# HStack

A horizontal flex row with a token-scale gap, cross-axis alignment, main-axis distribution, wrap, and scroll options.

Version: 0.2.0-preview.1 (preview)
Content digest: 70ac710f4d22dce040e7ac593379ba8aca9dcb59a0b9c0f839819cae0e2bb721
Contract kind: source-derived
Source: packages/design-system/src/components/layout/HStack/HStack.tsx

## Guidance

{
  "summary": "A horizontal flex row with a token-scale gap, cross-axis alignment, main-axis distribution, wrap, and scroll options.",
  "guidance": [
    {
      "heading": "Overview",
      "body": "Horizontal flex row with a token-scale `gap` — the default replacement for hand-rolled\n`display:flex; flex-direction:row` wrappers."
    },
    {
      "heading": "When to use",
      "body": "Reach for `HStack` when items sit side by side in a single row — an icon beside a label, a\ntitle with a trailing action, a footer's paired buttons. `align` is the cross (vertical) axis\nand `justify` the main (horizontal) axis, so `justify=\"between\"` pins the first and last child\nto the row edges.\n\n-   Stacking elements **top to bottom** instead? Use `VStack`.\n-   Laying out **equal-width tiles** that wrap into a fixed column count? Use `Grid`.\n-   Row that **overflows and should swipe**? Use `scroll` for a plain overflow strip, or `Carousel`\n    for snapping one-per-view paging."
    }
  ],
  "usage": [],
  "examples": [],
  "source": "packages/design-system/src/components/layout/HStack/HStack.mdx",
  "status": "local-preview",
  "note": "Guidance is read from local documentation, originally imported from the frozen source. Platform assertions in guidance are not parity verification."
}

