Intent-Driven Systems Engineering (IDSE) methodology for structured software development. Use when users want to: (1) Plan a new feature or project systematically, (2) Create engineering artifacts (intent, context, spec, plan, tasks), (3) Move from vague ideas to structured implementation plans, (4) Generate specifications before writing code, (5) Break work into atomic testable tasks, (6) Follow a constitutional engineering approach. Triggers: 'help me plan', 'create a spec', 'IDSE', 'intent-driven', 'write a specification', 'break this into tasks', 'implementation plan', 'what should I build first', 'structured engineering', 'plan before code'.