diff --git a/docs/plan-composite-params.md b/docs/plan-composite-params.md
index 0f75e17..a00e07c 100644
--- a/docs/plan-composite-params.md
+++ b/docs/plan-composite-params.md
@@ -7,12 +7,13 @@
 > random-noise, linear-gradient, color-spectrum, random-colors, draw-grid,
 > placeholder, fit-on-background, change-canvas-size, resize, crop); **составной
 > тип `color-pair` полностью переведён** (4 инструмента: blend-two,
-> step-colors, linear-gradient, two-colors); preview
+> step-colors, linear-gradient, two-colors); **составной тип `offset`
+> полностью переведён** (4 инструмента: circle-mask, square-mask,
+> star-mask, wavy-mask); preview
 > научен применять **генераторы** (`executeGenerate`, кнопка Generate) и
 > рендерить все kinds схемы (slider/number/color/select/checkbox/dimension/
-> color-pair).
-> Следующее: `offset` (пилот circle-mask-png → square-mask → star-mask →
-> wavy-mask).
+> color-pair/offset).
+> Следующее: `position9` (add-text → date-stamp → watermark-image).
 >
 > Ключевые файлы нового registry: `web/src/lib/registry-new/{types,index,*}.ts`
 > (по файлу на категорию: geometry/alpha/convert/analyze/filters/color/generate)
@@ -355,8 +356,12 @@ Typed field builders + `Field<T>` + `toolSchema<P>()` + `ToolSchema<P>` —
     Составной тип во всех видах: вложенный объект `pair: { from, to }` +
     `field.colorPair`, виджет `kit/fields/schema/ColorPairControl.svelte`,
     kind `color-pair` в схеме (default/sanitize). Тесты: +4 (596 passed).
-26. `offset` — пилот (circle-mask-png), затем square-mask → star-mask →
-    wavy-mask
+26. `offset` — **все 4 инструмента переведены** ✔ (`circle-mask-png`,
+    `square-mask-png`, `star-mask-png`, `wavy-mask-png` — run в
+    `registry-new/alpha.ts`). Составной тип во всех видах: вложенный объект
+    `offset: { x, y }` + `field.offset`, виджет
+    `kit/fields/schema/OffsetControl.svelte`, kind `offset` в схеме
+    (default/sanitize). Тесты: +4 (600 passed).
 27. `position9` — перевести add-text → date-stamp → watermark-image
 28. `font-style` — перевести text-to-png → add-text (если ещё не) →
     date-stamp
diff --git a/web/src/lib/components/kit/SchemaFields.svelte b/web/src/lib/components/kit/SchemaFields.svelte
index 64370ec..0fe865d 100644
--- a/web/src/lib/components/kit/SchemaFields.svelte
+++ b/web/src/lib/components/kit/SchemaFields.svelte
@@ -13,6 +13,7 @@
 	import RangeControl from "./fields/schema/RangeControl.svelte";
 	import SelectControl from "./fields/schema/SelectControl.svelte";
 	import TextControl from "./fields/schema/TextControl.svelte";
+	import OffsetControl from "./fields/schema/OffsetControl.svelte";
 
 	interface FieldControlProps {
 		label: string;
@@ -30,6 +31,7 @@
 		checkbox: CheckboxControl,
 		text: TextControl,
 		dimension: DimensionField,
+		offset: OffsetControl,
 	};
 
