prompt-builder

Guides developers through creating production-ready GitHub Copilot prompts with structured discovery and best practices. Systematically gathers requirements across nine discovery sections covering identity, persona, task specification, context, instructions, output format, tools, and validation Generates complete .prompt.md files with proper front matter, clear structure, and comprehensive instructions following established patterns Includes best practices for prompt engineering, tool integration, error handling, and output standardization Supports all Copilot modes (agent, ask, edit) and tool capabilities with guidance on appropriate selection for each task type

INSTALLATION
npx skills add https://github.com/github/awesome-copilot --skill prompt-builder
Run in your project or agent environment. Adjust flags if your CLI version differs.

SKILL.md

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2. Persona Definition

  • What role/expertise should Copilot embody? Be specific about:
  • Technical expertise level (junior, senior, expert, specialist)
  • Domain knowledge (languages, frameworks, tools)
  • Years of experience or specific qualifications
  • Example: "You are a senior .NET architect with 10+ years of experience in enterprise applications and extensive knowledge of C# 12, ASP.NET Core, and clean architecture patterns"

3. Task Specification

  • What is the primary task this prompt performs? Be explicit and measurable
  • Are there secondary or optional tasks?
  • What should the user provide as input? (selection, file, parameters, etc.)
  • What constraints or requirements must be followed?

4. Context & Variable Requirements

  • Will it use ${selection} (user's selected code)?
  • Will it use ${file} (current file) or other file references?
  • Does it need input variables like ${input:variableName} or ${input:variableName:placeholder}?
  • Will it reference workspace variables (${workspaceFolder}, etc.)?
  • Does it need to access other files or prompt files as dependencies?

5. Detailed Instructions & Standards

  • What step-by-step process should Copilot follow?
  • Are there specific coding standards, frameworks, or libraries to use?
  • What patterns or best practices should be enforced?
  • Are there things to avoid or constraints to respect?
  • Should it follow any existing instruction files (.instructions.md)?

6. Output Requirements

  • What format should the output be? (code, markdown, JSON, structured data, etc.)
  • Should it create new files? If so, where and with what naming convention?
  • Should it modify existing files?
  • Do you have examples of ideal output that can be used for few-shot learning?
  • Are there specific formatting or structure requirements?

7. Tool & Capability Requirements

Which tools does this prompt need? Common options include:

  • File Operations: codebase, editFiles, search, problems
  • Execution: runCommands, runTasks, runTests, terminalLastCommand
  • External: fetch, githubRepo, openSimpleBrowser
  • Specialized: playwright, usages, vscodeAPI, extensions
  • Analysis: changes, findTestFiles, testFailure, searchResults

8. Technical Configuration

  • Should this run in a specific mode? (agent, ask, edit)
  • Does it require a specific model? (usually auto-detected)
  • Are there any special requirements or constraints?

9. Quality & Validation Criteria

  • How should success be measured?
  • What validation steps should be included?
  • Are there common failure modes to address?
  • Should it include error handling or recovery steps?

Best Practices Integration

Based on analysis of existing prompts, I will ensure your prompt includes:

Clear Structure: Well-organized sections with logical flow

Specific Instructions: Actionable, unambiguous directions

Proper Context: All necessary information for task completion

Tool Integration: Appropriate tool selection for the task

Error Handling: Guidance for edge cases and failures

Output Standards: Clear formatting and structure requirements

Validation: Criteria for measuring success

Maintainability: Easy to update and extend

Next Steps

Please start by answering the questions in section 1 (Prompt Identity & Purpose). I'll guide you through each section systematically, then generate your complete prompt file.

Template Generation

After gathering all requirements, I will generate a complete .prompt.md file following this structure:

---

description: "[Clear, concise description from requirements]"

agent: "[agent|ask|edit based on task type]"

tools: ["[appropriate tools based on functionality]"]

model: "[only if specific model required]"

---

# [Prompt Title]

[Persona definition - specific role and expertise]

## [Task Section]

[Clear task description with specific requirements]

## [Instructions Section]

[Step-by-step instructions following established patterns]

## [Context/Input Section]

[Variable usage and context requirements]

## [Output Section]

[Expected output format and structure]

## [Quality/Validation Section]

[Success criteria and validation steps]

The generated prompt will follow patterns observed in high-quality prompts like:

  • Comprehensive blueprints (architecture-blueprint-generator)
  • Structured specifications (create-github-action-workflow-specification)
  • Best practice guides (dotnet-best-practices, csharp-xunit)
  • Implementation plans (create-implementation-plan)
  • Code generation (playwright-generate-test)

Each prompt will be optimized for:

  • AI Consumption: Token-efficient, structured content
  • Maintainability: Clear sections, consistent formatting
  • Extensibility: Easy to modify and enhance
  • Reliability: Comprehensive instructions and error handling

Please start by telling me the name and description for the new prompt you want to build.

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