How do you use Claude Code for Power BI development? Open your Power BI project (PBIP) folder in VS Code, run Claude Code in the built-in terminal, and describe the change in plain English: the agent reads the project files, writes the DAX, edits the Sales.tmdl file itself, and asks your permission before each command. Codex from OpenAI works the same way; this is a walkthrough for anyone who has only ever copy-pasted DAX out of a chat window.
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See also: Power BI as Code: The Setup AI Needs for Your Reports
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What you'll learn
Open the terminal inside VS Code (Ctrl+J on Windows, Cmd+J on Mac) and run basic commands
Start Claude Code with the claude command and hand it a job in plain English, such as adding a new measure to a table
Answer the permission prompt (yes, yes and don't ask again, or no) and switch modes with Shift+Tab: manual, accept edits, plan, auto, and bypassPermissions
Point the agent at one file with an @ tag so it edits exactly the TMDL file you mean
Call a reusable skill with /, tell local skills from global ones, and vet skills from third parties before you install them
Covered
Terminal basics, VS Code integrated terminal, AI harnesses, Claude Code, Codex, permission prompts and modes, Power BI project (PBIP) folders, TMDL model files, DAX measures, the context window, @ file tags, skills, Skills for Fabric
Tools
Claude Code (Anthropic), run from the VS Code terminal
Visual Studio Code
Power BI Desktop, with the report saved as a Power BI project (PBIP)
PowerShell on Windows, or Terminal on Mac
Codex (OpenAI), the equivalent harness if that is what your company allows
Prerequisites
A Power BI report saved as a Power BI project (PBIP), so the semantic model and report exist on disk as text files
VS Code installed, plus a Claude or ChatGPT account to sign in to the harness
Enough DAX knowledge to read a measure the agent writes and judge whether it is right; no terminal or coding experience needed
Resources