Prompt Butter Jam

Marks up your prompt before your coding assistant sees it. Works with Copilot, Cursor, Claude Code, ChatGPT — anything you paste into.Build a better coding prompt before you paste it.

01InputAdd goal and context

Start

Required
Required
What makes good context?
  • Relevant sourcePaste the smallest function, component, query, config, or file excerpt that owns the behavior.
  • Exact failureInclude the complete error message, stack trace, failing command, or unexpected output.
  • Expected vs. actualSay what happens now and what should happen instead, using one concrete example.
  • VerificationAdd the nearest test, reproduction steps, or command that proves the change works.

Keep it focused. Remove secrets, personal data, and unrelated files.

Best next addition: Paste the smallest function, component, query, config, or file excerpt that owns the behavior.

Fine-tuneShapes the answer — and most of the token saving
More optionsEffort, output shape, scope, constraints, stop condition
Constraints

Add a goal and some context to build a prompt you can copy.

02Prompt preview
Assistant & costGitHub Copilot