Use Copilot agent mode to finish a web app

Jonas used GitHub Copilot with Claude Sonnet to turn a game-score idea into a working app.

Done with GitHub CopilotClaudeยท Intermediate

What they did
Jonas first tried a GitHub tutorial, but that effort stalled. He then opened a fresh repo for a web app that would keep score for his Partners game group, added a rough outline and his existing JSON records, and handed the work to VS Code agent mode running Claude Sonnet. The agent assembled the score entry flow, a past-results table, stats charts, avatar mood pop-ups, bilingual Danish/English support, and dark mode, while Jonas made only small edits himself.
How it went
He finished with an app that worked and put it live on Digital Ocean App Platform. The earlier tutorial path fell apart because the agent kept reverting its own changes, and the hover pop-up ran into similar problems. He also still had leftover agent-generated files to clean up.
Tips
Break the job into stages and save working commits often; Jonas wished he had done that more consistently. If the agent starts losing its editor connection or claiming its own port is occupied, expect extra debugging time.

Try it yourself with GitHub Copilot

In [repo or folder], use Copilot agent mode with Claude Sonnet to build [small complete feature or app]. First, give me a brief plan and the files you expect to touch. Then work step by step: implement one piece, run it or test it, fix any issues, and wait for my approval before any irreversible action such as deleting files, sending data, making payments, or submitting anything. At the end, summarize what you changed, what still needs cleanup, and how to run or verify it.

Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.

Read the original on dev.to โ†—

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