## Contract and public API

```json
{
  "props": [
    {
      "name": "gap",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "StackGap",
      "required": false,
      "description": "Space between children, in `--cds-space-*` steps.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 34
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "align",
      "type": "StackAlign | undefined",
      "declared_type": "StackAlign",
      "required": false,
      "description": "Cross-axis alignment (`align-items`).",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 36
      },
      "values": [
        "baseline",
        "center",
        "end",
        "start",
        "stretch"
      ],
      "values_complete": true
    },
    {
      "name": "justify",
      "type": "StackJustify | undefined",
      "declared_type": "StackJustify",
      "required": false,
      "description": "Main-axis distribution (`justify-content`).",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 38
      },
      "values": [
        "around",
        "between",
        "center",
        "end",
        "evenly",
        "start"
      ],
      "values_complete": true
    },
    {
      "name": "wrap",
      "type": "boolean | undefined",
      "declared_type": "boolean",
      "required": false,
      "description": "Reflow children onto new lines on overflow, where `scroll` keeps them on one line.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 40
      },
      "values": [
        false,
        true
      ],
      "values_complete": true
    },
    {
      "name": "scroll",
      "type": "boolean | undefined",
      "declared_type": "boolean",
      "required": false,
      "description": "Turn the stack into a swipeable overflow strip on the main axis (HStack\nscrolls horizontally, VStack vertically) and hide the scrollbar. For\ncarousels, set `scroll-snap-align` on the children.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 46
      },
      "values": [
        false,
        true
      ],
      "values_complete": true
    },
    {
      "name": "as",
      "type": "React.ElementType<any, keyof React.JSX.IntrinsicElements> | undefined",
      "declared_type": "React.ElementType",
      "required": false,
      "description": "Rendered element. Defaults to `div`.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 48
      }
    },
    {
      "name": "className",
      "type": "string | undefined",
      "declared_type": "string",
      "required": false,
      "description": "",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 49
      }
    },
    {
      "name": "style",
      "type": "React.CSSProperties | undefined",
      "declared_type": "React.CSSProperties",
      "required": false,
      "description": "",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 50
      }
    },
    {
      "name": "children",
      "type": "React.ReactNode",
      "declared_type": "React.ReactNode",
      "required": false,
      "description": "",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 51
      }
    },
    {
      "name": "testId",
      "type": "string | undefined",
      "declared_type": "string",
      "required": false,
      "description": "Optional test selector, placed on the `as` element.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 53
      }
    },
    {
      "name": "id",
      "type": "string | undefined",
      "declared_type": "string",
      "required": false,
      "description": "DOM id for aria relationships such as `aria-describedby`.",
      "source": {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 55
      }
    },
    {
      "name": "padding",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Padding on all four sides.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 10
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingX",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Horizontal padding (left + right). Overrides `padding` on the X axis.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 12
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingY",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Vertical padding (top + bottom). Overrides `padding` on the Y axis.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 14
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingTop",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Top padding. Overrides `paddingY` and `padding`.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 16
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingRight",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Right padding. Overrides `paddingX` and `padding`.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 18
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingBottom",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Bottom padding. Overrides `paddingY` and `padding`.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 20
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    },
    {
      "name": "paddingLeft",
      "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
      "declared_type": "CdsSpace",
      "required": false,
      "description": "Left padding. Overrides `paddingX` and `padding`.",
      "source": {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 22
      },
      "values": [
        0,
        12,
        120,
        16,
        20,
        24,
        240,
        32,
        4,
        40,
        48,
        56,
        64,
        72,
        8,
        80,
        96
      ],
      "values_complete": true
    }
  ],
  "prop_shapes": {},
  "api": {
    "method": "typescript-type-checker",
    "typescript_version": "5.9.3",
    "public_export": "HStack",
    "public_path": "HStack",
    "import_path": "@cloakedinc/design-system",
    "root_kind": "component",
    "entrypoints": [
      {
        "name": "HStack",
        "signature": 1,
        "visibility": "public",
        "source": {
          "path": "packages/design-system/src/components/layout/HStack/HStack.tsx",