 	interface Props {
diff --git a/web/src/lib/components/kit/fields/schema/OffsetControl.svelte b/web/src/lib/components/kit/fields/schema/OffsetControl.svelte
new file mode 100644
index 0000000..765c46d
--- /dev/null
+++ b/web/src/lib/components/kit/fields/schema/OffsetControl.svelte
@@ -0,0 +1,87 @@
+<script lang="ts">
+	import type { FieldSpec, Offset, OffsetSpec } from "$lib/registry-schema";
+
+	interface Props {
+		label: string;
+		value: unknown;
+		spec: FieldSpec;
+		onchange?: (value: Offset) => void;
+	}
+	let { label, value, spec, onchange }: Props = $props();
+
+	const sp = $derived(spec as OffsetSpec);
+	const current = $derived.by(() => {
+		const v = value as Partial<Offset> | undefined;
+		return {
+			x: typeof v?.x === "number" && Number.isFinite(v.x) ? v.x : sp.x,
+			y: typeof v?.y === "number" && Number.isFinite(v.y) ? v.y : sp.y,
+		};
+	});
+
+	function setAxis(axis: "x" | "y", n: number) {
+		onchange?.({ ...current, [axis]: n });
+	}
+</script>
+
+<div class="control offset-control">
+	<span class="offset-label">{label}</span>
+	<div class="offset-field">
+		<label class="offset-axis">
+			<span>X</span>
+			<input
+				type="number"
+				min={sp.min}
+				max={sp.max}
+				value={current.x}
+				oninput={(e) =>
+					setAxis("x", Number((e.target as HTMLInputElement).value))}
+			/>
+		</label>
+		<label class="offset-axis">
+			<span>Y</span>
+			<input
+				type="number"
+				min={sp.min}
+				max={sp.max}
+				value={current.y}
+				oninput={(e) =>
+					setAxis("y", Number((e.target as HTMLInputElement).value))}
+			/>
+		</label>
+	</div>
+</div>
+
+<style>
+	.control {
+		display: grid;
+		gap: var(--space-m);
+		margin-bottom: var(--space-xl);
+		color: var(--color-text-muted);
+		font: var(--font-size-s) var(--font-mono);
+		letter-spacing: var(--space-text-m);
+	}
+	.offset-label {
+		color: var(--color-text);
+		font-size: var(--font-size-s);
+		letter-spacing: var(--space-text-l);
+		text-transform: uppercase;
+	}
+	.offset-field {
+		display: grid;
+		grid-template-columns: 1fr 1fr;
+		gap: var(--space-m);
+	}
+	.offset-axis > span {
+		display: block;
+		margin-bottom: var(--space-m);
+	}
+	.offset-axis input {
+		width: 100%;
+		padding: var(--space-m) var(--space-l);
+		background: var(--color-background);
+		border: var(--size-border) solid var(--color-border);
+		border-radius: var(--radius-s);
+		color: var(--color-text);
+		font: var(--font-size-s) var(--font-mono);
+	}
+</style>
diff --git a/web/src/lib/registry-new/alpha.ts b/web/src/lib/registry-new/alpha.ts
index ebc9b79..650c312 100644
--- a/web/src/lib/registry-new/alpha.ts
+++ b/web/src/lib/registry-new/alpha.ts
@@ -1,7 +1,15 @@
 import type { ToolEntry } from "./types";
 import { field, toolSchema } from "../registry-schema";
+import type { Offset } from "../registry-schema";
 import { colorMask, removeColorToAlpha } from "../core/alpha";
 import { contourImage, strokeImage } from "../core/morphology";
+import {
+	boxTest,
+	circleTest,
+	renderShape,
+	starTest,
+	wavyTest,
+} from "../core/shapes";
 
 interface AddStrokeParams {
 	color: string;
@@ -64,4 +72,130 @@ const removeColor: ToolEntry<RemoveColorParams> = {
 	preview: (img, p) => colorMask(img, p.targetColor, p.tolerance),
 };
 
