HAYSTACK ANSWER KEY
===================
This is the spoiler file for haystack.txt. Do not show it to the model you
are testing — it exists so the grader knows the right answer.

THE PLANTED FACT
  "The Meridian contract renewal costs $4,250 per quarter."

WHERE IT LIVES
  Section:   "VENDOR AND CONTRACT MANAGEMENT" (the document's 6th section).
  Lines:     175-176 of haystack.txt (the sentence wraps across the two
             lines: "...The Meridian / contract renewal costs $4,250 per
             quarter...").
  Position:  about 1,701 words into a ~2,918-word document — roughly 58%
             of the way through, i.e. buried in the middle, not near the
             start or the end.

HOW TO USE
  Paste the full haystack.txt into context, then ask a question only this
  sentence can answer, e.g.:
    "What does the Meridian contract renewal cost per quarter?"
  A passing answer states $4,250 per quarter. Anything else — a refusal, a
  guess, a different number, or "the document doesn't say" — is a miss, and
  tells you the fact fell outside what the model actually attended to.

  Vary the haystack size or the fact's position to probe the lost-in-the-
  middle effect: the same fact is easier to retrieve when it sits near the
  top or bottom of the context than when it sits, as here, in the middle.