feature-briefing

Orchestrates a briefing before building a new feature - brainstorming with the owner, parallel researcher, consistency-auditor and specialist subagents to contrast docs, code, requirements and external practice, then an options decision and an implementation plan stress-tested by pre-mortem. Use when asked how to approach or plan a new feature or significant change that needs evidence from several sources, or to compare ways of doing something before committing; small features go straight to Superpowers brainstorming or writing-plans. Load it before planning so evidence is gathered in parallel and the decision is recorded.