Ideal content to place in a cacheable prefix includes:

Question

Accepted Answer

Stable system instructions, tool schemas, and shared reference docs — Cache the stable spine: system, tools, shared docs — not per-request nonces up front.

Answer

Per-user one-time random nonces only at the start every time

Answer

Only the last user keystroke

Answer

Changing timestamps as the first characters every request

Ideal content to place in a cacheable prefix includes:

Short Explanation and Infographic

Full Explanation