{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Debug Log Entry Schema",
  "description": "NDJSON log entry for hypothesis-driven debugging workflow",
  "type": "object",
  "required": [
    "sessionId",
    "runId",
    "hypothesisId",
    "location",
    "message",
    "data",
    "timestamp"
  ],
  "properties": {
    "sessionId": {
      "type": "string",
      "pattern": "^DBG-[a-z0-9-]+-\\d{4}-\\d{2}-\\d{2}$",
      "description": "Debug session identifier (e.g., 'DBG-stack-length-not-found-2025-12-18')"
    },
    "runId": {
      "type": "string",
      "pattern": "^run-\\d+$",
      "description": "Reproduction run number (e.g., 'run-1', 'run-2')"
    },
    "hypothesisId": {
      "type": "string",
      "pattern": "^H\\d+$",
      "description": "Hypothesis identifier being tested (e.g., 'H1', 'H2')"
    },
    "location": {
      "type": "string",
      "description": "Code location in format 'file:function:line' or 'file:line'"
    },
    "message": {
      "type": "string",
      "description": "Human-readable description of what's being logged"
    },
    "data": {
      "type": "object",
      "additionalProperties": true,
      "description": "Captured values for hypothesis validation",
      "properties": {
        "keys_sample": {
          "type": "array",
          "items": {"type": "string"},
          "description": "Sample of dictionary/object keys (first 30)"
        },
        "value": {
          "description": "Captured value (any type)"
        },
        "expected_value": {
          "description": "Expected value for comparison"
        },
        "actual_type": {
          "type": "string",
          "description": "Actual type of captured value"
        },
        "count": {
          "type": "integer",
          "description": "Count of items (for arrays/collections)"
        },
        "is_null": {
          "type": "boolean",
          "description": "Whether value is null/None"
        },
        "is_empty": {
          "type": "boolean",
          "description": "Whether collection is empty"
        },
        "comparison_result": {
          "type": "string",
          "enum": ["match", "mismatch", "partial_match"],
          "description": "Result of value comparison"
        }
      }
    },
    "timestamp": {
      "type": "integer",
      "description": "Unix timestamp in milliseconds"
    },
    "severity": {
      "type": "string",
      "enum": ["debug", "info", "warning", "error"],
      "default": "info",
      "description": "Log severity level"
    },
    "stack_trace": {
      "type": "string",
      "description": "Stack trace if capturing exception context"
    },
    "parent_entry_id": {
      "type": "string",
      "description": "Reference to parent log entry for nested contexts"
    }
  },
  "examples": [
    {
      "sessionId": "DBG-stack-length-not-found-2025-12-18",
      "runId": "run-1",
      "hypothesisId": "H1",
      "location": "rmxprt_api/core/rmxprt_parameter.py:sync_from_machine:642",
      "message": "Inspect stator keys from machine.to_dict and compare Stack Length vs Length",
      "data": {
        "keys_sample": ["Length", "Outer Diameter", "Inner Diameter", "Slot"],
        "stack_length_value": "未找到",
        "length_value": "120mm",
        "comparison_result": "mismatch"
      },
      "timestamp": 1734523456789
    },
    {
      "sessionId": "DBG-registered-zero-2025-12-18",
      "runId": "run-1",
      "hypothesisId": "H2",
      "location": "rmxprt_api/utils/param_core.py:update_variables_from_result_model:670",
      "message": "Check result parameters count and sample keys",
      "data": {
        "count": 0,
        "is_empty": true,
        "sections_parsed": ["Stator", "Rotor", "General"],
        "expected_count": 145
      },
      "timestamp": 1734523457123
    }
  ]
}