Add a GitHub repository as a tracked project — creates workspace entity, installs workflow automation missions, and includes in dev brief scope.
Add a new GitHub repository as a tracked project in the workspace and install workflow automation.
Extract owner/repo from the user's message. If ambiguous, ask. Validate via GitHub API: http(method="GET", url="https://api.github.com/repos/{owner}/{repo}"). If 404 or no access, tell the user.
staging if yes)Read main_branch from the API response's default_branch field.
Write projects/<owner>-<repo>/project.md:
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