diff --git a/docs/api-migrations.md b/docs/api-migrations.md
index de90318c..f90d674e 100644
--- a/docs/api-migrations.md
+++ b/docs/api-migrations.md
@@ -1,5 +1,33 @@
 # LUI API migration guide
 
+## Unreleased: independent flex shrink on Web and MyGo
+
+`row`, `column` and `box` accept `?shrink:float`. The typed `ShrinkValue`
+property uses wire name `shrink` and accepts only finite, nonnegative floats.
+Only these three standard kinds admit it. Web maps it to CSS `flex-shrink`;
+MyGo uses the existing `Element.Shrink` without an SDK or dependency update.
+Generic, SwiftUI and Kotlin profiles reject explicit shrink values; Apple and
+Android also reject direct standard wire patches rather than ignoring them.
+Extensions/raw markup do not gain a shrink property or escape hatch.
+
+Omitting or removing shrink preserves/restores the existing default factor 1.
+Setting or removing it does not change `grow` or flex basis. Existing callers
+need no changes. New callers must use a host supporting this property and a
+LUI version that knows the new wire name; older hosts reject that opt-in.
+
+For a bounded, clipped single-line strip, opt in on each direct pill container:
+
+```ocaml
+row ~flex_wrap:`nowrap
+  [row ~shrink:0. [text ~value:"First" []];
+   row ~shrink:0. [text ~value:"Second" []]]
+```
+
+Use the existing typed overflow property on the strip for clipping. Shrink on
+the strip itself does not disable shrinking its children. Remove unnecessary
+child `grow` props to keep intrinsic sizing; do not substitute `grow:0` for
+`shrink:0`, because MyGo's `Grow` also changes an auto basis to zero percent.
+
 ## Unreleased: opt-in container focus-within observation (Web and MyGo)
 
 `row`, `column` and `box` accept `?on_focus_within:(bool -> unit)` on
diff --git a/platform/android/lui/src/main/kotlin/dev/lui/LuiKindRules.kt b/platform/android/lui/src/main/kotlin/dev/lui/LuiKindRules.kt
index 423a6963..1696bb21 100644
--- a/platform/android/lui/src/main/kotlin/dev/lui/LuiKindRules.kt
+++ b/platform/android/lui/src/main/kotlin/dev/lui/LuiKindRules.kt
@@ -316,6 +316,7 @@ internal object LuiKindRules {
      * op is admissible for the node's kind. */
     fun supports(kind: LuiNodeKind, property: String, value: LuiWireValue): Boolean {
         if (property == "focus-within-enabled") return false
+        if (property == "shrink") return false
         when (property) {
             "virtual-total-count", "virtual-generation", "virtual-indices", "virtual-scroll-index" ->
                 return kind == LuiNodeKind.virtualList && schemaValueSupported(property, value)
diff --git a/platform/android/lui/src/main/kotlin/dev/lui/LuiWireSchema.kt b/platform/android/lui/src/main/kotlin/dev/lui/LuiWireSchema.kt
index 90b0fcee..6ca98893 100644
--- a/platform/android/lui/src/main/kotlin/dev/lui/LuiWireSchema.kt
+++ b/platform/android/lui/src/main/kotlin/dev/lui/LuiWireSchema.kt
@@ -296,6 +296,7 @@ enum class LuiProperty(val wireName: String) {
     indeterminate("indeterminate"),
     toggleDetailEnabled("toggle-detail-enabled"),
     focusWithinEnabled("focus-within-enabled"),
+    shrink("shrink"),
     ;
 
     companion object {
@@ -338,13 +339,13 @@ object LuiSchemaMatrix {
         LuiNodeKind.checkbox to setOf(LuiProperty.gap, LuiProperty.labelOpacity, LuiProperty.indicatorBorderColor, LuiProperty.checkedIndicatorBorderColor),
         LuiNodeKind.radio to setOf(LuiProperty.gap, LuiProperty.labelOpacity),
         LuiNodeKind.grid to setOf(LuiProperty.main, LuiProperty.cross),
-        LuiNodeKind.row to setOf(LuiProperty.orientation, LuiProperty.focusWithinEnabled),
-        LuiNodeKind.column to setOf(LuiProperty.focusWithinEnabled),
+        LuiNodeKind.row to setOf(LuiProperty.orientation, LuiProperty.focusWithinEnabled, LuiProperty.shrink),
+        LuiNodeKind.column to setOf(LuiProperty.focusWithinEnabled, LuiProperty.shrink),
         LuiNodeKind.listItem to setOf(LuiProperty.display),
         LuiNodeKind.dialog to setOf(LuiProperty.description, LuiProperty.background, LuiProperty.foreground, LuiProperty.borderColor, LuiProperty.borderWidth, LuiProperty.cornerRadius, LuiProperty.gap, LuiProperty.transition),
         LuiNodeKind.drawer to setOf(LuiProperty.transition),
         LuiNodeKind.sheet to setOf(LuiProperty.transition),
-        LuiNodeKind.box to setOf(LuiProperty.inert, LuiProperty.focusWithinEnabled),
+        LuiNodeKind.box to setOf(LuiProperty.inert, LuiProperty.focusWithinEnabled, LuiProperty.shrink),
         LuiNodeKind.popover to setOf(LuiProperty.collisionPadding),
         LuiNodeKind.dropdownMenu to setOf(LuiProperty.collisionPadding),
         LuiNodeKind.tooltip to setOf(LuiProperty.collisionPadding),
diff --git a/platform/apple/Sources/LUIAppleBackend/LUIWireProtocol.swift b/platform/apple/Sources/LUIAppleBackend/LUIWireProtocol.swift
index a28fa469..50041da5 100644
--- a/platform/apple/Sources/LUIAppleBackend/LUIWireProtocol.swift
+++ b/platform/apple/Sources/LUIAppleBackend/LUIWireProtocol.swift
@@ -300,6 +300,8 @@ enum LUIWireValue: Decodable, Equatable {
         case .grow:
             guard let value = doubleValue else { return false }
             return value.isFinite && value >= 0
+        case .shrink:
+            return false
         case .edge:
             guard let value = stringValue else { return false }
             return Self.edges.contains(value)
@@ -1089,6 +1091,7 @@ struct LUIRetainedTree {
 
     private static func supports(_ property: LUIProperty, on kind: LUINodeKind) -> Bool {
         if property == .focusWithinEnabled { return false }
+        if property == .shrink { return false }
         switch property {
         case .virtualTotalCount, .virtualGeneration, .virtualIndices, .virtualScrollIndex:
             return kind == .virtualList
@@ -1124,6 +1127,7 @@ struct LUIRetainedTree {
                 kind == .popover || kind == .link ||
                 isHorizontalGroup(kind)
         case .grow: kind != .avatar && kind != .tooltip && !isModalSurface(kind)
+        case .shrink: false
         case .columns: kind == .grid
         case .gridColumnSpan:
             kind != .root && kind != .dialog && kind != .drawer && kind != .sheet
diff --git a/platform/apple/Sources/LUIAppleBackend/LUIWireSchema.swift b/platform/apple/Sources/LUIAppleBackend/LUIWireSchema.swift
index be5da83d..589b3446 100644
--- a/platform/apple/Sources/LUIAppleBackend/LUIWireSchema.swift
+++ b/platform/apple/Sources/LUIAppleBackend/LUIWireSchema.swift
@@ -289,6 +289,7 @@ enum LUIProperty: String, Decodable, Hashable {
     case indeterminate = "indeterminate"
     case toggleDetailEnabled = "toggle-detail-enabled"
     case focusWithinEnabled = "focus-within-enabled"
+    case shrink = "shrink"
 }
 
