{
  "schemaVersion": 1,
  "selectorVersion": "rarebit-selector-v1",
  "purpose": "Human-reviewed semantic examples for comparing Rarebit and adjacent projections without using an implementation as the oracle.",
  "capabilities": {
    "strictRarebit": ["core", "cli", "pi_extension"],
    "knownNonconformance": {
      "timeline": "selects matching physical JSONL entries without resolving the active branch"
    },
    "notRarebitProjections": {
      "live_detail_turns": "shows user messages and terminal assistant outcomes; it omits continuations and includes non-Rarebit terminal outcomes",
      "traffic_outcomes": "shows operational user and assistant request outcomes, including truncated outcomes"
    }
  },
  "cases": [
    {
      "id": "linear-prose-and-outcomes",
      "description": "User prose, assistant continuation, and normal stop are Rarebits; tool traffic, hidden reasoning, and exceptional terminal outcomes are not.",
      "records": [
        {
          "type": "session",
          "version": 2,
          "id": "session-linear",
          "timestamp": "2026-01-01T00:00:00.000Z",
          "cwd": "/example"
        },
        {
          "type": "message",
          "id": "u-linear",
          "parentId": null,
          "timestamp": "2026-01-01T00:00:01.000Z",
          "producer": "owner",
          "message": {
            "role": "user",
            "content": [
              { "type": "text", "text": "Compare the candidate renderers." }
            ]
          }
        },
        {
          "type": "message",
          "id": "a-continuation",
          "parentId": "u-linear",
          "timestamp": "2026-01-01T00:00:02.000Z",
          "message": {
            "role": "assistant",
            "timestamp": 1767225601500,
            "stopReason": "toolUse",
            "content": [
              {
                "type": "text",
                "text": "I will measure the current baseline."
              },
              {
                "type": "toolCall",
                "id": "call-1",
                "name": "benchmark",
                "arguments": {}
              }
            ]
          }
        },
        {
          "type": "message",
          "id": "tool-result",
          "parentId": "a-continuation",
          "timestamp": "2026-01-01T00:00:03.000Z",
          "message": {
            "role": "toolResult",
            "toolCallId": "call-1",
            "content": [{ "type": "text", "text": "machine result" }]
          }
        },
        {
          "type": "message",
          "id": "a-error",
          "parentId": "tool-result",
          "timestamp": "2026-01-01T00:00:04.000Z",
          "message": {
            "role": "assistant",
            "timestamp": 1767225603500,
            "stopReason": "error",
            "content": [{ "type": "text", "text": "The attempt failed." }]
          }
        },
        {
          "type": "message",
          "id": "a-stop",
          "parentId": "a-error",
          "timestamp": "2026-01-01T00:00:05.000Z",
          "message": {
            "role": "assistant",
            "timestamp": 1767225604500,
            "stopReason": "stop",
            "content": [
              { "type": "thinking", "thinking": "hidden reasoning" },
              { "type": "text", "text": "The baseline is ready for review." }
            ]
          }
        }
      ],
      "expected": {
        "activeBranchIds": [
          "u-linear",
          "a-continuation",
          "tool-result",
          "a-error",
          "a-stop"
        ],
        "rarebits": [
          {
            "sourceEntryId": "u-linear",
            "role": "user",
            "outcome": "user",
            "text": "Compare the candidate renderers."
          },
          {
            "sourceEntryId": "a-continuation",
            "role": "assistant",
            "outcome": "continuation",
            "text": "I will measure the current baseline."
          },
          {
            "sourceEntryId": "a-stop",
            "role": "assistant",
            "outcome": "stop",
            "text": "The baseline is ready for review."
          }
        ],
        "excludedEntryIds": ["tool-result", "a-error"]
      }
    },
    {
      "id": "fork-compaction-and-resume",
      "description": "The final entry is the active leaf. An abandoned fork and a compaction summary are not selected; messages before and after compaction remain eligible on the active lineage.",
      "records": [
        {
          "type": "session",
          "version": 2,
          "id": "session-fork",
          "timestamp": "2026-01-02T00:00:00.000Z",
          "cwd": "/example"
        },
        {
          "type": "message",
          "id": "u-root",
          "parentId": null,
          "timestamp": "2026-01-02T00:00:01.000Z",
          "message": {
            "role": "user",
            "content": "Start from the measured baseline."
