TweakThis

The TweakThis blog

How TweakThis is built and used: engineering write-ups and field reports from real feedback loops between a web app and the coding agent fixing it.

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6 min read

Introducing TweakThis: point at your app, and your agent fixes it

Why UI feedback loses its context on the way to a coding agent, and how TweakThis sends it with the page, the element and a screenshot to Claude Code or Codex over MCP.

The TweakThis picker outlining the Shop beans button on a sample coffee shop.

Point at it.Your agent fixes it.

Install the extension, connect Claude Code or Codex to the MCP server, and send your first note from your own app. Every fix still waits for your review.

Browser extension and MCP server. Free plan, no card needed.

A feedback item ready for review in the TweakThis dashboard, with Claude Code’s summary of what it changed and how it checked it.