 enum LUISchemaMatrix {
@@ -318,13 +319,13 @@ enum LUISchemaMatrix {
         .checkbox: [.gap, .labelOpacity, .indicatorBorderColor, .checkedIndicatorBorderColor],
         .radio: [.gap, .labelOpacity],
         .grid: [.main, .cross],
-        .row: [.orientation, .focusWithinEnabled],
-        .column: [.focusWithinEnabled],
+        .row: [.orientation, .focusWithinEnabled, .shrink],
+        .column: [.focusWithinEnabled, .shrink],
         .listItem: [.display],
         .dialog: [.description, .background, .foreground, .borderColor, .borderWidth, .cornerRadius, .gap, .transition],
         .drawer: [.transition],
         .sheet: [.transition],
-        .box: [.inert, .focusWithinEnabled],
+        .box: [.inert, .focusWithinEnabled, .shrink],
         .popover: [.collisionPadding],
         .dropdownMenu: [.collisionPadding],
         .tooltip: [.collisionPadding],
diff --git a/platform/mygo/SUPPORT.md b/platform/mygo/SUPPORT.md
index f6847482..4b601095 100644
--- a/platform/mygo/SUPPORT.md
+++ b/platform/mygo/SUPPORT.md
@@ -21,8 +21,8 @@ Contract counts and hashes come from the canonical OCaml export in [the manifest
 | Kind | Built-in route | Properties | Allowed child kinds | Events | Behavior evidence |
 | --- | --- | --- | --- | --- | --- |
 | `root` | render.go; theme.go | 3 | 86 | 0 | [TestRenderAndEvents](backend_test.go), [TestThemeScopeAndMode](extensions_test.go) |
-| `row` | render.go; style.go | 96 | 81 | 12 | [TestLayoutGeometry](extensions_test.go), [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go) |
-| `column` | render.go; style.go | 93 | 81 | 9 | [TestLayoutGeometry](extensions_test.go), [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go) |
+| `row` | render.go; style.go | 97 | 81 | 12 | [TestLayoutGeometry](extensions_test.go), [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go) |
+| `column` | render.go; style.go | 94 | 81 | 9 | [TestLayoutGeometry](extensions_test.go), [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go) |
 | `grid` | render.go; style.go | 82 | 81 | 3 | [TestLayoutGeometry](extensions_test.go), [TestLayoutGridSpansAndPropertyRemovalChangeGeometry](layout_test.go) |
 | `stack` | layout.go; style.go | 79 | 81 | 3 | [TestLayoutStackUsesLargestIntrinsicChildAndRetainsOrder](layout_test.go), [TestLayoutStyleZOrderChangesPaintAndPressWithoutChangingLayout](style_test.go) |
 | `edge-inset` | layout.go; style.go | 81 | 81 | 3 | [TestLayoutEdgeInsetIncludesEveryPinnedChildAndVisibility](layout_test.go), [TestLayoutEdgeInsetSurfaceBelongsOnlyToPinnedRegion](layout_test.go) |
@@ -32,7 +32,7 @@ Contract counts and hashes come from the canonical OCaml export in [the manifest
 | `card` | render.go; style.go | 89 | 81 | 3 | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go), [TestLayoutStyleShadowOpacityStatesAndRemoval](style_test.go) |
 | `alert` | render.go; style.go | 83 | 81 | 3 | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go), [TestLayoutStyleShadowOpacityStatesAndRemoval](style_test.go) |
 | `bubble` | render.go; style.go | 84 | 81 | 3 | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go), [TestLayoutStyleShadowOpacityStatesAndRemoval](style_test.go) |
-| `box` | render.go; style.go | 95 | 81 | 12 | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go), [TestLayoutStyleShadowOpacityStatesAndRemoval](style_test.go) |
+| `box` | render.go; style.go | 96 | 81 | 12 | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go), [TestLayoutStyleShadowOpacityStatesAndRemoval](style_test.go) |
 | `text` | render.go; style.go | 86 | 86 | 9 | [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go), [TestLayoutSharedTextWrappingAndRemoval](layout_test.go), [TestLayoutStyleLogicalAndUnitlessLineHeightAndDecoration](style_test.go) |
 | `heading` | render.go; style.go | 85 | 81 | 3 | [TestLayoutStyleAccessibleHeadingAndNavigationSemantics](style_test.go) |
 | `paragraph` | render.go; style.go | 85 | 81 | 3 | [TestLayoutSharedTypographyAndSpacingRestoreInheritedValues](layout_test.go), [TestLayoutSharedTextWrappingAndRemoval](layout_test.go), [TestLayoutStyleLogicalAndUnitlessLineHeightAndDecoration](style_test.go) |
@@ -309,6 +309,7 @@ Contract counts and hashes come from the canonical OCaml export in [the manifest
 | `pointer-capture` | events.go | — | [TestEventsCapturedPointerCancel](events_test.go) |
 | `indeterminate` | controls.go | — | [TestControlsCheckboxMixedDetail](controls_test.go) |
 | `toggle-detail-enabled` | controls.go; events.go | — | [TestControlsCheckboxMixedDetail](controls_test.go) |
+| `shrink` | style.go; MyGo Element.Shrink | — | [TestLayoutStyleViewportFractionsAndContainerFrameRemoval](style_test.go) |
 
 ## Event bridge
 
diff --git a/platform/mygo/capabilities.json b/platform/mygo/capabilities.json
index 0a14323a..32b4297e 100644
--- a/platform/mygo/capabilities.json
+++ b/platform/mygo/capabilities.json
@@ -30,7 +30,7 @@
         "extensions_test.go:TestLayoutGeometry",
         "layout_test.go:TestLayoutSharedTypographyAndSpacingRestoreInheritedValues"
       ],
-      "contractHash": "5b37ca2312b59c73d5ca14e59389ed49a11b1dc3710bdee1409ce9675f9d8c50"
+      "contractHash": "2b0005ed2f3e54d3678748d9eb0a731c4ad075ae07bddb12fc87d58413bfb99f"
     },
     "column": {
       "route": "render.go; style.go",
@@ -38,7 +38,7 @@
         "extensions_test.go:TestLayoutGeometry",
         "layout_test.go:TestLayoutSharedTypographyAndSpacingRestoreInheritedValues"
       ],
-      "contractHash": "6f35e51043ab8ae815796b2dd3a147f0a5e01b0fe15b9bab93f588710264f720"
+      "contractHash": "e1c4ba75a65b5346c3a0231c00d01f0ebaffd12eba823b625f75aa77c36e0bf8"
     },
     "grid": {
       "route": "render.go; style.go",
@@ -117,7 +117,7 @@
         "style_test.go:TestLayoutStyleViewportFractionsAndContainerFrameRemoval",
         "style_test.go:TestLayoutStyleShadowOpacityStatesAndRemoval"
       ],
-      "contractHash": "028237d9cea015c951093e45aa35dc7c3493f8a22f27106e43dfc506da741866"
+      "contractHash": "f5ed3d53bdef46b4bf03eef8188877933fa0c005203581850747ecd1423f2c49"
     },
     "text": {
       "route": "render.go; style.go",
@@ -2338,6 +2338,12 @@
       "evidence": [
         "controls_test.go:TestControlsCheckboxMixedDetail"
       ]
+    },
+    "shrink": {
+      "route": "style.go; MyGo Element.Shrink",
+      "evidence": [
+        "style_test.go:TestLayoutStyleViewportFractionsAndContainerFrameRemoval"
+      ]
     }
   },
   "events": {
diff --git a/platform/mygo/schema_generated.go b/platform/mygo/schema_generated.go
index 5c38f424..02f2bae8 100644
--- a/platform/mygo/schema_generated.go
+++ b/platform/mygo/schema_generated.go
@@ -291,12 +291,13 @@ var wireProperties = map[string]uint8{
 	"indeterminate":                  scalarBool,
 	"toggle-detail-enabled":          scalarBool,
 	"focus-within-enabled":           scalarBool,
+	"shrink":                         scalarFloat,
 }
 