          "line": 14
        },
        "props_type": "StackOwnProps",
        "props": [
          {
            "name": "gap",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "StackGap",
            "required": false,
            "description": "Space between children, in `--cds-space-*` steps.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 34
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "align",
            "type": "StackAlign | undefined",
            "declared_type": "StackAlign",
            "required": false,
            "description": "Cross-axis alignment (`align-items`).",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 36
            },
            "values": [
              "baseline",
              "center",
              "end",
              "start",
              "stretch"
            ],
            "values_complete": true
          },
          {
            "name": "justify",
            "type": "StackJustify | undefined",
            "declared_type": "StackJustify",
            "required": false,
            "description": "Main-axis distribution (`justify-content`).",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 38
            },
            "values": [
              "around",
              "between",
              "center",
              "end",
              "evenly",
              "start"
            ],
            "values_complete": true
          },
          {
            "name": "wrap",
            "type": "boolean | undefined",
            "declared_type": "boolean",
            "required": false,
            "description": "Reflow children onto new lines on overflow, where `scroll` keeps them on one line.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 40
            },
            "values": [
              false,
              true
            ],
            "values_complete": true
          },
          {
            "name": "scroll",
            "type": "boolean | undefined",
            "declared_type": "boolean",
            "required": false,
            "description": "Turn the stack into a swipeable overflow strip on the main axis (HStack\nscrolls horizontally, VStack vertically) and hide the scrollbar. For\ncarousels, set `scroll-snap-align` on the children.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 46
            },
            "values": [
              false,
              true
            ],
            "values_complete": true
          },
          {
            "name": "as",
            "type": "React.ElementType<any, keyof React.JSX.IntrinsicElements> | undefined",
            "declared_type": "React.ElementType",
            "required": false,
            "description": "Rendered element. Defaults to `div`.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 48
            }
          },
          {
            "name": "className",
            "type": "string | undefined",
            "declared_type": "string",
            "required": false,
            "description": "",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 49
            }
          },
          {
            "name": "style",
            "type": "React.CSSProperties | undefined",
            "declared_type": "React.CSSProperties",
            "required": false,
            "description": "",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 50
            }
          },
          {
            "name": "children",
            "type": "React.ReactNode",
            "declared_type": "React.ReactNode",
            "required": false,
            "description": "",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 51
            }
          },
          {
            "name": "testId",
            "type": "string | undefined",
            "declared_type": "string",
            "required": false,
            "description": "Optional test selector, placed on the `as` element.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 53
            }
          },
          {
            "name": "id",
            "type": "string | undefined",
            "declared_type": "string",
            "required": false,
            "description": "DOM id for aria relationships such as `aria-describedby`.",
            "source": {
              "path": "packages/design-system/src/components/layout/Stack.tsx",
              "line": 55
            }
          },
          {
            "name": "padding",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Padding on all four sides.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 10
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingX",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Horizontal padding (left + right). Overrides `padding` on the X axis.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 12
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingY",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Vertical padding (top + bottom). Overrides `padding` on the Y axis.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 14
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingTop",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Top padding. Overrides `paddingY` and `padding`.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 16
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingRight",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Right padding. Overrides `paddingX` and `padding`.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 18
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingBottom",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Bottom padding. Overrides `paddingY` and `padding`.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 20
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          },
          {
            "name": "paddingLeft",
            "type": "0 | 4 | 8 | 12 | 16 | 20 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 | 96 | 120 | 240 | undefined",
            "declared_type": "CdsSpace",
