techmannih/nema34-mounted-stepper-controller

engineering/schematic-review-baseline.json

{
  "baseline_commit": "50350344ec36ee153ca9e64e8e67c66ce1141f8a",
  "baseline_non_schematic_sha256": "685a122cdec94efc90c2189722b36771b50298108816cf03cb05112313ed2025",
  "record_count": 6998,
  "algorithm": "SHA-256 with recursively sorted object keys; record order retained. Exclude schematic_* and system_block_* records, source_project_metadata filesystem cache and cli_module_to_static_asset metadata. Reuse circuitSourceHash: round derived pcb_trace.trace_length to 1e-12 mm; coordinates, widths, nets and other geometry remain exact.",
  "scope": "User-authorized DRV8262DDVR migration: actual PH/EN microstepping, MCP4822 references, R60/BZ1/U36/R66 stocked replacements, C96 bypass relocation and affected local routing. DATA-only MCU, independent brake, all four motor mounting holes and unrelated source content retained.",
  "native_verification": {
    "status": "paired-DRV8262DDVR-native-CAD-verified",
    "paired_board_sha256": "000495f20437bd5cbef3d1ed4b5b1eb64360de8e61818af3300d16093b128255",
    "byte_identical_to_baseline": false,
    "unconnected_items": 0,
    "schematic_parity_issues": 0,
    "erc_violations": 0,
    "retained_hole_clearance_errors": 8,
    "retained_cosmetic_warnings": 488,
    "fabrication_authorized": false
  },
  "previous_schematic_only_baseline": {
    "baseline_commit": "34aca1af8736b482bd8edf86ec449a56c15d50c1",
    "algorithm": "SHA-256 with recursively sorted object keys; record order retained. Exclude only schematic_* records, source_project_metadata filesystem cache and cli_module_to_static_asset metadata. Reuse circuitSourceHash: round derived pcb_trace.trace_length to 1e-12 mm; coordinates, widths, nets and other geometry remain exact.",
    "baseline_non_schematic_sha256": "8331699b9c226e8d3a384a667d0a435e7fa8a5f39855e00b99a441bf5a3ff7de",
    "record_count": 6596,
    "baseline_native_board_sha256": "0455d7ba01ada4b5635d61e988f82bd3ad80fb59acb2ac50367179bc6c4703c6",
    "scope": "Schematic organisation and documents only. All compiled source electrical records and PCB geometry must compare exactly. Native metadata may change when paired to new sheet hierarchy; copper requires a separate native geometry comparison.",
    "native_verification": {
      "paired_board_sha256": "0455d7ba01ada4b5635d61e988f82bd3ad80fb59acb2ac50367179bc6c4703c6",
      "byte_identical_to_baseline": true,
      "unconnected_items": 0,
      "schematic_parity_issues": 0,
      "erc_violations": 0,
      "retained_hole_clearance_errors": 8,
      "retained_cosmetic_warnings": 451,
      "fabrication_authorized": false
    },
    "baseline_exact_non_schematic_sha256": "6cccbc12995ec8d62a1749aab18db9dc2690576ce320acb4267c2af9fa23a056",
    "cross_platform_evidence": {
      "workflow_run_id": 41679486520,
      "artifact_id": 13252317121,
      "mac_linux_record_count": 6596,
      "only_differences": [
        {
          "field": "pcb_trace.trace_length",
          "mac": 1.3870242929152334,
          "linux": 1.3870242929152332
        },
        {
          "field": "pcb_trace.trace_length",
          "mac": 2.3614712022848914,
          "linux": 2.361471202284891
        },
        {
          "field": "pcb_trace.trace_length",
          "mac": 1.5851258021515604,
          "linux": 1.5851258021515602
        }
      ]
    }
  },
  "baseline_native_board_sha256": "000495f20437bd5cbef3d1ed4b5b1eb64360de8e61818af3300d16093b128255",
  "previous_hardware_eco_baseline": {
    "baseline_commit": "fd77f025d1031127cc8e40b0dd6028b1b08520cf",
    "baseline_non_schematic_sha256": "d91d0047ef6002b6ed8693f6ec293083de094ddb8c6dc0fe13e0a637c95aa23d",
    "baseline_native_board_sha256": "097e7d2f3bbe412744c118c06e71c14a7adf5d1f30942f13ad93497d7300a87a",
    "record_count": 6836,
    "scope": "User-authorized DATA-only MCU ECO: remove U26, isolate PD I2C/status with U39/U40, switch phase/encoder sensor power with U41, and revise C22/C23 bulk plus C18 ramp. Source topology/negative isolation tests and nine schematic style analyses pass. Native routing and fabrication qualification remain separate gates.",
    "native_verification": {
      "status": "paired-DATA-only-native-CAD-verified",
      "paired_board_sha256": "097e7d2f3bbe412744c118c06e71c14a7adf5d1f30942f13ad93497d7300a87a",
      "byte_identical_to_baseline": false,
      "unconnected_items": 0,
      "schematic_parity_issues": 0,
      "erc_violations": 0,
      "retained_hole_clearance_errors": 8,
      "retained_cosmetic_warnings": 475,
      "fabrication_authorized": false
    }
  },
  "r65_supplier_substitution": {
    "date": "2026-11-07",
    "previous_non_schematic_sha256": "02090682f6276d7ae6e902b8b0507f834aa4bfd18a4b6652c6ab91095c9c2475",
    "change": "R65 supplier_part_numbers C723637 to C328424. A record-by-record diff of the compiled circuit shows no other electrical or PCB record changed.",
    "evidence": "sourcing/r65-substitution.json"
  },
  "encoder_via_resize": {
    "date": "2026-11-07",
    "previous_non_schematic_sha256": "66b1d6daf929243feb923bc63b786a742476444e63264868433fa75b4a2a3f8c",
    "change": "User-requested board viaPadDiameter 0.6 to 0.45 and minViaPadDiameter 0.5 to 0.45. A record-by-record diff of the compiled circuit shows only pcb_board.min_via_pad_diameter, the one pcb_via outer_diameter and the inner1 pour brep_shape around that via changed, plus excluded build metadata.",
    "evidence": "engineering/motor-a2-export-bridge.json via_resizes"
  },
  "c50_crystal_side_correction": {
    "date": "2026-11-07",
    "previous_non_schematic_sha256": "d51b2c1b443ed4090a4138c8baf4a15cac31bc5c4638497a818b753824af9401",
    "change": "C50 pin 1 moved from OSC_OUT to XTAL_OUT so it loads the crystal side of R138. Native copper diff is exactly 2 modified, 2 removed and 1 added record.",
    "evidence": "engineering/motor-a2-export-bridge.json c50_correction"
  },
  "crystal_swap": {
    "date": "2026-11-07",
    "previous_non_schematic_sha256": "fd41fffe4e1dd6d633dd974252db2f3430a7b4f679b7281ef1af87e300ce5805",
    "change": "Y1 changed to ABM8-272-T3 and C49/C50 to 15 pF C1644. Nets, placement and copper are unchanged.",
    "evidence": "sourcing/crystal-substitution.json"
  }
}