 var contractKindProperties = map[string]map[string]bool{
 	"root":                {"accessibility-identifier": true, "theme": true, "theme-mode": true},
-	"row":                 {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "orientation": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "navigate-enabled": true, "grid-column-span": true, "pointer-capture": true, "focus-within-enabled": true},
-	"column":              {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true, "focus-within-enabled": true},
+	"row":                 {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "orientation": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "navigate-enabled": true, "grid-column-span": true, "pointer-capture": true, "focus-within-enabled": true, "shrink": true},
+	"column":              {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true, "focus-within-enabled": true, "shrink": true},
 	"grid":                {"gap": true, "main": true, "cross": true, "grow": true, "columns": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "appear-enabled": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
 	"stack":               {"grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "appear-enabled": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
 	"edge-inset":          {"gap": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "appear-enabled": true, "theme": true, "theme-mode": true, "edge": true, "visible": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
@@ -306,7 +307,7 @@ var contractKindProperties = map[string]map[string]bool{
 	"card":                {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
 	"alert":               {"text": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "variant": true, "appear-enabled": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "white-space": true, "text-overflow": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
 	"bubble":              {"text": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "variant": true, "appear-enabled": true, "text-alignment": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "white-space": true, "text-overflow": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true},
-	"box":                 {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "inert": true, "navigate-enabled": true, "grid-column-span": true, "pointer-capture": true, "focus-within-enabled": true},
+	"box":                 {"gap": true, "main": true, "cross": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-label": true, "accessibility-identifier": true, "style-class": true, "selected": true, "change-enabled": true, "toggle-enabled": true, "press-enabled": true, "appear-enabled": true, "role": true, "tree-level": true, "expanded": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "flex-wrap": true, "hover-foreground": true, "hover-border": true, "transition": true, "inert": true, "navigate-enabled": true, "grid-column-span": true, "pointer-capture": true, "focus-within-enabled": true, "shrink": true},
 	"text":                {"text": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "press-enabled": true, "appear-enabled": true, "text-alignment": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "white-space": true, "text-overflow": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true, "line-clamp": true},
 	"heading":             {"text": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "heading-level": true, "appear-enabled": true, "text-alignment": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "white-space": true, "text-overflow": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true, "line-clamp": true},
 	"paragraph":           {"text": true, "grow": true, "padding": true, "padding-horizontal": true, "padding-vertical": true, "padding-top": true, "padding-right": true, "padding-bottom": true, "padding-left": true, "margin": true, "margin-horizontal": true, "margin-vertical": true, "margin-top": true, "margin-right": true, "margin-bottom": true, "margin-left": true, "background": true, "foreground": true, "border-color": true, "border-width": true, "corner-radius": true, "width": true, "height": true, "min-width": true, "max-width": true, "min-height": true, "max-height": true, "container-relative-frame": true, "container-relative-frame-inset": true, "accessibility-identifier": true, "style-class": true, "appear-enabled": true, "text-alignment": true, "theme": true, "theme-mode": true, "alignment": true, "pointer-enabled": true, "data-attrs": true, "as": true, "opacity": true, "display": true, "font-size": true, "font-weight": true, "font-style": true, "line-height": true, "letter-spacing": true, "position": true, "inset": true, "inset-top": true, "inset-right": true, "inset-bottom": true, "inset-left": true, "z-index": true, "white-space": true, "text-overflow": true, "overflow": true, "user-select": true, "cursor": true, "shadow": true, "hover-background": true, "hover-opacity": true, "hover-shadow": true, "pressed-background": true, "pressed-opacity": true, "pressed-shadow": true, "focus-shadow": true, "focus-within-background": true, "focus-within-border": true, "selected-background": true, "selected-shadow": true, "selected-hover-shadow": true, "disabled-opacity": true, "width-viewport": true, "height-viewport": true, "min-width-viewport": true, "max-width-viewport": true, "min-height-viewport": true, "max-height-viewport": true, "font-family": true, "text-decoration": true, "hover-foreground": true, "hover-border": true, "transition": true, "grid-column-span": true, "line-clamp": true},
@@ -944,7 +945,7 @@ func contract_property_value_supported(property string, value contractWireValue)
 			value := contractMatch11.value.(string)
 			return contract_cross_alignment_supported(value)
 		}
-		if contractMatch10 == "grow" && (contractMatch11.kind == scalarFloat && (true)) {
+		if (contractMatch10 == "grow" || contractMatch10 == "shrink") && (contractMatch11.kind == scalarFloat && (true)) {
 			value := contractMatch11.value.(float64)
 			return (contract_is_finite(value) && (value >= float64(0.0)))
 		}
diff --git a/platform/mygo/style.go b/platform/mygo/style.go
index 0c0fd000..b26709e8 100644
--- a/platform/mygo/style.go
+++ b/platform/mygo/style.go
@@ -50,7 +50,7 @@ func (b *Backend) style(c *ui.Context, n Node, e ui.Element, focusWithin func(ui
 		e.Label(label)
 	}
 	numeric := map[string]func(float32) ui.Element{
-		"grow": e.Grow, "width": e.Width, "height": e.Height,
+		"grow": e.Grow, "shrink": e.Shrink, "width": e.Width, "height": e.Height,
 		"min-width": e.MinWidth, "max-width": e.MaxWidth, "min-height": e.MinHeight, "max-height": e.MaxHeight,
 		"opacity": e.Opacity, "border-width": func(v float32) ui.Element { return e.BorderWidth(v) },
 		"corner-radius": func(v float32) ui.Element { return e.Radius(v) },
diff --git a/platform/mygo/style_test.go b/platform/mygo/style_test.go
index fea5f580..8e31a192 100644
--- a/platform/mygo/style_test.go
+++ b/platform/mygo/style_test.go
@@ -33,6 +33,17 @@ func TestLayoutStyleViewportFractionsAndContainerFrameRemoval(t *testing.T) {
 	r = layoutRect(t, tester, "viewport child")
 	layoutNear(t, "removed frame width", r.W, 40)
 	layoutNear(t, "removed frame height", r.H, 20)
+	apply(t, b, 5, create(5, "row"), prop(5, "width", 100), prop(5, "height", 20), insert(2, 5, 1),
+		create(6, "box"), prop(6, "width", 80), prop(6, "min-width", 0), prop(6, "height", 20), prop(6, "accessibility-label", "shrink child"), insert(5, 6, 0),
+		create(7, "box"), prop(7, "width", 80), prop(7, "min-width", 0), prop(7, "height", 20), insert(5, 7, 1))
+	tester.Frame()
+	layoutNear(t, "omitted shrink retains factor one", layoutRect(t, tester, "shrink child").W, 50)
+	apply(t, b, 6, prop(6, "shrink", 0.0))
+	tester.Frame()
+	layoutNear(t, "zero shrink preserves authored basis", layoutRect(t, tester, "shrink child").W, 80)
+	apply(t, b, 7, Operation{Op: "remove-prop", ID: 6, Property: "shrink"})
+	tester.Frame()
+	layoutNear(t, "removed shrink restores factor one", layoutRect(t, tester, "shrink child").W, 50)
 }
 
