Build a Mac utility with Figma MCP and Codex

An afternoon mp3 renamer: add covers, sanitise and format metadata, rename files. Built with the Figma MCP and Codex.

by Tom Lowry21 Sep 2026

Prompt for your agent

Goal: Replace a manual file-tidying habit with a small native app.
Setup: agents used in source: Codex; tools/MCPs stated: Figma MCP.
Steps:
1. Design the UI in Figma and expose it via the Figma MCP.
2. Have Codex build the Mac app: add covers, sanitise and format metadata, rename files to your format.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Based on: Tom Lowry — https://x.com/negativespaceca/status/2101842286560563407 (summarised from source; the source has no explicit step list)

Steps are our summary of the source (it has no explicit step list). Includes a “Based on” credit line.

I tried this

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Agents, models and tools only what the source states

Agents
Codex
Tools
  • Figma MCP

Sources & credit