Clamp requested generation to the usable context after prompt sync while preserving the legacy 256-token fallback for omitted limits.
Constrain each speculative MTP cycle to the remaining request budget so accepted tokens cannot advance beyond the visible output limit.
Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Claudio Maradonna <git@codeshifter.xyz>