 func TestLayoutStyleRelativeAbsoluteOffsetsAndRemoval(t *testing.T) {
@@ -343,7 +354,7 @@ func TestLayoutStyleOklchColorUsesNativeColorConversion(t *testing.T) {
 }
 
 func TestLayoutStyleUserSelectionCursorAndRemoval(t *testing.T) {
-	b := layoutBackend(t, "box", nil, prop(2, "user-select", "text"), prop(2, "cursor", "pointer"), prop(2,"pressed-background","#00ff00"), create(3, "text"), prop(3, "text", "copy words"), prop(3, "font-size", "24px"), insert(2, 3, 0))
+	b := layoutBackend(t, "box", nil, prop(2, "user-select", "text"), prop(2, "cursor", "pointer"), prop(2, "pressed-background", "#00ff00"), create(3, "text"), prop(3, "text", "copy words"), prop(3, "font-size", "24px"), insert(2, 3, 0))
 	tester := ui.NewTester(b.View, 300, 120)
 	r := layoutRect(t, tester, "copy words")
 	tester.Move(r.X+10, r.Y+r.H/2)
diff --git a/platform/web/melange/render/lui_web_props.ml b/platform/web/melange/render/lui_web_props.ml
index 55437662..bd454721 100644
--- a/platform/web/melange/render/lui_web_props.ml
+++ b/platform/web/melange/render/lui_web_props.ml
@@ -811,6 +811,8 @@ let rec apply_property renderer queue_split node kind dom_node property
       set_style dom_node "align-items" (cross_alignment_value alignment)
   | GrowValue, FloatValue grow ->
       set_style dom_node "flex-grow" (Js.Float.toString grow)
+  | ShrinkValue, FloatValue shrink ->
+      set_style dom_node "flex-shrink" (Js.Float.toString shrink)
   | GridColumns, IntValue columns -> apply_grid_columns dom_node columns
   | GridColumnSpan, IntValue span ->
       set_style dom_node "grid-column" ("span " ^ string_of_int span ^ " / span " ^ string_of_int span)
@@ -1279,6 +1281,7 @@ let remove_property renderer queue_split node kind dom_node property =
        | MainAlignment -> set_style dom_node "justify-content" ""
        | CrossAlignment -> set_style dom_node "align-items" ""
        | GrowValue -> set_style dom_node "flex-grow" ""
+       | ShrinkValue -> set_style dom_node "flex-shrink" ""
        | GridColumns ->
            set_style dom_node "grid-auto-flow" "";
            set_style dom_node "grid-auto-columns" "";
diff --git a/schema/components.json b/schema/components.json
index 65d0af7e..ea18629e 100644
--- a/schema/components.json
+++ b/schema/components.json
@@ -1856,6 +1856,11 @@
       "lg": "FocusWithinEnabled",
       "wire": "focus-within-enabled",
       "swift": "focusWithinEnabled"
+    },
+    {
+      "lg": "ShrinkValue",
+      "wire": "shrink",
+      "swift": "shrink"
     }
   ],
   "events": [
@@ -2276,10 +2281,12 @@
     ],
     "row": [
       "orientation",
-      "focus-within-enabled"
+      "focus-within-enabled",
+      "shrink"
     ],
     "column": [
-      "focus-within-enabled"
+      "focus-within-enabled",
+      "shrink"
     ],
     "list-item": [
       "display"
@@ -2302,7 +2309,8 @@
     ],
     "box": [
       "inert",
-      "focus-within-enabled"
+      "focus-within-enabled",
+      "shrink"
     ],
     "popover": [
       "collision-padding"
diff --git a/schema/mygo-manifest.json b/schema/mygo-manifest.json
index 6db72d99..607a4ae5 100644
--- a/schema/mygo-manifest.json
+++ b/schema/mygo-manifest.json
@@ -1,13 +1,13 @@
 {
   "version": 1,
   "sourceHashes": {
-    "schema/components.json": "b89403cbbba99f8559aab6b2392301d87682c090df87b4508825d891759860fd",
-    "src/lui_protocol.ml": "9550ac6d4f88c764758db1ae5909e2915cdae1b455b9e96fd32d417f030eec21",
-    "src/lui_protocol.mli": "30ee5de82811ffff64dae818dd84597689bc1beae413f12ba4da010ca82b9aa6",
-    "src/lui_wire_schema.ml": "2f451922adfe58e144ca29b3f0ad21b9b195bb0ccf269322a6a975baaa527a3c",
+    "schema/components.json": "50b63836550156cd7244bf0aabcea04cd4852166d18089155ecc771a2dbd39a6",
+    "src/lui_protocol.ml": "835442f99097604deb8ac4c3c8f7a75e58433e26ce505ebb21204ff09ef24126",
+    "src/lui_protocol.mli": "8e1cd3b5455f64bf13fdcbcff6c27d89a6535ff76b41f2f5439dedda44a883e9",
+    "src/lui_wire_schema.ml": "312a87bfc912194bc6608af7a43b9cadbf53c3ac6985ca7fd247cab4377357e5",
     "tooling/export_mygo_contract.ml": "246ade7e088225ad68d25ce5ebc96a6a850fec3e66e1aa9d9debbd720e04bab1"
   },
-  "generatedGoHash": "805e4cdaa0d83c19046193ac53ecdbb6464156ec301031f15825f4a73c50a002",
+  "generatedGoHash": "107980e57e46a8404d3a4b040a8d9ababa185028ce7125429ea28bb30fd954eb",
   "kinds": {
     "root": {
       "contractHash": "1cda829a4bd05ddb79ca21f04ed1d7a51dae8bf3d388bb7eecdf8d5e2f3ec1eb",
@@ -17,15 +17,15 @@
       "baseline": {}
     },
     "row": {
-      "contractHash": "5b37ca2312b59c73d5ca14e59389ed49a11b1dc3710bdee1409ce9675f9d8c50",
-      "propertyCount": 96,
+      "contractHash": "2b0005ed2f3e54d3678748d9eb0a731c4ad075ae07bddb12fc87d58413bfb99f",
+      "propertyCount": 97,
       "childCount": 81,
       "eventCount": 12,
       "baseline": {}
     },
     "column": {
-      "contractHash": "6f35e51043ab8ae815796b2dd3a147f0a5e01b0fe15b9bab93f588710264f720",
-      "propertyCount": 93,
+      "contractHash": "e1c4ba75a65b5346c3a0231c00d01f0ebaffd12eba823b625f75aa77c36e0bf8",
+      "propertyCount": 94,
       "childCount": 81,
       "eventCount": 9,
       "baseline": {}
@@ -99,8 +99,8 @@
       "baseline": {}
     },
     "box": {
-      "contractHash": "028237d9cea015c951093e45aa35dc7c3493f8a22f27106e43dfc506da741866",
-      "propertyCount": 95,
+      "contractHash": "f5ed3d53bdef46b4bf03eef8188877933fa0c005203581850747ecd1423f2c49",
+      "propertyCount": 96,
       "childCount": 81,
       "eventCount": 12,
       "baseline": {}
diff --git a/src/lui_elements.ml b/src/lui_elements.ml
index 2cda3752..5971cfba 100644
--- a/src/lui_elements.ml
+++ b/src/lui_elements.ml
@@ -702,12 +702,13 @@ let apply_pointer_events context node ?on_press_detail ?on_pointer_down
   Option.iter (register_pointer_down context node) on_pointer_down;
   Option.iter (register_pointer_up context node) on_pointer_up;
   Option.iter (register_context_menu_press context node) on_context_menu
-let apply_universal context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition =
+let apply_universal ?shrink context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition =
   Option.iter (Lui_ui.key context node) key;
   Option.iter (Lui_ui.int_property context node Gap) gap;
   Option.iter (Lui_ui.string_property context node MainAlignment) (Option.map main_alignment_value main);
   Option.iter (Lui_ui.string_property context node CrossAlignment) (Option.map cross_alignment_value cross);
   Option.iter (Lui_ui.float_property context node GrowValue) grow;
+  Option.iter (Lui_ui.float_property context node ShrinkValue) shrink;
   Option.iter (Lui_ui.int_property context node GridColumns) columns;
   Option.iter (Lui_ui.int_property context node PaddingValue) padding;
   Option.iter (Lui_ui.int_property context node PaddingHorizontal) padding_horizontal;
@@ -754,11 +755,11 @@ let apply_universal context node ~key ~gap ~main ~cross ~grow ~columns ~padding
   Option.iter (register_pointer_leave context node) on_pointer_leave;
   Option.iter (Lui_ui.string_property context node Transition) transition
 
