{
  "source": "session.json",
  "segments": [
    {
      "id": 1,
      "event": null,
      "actor": "system",
      "turn": null,
      "kind": "system",
      "label": "System prompt + tool schemas",
      "chars": null,
      "in_log": false,
      "note": "Injected by the harness on every request. Not stored in the local session log."
    },
    {
      "id": 2,
      "event": 1,
      "actor": "human",
      "turn": null,
      "kind": "text",
      "label": "Human prompt",
      "chars": 120,
      "in_log": true
    },
    {
      "id": 3,
      "event": 2,
      "actor": "agent",
      "turn": 1,
      "kind": "text",
      "label": "Agent message",
      "chars": 84,
      "in_log": true
    },
    {
      "id": 4,
      "event": 2,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Read",
      "label": "Agent tool call: Read app/search.py",
      "chars": 57,
      "in_log": true
    },
    {
      "id": 5,
      "event": 3,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Read",
      "chars": 279,
      "in_log": true
    },
    {
      "id": 6,
      "event": 4,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Write",
      "label": "Agent tool call: Write app/ratelimit.py",
      "chars": 702,
      "in_log": true
    },
    {
      "id": 7,
      "event": 5,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Write",
      "chars": 46,
      "in_log": true
    },
    {
      "id": 8,
      "event": 6,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Edit",
      "label": "Agent tool call: Edit app/search.py",
      "chars": 260,
      "in_log": true
    },
    {
      "id": 9,
      "event": 7,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Edit",
      "chars": 40,
      "in_log": true
    },
    {
      "id": 10,
      "event": 8,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Edit",
      "label": "Agent tool call: Edit app/search.py",
      "chars": 239,
      "in_log": true
    },
    {
      "id": 11,
      "event": 9,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Edit",
      "chars": 40,
      "in_log": true
    },
    {
      "id": 12,
      "event": 10,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Write",
      "label": "Agent tool call: Write tests/test_ratelimit.py",
      "chars": 756,
      "in_log": true
    },
    {
      "id": 13,
      "event": 11,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Write",
      "chars": 53,
      "in_log": true
    },
    {
      "id": 14,
      "event": 12,
      "actor": "agent",
      "turn": 1,
      "kind": "tool_use:Bash",
      "label": "Agent tool call: Bash python -m pytest -q",
      "chars": 61,
      "in_log": true
    },
    {
      "id": 15,
      "event": 13,
      "actor": "tool",
      "turn": 1,
      "kind": "tool_result",
      "label": "Tool result: Bash",
      "chars": 81,
      "in_log": true
    },
    {
      "id": 16,
      "event": 14,
      "actor": "agent",
      "turn": 1,
      "kind": "text",
      "label": "Agent message",
      "chars": 154,
      "in_log": true
    },
    {
      "id": 17,
      "event": 15,
      "actor": "human",
      "turn": null,
      "kind": "text",
      "label": "Human pushback",
      "chars": 151,
      "in_log": true
    },
    {
      "id": 18,
      "event": 16,
      "actor": "agent",
      "turn": 2,
      "kind": "text",
      "label": "Agent message",
      "chars": 133,
      "in_log": true
    },
    {
      "id": 19,
      "event": 16,
      "actor": "agent",
      "turn": 2,
      "kind": "tool_use:Edit",
      "label": "Agent tool call: Edit app/search.py",
      "chars": 235,
      "in_log": true
    },
    {
      "id": 20,
      "event": 17,
      "actor": "tool",
      "turn": 2,
      "kind": "tool_result",
      "label": "Tool result: Edit",
      "chars": 40,
      "in_log": true
    },
    {
      "id": 21,
      "event": 18,
      "actor": "agent",
      "turn": 2,
      "kind": "tool_use:Edit",
      "label": "Agent tool call: Edit tests/test_ratelimit.py",
      "chars": 505,
      "in_log": true
    },
    {
      "id": 22,
      "event": 19,
      "actor": "tool",
      "turn": 2,
      "kind": "tool_result",
      "label": "Tool result: Edit",
      "chars": 50,
      "in_log": true
    },
    {
      "id": 23,
      "event": 20,
      "actor": "agent",
      "turn": 2,
      "kind": "tool_use:Bash",
      "label": "Agent tool call: Bash python -m pytest -q",
      "chars": 61,
      "in_log": true
    },
    {
      "id": 24,
      "event": 21,
      "actor": "tool",
      "turn": 2,
      "kind": "tool_result",
      "label": "Tool result: Bash",
      "chars": 81,
      "in_log": true
    },
    {
      "id": 25,
      "event": 22,
      "actor": "agent",
      "turn": 2,
      "kind": "text",
      "label": "Agent message",
      "chars": 103,
      "in_log": true
    }
  ],
  "sft": {
    "unit": "characters, not tokens",
    "total_chars_in_log": 4331,
    "agent_authored_chars": 3350,
    "policies": {
      "final_turn_only": {
        "loss_on": [
          18,
          19,
          21,
          23,
          25
        ],
        "supervised_share": 0.239,
        "teaches": "The recovery after pushback. Turn 1 stays in the context but gets no loss."
