{
  "experiment_id": "2-1",
  "protocol_version": "1.0.0",
  "frozen_on": "2026-07-30",
  "authority": "book/chapter2.md:363",
  "runtime": {
    "server": "Ollama native /api/generate",
    "model": "qwen3:0.6b",
    "reference_model": "Qwen/Qwen3-0.6B",
    "raw_mode": true,
    "temperature": 0,
    "num_predict": 512
  },
  "tool_case": {
    "prompt": "What are the current time and weather in Vancouver? Call both tools.",
    "required_tools": [
      "get_current_time",
      "get_current_temperature"
    ],
    "required_timezone": "America/Vancouver",
    "required_location": "Vancouver, Canada",
    "execution": "parallel"
  },
  "cache_case": {
    "approximate_prefix_tokens": 4096,
    "warmups": 2,
    "matched_repeats": 5,
    "hit": "byte-identical rendered prompt",
    "miss": "same-length unique mutation at the first bytes of the system prompt"
  },
  "acceptance_gates": [
    "the running server reports qwen3:0.6b with a nonempty immutable model digest",
    "the rendered prompt retains chat-template special tokens and tool schema",
    "the first raw response contains exactly the two required tool calls",
    "both tools execute concurrently and return auditable results",
    "the second model turn consumes both tool results and terminates without another tool call",
    "stream chunks, request prompts, timings, token counts, server durations, and hashes are retained",
    "matched hit and miss TTFT samples are retained without requiring a favorable outcome",
    "all execution is local except the read-only Open-Meteo weather lookup",
    "no credential is sent to or retained by the experiment"
  ],
  "claim_policy": {
    "tool_calling": "complete only when every tool/termination gate passes",
    "throughput": "report measured decode throughput; do not claim the manuscript's M2 >100 tok/s observation unless this run exceeds it on identified hardware",
    "kv_cache": "report the matched TTFT distribution even if the hit arm is not faster"
  }
}