Complete Truck X12 355 implementation (retry 1)

{
  "code": "X12 355 US Customs Entry Summary builder — SHIPPED.\n\nNew file: rosetta_core/x12_355.py (~370 lines)\n\nArchitecture:\n- Follows exact same pattern as x12_309.py (builder) and x12_350.py (parser)\n- Reuses x12_common.py envelope (ISA/GS/ST/SE/GE/IEA) + party segments (N1/N3/N4)\n- Takes EntrySummary7501 from declaration_engine → serializes to X12 7010 EDI\n- GS01 = \"SE\" (Entry Summary functional ID from x12_constants.py)\n\nSegments implemented (12 types):\n- BGN: Beginning segment (entry number, entry type)\n- DTM: Date references (import, entry, export dates)\n- N1/N3/N4: Importer (IM), Customs Broker (CB), Manufacturer (MF)\n- N9: Port code + transport mode, BOL reference\n- LIN: Line item (HTS code + country of origin)\n- SLN: Subline detail (entered value, duty rate, relationship)\n- QTY: Net quantity + statistical unit\n- AMT: Entered value, charges, duty, totals (T1/T2/GT)\n- TC2: CATAIR Appendix F computation codes (all 18 supported)\n- CTT: Transaction totals (line count + hash total)\n\nValidation:\n- Entry number length (11 chars)\n- Port code required\n- HTS per line (min 6 digits)\n- Entered value > 0 per line\n- Importer required\n- Size check (< 12 MB)\n- Control number cross-validation (ISA/IEA, GS/GE, ST/SE)\n\nTested: Goldmex 4-line truck shipment (MX→US via Laredo):\n  - Valid: True\n  - 26 segments, 735 bytes\n  - Control numbers match\n  - Filing decision: auto_file (98% confidence)\n  - Existing test suite: 44 passed, 0 regressions",
  "content": "X12 355 US Customs Entry Summary builder — SHIPPED.\n\nNew file: rosetta_core/x12_355.py (~370 lines)\n\nArchitecture:\n- Follows exact same pattern as x12_309.py (builder) and x12_350.py (parser)\n- Reuses x12_common.py envelope (ISA/GS/ST/SE/GE/IEA) + party segments (N1/N3/N4)\n- Takes EntrySummary7501 from declaration_engine → serializes to X12 7010 EDI\n- GS01 = \"SE\" (Entry Summary functional ID from x12_constants.py)\n\nSegments implemented (12 types):\n- BGN: Beginning segment (entry number, entry type)\n- DTM: Date references (import, entry, export dates)\n- N1/N3/N4: Importer (IM), Customs Broker (CB), Manufacturer (MF)\n- N9: Port code + transport mode, BOL reference\n- LIN: Line item (HTS code + country of origin)\n- SLN: Subline detail (entered value, duty rate, relationship)\n- QTY: Net quantity + statistical unit\n- AMT: Entered value, charges, duty, totals (T1/T2/GT)\n- TC2: CATAIR Appendix F computation codes (all 18 supported)\n- CTT: Transaction totals (line count + hash total)\n\nValidation:\n- Entry number length (11 chars)\n- Port code required\n- HTS per line (min 6 digits)\n- Entered value > 0 per line\n- Importer required\n- Size check (< 12 MB)\n- Control number cross-validation (ISA/IEA, GS/GE, ST/SE)\n\nTested: Goldmex 4-line truck shipment (MX→US via Laredo):\n  - Valid: True\n  - 26 segments, 735 bytes\n  - Control numbers match\n  - Filing decision: auto_file (98% confidence)\n  - Existing test suite: 44 passed, 0 regressions"
}