{ "schema_version": 1, "tool_version": "0.1.0-browser-core", "scope": "offline_exact_string_comparison_browser_core", "inputs": { "left": { "file_name": null, "sha256": null, "headers": [ "SKU", "Name", "Price", "Qty" ], "data_records": 7, "byte_length": 179 }, "right": { "file_name": null, "sha256": null, "headers": [ "item_code", "product_name", "unit_price", "available" ], "data_records": 5, "byte_length": 157 } }, "mapping": { "schema_version": 1, "key": { "left": "SKU", "right": "item_code" }, "fields": { "title": { "left": "Name", "right": "product_name" }, "price": { "left": "Price", "right": "unit_price" }, "stock": { "left": "Qty", "right": "available" } } }, "policy": { "sku_match": "case-sensitive exact raw string; no trimming, Unicode normalization, or fuzzy matching", "missing_sku": "empty or Python-compatible whitespace-only key; retained and never paired", "duplicates": "any duplicate exact SKU on either side makes the entire group ambiguous; even identical duplicate records are not paired", "field_comparison": "exact raw strings, including whitespace; no numeric, currency, date, or variant interpretation", "record_numbers": "one-based CSV data-record numbers excluding the header, not physical line numbers", "formula_strings": "preserved, flagged as advisory, never evaluated; no CSV/store-import output is generated" }, "summary": { "left_data_records": 7, "right_data_records": 5, "matched_unique_skus": 3, "unchanged_unique_skus": 1, "changed_unique_skus": 2, "field_differences": 2, "ambiguous_sku_groups": 1, "missing_sku_records": 1, "left_only_skus": 1, "right_only_skus": 1, "formula_like_values": 0, "difference_items": 6, "records_reconciled": true }, "differences": [ { "classification": "missing_sku", "sku": "", "left_record_numbers": [ 5 ], "right_record_numbers": [], "fields": [ { "field": "$sku", "left_column": "SKU", "right_column": "item_code", "left_values": [ { "record_number": 5, "raw_value": "", "value_state": "empty_string" } ], "right_values": [] }, { "field": "title", "left_column": "Name", "right_column": "product_name", "left_values": [ { "record_number": 5, "raw_value": "Missing key", "value_state": "text" } ], "right_values": [] }, { "field": "price", "left_column": "Price", "right_column": "unit_price", "left_values": [ { "record_number": 5, "raw_value": "3.00", "value_state": "text" } ], "right_values": [] }, { "field": "stock", "left_column": "Qty", "right_column": "available", "left_values": [ { "record_number": 5, "raw_value": "1", "value_state": "text" } ], "right_values": [] } ], "pairing": "not_paired" }, { "classification": "field_value_changed", "sku": "00123", "left_record_numbers": [ 1 ], "right_record_numbers": [ 1 ], "fields": [ { "field": "stock", "left_column": "Qty", "right_column": "available", "left_values": [ { "record_number": 1, "raw_value": "0", "value_state": "text" } ], "right_values": [ { "record_number": 1, "raw_value": "", "value_state": "empty_string" } ] } ], "pairing": "one_to_one" }, { "classification": "field_value_changed", "sku": "A10", "left_record_numbers": [ 2 ], "right_record_numbers": [ 2 ], "fields": [ { "field": "price", "left_column": "Price", "right_column": "unit_price", "left_values": [ { "record_number": 2, "raw_value": "9.00", "value_state": "text" } ], "right_values": [ { "record_number": 2, "raw_value": "10.00", "value_state": "text" } ] } ], "pairing": "one_to_one" }, { "classification": "ambiguous_sku", "sku": "DUP", "left_record_numbers": [ 3, 4 ], "right_record_numbers": [ 3 ], "fields": [ { "field": "$sku", "left_column": "SKU", "right_column": "item_code", "left_values": [ { "record_number": 3, "raw_value": "DUP", "value_state": "text" }, { "record_number": 4, "raw_value": "DUP", "value_state": "text" } ], "right_values": [ { "record_number": 3, "raw_value": "DUP", "value_state": "text" } ] }, { "field": "title", "left_column": "Name", "right_column": "product_name", "left_values": [ { "record_number": 3, "raw_value": "Storage box", "value_state": "text" }, { "record_number": 4, "raw_value": "Storage box", "value_state": "text" } ], "right_values": [ { "record_number": 3, "raw_value": "Storage box", "value_state": "text" } ] }, { "field": "price", "left_column": "Price", "right_column": "unit_price", "left_values": [ { "record_number": 3, "raw_value": "5.00", "value_state": "text" }, { "record_number": 4, "raw_value": "6.00", "value_state": "text" } ], "right_values": [ { "record_number": 3, "raw_value": "5.00", "value_state": "text" } ] }, { "field": "stock", "left_column": "Qty", "right_column": "available", "left_values": [ { "record_number": 3, "raw_value": "3", "value_state": "text" }, { "record_number": 4, "raw_value": "3", "value_state": "text" } ], "right_values": [ { "record_number": 3, "raw_value": "3", "value_state": "text" } ] } ], "pairing": "not_paired" }, { "classification": "right_only", "sku": "NEW", "left_record_numbers": [], "right_record_numbers": [ 4 ], "fields": [ { "field": "$sku", "left_column": "SKU", "right_column": "item_code", "left_values": [], "right_values": [ { "record_number": 4, "raw_value": "NEW", "value_state": "text" } ] }, { "field": "title", "left_column": "Name", "right_column": "product_name", "left_values": [], "right_values": [ { "record_number": 4, "raw_value": "New item", "value_state": "text" } ] }, { "field": "price", "left_column": "Price", "right_column": "unit_price", "left_values": [], "right_values": [ { "record_number": 4, "raw_value": "2.00", "value_state": "text" } ] }, { "field": "stock", "left_column": "Qty", "right_column": "available", "left_values": [], "right_values": [ { "record_number": 4, "raw_value": "5", "value_state": "text" } ] } ], "pairing": "no_counterpart" }, { "classification": "left_only", "sku": "OLD", "left_record_numbers": [ 6 ], "right_record_numbers": [], "fields": [ { "field": "$sku", "left_column": "SKU", "right_column": "item_code", "left_values": [ { "record_number": 6, "raw_value": "OLD", "value_state": "text" } ], "right_values": [] }, { "field": "title", "left_column": "Name", "right_column": "product_name", "left_values": [ { "record_number": 6, "raw_value": "Retired item", "value_state": "text" } ], "right_values": [] }, { "field": "price", "left_column": "Price", "right_column": "unit_price", "left_values": [ { "record_number": 6, "raw_value": "7.00", "value_state": "text" } ], "right_values": [] }, { "field": "stock", "left_column": "Qty", "right_column": "available", "left_values": [ { "record_number": 6, "raw_value": "3", "value_state": "text" } ], "right_values": [] } ], "pairing": "no_counterpart" } ], "unchanged_matches": [ { "sku": "SAME", "left_record_number": 7, "right_record_number": 5 } ], "notices": [], "limitations": [ "Only mapped fields are compared; other columns are not judged equal", "Difference/advisory values and references are not complete original-file backups", "Core tests do not establish browser UI behavior, source truth, paid-user acceptance, or sale readiness", "No network calls, source edits, Shopify import file, or automated corrections" ] }