      },
      "all_agent_turns": {
        "loss_on": [
          3,
          4,
          6,
          8,
          10,
          12,
          14,
          16,
          18,
          19,
          21,
          23,
          25
        ],
        "supervised_share": 0.773,
        "teaches": "Both turns, including the unguarded user.id that the human had to flag."
      },
      "hindsight_corrected": {
        "loss_on": [
          18,
          19,
          21,
          23,
          25
        ],
        "supervised_share": 0.239,
        "replaced_segment": 19,
        "original_new_string": "    key = f\"user:{user.id}\" if user else f\"ip:{request.client.host}\"\n    ratelimit.check(key)\n",
        "hindsight_new_string": "    key = f\"user:{user.id}\" if user else f\"ip:{client_ip(request)}\"\n    ratelimit.check(key)\n",
        "unseen_identifiers": [
          "client_ip"
        ],
        "unseen_identifiers_live_in": [
          "app/net.py"
        ],
        "teaches": "The human's version, emitted from a context in which its key identifiers never appeared."
      }
    }
  },
  "rl": {
    "reward_rule": "reward = persistence - 1[pushback]. Both weights are a design choice.",
    "baseline": 0.433,
    "turns": [
      {
        "turn": 1,
        "lines_written": 45,
        "lines_surviving_at_commit": 44,
        "persistence": 0.978,
        "pushback": true,
        "reward": -0.022,
        "gradient_touches": [
          3,
          4,
          6,
          8,
          10,
          12,
          14,
          16
        ],
        "advantage": -0.455
      },
      {
        "turn": 2,
        "lines_written": 9,
        "lines_surviving_at_commit": 8,
        "persistence": 0.889,
        "pushback": false,
        "reward": 0.889,
        "gradient_touches": [
          18,
          19,
          21,
          23,
          25
        ],
        "advantage": 0.456
      }
    ],
    "on_policy_note": "Only valid if the model being updated is the one that produced these turns."
  },
  "dpo": {
    "context_ids": [
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16,
      17
    ],
    "rejected_ids": [
      18,
      19,
      21,
      23,
      25
    ],
    "rejected_edit": "    key = f\"user:{user.id}\" if user else f\"ip:{request.client.host}\"\n    ratelimit.check(key)\n",
    "chosen_edit": "    key = f\"user:{user.id}\" if user else f\"ip:{client_ip(request)}\"\n    ratelimit.check(key)\n",
    "chosen_was_sampled_from_a_policy": false,
    "note": "The chosen response is the agent's turn with the human's edit applied. Nobody generated it."
  },
  "unrecorded": {
    "events": [
      23,
      24,
      25
    ],
    "diff": "--- a/app/search.py\n+++ b/app/search.py\n@@ -1,6 +1,7 @@\n from fastapi import APIRouter, Depends, Request\n \n from app import ratelimit\n+from app.net import client_ip\n from app.auth import current_user\n from app.index import query_index\n \n@@ -9,6 +10,6 @@\n \n @router.get(\"/search\")\n def search(q: str, request: Request, user=Depends(current_user)):\n-    key = f\"user:{user.id}\" if user else f\"ip:{request.client.host}\"\n+    key = f\"user:{user.id}\" if user else f\"ip:{client_ip(request)}\"\n     ratelimit.check(key)\n     return {\"results\": query_index(q, limit=20)}\n"
  }
}