upsert-plan

@geemus

Creates and updates detailed, structured work plans as GitHub issues. Use when the user wants to plan a feature, bug fix, project, or any body of work — also triggered by "make a plan", "scope out this work", "break down this task", "help me plan", or "create a GitHub issue for this". In update mode (triggered by an issue number or URL), edits the issue in place and posts a change-summary comment. DO NOT TRIGGER when: user asks to create, update, or delete a skill (use upsert-skill instead).