llama-server only reuses a byte-identical prompt prefix. Several things
changed the prefix every turn, forcing most of the prompt to be re-prefilled:
- Memories: rank still chooses which memories fit the budget, but the chosen
ones are emitted in stored order, so the block is identical across queries.
- History trimming: the conversation-evidence summary is only included when
turns were actually dropped (it duplicated retained turns otherwise). On
overflow, old turns are dropped at stable cut points down to ~65% of the
budget, so the retained prefix holds for several turns instead of shifting
by one turn every request.
- Tools: TOOL_ROUTING_MODE=static (default) binds the full role-appropriate
tool set in registration order with no discovery tool; admin gating is
unchanged. TOOL_ROUTING_MODE=dynamic keeps the keyword router.
- Observability: per-call model_calls in the stream_request log now include
cached_prompt_tokens when the provider reports cache reads.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ryan
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