-let row ?as_ ?key ?gap ?main ?cross ?grow ?columns ?orientation ?orientation_signal ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?max_width ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?pointer_capture ?on_pointer_down ?on_pointer_move ?on_pointer_up ?on_pointer_cancel ?on_navigation_key ?opacity ?opacity_signal ?display ?flex_wrap ?transition (children : t list) : t =
+let row ?as_ ?key ?gap ?main ?cross ?grow ?shrink ?columns ?orientation ?orientation_signal ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?max_width ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?pointer_capture ?on_pointer_down ?on_pointer_move ?on_pointer_up ?on_pointer_cancel ?on_navigation_key ?opacity ?opacity_signal ?display ?flex_wrap ?transition (children : t list) : t =
  fun context parent ->
   let node = Lui_ui.row context in
   Option.iter (fun tag -> Lui_ui.string_property context node As (element_tag_value tag)) as_;
-  apply_universal context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
+  apply_universal ?shrink context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
   Option.iter (Lui_ui.float_property context node Opacity) opacity;
   Option.iter (Lui_ui.float_property_signal context node Opacity) opacity_signal;
   Option.iter (Lui_ui.string_property context node DisplayValue) (Option.map display_value display);
@@ -776,11 +777,11 @@ let row ?as_ ?key ?gap ?main ?cross ?grow ?columns ?orientation ?orientation_sig
   mount_children context node children;
   node
 
-let column ?as_ ?key ?gap ?main ?cross ?grow ?grow_signal ?columns ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?min_width_signal ?max_width ?max_width_signal ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?on_press_detail ?on_pointer_down ?on_pointer_up ?opacity ?opacity_signal ?display ?display_signal ?flex_wrap ?transition (children : t list) : t =
+let column ?as_ ?key ?gap ?main ?cross ?grow ?shrink ?grow_signal ?columns ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?min_width_signal ?max_width ?max_width_signal ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?on_press_detail ?on_pointer_down ?on_pointer_up ?opacity ?opacity_signal ?display ?display_signal ?flex_wrap ?transition (children : t list) : t =
  fun context parent ->
   let node = Lui_ui.column context in
   Option.iter (fun tag -> Lui_ui.string_property context node As (element_tag_value tag)) as_;
-  apply_universal context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
+  apply_universal ?shrink context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
   Option.iter (Lui_ui.float_property_signal context node GrowValue) grow_signal;
   Option.iter (Lui_ui.int_property_signal context node MinWidth) min_width_signal;
   Option.iter (Lui_ui.int_property_signal context node MaxWidth) max_width_signal;
@@ -907,10 +908,10 @@ let bubble ?key ?gap ?main ?cross ?grow ?columns ?padding ?padding_horizontal ?p
   mount_children context node children;
   node
 
-let box ?key ?gap ?main ?cross ?grow ?columns ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?max_width ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?pointer_capture ?on_pointer_down ?on_pointer_move ?on_pointer_up ?on_pointer_cancel ?on_navigation_key ?opacity ?opacity_signal ?display ?flex_wrap ?inert ?inert_signal ?transition (children : t list) : t =
+let box ?key ?gap ?main ?cross ?grow ?shrink ?columns ?padding ?padding_horizontal ?padding_vertical ?margin ?margin_horizontal ?margin_vertical ?margin_top ?margin_right ?margin_bottom ?margin_left ?background ?foreground ?border_color ?border_width ?corner_radius ?width ?height ?min_width ?max_width ?min_height ?max_height ?container_relative_frame ?container_relative_frame_inset ?accessibility_identifier ?accessibility_identifier_signal ?foreground_signal ?background_signal ?style_class ?data_attrs ?data_attrs_signal ?on_focus_within ?on_appear ?on_pointer_enter ?on_pointer_leave ?pointer_capture ?on_pointer_down ?on_pointer_move ?on_pointer_up ?on_pointer_cancel ?on_navigation_key ?opacity ?opacity_signal ?display ?flex_wrap ?inert ?inert_signal ?transition (children : t list) : t =
  fun context parent ->
   let node = Lui_ui.box context in
-  apply_universal context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
+  apply_universal ?shrink context node ~key ~gap ~main ~cross ~grow ~columns ~padding ~padding_horizontal ~padding_vertical ~margin ~margin_horizontal ~margin_vertical ~margin_top ~margin_right ~margin_bottom ~margin_left ~background ~foreground ~border_color ~border_width ~corner_radius ~width ~height ~min_width ~max_width ~min_height ~max_height ~container_relative_frame ~container_relative_frame_inset ~accessibility_identifier ~accessibility_identifier_signal ~foreground_signal ~background_signal ~style_class ~data_attrs ~data_attrs_signal ~on_appear ~on_pointer_enter ~on_pointer_leave ~transition;
   Option.iter (Lui_ui.float_property context node Opacity) opacity;
   Option.iter (Lui_ui.float_property_signal context node Opacity) opacity_signal;
   Option.iter (Lui_ui.string_property context node DisplayValue) (Option.map display_value display);
diff --git a/src/lui_elements.mli b/src/lui_elements.mli
index e9f974f3..c598271f 100644
--- a/src/lui_elements.mli
+++ b/src/lui_elements.mli
@@ -325,6 +325,7 @@ val register_resize :
     a web DOM contract for delegated-event readers, CSS attribute
     selectors and e2e locators; native hosts parse-ignore the prop. *)
 val apply_universal :
+  ?shrink:float ->
   Lui_ui.ui_context ->
   int ->
   key:string option ->
@@ -374,6 +375,7 @@ val row :
   ?main:main_alignment ->
   ?cross:cross_alignment ->
   ?grow:float ->
+  ?shrink:float ->
   ?columns:int ->
   ?orientation:orientation ->
   ?orientation_signal:orientation Signal.signal ->
@@ -429,6 +431,7 @@ val column :
   ?main:main_alignment ->
   ?cross:cross_alignment ->
   ?grow:float ->
+  ?shrink:float ->
   ?grow_signal:float Signal.signal ->
   ?columns:int ->
   ?padding:int ->
@@ -904,6 +907,7 @@ val box :
   ?main:main_alignment ->
   ?cross:cross_alignment ->
   ?grow:float ->
+  ?shrink:float ->
   ?columns:int ->
   ?padding:int ->
   ?padding_horizontal:int ->
diff --git a/src/lui_protocol.ml b/src/lui_protocol.ml
index 2f4b83ab..64f7fad8 100644
--- a/src/lui_protocol.ml
+++ b/src/lui_protocol.ml
@@ -311,6 +311,7 @@ type property =
   | Indeterminate
   | ToggleDetailEnabled
   | FocusWithinEnabled
+  | ShrinkValue
 
