{
  "schema": "s2s-bench-v1",
  "exhibit": "chair-trials",
  "published_utc": "2026-08-13",
  "status": "PUBLISHED — live at research.strata2signal.com.",
  "licence": "CC BY 4.0",
  "attribution": "strata→signal research, research.strata2signal.com",
  "hardware": "One 96G VRAM workstation, which also answered live requests for three of our apps throughout these trials — two public, one serving playtests for humans and agents alike. Contention is measured in both directions and published with the figures rather than assumed away.",
  "dataset": "chair-trials-c3-example-trace",
  "what_this_is": "One complete transcript, published whole so the per-task calls in c3-toolbench.json can be read for what they are: a four-step chain, answered, with every round the model took and every call it made.",
  "arm": {
    "model": "gemma4:12b",
    "posture": "think:false",
    "task_id": "t08-chain-list-read-calculate",
    "repeat": 1
  },
  "trace": {
    "task_id": "t08-chain-list-read-calculate",
    "category": "chain",
    "model": "gemma4:12b",
    "posture": "think_false",
    "think": false,
    "reasoning_strength": null,
    "repeat": 1,
    "prompt": "Look in the ledger directory, read the harbour ledger, and tell me the total of all the outgoing amounts, in shillings.",
    "system_prompt_sha256": "7b38278b7435b84b2e872b7f61281c24288ba8148ae2b18030d08e399486294c",
    "tools_sha256": "37a3d20f99a366413a6be7b69be7d80ff2a7cb642c8abf8dcd90d7f81189941b",
    "tool_count": 10,
    "rounds_used": 4,
    "max_rounds": 8,
    "stop_reason": "answered",
    "transport_error": null,
    "final_answer": "The total of all outgoing amounts in the harbour ledger is 1,195 shillings.",
    "calls": [
      {
        "seq": 1,
        "round": 1,
        "tool": "list_dir",
        "arguments": {
          "path": "ledger"
        },
        "arguments_were_string": false,
        "ok": true,
        "error_type": null,
        "allowlist_blocked": false,
        "injected": false,
        "result_summary": "{\"path\": \"ledger\", \"recursive\": false, \"entries\": [{\"path\": \"ledger/ledger-notes.md\", \"type\": \"file\", \"bytes\": 398}, {\"path\": \"ledger/ledger.csv\", \"type\": \"file\", \"bytes\": 394}]}"
      },
      {
        "seq": 2,
        "round": 2,
        "tool": "read_file",
        "arguments": {
          "path": "ledger/ledger.csv"
        },
        "arguments_were_string": false,
        "ok": true,
        "error_type": null,
        "allowlist_blocked": false,
        "injected": false,
        "result_summary": "{\"path\": \"ledger/ledger.csv\", \"line_span\": [1, 9], \"total_lines\": 9, \"content\": \"date,account,description,amount_shillings\\n2026-07-28,stores,lamp oil delivery,-312\\n2026-07-30,berthing,Grey Petrel berth fee,180\\n2026-08-01,stores,hemp rope resupply,-96\\n2026-08-02,repairs,B4 fender replacement,-244\\n2026-08-03,berthing,Salt Wren berth fee,150\\n2026-08-05,stores,salt cod purchase,-410\\n2026-08-07,berthing,Tide Cutter berth fee,205\\n2026-08-09,repairs,crane cable inspection,-133\"}"
      },
      {
        "seq": 3,
        "round": 3,
        "tool": "calculator",
        "arguments": {
          "expression": "312 + 96 + 244 + 410 + 133"
        },
        "arguments_were_string": false,
        "ok": true,
        "error_type": null,
        "allowlist_blocked": false,
        "injected": false,
        "result_summary": "{\"expression\": \"312 + 96 + 244 + 410 + 133\", \"value\": 1195}"
      }
    ],
    "rounds": [
      {
        "round": 1,
        "wall_s": 0.754,
        "done_reason": "stop",
        "eval_count": 15,
        "prompt_eval_count": 1539,
        "total_duration_ns": 752244863,
        "content": "",
        "thinking": "",
        "tool_call_count": 1,
        "parse_problems": [],
        "response": {
          "model": "gemma4:12b",
          "created_at": "2026-08-12T22:26:42.906807848Z",
          "message": {
            "role": "assistant",
            "content": "",
            "tool_calls": [
              {
                "id": "call_9fy973il",
                "function": {
                  "index": 0,
                  "name": "list_dir",
                  "arguments": {
