#687 encoded 'agy bounded ONLY by --print-timeout, no external killer' and
'inline -p "$(cat)"'. Documentation since then (see PR description) shows:
* agy's own print-mode guidance pairs --print-timeout with an external
terminal 'timeout' (it cannot fire pre-session);
* agy gained --model in ~1.0.3 (#3782's 'no --model' note was correct then,
stale now);
* inline "$(cat)" overflows the exec arg list on a large review prompt.
Rewrite the #687 describe block to the new contract (file-reference prompt +
--print-timeout PAIRED with a >= external timeout + --model + discard-on-
nonzero), and regenerate the 16 golden install-parity fixtures (only the
review.md hash line changed per runtime).
6ae23ffc21