Suggestion: Enable Custom Top-Level Prompts for Copilot to Enhance Support for Domain-Specific Languages (DSLs)

[imbant]

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Background:
We use GitHub Copilot in a project built with a Domain-Specific Language (DSL). This DSL has unique syntax, semantics, and business scenarios distinct from general-purpose programming languages, making it challenging for Copilot to provide accurate and relevant suggestions out of the box.

Proposal:
Introduce a feature that allows developers to define a custom top-level prompt for Copilot, setting the initial context to better align with the project's needs. This could be implemented through one of the following approaches:

Allow VS Code users to create a dedicated file in the project or Provide an option in the Copilot extension settings that serves as the top-level prompt. This prompt could include information about the DSL's syntax, semantics, business scenarios, and coding style. Copilot would use this as the foundation for generating suggestions.

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[imbant]

.cursorrules is what I want for copilot