gen-env Skill

Generate or review a gen-env command that enables running multiple isolated instances of a project on localhost simultaneously (e.g., multiple worktrees, feature branches, or versions).

The Problem

Without isolation, multiple instances of the same project:

• Fight for hardcoded ports (3000, 5432, 8080)
• Share Docker volumes → data corruption
• Share browser cookies/localStorage → auth confusion
• Have ambiguous container names → can't tell which is which
• Risk catastrophic cleanup → docker down -v nukes everything

The Solution: Instance Identity

Everything flows from a workspace name: