(keyword value)
(keyword (nested value))
(keyword
  (child1 value)
  (child2 value)
)

(kicad_sch
  (version 20231120)
  (generator "eeschema")
  (generator_version "8.0")
  (uuid "project-uuid")
  (paper "A4")
  
  ; Title block
  (title_block
    (title "Project Title")
    (date "2024-01-01")
    (rev "1.0")
    (company "Company Name")
  )
  
  ; Library symbols (embedded copies)
  (lib_symbols
    (symbol "Device:R" ...)
  )
  
  ; Placed symbols (component instances)
  (symbol ...)
  (symbol ...)
  
  ; Wires and connections
  (wire ...)
  (bus ...)
  (junction ...)
  
  ; Labels and nets
  (label ...)
  (global_label ...)
  (hierarchical_label ...)
  
  ; Hierarchical sheets
  (sheet ...)
  
  ; Text and graphics
  (text ...)
  (polyline ...)
  (rectangle ...)
)

(symbol
  (lib_id "Device:R")
  (at 100 50 0)              ; x, y, rotation (0, 90, 180, 270)
  (unit 1)                   ; Multi-unit symbols
  (exclude_from_sim no)
  (in_bom yes)
  (on_board yes)
  (dnp no)                   ; Do Not Populate
  (uuid "symbol-uuid")
  (property "Reference" "R1"
    (at 100 45 0)
    (effects (font (size 1.27 1.27)))
  )
  (property "Value" "10k"
    (at 100 55 0)
    (effects (font (size 1.27 1.27)))
  )
  (property "Footprint" "Resistor_SMD:R_0402_1005Metric"
    (at 100 50 0)
    (effects (font (size 1.27 1.27)) hide)
  )
  (property "LCSC" "C25744"
    (at 100 50 0)
    (effects (font (size 1.27 1.27)) hide)
  )
  (pin "1" (uuid "pin1-uuid"))
  (pin "2" (uuid "pin2-uuid"))
  (instances
    (project "project_name"
      (path "/root-uuid" (reference "R1") (unit 1))
    )
  )
)

(wire
  (pts
    (xy 100 50)
    (xy 120 50)
  )
  (stroke (width 0) (type default))
  (uuid "wire-uuid")
)

(label "VCC"
  (at 100 50 0)
  (effects (font (size 1.27 1.27)))
  (uuid "label-uuid")
)

(global_label "USB_D+"
  (shape input)              ; input, output, bidirectional, tri_state, passive
  (at 150 60 0)
  (effects (font (size 1.27 1.27)))
  (uuid "global-uuid")
  (property "Intersheetrefs" "${INTERSHEET_REFS}"
    (at 150 60 0)
    (effects (font (size 1.27 1.27)) hide)
  )
)

(symbol
  (lib_id "power:GND")
  (at 100 80 0)
  (unit 1)
  (exclude_from_sim yes)
  (in_bom no)
  (on_board yes)
  (uuid "power-uuid")
  (property "Reference" "#PWR01" ...)
  (property "Value" "GND" ...)
  (pin "1" (uuid "..."))
)

(sheet
  (at 50 50)
  (size 30 20)
  (fields_autoplaced yes)
  (stroke (width 0.1524) (type solid))
  (fill (color 255 255 255 0))
  (uuid "sheet-uuid")
  (property "Sheetname" "Power Supply"
    (at 50 49 0)
    (effects (font (size 1.27 1.27)))
  )
  (property "Sheetfile" "power_supply.kicad_sch"
    (at 50 72 0)
    (effects (font (size 1.27 1.27)) hide)
  )
  (pin "VIN" input
    (at 50 55 180)
    (effects (font (size 1.27 1.27)))
    (uuid "sheet-pin-uuid")
  )
)

(kicad_pcb
  (version 20231014)
  (generator "pcbnew")
  (generator_version "8.0")
  (general
    (thickness 1.6)
    (legacy_teardrops no)
  )
  
  ; Page settings
  (paper "A4")
  (title_block ...)
  
