A customer asks “what does a first session at Aare Physio cost?”
What the model was given
Instructions
14 retrieved pageswhole site
Everything the crawler could find, newest first, nothing dropped.
The price9th of 14
A first session costs CHF 120 and includes the initial assessment.
Chat history12 turns
The question
Where attention holds
start middle end more reliably used
The price is in there. It is sitting in the stretch a model draws on least reliably.
The sag is a documented effect, not a rule of physics — the curve here shows its shape, not measured values. After Liu et al., “Lost in the Middle” (2023).
The assistant hedges: it says prices vary and suggests calling — with the number two thousand words back, in the middle of everything else.
Nothing was missing. That is what makes this failure hard to see: the fact was supplied, the model simply never leaned on it. More context is not the same as better context.
What the model was given
Instructions
3 retrieved passagesbest matches
The eleven that answered nothing were left out on purpose.
History, summarised4 lines
The pricelast before the question
A first session costs CHF 120 and includes the initial assessment.
The question
Where attention holds
start middle end more reliably used
Same sentence, same model. It now sits where the model reads most closely — right before the question.
The sag is a documented effect, not a rule of physics — the curve here shows its shape, not measured values. After Liu et al., “Lost in the Middle” (2023).
The assistant answers plainly: CHF 120 for a first session, initial assessment included — and names Aare Physio as the source.
Nothing was added. Eleven pages were removed and one sentence was moved. That edit — choosing what the model may look at, and in what order — is the whole of context engineering.