Route by job, not by file size: the tool table fresh sessions needed

Oliver's concern, after the un-chunking: a fresh session walked straight into
_regen.py and diagnosed from there, twice — first the legacy prompts, then the
model's rolls — while the real bug sat in the cutter, provable by putting any
fam_ sheet next to the sprite cut from it. The family-pipeline section already
demoted _regen.py, but 270 lines below the "Asset pipeline" heading, and the
session memory that routed the last investigation pointed at _regen by name.

So the routing is now the FIRST thing under "## Asset pipeline": a
which-tool-for-which-job table that names _famroll -> _zsheet for families,
marks _regen.py as the single-sheet remaster tool it still is (bosses, players,
crowd, weapons — those jobs keep it alive, so it stays), and states the
diagnostic rule that would have saved two days: when installed art looks worse
than the _refcheck sheet it came from, the suspect is the CUT, and a re-cut is
free. _regen.py's own header says the same, for whoever opens it first anyway.

The "Only ink votes" lesson joins the family-pipeline section with the numbers:
0.0% of ink blocks uniform at b=11 against 99.2% of empty ones is how a
detector proven on single-row sheets quietly broke on 9-row geometry — the
threshold never changed, the data under it did.

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

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