            "required": false,
            "description": "Left padding. Overrides `paddingX` and `padding`.",
            "source": {
              "path": "packages/design-system/src/components/layout/resolvePadding.ts",
              "line": 22
            },
            "values": [
              0,
              12,
              120,
              16,
              20,
              24,
              240,
              32,
              4,
              40,
              48,
              56,
              64,
              72,
              8,
              80,
              96
            ],
            "values_complete": true
          }
        ],
        "branches": [],
        "constraints": [],
        "extraction_status": "extracted"
      }
    ],
    "type_sources": [
      {
        "path": "packages/design-system/src/components/layout/HStack/HStack.tsx",
        "line": 8,
        "name": "HStackProps",
        "code": "export type HStackProps = StackOwnProps;"
      },
      {
        "path": "packages/design-system/src/components/layout/resolvePadding.ts",
        "line": 8,
        "name": "PaddingProps",
        "code": "export interface PaddingProps {\n    /** Padding on all four sides. */\n    padding?: CdsSpace;\n    /** Horizontal padding (left + right). Overrides `padding` on the X axis. */\n    paddingX?: CdsSpace;\n    /** Vertical padding (top + bottom). Overrides `padding` on the Y axis. */\n    paddingY?: CdsSpace;\n    /** Top padding. Overrides `paddingY` and `padding`. */\n    paddingTop?: CdsSpace;\n    /** Right padding. Overrides `paddingX` and `padding`. */\n    paddingRight?: CdsSpace;\n    /** Bottom padding. Overrides `paddingY` and `padding`. */\n    paddingBottom?: CdsSpace;\n    /** Left padding. Overrides `paddingX` and `padding`. */\n    paddingLeft?: CdsSpace;\n}"
      },
      {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 8,
        "name": "StackGap",
        "code": "export type StackGap = CdsSpace;"
      },
      {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 9,
        "name": "StackAlign",
        "code": "export type StackAlign = 'start' | 'center' | 'end' | 'stretch' | 'baseline';"
      },
      {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 10,
        "name": "StackJustify",
        "code": "export type StackJustify = 'start' | 'center' | 'end' | 'between' | 'around' | 'evenly';"
      },
      {
        "path": "packages/design-system/src/components/layout/Stack.tsx",
        "line": 32,
        "name": "StackOwnProps",
        "code": "export interface StackOwnProps extends PaddingProps {\n    /** Space between children, in `--cds-space-*` steps. */\n    gap?: StackGap;\n    /** Cross-axis alignment (`align-items`). */\n    align?: StackAlign;\n    /** Main-axis distribution (`justify-content`). */\n    justify?: StackJustify;\n    /** Reflow children onto new lines on overflow, where `scroll` keeps them on one line. */\n    wrap?: boolean;\n    /**\n     * Turn the stack into a swipeable overflow strip on the main axis (HStack\n     * scrolls horizontally, VStack vertically) and hide the scrollbar. For\n     * carousels, set `scroll-snap-align` on the children.\n     */\n    scroll?: boolean;\n    /** Rendered element. Defaults to `div`. */\n    as?: React.ElementType;\n    className?: string;\n    style?: React.CSSProperties;\n    children?: React.ReactNode;\n    /** Optional test selector, placed on the `as` element. */\n    testId?: string;\n    /** DOM id for aria relationships such as `aria-describedby`. */\n    id?: string;\n}"
      },
      {
        "path": "packages/design-system/src/tokens/CdsSpace.ts",
        "line": 8,
        "name": "PUI_SPACES",
        "code": "PUI_SPACES = [0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 56, 64, 72, 80, 96, 120, 240] as const"
      },
      {
        "path": "packages/design-system/src/tokens/CdsSpace.ts",
        "line": 13,
        "name": "CdsSpace",
        "code": "export type CdsSpace = (typeof PUI_SPACES)[number];"
      }
    ],
    "defaults_policy": "Only explicit destructured parameter initializers are extracted. Other runtime defaults remain in implementation source."
  },
  "spec": {
    "$schema": "../../../specs/component-spec.schema.json",
    "identity": {
      "name": "HStack",
      "status": "preview",
      "version": "1.0.0",
      "summary": "A horizontal flex row with a token-scale gap, cross-axis alignment, main-axis distribution, wrap, and scroll options."
    },
    "parts": [
      {
        "id": "root",
        "label": "Root",
        "description": "Flex row container. Structural: it lays out children and paints no surface of its own.",
        "required": true
      }
    ],
    "allowedDesignChoices": {
      "variants": {
        "row": {
          "label": "Row",
          "description": "The single horizontal flex layout."
        }
      },
      "sizes": {},
      "alignments": {
        "start": {
          "label": "Start"
        },
        "center": {
          "label": "Center"
        },
        "end": {
          "label": "End"
        },
        "stretch": {
          "label": "Stretch"
        },
        "baseline": {
          "label": "Baseline"
        }
      },
      "justifications": {
        "start": {
          "label": "Start"
        },
        "center": {
          "label": "Center"
        },
        "end": {
          "label": "End"
        },
        "between": {
          "label": "Between"
        },
        "around": {
          "label": "Around"
        },
        "evenly": {
          "label": "Evenly"
        }
      }
    },
    "variants": [
      {
        "id": "row",
        "label": "Row",
        "description": "Horizontal flex container.",
        "platforms": [
          "ios",
          "android",
          "web"
        ]
      }
    ],
    "sizes": [],
    "measurements": [
      {
        "id": "stack-gap",
        "label": "Row gap",
