Your prompt just became an executable file

GitHubAbout 2 min readSep 7, 2025Watch original
THE SUMMARYAI-generated

Key Concepts:

  • Executable prompt files in VS Code
  • Copilot integration
  • Agent mode vs. Ask mode
  • Context engineering
  • Product requirement document (PRD)

Creating Executable Prompt Files in VS Code

The video demonstrates how to create executable prompt files within VS Code for use with Copilot. The process begins by accessing the settings menu and selecting the option to create a "new prompt file."

Step-by-Step Process:

  1. Access Settings: Click the settings button in VS Code.
  2. Create New Prompt File: Select "prompt file" then "new prompt file."
  3. Name the File: Name the file (e.g., "spec.prompt.md").
  4. Set Mode: Change the mode from "ask mode" to "agent mode."
  5. Add Description: Provide a description for the prompt file (e.g., "build the MVP").
  6. Paste Specification: Paste the desired specification or instructions into the prompt file.

Agent Mode vs. Ask Mode

The video highlights the distinction between "agent mode" and "ask mode" for prompt files. Agent mode allows Copilot to follow a set of instructions defined in the prompt file, whereas ask mode is more interactive and requires user input.

Example: Building Blogmark

The video uses the example of building "Blogmark" to illustrate the use of executable prompt files. The specification for Blogmark is pasted into the "spec.prompt.md" file.

Executing the Prompt File

Once the prompt file is created and the specification is pasted, the file can be executed by clicking the "play" button within VS Code. This action sends the instructions to Copilot in agent mode.

Context Engineering: Context is King

The video emphasizes the importance of context engineering, stating that "context is king." This means that providing detailed and well-defined specifications is crucial for achieving the desired outcome with Copilot.

Product Requirement Document (PRD)

The video suggests creating a product requirement document (PRD) to outline the desired functionality and appearance of a product. Copilot itself can be used to help flesh out the PRD. The video mentions "copiloton.com" as a resource for this purpose.

Notable Quotes:

  • "Context is king."

Synthesis/Conclusion:

The video demonstrates a powerful technique for leveraging Copilot in VS Code through executable prompt files. By creating detailed specifications and utilizing agent mode, users can instruct Copilot to perform complex tasks, such as building applications. The key takeaway is the importance of context engineering and the use of a product requirement document to guide the development process.

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