Refine Cache Components and Partial Prefetching adoption skills (#95817)
Refinements to the Cache Components and Partial Prefetching adoption
skills from running them cold against real apps, plus the doc changes
they lean on.
**Skills**
- PPF: URL-data sweep reworked to feature-by-feature with a resumable
hand-off, and the requires section now says unfinished Cache Components
adoption doesn't gate the skill. Prerender insights are non-blocking dev
signals expected on a fresh branch; only a build-blocking failure stops
the run.
- PPF: install `next-dev-loop` without asking, and verify a real blocker
before falling back.
- CC: dropped the hard-coded `agent-browser` version pin; updated the
PPF cross-reference to the current enable-first flow.
**Docs**
- `runtime-prefetching`: the per-card server cost of `allow-runtime`
grids is specific to `prefetch={true}`, with hover-triggered prefetch as
the mitigation.
- `use-cache`: the request-API restriction follows the call stack
(`next-request-in-use-cache`, can pass build and fail under `next
start`), and the nested-`cacheLife` build error with its fix.
- `instant` route segment config: removed a stale `version: draft` so
the page publishes.
<!-- NEXT_JS_LLM_PR -->