        "kind": "example-only",
        "token": "--cds-space-12",
        "value": 12,
        "unit": "px",
        "appliesTo": [
          "root"
        ],
        "notes": "Representative value: gap is author-configurable and accepts any step on the spacing scale. 12 is the value rendered and verified by the Playground story."
      }
    ],
    "layout": {
      "alignment": "align sets the cross (vertical) axis; justify sets the main (horizontal) axis.",
      "flow": "Children flow left to right and may wrap or scroll on overflow.",
      "notes": [
        "Use VStack for a column, Grid for equal-width tiles, and scroll or Carousel for a swipe strip."
      ]
    },
    "typographyAndColor": {
      "typography": [
        {
          "label": "Inherited",
          "description": "HStack sets no type; children own their text. Ramp noted for parity.",
          "token": "--cds-type-body-size"
        }
      ],
      "colors": [
        {
          "label": "Transparent",
          "description": "HStack paints no background; the surface behind shows through.",
          "token": "--cds-bg-page"
        }
      ]
    },
    "states": [
      {
        "id": "default",
        "label": "Default",
        "description": "Static row that flexes to its children."
      },
      {
        "id": "wrap",
        "label": "Wrapped",
        "description": "Children wrap onto additional rows on overflow."
      },
      {
        "id": "scroll",
        "label": "Scroll",
        "description": "The row becomes a horizontal overflow strip with a hidden scrollbar."
      }
    ],
    "behavior": [
      {
        "label": "Token gap",
        "description": "gap uses the spacing scale; avoid hand-rolled flex wrappers."
      },
      {
        "label": "Padding",
        "description": "Padding props map to the spacing scale per edge."
      }
    ],
    "accessibility": [
      {
        "label": "Presentational",
        "description": "HStack is a layout container and adds no roles; order follows DOM order."
      },
      {
        "label": "Focus order",
        "description": "Reordering visually via justify does not change tab order."
      }
    ],
    "contentAdaptation": [
      {
        "label": "Wrap vs scroll",
        "description": "Choose wrap to reflow onto new rows or scroll to keep a single overflow strip."
      },
      {
        "label": "Distribution",
        "description": "between, around, and evenly need free space to distribute children."
      }
    ],
    "motionHaptics": {
      "motion": [
        {
          "label": "None",
          "description": "HStack does not animate layout changes on its own."
        }
      ],
      "haptics": [
        {
          "label": "None",
          "description": "A layout container requests no haptics."
        }
      ]
    },
    "platformDifferences": []
  },
  "platforms": {
    "implemented": [
      "web"
    ],
    "native": "Imported design guidance only; no native implementation or parity verification in this preview.",
    "react": {
      "implementation": "local",
      "status": "preview",
      "parity": "web-reference"
    },
    "vue": {
      "implementation": "absent",
      "parity": "not-verified",
      "status": "reference-only"
    },
    "swift": {
      "implementation": "absent",
      "parity": "not-verified",
      "status": "reference-only"
    },
    "kotlin": {
      "implementation": "absent",
      "parity": "not-verified",
      "status": "reference-only"
    }
  },
  "tokens": [
    {
      "name": "--cds-space-12",
      "light": "12px",
      "dark": "12px"
    },
    {
      "name": "--cds-type-body-size",
      "light": "1rem",
      "dark": "1rem"
    },
    {
      "name": "--cds-bg-page",
      "light": "#f3f1ed",
      "dark": "#141410"
    }
  ],
  "review": {
    "local_status": "not-reviewed",
    "source_approval": null,
    "imported_spec_status": "approved",
    "spec_origin": "imported-adapted",
    "local_spec_source_status": "approved",
    "imported_source_revision": "f96f416e1c3bfbfaffcd155a88b87b18b8bb25f1",
    "note": "Inherited specification status is provenance, not approval of the current local implementation or extracted contract."
  },
  "missing_facts": [
    {
      "code": "human-review-pending",
      "detail": "This local preview has no recorded human design or engineering sign-off."
    },
    {
      "code": "platform-parity-unverified",
      "detail": "Vue, Swift and Kotlin implementations are absent from this package; platform parity has not been verified."
    },
    {
      "code": "figma-mapping-unverified",
      "detail": "No current component-level Figma node and immutable revision have been verified for this contract."
    }
  ]
}
```

## Visual states

- [Playground](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--playground&viewMode=story) | export: Playground | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

- [Space Between](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--space-between&viewMode=story) | export: SpaceBetween | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

- [Align Matrix](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--align-matrix&viewMode=story) | export: AlignMatrix | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

- [Justify Matrix](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--justify-matrix&viewMode=story) | export: JustifyMatrix | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

- [Wrapped](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--wrapped&viewMode=story) | export: Wrapped | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

- [Scroll Strip](/storybook/iframe.html?id=cloaked-design-system-layout-hstack--scroll-strip&viewMode=story) | export: ScrollStrip | source: packages/design-system/src/components/layout/HStack/HStack.stories.tsx

Preview pending human sign-off. Source-derived APIs and successful checks do not certify accessibility, native parity or approval.