  ; Layer definitions
  (layers
    (0 "F.Cu" signal)
    (31 "B.Cu" signal)
    (32 "B.Adhes" user "B.Adhesive")
    (33 "F.Adhes" user "F.Adhesive")
    (34 "B.Paste" user)
    (35 "F.Paste" user)
    (36 "B.SilkS" user "B.Silkscreen")
    (37 "F.SilkS" user "F.Silkscreen")
    (38 "B.Mask" user)
    (39 "F.Mask" user)
    (40 "Dwgs.User" user "User.Drawings")
    (41 "Cmts.User" user "User.Comments")
    (42 "Eco1.User" user "User.Eco1")
    (43 "Eco2.User" user "User.Eco2")
    (44 "Edge.Cuts" user)
    (45 "Margin" user)
    (46 "B.CrtYd" user "B.Courtyard")
    (47 "F.CrtYd" user "F.Courtyard")
    (48 "B.Fab" user)
    (49 "F.Fab" user)
  )
  
  ; Design rules setup
  (setup ...)
  
  ; Net definitions
  (net 0 "")
  (net 1 "GND")
  (net 2 "VCC")
  
  ; Footprints (component instances)
  (footprint ...)
  
  ; Traces
  (segment ...)
  
  ; Vias
  (via ...)
  
  ; Zones (copper pours)
  (zone ...)
  
  ; Graphics
  (gr_line ...)
  (gr_rect ...)
  (gr_circle ...)
  (gr_text ...)
)

(footprint "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm"
  (layer "F.Cu")
  (uuid "footprint-uuid")
  (at 100 50 0)              ; x, y, rotation
  (descr "SOIC-8 package")
  (property "Reference" "U1"
    (at 0 -3.5 0)
    (layer "F.SilkS")
    (uuid "ref-uuid")
    (effects (font (size 1 1) (thickness 0.15)))
  )
  (property "Value" "ESP32-S3"
    (at 0 3.5 0)
    (layer "F.Fab")
    (uuid "val-uuid")
    (effects (font (size 1 1) (thickness 0.15)))
  )
  (property "Footprint" "Package_SO:SOIC-8..."
    (at 0 0 0)
    (layer "F.Fab")
    (hide yes)
    (uuid "fp-uuid")
  )
  
  ; Pads
  (pad "1" smd rect
    (at -1.905 -2.475)
    (size 0.6 1.5)
    (layers "F.Cu" "F.Paste" "F.Mask")
    (net 1 "GND")
    (uuid "pad-uuid")
  )
  (pad "2" thru_hole circle
    (at 0 0)
    (size 1.7 1.7)
    (drill 1.0)
    (layers "*.Cu" "*.Mask")
    (net 2 "VCC")
    (uuid "pad-uuid")
  )
  
  ; Silkscreen graphics
  (fp_line
    (start -2.5 -2.5)
    (end 2.5 -2.5)
    (stroke (width 0.12) (type solid))
    (layer "F.SilkS")
    (uuid "line-uuid")
  )
)

(segment
  (start 100 50)
  (end 120 50)
  (width 0.25)
  (layer "F.Cu")
  (net 1)
  (uuid "segment-uuid")
)

(arc
  (start 100 50)
  (mid 105 45)
  (end 110 50)
  (width 0.25)
  (layer "F.Cu")
  (net 1)
  (uuid "arc-uuid")
)

(via
  (at 110 60)
  (size 0.8)
  (drill 0.4)
  (layers "F.Cu" "B.Cu")
  (net 1)
  (uuid "via-uuid")
)

(zone
  (net 1)
  (net_name "GND")
  (layer "F.Cu")
  (uuid "zone-uuid")
  (hatch edge 0.5)
  (connect_pads
    (clearance 0.25)
  )
  (min_thickness 0.25)
  (filled_areas_thickness no)
  (fill yes
    (thermal_gap 0.5)
    (thermal_bridge_width 0.5)
  )
  (polygon
    (pts
      (xy 0 0)
      (xy 100 0)
      (xy 100 100)
      (xy 0 100)
    )
  )
  (filled_polygon
    (layer "F.Cu")
    (pts ...)
  )
)

(gr_rect
  (start 0 0)
  (end 100 100)
  (stroke (width 0.1) (type default))
  (fill none)
  (layer "Edge.Cuts")
  (uuid "outline-uuid")
)

undefined

undefined