fission-ai__openspec/openspec/changes/add-github-copilot-prompts/tasks.md

Implementation Tasks

• Create src/core/configurators/slash/github-copilot.ts implementing SlashCommandConfigurator base class

  • Implement getRelativePath() to return .github/prompts/openspec-{proposal,apply,archive}.prompt.md
  • Implement getFrontmatter() to generate YAML frontmatter with description field and include $ARGUMENTS placeholder
  • Implement generateAll() to create .github/prompts/ directory and write three prompt files with frontmatter, markers, and shared template bodies
  • Implement updateExisting() to refresh only the managed block between markers while preserving frontmatter
  • Set toolId = "github-copilot" and isAvailable = true

• Register GitHub Copilot configurator in src/core/configurators/slash/registry.ts

  • Import GitHubCopilotSlashCommandConfigurator
  • Add to SLASH_COMMAND_CONFIGURATORS array
  • Update tool picker display name to "GitHub Copilot"

• Update src/core/init.ts to include GitHub Copilot in the AI tool selection prompt

  • Add GitHub Copilot to the available tools list with detection for existing .github/prompts/openspec-*.prompt.md files
  • Display "(already configured)" when prompt files exist

• Update src/core/update.ts to refresh GitHub Copilot prompts when they exist

  • Call updateExisting() for GitHub Copilot configurator when .github/prompts/ contains OpenSpec prompt files

• Add integration tests for GitHub Copilot slash command generation

  • Test generateAll() creates three prompt files with correct structure (frontmatter + markers + body)
  • Test updateExisting() preserves frontmatter and only updates managed blocks
  • Test that missing prompt files are not created during update

• Update documentation

  • Add GitHub Copilot to README slash-command support table
  • Document .github/prompts/ as the discovery location
  • Add CHANGELOG entry for GitHub Copilot support