-export const alphaEntries = [addStroke, findContour, removeColor];
+interface CircleMaskParams {
+	size: number;
+	offset: Offset;
+}
+
+const circleMaskSchema = toolSchema<CircleMaskParams>({
+	size: field.slider({ min: 20, max: 100, step: 1, default: 100 }),
+	offset: field.offset({ min: -50, max: 50, x: 0, y: 0 }),
+});
+
+const circleMask: ToolEntry<CircleMaskParams> = {
+	id: "circle-mask-png",
+	title: "Circle Mask PNG",
+	description:
+		"Cuts the image into a circle. Diameter is set as a share of the smaller side.",
+	category: "alpha",
+	schema: circleMaskSchema,
+	run: (img, p) =>
+		renderShape(
+			img,
+			circleTest(p.size / 200),
+			p.offset.x / 100,
+			p.offset.y / 100,
+		),
+};
+
+interface SquareMaskParams {
+	widthPct: number;
+	heightPct: number;
+	offset: Offset;
+}
+
+const squareMaskSchema = toolSchema<SquareMaskParams>({
+	widthPct: field.slider({ min: 10, max: 100, step: 1, default: 100 }),
+	heightPct: field.slider({ min: 10, max: 100, step: 1, default: 100 }),
+	offset: field.offset({ min: -50, max: 50, x: 0, y: 0 }),
+});
+
+const squareMask: ToolEntry<SquareMaskParams> = {
+	id: "square-mask-png",
+	title: "Square Mask PNG",
+	description:
+		"Cuts the image into a rectangle with sides as a share of the smaller side.",
+	category: "alpha",
+	schema: squareMaskSchema,
+	run: (img, p) =>
+		renderShape(
+			img,
+			boxTest(p.widthPct / 200, p.heightPct / 200),
+			p.offset.x / 100,
+			p.offset.y / 100,
+		),
+};
+
+interface StarMaskParams {
+	points: number;
+	innerRadius: number;
+	size: number;
+	rotation: number;
+	offset: Offset;
+}
+
+const starMaskSchema = toolSchema<StarMaskParams>({
+	points: field.slider({ min: 3, max: 12, step: 1, default: 5 }),
+	innerRadius: field.slider({ min: 10, max: 90, step: 1, default: 45 }),
+	size: field.slider({ min: 20, max: 100, step: 1, default: 100 }),
+	rotation: field.slider({ min: -180, max: 180, step: 1, default: 0 }),
+	offset: field.offset({ min: -50, max: 50, x: 0, y: 0 }),
+});
+
+const starMask: ToolEntry<StarMaskParams> = {
+	id: "star-mask-png",
+	title: "Star Mask PNG",
+	description:
+		"Cuts the image into an n-pointed star with adjustable inner radius and rotation.",
+	category: "alpha",
+	schema: starMaskSchema,
+	run: (img, p) =>
+		renderShape(
+			img,
+			starTest(p.points, p.innerRadius / 100, p.size / 200, p.rotation),
+			p.offset.x / 100,
+			p.offset.y / 100,
+		),
+};
+
+interface WavyMaskParams {
+	size: number;
+	amplitude: number;
+	waves: number;
+	phase: number;
+	offset: Offset;
+}
+
+const wavyMaskSchema = toolSchema<WavyMaskParams>({
+	size: field.slider({ min: 20, max: 100, step: 1, default: 90 }),
+	amplitude: field.slider({ min: 2, max: 30, step: 1, default: 8 }),
+	waves: field.slider({ min: 3, max: 24, step: 1, default: 8 }),
+	phase: field.slider({ min: 0, max: 360, step: 1, default: 0 }),
+	offset: field.offset({ min: -50, max: 50, x: 0, y: 0 }),
+});
+
+const wavyMask: ToolEntry<WavyMaskParams> = {
+	id: "wavy-mask-png",
+	title: "Wavy Mask PNG",
+	description:
+		"Cuts the image into a wavy-edged circle: radius is modulated by a sine with chosen amplitude and frequency.",
+	category: "alpha",
+	schema: wavyMaskSchema,
+	run: (img, p) =>
+		renderShape(
+			img,
+			wavyTest(p.size / 200, p.amplitude / 200, p.waves, p.phase),
+			p.offset.x / 100,
+			p.offset.y / 100,
+		),
+};
+
+export const alphaEntries = [
+	addStroke,
+	findContour,
+	removeColor,
+	circleMask,
+	squareMask,
+	starMask,
+	wavyMask,
+];
diff --git a/web/src/lib/registry-new/registry-new.test.ts b/web/src/lib/registry-new/registry-new.test.ts
index 7f6bc4e..e58d29d 100644
--- a/web/src/lib/registry-new/registry-new.test.ts
+++ b/web/src/lib/registry-new/registry-new.test.ts
@@ -244,6 +244,66 @@ describe("registry-new (переведённые инструменты)", () =>
 		expect(s.pair).toEqual({ from: "#ffffff", to: "#00ff00" });
 		expect(s.threshold).toBe(100);
 	});
+
+	it("circle-mask: срезает углы и сохраняет центр", async () => {
+		const tool = TOOLS.find((t) => t.id === "circle-mask-png")!;
+		const img = await tool.run!(
+			solid(100, 100),
+			sanitizeSchemaParams(tool.schema, {
+				size: 100,
+				offset: { x: 0, y: 0 },
+			}),
+		);
+		// Внешний угол (0,0) — вне круга радиуса 50 → прозрачен
+		expect(img.data[3]).toBe(0);
+		// Центр (50,50) — внутри
+		expect(img.data[(50 * img.width + 50) * 4 + 3]).toBe(255);
+	});
+
+	it("circle-mask: offset сдвигает фигуру", async () => {
+		const tool = TOOLS.find((t) => t.id === "circle-mask-png")!;
+		const img = await tool.run!(
+			solid(100, 100),
+			sanitizeSchemaParams(tool.schema, {
+				size: 50,
+				offset: { x: 50, y: 0 },
+			}),
+		);
+		// Радиус 25, центр смещён к x=100; пиксель (75,50) внутри, (49,50) снаружи
+		expect(img.data[(50 * img.width + 75) * 4 + 3]).toBe(255);
+		expect(img.data[(50 * img.width + 49) * 4 + 3]).toBe(0);
+	});
+
+	it("star-mask: сохраняет центр, режет углы", async () => {
+		const tool = TOOLS.find((t) => t.id === "star-mask-png")!;
+		const img = await tool.run!(
+			solid(100, 100),
+			sanitizeSchemaParams(tool.schema, {
+				points: 5,
+				innerRadius: 45,
+				size: 100,
+				rotation: 0,
+				offset: { x: 0, y: 0 },
+			}),
+		);
+		expect(img.data[(50 * img.width + 50) * 4 + 3]).toBe(255);
+		expect(img.data[3]).toBe(0);
+	});
+
+	it("sanitize клампит offset к min/max и чинит мусор", () => {
+		const tool = TOOLS.find((t) => t.id === "wavy-mask-png")!;
+		const s = sanitizeSchemaParams(tool.schema, {
+			size: 90,
+			amplitude: 8,
+			waves: 8,
+			phase: 0,
+			offset: { x: 999, y: "abc", extra: true } as unknown as Record<
+				string,
+				unknown
+			>,
+		});
+		expect(s.offset).toEqual({ x: 50, y: 0 });
+	});
 });
 
