plan-workflow

# plan-workflow (PREVIEW Dynamic Workflow asset) **Preview / experimental.** `plan.workflow.js` is the autonomous-planning chain, invoked by `/lets:plan-workflow` via: ``` Workflow({ scriptPath: "${CLAUDE_PLUGIN_ROOT}/skills/plan-workflow/plan.workflow.js", args }) ``` It runs the autonomous design without touching the heavily-used interactive `/lets:plan`. Once stable (after cross-project testing), the asset folds into native `/lets:plan` (as a `--workflow` mode or equivalent) and this standalone is retired (lets-jsw00). ## Why this is autonomous-only (not a re-skin of review/opinion) `/lets:review --workflow` and `/lets:opinion --workflow` are performance levers: same result, off-context. Native `/lets:plan` is interactive (clarify -> explore -> approaches -> architecture -> eval -> discuss); every checkpoint forces intermediate results back into context, which kills the off-context win. So the only workflow that pays off is the **autonomous whole-command** form: the user front-loads a RUBRIC, judge agents make the informed picks against it, and the run returns a plan + decision log. Steer-by-rubric + approve-at-end. ## Stages (off-context, NO user gate between them) 1. **Explore** - fan out `lets:explorer` per focus area (`EXPLORE_SCHEMA`) -> codebase map. 2. **Approaches** - one `lets:architect` synthesizes 2-4 distinct approaches from the map + goal + rubric (`APPROACHES_SCHEMA`). 3. **Architect** - one `lets:architect` per approach -> full architecture (`ARCH_SCH...