← Notes

What a technical suggestion does not bring with it

Every architecture recommendation embeds a trade-off, and the trade-off is only settled with numbers from the system of whoever receives the suggestion — numbers the suggester does not have.

An architecture suggestion arrives as a statement and is, in fact, a hypothesis about a system the suggester has not measured.

The public guidance on building with models is explicit about the nature of the choice: "Agentic systems often trade latency and cost for better task performance, and you should consider when this tradeoff makes sense". The word carrying the weight is when. There is no universal answer; there is an answer per system, depending on where the time and the money are going in that system.

And the numbers that settle it are specific and measurable. The serving metrics documentation decomposes the latency the user feels: "End-to-End Latency = Time to First Token + Total Generation Time". A suggestion to swap the search mechanism moves a fraction of the first term. If the second term dominates, the suggestion is technically correct and practically irrelevant — both at once.

What that implies about receiving suggestions: they are good as hypotheses and bad as plans. The mature answer to one is rarely "I will do it" or "I will not do it". It is "I will measure the term you are pointing at" — cheaper than implementing and more honest than ignoring.