rem-execute

Execute an approved implementation plan with maximum discipline - git worktree isolation, TDD per task (RED to GREEN), complexity-scaled review, Codex delegation for mechanical work, one commit per task, and risk-scaled human checkpoints. Distinct from rem-plan (which WRITES the plan), rem-review-plan (which VALIDATES the plan before execution), rem-verify (which runs build/test without executing tasks), and rem-branch (which finishes the branch after execution). Use for "execute", "execute the plan", "run the plan", "implement the plan", "build it", or after /rem-review-plan sets Status to Approved.