                    "path": "ledger"
                  }
                }
              }
            ]
          },
          "done": true,
          "done_reason": "stop",
          "total_duration": 752244863,
          "load_duration": 418347805,
          "prompt_eval_count": 1539,
          "prompt_eval_duration": 177348000,
          "eval_count": 15,
          "eval_duration": 148967000
        }
      },
      {
        "round": 2,
        "wall_s": 0.834,
        "done_reason": "stop",
        "eval_count": 23,
        "prompt_eval_count": 1626,
        "total_duration_ns": 831718842,
        "content": "",
        "thinking": "",
        "tool_call_count": 1,
        "parse_problems": [],
        "response": {
          "model": "gemma4:12b",
          "created_at": "2026-08-12T22:26:43.741251407Z",
          "message": {
            "role": "assistant",
            "content": "",
            "tool_calls": [
              {
                "id": "call_eidiaz0v",
                "function": {
                  "index": 0,
                  "name": "read_file",
                  "arguments": {
                    "path": "ledger/ledger.csv"
                  }
                }
              }
            ]
          },
          "done": true,
          "done_reason": "stop",
          "total_duration": 831718842,
          "load_duration": 428028952,
          "prompt_eval_count": 1626,
          "prompt_eval_duration": 173862000,
          "eval_count": 23,
          "eval_duration": 221640000
        }
      },
      {
        "round": 3,
        "wall_s": 0.975,
        "done_reason": "stop",
        "eval_count": 38,
        "prompt_eval_count": 1890,
        "total_duration_ns": 973092843,
        "content": "",
        "thinking": "",
        "tool_call_count": 1,
        "parse_problems": [],
        "response": {
          "model": "gemma4:12b",
          "created_at": "2026-08-12T22:26:44.716855747Z",
          "message": {
            "role": "assistant",
            "content": "",
            "tool_calls": [
              {
                "id": "call_rod5uhyv",
                "function": {
                  "index": 0,
                  "name": "calculator",
                  "arguments": {
                    "expression": "312 + 96 + 244 + 410 + 133"
                  }
                }
              }
            ]
          },
          "done": true,
          "done_reason": "stop",
          "total_duration": 973092843,
          "load_duration": 405635042,
          "prompt_eval_count": 1890,
          "prompt_eval_duration": 183512000,
          "eval_count": 38,
          "eval_duration": 375483000
        }
      },
      {
        "round": 4,
        "wall_s": 0.823,
        "done_reason": "stop",
        "eval_count": 24,
        "prompt_eval_count": 1970,
        "total_duration_ns": 820995151,
        "content": "The total of all outgoing amounts in the harbour ledger is 1,195 shillings.",
        "thinking": "",
        "tool_call_count": 0,
        "parse_problems": [],
        "response": {
          "model": "gemma4:12b",
          "created_at": "2026-08-12T22:26:45.539741504Z",
          "message": {
            "role": "assistant",
            "content": "The total of all outgoing amounts in the harbour ledger is 1,195 shillings."
          },
          "done": true,
          "done_reason": "stop",
          "total_duration": 820995151,
          "load_duration": 401503987,
          "prompt_eval_count": 1970,
          "prompt_eval_duration": 178211000,
          "eval_count": 24,
          "eval_duration": 232606000
        }
      }
    ],
    "notes_after": {},
    "done_reason_length_rounds": [],
    "law_record": {
      "num_ctx": 32768,
      "think": false,
      "reasoning_strength": null,
      "stream": false,
      "allow_keep_alive": false,
      "keep_alive": null,
      "format": null
    }
  },
  "contamination_caveat": "Published 2026-08-13. Models with a later training cutoff may have seen these sets. We author fresh sets each cycle; this one is not a standard, it is our kit, yours to reuse.",
  "not_a_standard": "Our own trials, our own hardware, for our own chairs. Not first independent numbers, and not a benchmark."
}