 module Property_map =
   Map.Make
@@ -978,6 +979,7 @@ let common_property_supported kind property =
     || horizontal_container kind
   | GrowValue ->
     kind <> Avatar && (not (modal_surface kind)) && kind <> Tooltip
+  | ShrinkValue -> kind = Row || kind = Column || kind = Box
   | GridColumns -> kind = Grid
   | GridColumnSpan -> kind <> Root && not (modal_surface kind) && kind <> Tooltip
   | PaddingValue | PaddingHorizontal | PaddingVertical
@@ -1626,7 +1628,7 @@ let property_value_supported property value =
   | Gap, IntValue value -> value >= 0
   | MainAlignment, StringValue value -> main_alignment_supported value
   | CrossAlignment, StringValue value -> cross_alignment_supported value
-  | GrowValue, FloatValue value -> is_finite value && value >= 0.0
+  | (GrowValue | ShrinkValue), FloatValue value -> is_finite value && value >= 0.0
   | GridColumns, IntValue value -> value >= 0
   | GridColumnSpan, IntValue value -> value > 0
   | PaddingValue, IntValue _ -> true
diff --git a/src/lui_protocol.mli b/src/lui_protocol.mli
index 6a804d27..1b4fb008 100644
--- a/src/lui_protocol.mli
+++ b/src/lui_protocol.mli
@@ -309,6 +309,7 @@ type property =
   | Indeterminate
   | ToggleDetailEnabled
   | FocusWithinEnabled
+  | ShrinkValue
 
 module Property_map : Map.S with type key = property
 
diff --git a/src/lui_runtime.ml b/src/lui_runtime.ml
index 3b4d77f7..24a120b6 100644
--- a/src/lui_runtime.ml
+++ b/src/lui_runtime.ml
@@ -1856,6 +1856,11 @@ let set_prop application node property value =
          invalid_arg "focus-within observation is unsupported by backend profile");
   let node = canonical_node application node in
   let kind = require_standard_node_kind application node in
+  if property = ShrinkValue then
+    (match application.runtime_backend.backend_profile.profile_host with
+     | WebHost | MyGoHost -> ()
+     | GenericHost | SwiftUIHost | KotlinHost ->
+         invalid_arg "shrink is unsupported by backend profile");
   if not (property_supported kind property) then
     invalid_arg
       (Printf.sprintf
diff --git a/src/lui_wire_schema.ml b/src/lui_wire_schema.ml
index a4d06b4b..2cd72b3e 100644
--- a/src/lui_wire_schema.ml
+++ b/src/lui_wire_schema.ml
@@ -383,6 +383,7 @@ let property_name property =
   | Indeterminate -> "indeterminate"
   | ToggleDetailEnabled -> "toggle-detail-enabled"
   | FocusWithinEnabled -> "focus-within-enabled"
+  | ShrinkValue -> "shrink"
 
 let kind_property_matrix kind =
   match kind with
@@ -412,13 +413,13 @@ let kind_extra_properties kind =
   | Checkbox -> [ Gap; LabelOpacity; IndicatorBorderColor; CheckedIndicatorBorderColor ]
   | Radio -> [ Gap; LabelOpacity ]
   | Grid -> [ MainAlignment; CrossAlignment ]
-  | Row -> [ OrientationValue; FocusWithinEnabled ]
-  | Column -> [ FocusWithinEnabled ]
+  | Row -> [ OrientationValue; FocusWithinEnabled; ShrinkValue ]
+  | Column -> [ FocusWithinEnabled; ShrinkValue ]
   | ListItem -> [ DisplayValue ]
   | Dialog -> [ DescriptionValue; BackgroundValue; ForegroundValue; BorderColorValue; BorderWidth; CornerRadius; Gap; Transition ]
   | Drawer -> [ Transition ]
   | Sheet -> [ Transition ]
-  | Box -> [ Inert; FocusWithinEnabled ]
+  | Box -> [ Inert; FocusWithinEnabled; ShrinkValue ]
   | Popover -> [ CollisionPadding ]
   | DropdownMenu -> [ CollisionPadding ]
   | Tooltip -> [ CollisionPadding ]
@@ -434,7 +435,7 @@ let kind_extra_properties kind =
 
 let all_node_kinds = [ Root; Row; Column; Grid; Stack; EdgeInset; Overlay; ViewThatFits; Panel; Card; Alert; Bubble; Box; Text; Heading; Paragraph; Label; Button; ToggleButton; Toggle; RadioGroup; Radio; Slider; NumberStepper; TextField; SecureField; Input; SearchField; Textarea; Checkbox; SwitchControl; Progress; Divider; Scroll; ListContainer; VirtualList; Tabs; BottomTabs; BottomTab; ButtonGroup; ToggleGroup; Spacer; Spinner; Icon; Select; Combobox; DropdownMenu; ContextMenu; MenuItem; MenuTrigger; ListItem; Avatar; Image; MediaSurface; Stepper; Step; Timeline; TimelineItem; InputGroup; InputGroupActions; Breadcrumb; Pagination; Accordion; Table; TableRow; TableCell; Tree; Resizable; Split; Dialog; Drawer; Sheet; Tooltip; Toast; Toolbar; StatusBar; ListSection; ListSectionHeader; ListSectionFooter; SwipeActions; SwipeAction; FilePicker; Kbd; Link; FileImage; FilePreview; Popover ]
 
