docs: describe grilling as round-by-round everywhere

The round-by-round rework left the wrappers and callers still promising
a one-question-at-a-time interview. Sync grill-me, grill-with-docs and
triage (docs + skill step), plus grilling's Codex short_description and
the loop-me draft.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/productivity/grill-me.md

@@ -14,7 +14,7 @@ npx skills update grill-me
 
 `grill-me` runs a relentless interview about a plan or design, walking every branch of the decision tree until you and the agent reach a **shared understanding**.
 
-It asks **one question at a time** and waits. It never dumps a batch of questions at you — that is bewildering — and where a question can be answered by reading the codebase, it goes and reads rather than asking. Each question comes with the agent's own recommended answer, so you are reacting to a proposal, not staring at a blank prompt.
+It asks in **rounds** and waits. A round is the whole **frontier** — every decision whose prerequisites are already settled — put to you as one numbered list, so you're never asked something that hinges on an answer the agent hasn't heard yet. Where a question can be answered by reading the codebase, it goes and reads rather than asking. Each question comes with the agent's own recommended answer, so you are reacting to a proposal, not staring at a blank prompt.
 
 ## When to reach for it
 
@@ -24,7 +24,7 @@ Reach for it before you build, when a plan feels roughly right but you can sense
 
 ## The decision tree
 
-The session walks the plan as a tree of decisions, resolving dependencies between them one by one — a parent decision settled before the choices that hang off it. The point is not to reach agreement quickly; it is to make every implicit call explicit, so nothing important is left silently assumed. You come out the other side with a plan whose branches have all been visited.
+The session walks the plan as a tree of decisions, settling a parent decision before the choices that hang off it. Your answers reshape the tree and push the frontier outward, so the next round asks whatever they unblocked. The point is not to reach agreement quickly; it is to make every implicit call explicit, so nothing important is left silently assumed. You come out the other side with a plan whose branches have all been visited.
 
 `grill-me` is **stateless**: it writes nothing and leaves no workspace behind. It runs anywhere, and the only artifact is the sharpened understanding in the conversation itself. That is the deliberate contrast with [grill-with-docs](https://aihero.dev/skills-grill-with-docs), which captures the same interview as durable ADRs and a glossary.