev
Deploy a self-hosted code assistant for client projects subject to sovereignty requirements
Capgemini uses a private development assistant, based on Mistral AI's Codestral model, on its projects for aeronautics, defence and public sector clients.
Dev
Provide code officers with review, risk analysis and documentation of each change
Doctolib has equipped its technical team with a code agent and runs its own remote agents, which now open 10% of the requests to modify the platform code.
Dev
Accelerate tests and specifications in a telemedicine platform, with an assisted code review
Medgate, a telemedicine operator in Switzerland and Germany, tested a code agent for three months with about fifteen engineers, before deciding to extend it to the entire organisation.
Dev
Transforming the recording of a meeting with lawyers into a specification that developers can use
Endava, an international software service company, uses a code agent throughout its projects, including for needs analysis: a specification that would have requested one to two weeks of round-trip travel was obtained in two one-hour meetings.
Dev
Prepare recurring infrastructure applications by an agent on Slack
The Leboncoin infrastructure team built BotISS, an agent that responds on its Slack support channel, completes DNS requests and opens the code change itself, then validated by an engineer.
Dev
A single internal agent, used to code, prototype and analyze data
Alan built Hopper, an internal agent who responds to the code, opens sweaters requests, publishes prototypes and builds dashboards: 80% of employees use them according to the health insurer.
Dev
Unlock tedious code migrations with an agent instructions file
The BlaBlaCar front-end team entrusted the GitHub agent Copilot with repetitive code migrations that remained in plan, describing the task in a reusable prompt file.
Dev
An automatic code reader who checks his remarks before publishing them
ManoMano built Jiminy, a code reviewer who explores the repository, applies the rereading rules already followed by the teams and checks every comment before posting it in GitLab.
Dev
Rewrite an old Java C++ installer with a code agent in three days
Migrato, a small Dutch publisher of content migration software, used the IBM Bob code agent to rewrite in C++ a Java 8 installer that blocked the modernization of his suite.
Creation
Switch from a model generated by the AI to code conforming to the design system
Doctolib has built a plugin for Claude that transforms a prototype generated by theIA into a React code based solely on the verified components of its design system, Oxygen.
Dev
Monitor mobile application crashes by an agent, read-only
At ManoMano, a chain of agents analyses the crashes of mobile applications every four hours, looks for whether the problem is already known and links each case to a ticket; the creation of tickets has been withdrawn at the AI.
Dev
Read thousands of post-mortem incidents to an LLM to spot recurring breakdowns
At Zalando, a LLM treatment chain summarizes and classifies post-mortem incidents affecting databases, in order to derive recurring causes and priority investments.
Dev
Agents who write test cases and specifications for equipment engineers
Valeo has developed with Gemini Enterprise its first engineering agents: creation of test cases from the design, continuous review in the integration chain, assistance in the drafting of system specifications.
WRITTEN BY THE DESK
Practical cases (3)
Dev
Make a pull request by an agent before the human review
A first automated passage to identify probable bugs, missing tests and safety risks, so that the human review focuses on the essentials.
Dev
Write characterization tests before refactoring an old code
Before touching an old module, have an agent write tests that freeze his current behavior, to refactor without breaking.
Dev
Write the README and the installation documentation of a project
Read the repository by an agent to produce a reliable README: what the project is for, how to install, launch, test it.