-let all_properties = [ TextValue; Enabled; Gap; MainAlignment; CrossAlignment; GrowValue; GridColumns; PaddingValue; PaddingHorizontal; PaddingVertical; PaddingTop; PaddingRight; PaddingBottom; PaddingLeft; MarginValue; MarginHorizontal; MarginVertical; MarginTop; MarginRight; MarginBottom; MarginLeft; BackgroundValue; ForegroundValue; BorderColorValue; BorderWidth; CornerRadius; WidthValue; HeightValue; MinWidth; MaxWidth; MinHeight; MaxHeight; ContainerRelativeFrameValue; ContainerRelativeFrameInset; PlaceholderValue; AccessibilityLabel; AccessibilityIdentifier; StyleClass; HeadingLevel; Checked; ProgressValue; OrientationValue; PlacementValue; SizeValue; IconName; VariantValue; InlineIconName; IconPlacementValue; SelectionPlacementValue; Selected; Autofocus; SubmitOnEnter; LongPressEnabled; ChangeEnabled; ToggleEnabled; PressEnabled; SubmitEnabled; DoublePressEnabled; AppearEnabled; ImageIdValue; SurfaceIdValue; ActiveIndex; TitleValue; DescriptionValue; MetaValue; IndicatorValue; Connector; SourceX; SourceY; SourceWidth; SourceHeight; AnchorValue; AnchorTarget; AnchorAlignmentValue; AnchorOffset; TooltipDelay; DurationValue; TextAlignment; RoleValue; TreeLevel; Expanded; ResizeDuration; ResizeEasing; ResizeOrigin; ThemeValue; ThemeMode; KeyValue; SeparatorValue; StyleValue; ScrollTarget; ScrollAnchor; ScrollToken; ScrollAnimated; TrackVisibleRange; EdgeValue; PickerRequest; PickerTypes; PickerMultiple; PickerSource; PickerCompletion; MinValue; MaxValue; StepValue; Detents; Sizing; PathValue; UrlValue; MaxPixelSize; ImageFitValue; Visible; AlignmentValue; PointerEnabled; DataAttrs; As; AltValue; LoadingValue; ReferrerPolicy; TargetValue; Opacity; DisplayValue; TooltipText; TooltipKeys; InputType; PickerAccept; PickerDirectory; PopupX; PopupY; AvailableHeight; FontSize; FontWeight; FontStyle; LineHeight; LetterSpacing; Position; Inset; InsetTop; InsetRight; InsetBottom; InsetLeft; ZIndex; WhiteSpace; TextOverflow; Overflow; UserSelect; Cursor; Shadow; HoverBackground; HoverOpacity; HoverShadow; PressedBackground; PressedOpacity; PressedShadow; FocusShadow; FocusWithinBackground; FocusWithinBorder; SelectedBackground; SelectedShadow; SelectedHoverShadow; DisabledOpacity; WidthViewport; HeightViewport; MinWidthViewport; MaxWidthViewport; MinHeightViewport; MaxHeightViewport; FontFamily; TextDecoration; ListStyle; FlexWrap; HoverForeground; HoverBorder; Transition; Inert; NavigateEnabled; FirstPaneWidth; GridColumnSpan; LabelOpacity; SubmitOnBlur; AnchorAlignmentOffset; AnchorRect; ResizeHandleWidth; ResizeHandleOffset; IndicatorBorderColor; CheckedIndicatorBorderColor; CollisionPadding; LineClamp; ReadOnly; VirtualOverscan; VirtualItemExtent; VirtualTotalCount; VirtualGeneration; VirtualIndices; VirtualScrollIndex; PointerCapture; Indeterminate; ToggleDetailEnabled; FocusWithinEnabled ]
+let all_properties = [ TextValue; Enabled; Gap; MainAlignment; CrossAlignment; GrowValue; GridColumns; PaddingValue; PaddingHorizontal; PaddingVertical; PaddingTop; PaddingRight; PaddingBottom; PaddingLeft; MarginValue; MarginHorizontal; MarginVertical; MarginTop; MarginRight; MarginBottom; MarginLeft; BackgroundValue; ForegroundValue; BorderColorValue; BorderWidth; CornerRadius; WidthValue; HeightValue; MinWidth; MaxWidth; MinHeight; MaxHeight; ContainerRelativeFrameValue; ContainerRelativeFrameInset; PlaceholderValue; AccessibilityLabel; AccessibilityIdentifier; StyleClass; HeadingLevel; Checked; ProgressValue; OrientationValue; PlacementValue; SizeValue; IconName; VariantValue; InlineIconName; IconPlacementValue; SelectionPlacementValue; Selected; Autofocus; SubmitOnEnter; LongPressEnabled; ChangeEnabled; ToggleEnabled; PressEnabled; SubmitEnabled; DoublePressEnabled; AppearEnabled; ImageIdValue; SurfaceIdValue; ActiveIndex; TitleValue; DescriptionValue; MetaValue; IndicatorValue; Connector; SourceX; SourceY; SourceWidth; SourceHeight; AnchorValue; AnchorTarget; AnchorAlignmentValue; AnchorOffset; TooltipDelay; DurationValue; TextAlignment; RoleValue; TreeLevel; Expanded; ResizeDuration; ResizeEasing; ResizeOrigin; ThemeValue; ThemeMode; KeyValue; SeparatorValue; StyleValue; ScrollTarget; ScrollAnchor; ScrollToken; ScrollAnimated; TrackVisibleRange; EdgeValue; PickerRequest; PickerTypes; PickerMultiple; PickerSource; PickerCompletion; MinValue; MaxValue; StepValue; Detents; Sizing; PathValue; UrlValue; MaxPixelSize; ImageFitValue; Visible; AlignmentValue; PointerEnabled; DataAttrs; As; AltValue; LoadingValue; ReferrerPolicy; TargetValue; Opacity; DisplayValue; TooltipText; TooltipKeys; InputType; PickerAccept; PickerDirectory; PopupX; PopupY; AvailableHeight; FontSize; FontWeight; FontStyle; LineHeight; LetterSpacing; Position; Inset; InsetTop; InsetRight; InsetBottom; InsetLeft; ZIndex; WhiteSpace; TextOverflow; Overflow; UserSelect; Cursor; Shadow; HoverBackground; HoverOpacity; HoverShadow; PressedBackground; PressedOpacity; PressedShadow; FocusShadow; FocusWithinBackground; FocusWithinBorder; SelectedBackground; SelectedShadow; SelectedHoverShadow; DisabledOpacity; WidthViewport; HeightViewport; MinWidthViewport; MaxWidthViewport; MinHeightViewport; MaxHeightViewport; FontFamily; TextDecoration; ListStyle; FlexWrap; HoverForeground; HoverBorder; Transition; Inert; NavigateEnabled; FirstPaneWidth; GridColumnSpan; LabelOpacity; SubmitOnBlur; AnchorAlignmentOffset; AnchorRect; ResizeHandleWidth; ResizeHandleOffset; IndicatorBorderColor; CheckedIndicatorBorderColor; CollisionPadding; LineClamp; ReadOnly; VirtualOverscan; VirtualItemExtent; VirtualTotalCount; VirtualGeneration; VirtualIndices; VirtualScrollIndex; PointerCapture; Indeterminate; ToggleDetailEnabled; FocusWithinEnabled; ShrinkValue ]
 
