rem-plan

Write a verification-first implementation plan that a fresh subagent could execute without session context. Audits existing capabilities before proposing new code, validates the riskiest assumption first, and gives every task a verification primitive matching its kind. Distinct from rem-review-plan (validates an existing plan) and rem-execute (runs an approved plan). Use for "plan", "implementation plan", "write a plan", "how should we build X", "break this down", "plan this feature", "plan the refactor", or any non-trivial feature, bug fix, or refactor.