          }
        },
        {
          "type": "message",
          "id": "a-shared",
          "parentId": "u-root",
          "timestamp": "2026-01-02T00:00:02.000Z",
          "message": {
            "role": "assistant",
            "stopReason": "toolUse",
            "content": "I will inspect the trace."
          }
        },
        {
          "type": "message",
          "id": "u-abandoned",
          "parentId": "a-shared",
          "timestamp": "2026-01-02T00:00:03.000Z",
          "message": {
            "role": "user",
            "content": "Try the abandoned direction."
          }
        },
        {
          "type": "message",
          "id": "a-abandoned",
          "parentId": "u-abandoned",
          "timestamp": "2026-01-02T00:00:04.000Z",
          "message": {
            "role": "assistant",
            "stopReason": "stop",
            "content": "Abandoned fork result."
          }
        },
        {
          "type": "message",
          "id": "u-resumed",
          "parentId": "a-shared",
          "timestamp": "2026-01-02T00:00:05.000Z",
          "message": {
            "role": "user",
            "content": "Resume on the shared branch."
          }
        },
        {
          "type": "compaction",
          "id": "compact-active",
          "parentId": "u-resumed",
          "timestamp": "2026-01-02T00:00:06.000Z",
          "summary": "Derived compaction text is not Rarebit evidence."
        },
        {
          "type": "message",
          "id": "a-active",
          "parentId": "compact-active",
          "timestamp": "2026-01-02T00:00:07.000Z",
          "message": {
            "role": "assistant",
            "stopReason": "stop",
            "content": "Active branch result."
          }
        }
      ],
      "expected": {
        "activeBranchIds": [
          "u-root",
          "a-shared",
          "u-resumed",
          "compact-active",
          "a-active"
        ],
        "rarebits": [
          {
            "sourceEntryId": "u-root",
            "role": "user",
            "outcome": "user",
            "text": "Start from the measured baseline."
          },
          {
            "sourceEntryId": "a-shared",
            "role": "assistant",
            "outcome": "continuation",
            "text": "I will inspect the trace."
          },
          {
            "sourceEntryId": "u-resumed",
            "role": "user",
            "outcome": "user",
            "text": "Resume on the shared branch."
          },
          {
            "sourceEntryId": "a-active",
            "role": "assistant",
            "outcome": "stop",
            "text": "Active branch result."
          }
        ],
        "excludedEntryIds": ["u-abandoned", "a-abandoned", "compact-active"]
      }
    }
  ],
  "failureCases": [
    {
      "id": "malformed-jsonl",
      "description": "A complete prefix followed by malformed JSON is unavailable to strict Rarebit readers, never an empty successful selection.",
      "lines": [
        "{\"type\":\"session\",\"version\":2,\"id\":\"session-malformed\"}",
        "{\"type\":\"message\",\"id\":\"u1\",\"parentId\":null,\"message\":{\"role\":\"user\",\"content\":\"complete prefix\"}}",
        "{\"type\":\"message\",\"id\":\"truncated\""
      ],
      "expected": {
        "strictStatus": "unavailable",
        "reason": "malformed_jsonl",
        "trafficDiagnostic": "malformed_jsonl"
      }
    },
    {
      "id": "missing-active-parent",
      "description": "An active leaf whose parent is absent is unavailable rather than a guessed partial branch.",
      "records": [
        { "type": "session", "version": 2, "id": "session-missing-parent" },
        {
          "type": "message",
          "id": "a-orphan",
          "parentId": "missing-parent",
          "message": {
            "role": "assistant",
            "stopReason": "stop",
            "content": "orphan"
          }
        }
      ],
      "expected": {
        "strictStatus": "unavailable",
        "reason": "missing_parent"
      }
    },
    {
      "id": "scan-capped",
      "description": "A consumer that did not inspect the complete required branch reports unavailable instead of a successful partial Rarebit set.",
      "expected": {
        "strictStatus": "unavailable",
        "reason": "scan_capped"
      }
    },
    {
      "id": "source-unavailable",
      "description": "An absent or unreadable source remains explicitly unavailable.",
      "expected": {
        "strictStatus": "unavailable",
        "reason": "source_unavailable"
      }
    }
  ]
}