 
 type view_value =
@@ -490,14 +491,14 @@ let view_contract = function
   | Row -> Some {
       view_result = "t";
       view_children = ViewList "t";
-      view_properties = [(As, view_element_tag, false); (KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (GridColumns, ViewInt, false); (OrientationValue, view_orientation, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (PointerCapture, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
+      view_properties = [(As, view_element_tag, false); (KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (ShrinkValue, ViewFloat, false); (GridColumns, ViewInt, false); (OrientationValue, view_orientation, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (PointerCapture, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
       view_events = ["focus-within-changed"; "appear"; "pointer-enter"; "pointer-leave"; "pointer-down"; "pointer-move"; "pointer-up"; "pointer-cancel"; "navigation-key"];
       view_slots = [];
     }
   | Column -> Some {
       view_result = "t";
       view_children = ViewList "t";
-      view_properties = [(As, view_element_tag, false); (KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (GridColumns, ViewInt, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
+      view_properties = [(As, view_element_tag, false); (KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (ShrinkValue, ViewFloat, false); (GridColumns, ViewInt, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
       view_events = ["focus-within-changed"; "appear"; "pointer-enter"; "pointer-leave"; "press-detail"; "pointer-down"; "pointer-up"];
       view_slots = [];
     }
@@ -567,7 +568,7 @@ let view_contract = function
   | Box -> Some {
       view_result = "t";
       view_children = ViewList "t";
-      view_properties = [(KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (GridColumns, ViewInt, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (PointerCapture, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Inert, ViewBool, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
+      view_properties = [(KeyValue, ViewString, false); (Gap, ViewInt, false); (MainAlignment, view_main_alignment, false); (CrossAlignment, view_cross_alignment, false); (GrowValue, ViewFloat, false); (ShrinkValue, ViewFloat, false); (GridColumns, ViewInt, false); (PaddingValue, ViewInt, false); (PaddingHorizontal, ViewInt, false); (PaddingVertical, ViewInt, false); (MarginValue, ViewInt, false); (MarginHorizontal, ViewInt, false); (MarginVertical, ViewInt, false); (MarginTop, ViewInt, false); (MarginRight, ViewInt, false); (MarginBottom, ViewInt, false); (MarginLeft, ViewInt, false); (BackgroundValue, ViewString, false); (ForegroundValue, ViewString, false); (BorderColorValue, ViewString, false); (BorderWidth, ViewInt, false); (CornerRadius, ViewInt, false); (WidthValue, ViewInt, false); (HeightValue, ViewInt, false); (MinWidth, ViewInt, false); (MaxWidth, ViewInt, false); (MinHeight, ViewInt, false); (MaxHeight, ViewInt, false); (ContainerRelativeFrameValue, view_frame_axes, false); (ContainerRelativeFrameInset, ViewInt, false); (AccessibilityIdentifier, ViewString, false); (StyleClass, ViewString, false); (DataAttrs, ViewAttributes, false); (FocusWithinEnabled, ViewBool, false); (PointerCapture, ViewBool, false); (Opacity, ViewFloat, false); (DisplayValue, view_display, false); (FlexWrap, view_flex_wrap, false); (Inert, ViewBool, false); (Transition, ViewString, false); (AlignmentValue, view_alignment, false)];
       view_events = ["focus-within-changed"; "appear"; "pointer-enter"; "pointer-leave"; "pointer-down"; "pointer-move"; "pointer-up"; "pointer-cancel"; "navigation-key"];
       view_slots = [];
     }
diff --git a/test/test_lui.ml b/test/test_lui.ml
index 15df5468..18fcbb24 100644
--- a/test/test_lui.ml
+++ b/test/test_lui.ml
@@ -1713,6 +1713,54 @@ let test_drop_large_subtree_is_one_detach () =
     Alcotest.failf "dropping 4x nodes took %gs after %gs" elapsed_large
       elapsed_small
 
+let test_shrink_contract () =
+  let open Lui_protocol in
+  let shrink = Lui_wire.property_of_name "shrink" in
+  List.iter (fun kind ->
+    Alcotest.(check bool) "shrink is restricted to layout containers"
+      (List.mem kind [Row; Column; Box]) (property_supported kind shrink))
+    Lui_wire_schema.all_node_kinds;
+  List.iter (fun (value, accepted) ->
+    Alcotest.(check bool) "shrink accepts only finite nonnegative floats"
+      accepted (property_value_supported shrink value))
+    [FloatValue 0., true; FloatValue 1.5, true; FloatValue (-1.), false;
+     FloatValue nan, false; FloatValue infinity, false; IntValue 0, false];
+  let mount ?shrink host configure =
+    let backend = { (recording_backend ()) with
+      backend_profile = profile GenericOS host } in
+    Lui_app.create backend () (fun model () -> model)
+      (fun _ _ _ context parent ->
+        let node = Lui_elements.row ?shrink [] context parent in
+        configure context node;
+        node)
+  in
+  List.iter (fun host ->
+    let set = ref (fun () -> ()) and remove = ref (fun () -> ()) in
+    let app = mount host (fun context node ->
+      set := (fun () -> Lui_ui.float_property context node shrink 0.);
+      remove := (fun () ->
+        Lui_runtime.remove_prop context.Lui_ui.ui_application node shrink)) in
+    flush_app app;
+    Alcotest.(check bool) "omitted shrink leaves the host default" false
+      (List.exists (function SetProp (_, p, _) -> p = shrink | _ -> false) (all_ops ()));
+    !set ();
+    flush_app app;
+    Alcotest.(check bool) "supported host receives explicit nonshrink" true
+      (List.exists (function SetProp (_, p, FloatValue 0.) -> p = shrink | _ -> false) (all_ops ()));
+    !remove ();
+    flush_app app;
+    Alcotest.(check bool) "removal restores the host default" true
+      (List.exists (function RemoveProp (_, p) -> p = shrink | _ -> false) (all_ops ()));
+    Alcotest.(check bool) "shrink does not author grow" false
+      (List.exists (function SetProp (_, GrowValue, _) -> true | _ -> false) (all_ops ()));
+    ignore (Lui_app.dispose app))
+    [WebHost; MyGoHost];
+  List.iter (fun host ->
+    Alcotest.check_raises "unsupported host rejects opt-in"
+      (Invalid_argument "shrink is unsupported by backend profile")
+      (fun () -> ignore (mount ~shrink:0. host (fun _ _ -> ()))))
+    [GenericHost; SwiftUIHost; KotlinHost]
+
 let test_float_encoding_rejects_non_finite () =
   let open Lui_protocol in
   Alcotest.check_raises "nan rejected"
@@ -5666,6 +5714,7 @@ let () =
             test_data_attrs_protocol;
           Alcotest.test_case "finite float encoding" `Quick
             test_float_encoding_rejects_non_finite;
+          Alcotest.test_case "shrink contract" `Quick test_shrink_contract;
           Alcotest.test_case "as protocol" `Quick test_as_protocol;
           Alcotest.test_case "data-attrs + as emit" `Quick
             test_data_attrs_and_as_emit;