 function solid(width: number, height: number) {
diff --git a/web/src/lib/registry-schema.ts b/web/src/lib/registry-schema.ts
index e079faf..b012749 100644
--- a/web/src/lib/registry-schema.ts
+++ b/web/src/lib/registry-schema.ts
@@ -76,6 +76,21 @@ export interface ColorPairSpec {
 	to: string;
 }
 
+/** Смещение фигуры/объекта по центру: x + y в процентах. */
+export interface Offset {
+	x: number;
+	y: number;
+}
+
+export interface OffsetSpec {
+	kind: "offset";
+	/** Общий диапазон для обеих осей (в процентах). */
+	min: number;
+	max: number;
+	x: number;
+	y: number;
+}
+
 /**
  * «Объект as const» kind → спека поля. Единственный источник правды для
  * перечня kinds: `FieldSpecKind` = ключи map, `FieldSpec` = значение по любому
@@ -91,6 +106,7 @@ export const fieldSpecs = {
 	checkbox: {} as CheckboxSpec,
 	dimension: {} as DimensionSpec,
 	"color-pair": {} as ColorPairSpec,
+	offset: {} as OffsetSpec,
 } as const;
 
 export type FieldSpecKind = keyof typeof fieldSpecs;
@@ -147,6 +163,14 @@ export const field = {
 	colorPair: (s: { from: string; to: string }): Field<ColorPair> => ({
 		spec: { kind: "color-pair", ...s },
 	}),
+	offset: (s: {
+		min: number;
+		max: number;
+		x: number;
+		y: number;
+	}): Field<Offset> => ({
+		spec: { kind: "offset", ...s },
+	}),
 };
 
 /**
@@ -177,6 +201,8 @@ export function defaultSchemaParams<P>(
 			out[key] = { width: spec.width, height: spec.height };
 		} else if (spec.kind === "color-pair") {
 			out[key] = { from: spec.from, to: spec.to };
+		} else if (spec.kind === "offset") {
+			out[key] = { x: spec.x, y: spec.y };
 		} else {
 			out[key] = spec.default;
 		}
@@ -260,6 +286,21 @@ export function sanitizeSchemaParams<P>(
 				out[key] = { from, to };
 				break;
 			}
+			case "offset": {
+				const r =
+					typeof raw === "object" && raw !== null && "x" in raw && "y" in raw
+						? (raw as Record<string, unknown>)
+						: undefined;
+				const x =
+					typeof r?.x === "number" && Number.isFinite(r.x) ? r.x : spec.x;
+				const y =
+					typeof r?.y === "number" && Number.isFinite(r.y) ? r.y : spec.y;
+				out[key] = {
+					x: clamp(x, spec.min, spec.max),
+					y: clamp(y, spec.min, spec.max),
+				};
+				break;
+			}
 		}
 	}
 	return out;