diff --git a/packages/core/src/components/text-field/index.ts b/packages/core/src/components/text-field/index.ts
new file mode 100644
index 0000000..341cb8c
--- /dev/null
+++ b/packages/core/src/components/text-field/index.ts
@@ -0,0 +1,22 @@
+// packages/core/src/components/text-field/index.ts
+import { useTextFieldContext } from "./text-field-context";
+import { TextFieldDescription } from "./text-field-description";
+import { TextFieldErrorMessage } from "./text-field-error-message";
+import { TextFieldInput } from "./text-field-input";
+import { TextFieldLabel } from "./text-field-label";
+import { TextFieldRoot } from "./text-field-root";
+
+export const TextField = Object.assign(TextFieldRoot, {
+  Label: TextFieldLabel,
+  Input: TextFieldInput,
+  Description: TextFieldDescription,
+  ErrorMessage: TextFieldErrorMessage,
+  useContext: useTextFieldContext,
+});
+
+export type { TextFieldRootProps } from "./text-field-root";
+export type { TextFieldLabelProps } from "./text-field-label";
+export type { TextFieldInputProps } from "./text-field-input";
+export type { TextFieldDescriptionProps } from "./text-field-description";
+export type { TextFieldErrorMessageProps } from "./text-field-error-message";
+export type { TextFieldContextValue } from "./text-field-context";
diff --git a/packages/core/src/components/text-field/text-field-context.ts b/packages/core/src/components/text-field/text-field-context.ts
new file mode 100644
index 0000000..cf3dd82
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-context.ts
@@ -0,0 +1,32 @@
+// packages/core/src/components/text-field/text-field-context.ts
+import type { Accessor } from "solid-js";
+import { createContext, useContext } from "solid-js";
+
+export interface TextFieldContextValue {
+  inputId: Accessor<string>;
+  descriptionId: Accessor<string | undefined>;
+  errorMessageId: Accessor<string | undefined>;
+  invalid: Accessor<boolean>;
+  disabled: Accessor<boolean>;
+  required: Accessor<boolean>;
+  setDescriptionId: (id: string | undefined) => void;
+  setErrorMessageId: (id: string | undefined) => void;
+}
+
+const TextFieldContext = createContext<TextFieldContextValue>();
+
+/**
+ * Returns the TextField context. Throws if used outside <TextField>.
+ */
+export function useTextFieldContext(): TextFieldContextValue {
+  const ctx = useContext(TextFieldContext);
+  if (!ctx) {
+    throw new Error(
+      "[PettyUI] TextField parts must be used inside <TextField>.\n" +
+        "  Fix: Wrap TextField.Label, TextField.Input, etc. inside <TextField>.",
+    );
+  }
+  return ctx;
+}
+
+export const TextFieldContextProvider = TextFieldContext.Provider;
diff --git a/packages/core/src/components/text-field/text-field-description.tsx b/packages/core/src/components/text-field/text-field-description.tsx
new file mode 100644
index 0000000..5308a9b
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-description.tsx
@@ -0,0 +1,22 @@
+// packages/core/src/components/text-field/text-field-description.tsx
+import type { JSX } from "solid-js";
+import { createUniqueId, onCleanup, onMount, splitProps } from "solid-js";
+import { useTextFieldContext } from "./text-field-context";
+
+export interface TextFieldDescriptionProps extends JSX.HTMLAttributes<HTMLParagraphElement> {
+  children?: JSX.Element;
+}
+
+/** Helper text for the TextField. Linked via aria-describedby. */
+export function TextFieldDescription(props: TextFieldDescriptionProps): JSX.Element {
+  const [local, rest] = splitProps(props, ["children"]);
+  const ctx = useTextFieldContext();
+  const id = createUniqueId();
+  onMount(() => ctx.setDescriptionId(id));
+  onCleanup(() => ctx.setDescriptionId(undefined));
+  return (
+    <p id={id} {...rest}>
+      {local.children}
+    </p>
+  );
+}
diff --git a/packages/core/src/components/text-field/text-field-error-message.tsx b/packages/core/src/components/text-field/text-field-error-message.tsx
new file mode 100644
index 0000000..de30b31
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-error-message.tsx
@@ -0,0 +1,24 @@
+// packages/core/src/components/text-field/text-field-error-message.tsx
+import type { JSX } from "solid-js";
+import { Show, createUniqueId, onCleanup, onMount, splitProps } from "solid-js";
+import { useTextFieldContext } from "./text-field-context";
+
+export interface TextFieldErrorMessageProps extends JSX.HTMLAttributes<HTMLParagraphElement> {
+  children?: JSX.Element;
+}
+
+/** Error message shown when the field is invalid. Announced via aria-live. */
+export function TextFieldErrorMessage(props: TextFieldErrorMessageProps): JSX.Element {
+  const [local, rest] = splitProps(props, ["children"]);
+  const ctx = useTextFieldContext();
+  const id = createUniqueId();
+  onMount(() => ctx.setErrorMessageId(id));
+  onCleanup(() => ctx.setErrorMessageId(undefined));
+  return (
+    <Show when={ctx.invalid()}>
+      <p id={id} aria-live="polite" {...rest}>
+        {local.children}
+      </p>
+    </Show>
+  );
+}
diff --git a/packages/core/src/components/text-field/text-field-input.tsx b/packages/core/src/components/text-field/text-field-input.tsx
new file mode 100644
index 0000000..8e6f257
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-input.tsx
@@ -0,0 +1,23 @@
+// packages/core/src/components/text-field/text-field-input.tsx
+import type { JSX } from "solid-js";
+import { splitProps } from "solid-js";
+import { useTextFieldContext } from "./text-field-context";
+
+export type TextFieldInputProps = JSX.InputHTMLAttributes<HTMLInputElement>;
+
+/** The input element. Automatically wired to Label, Description, and ErrorMessage. */
+export function TextFieldInput(props: TextFieldInputProps): JSX.Element {
+  const [local, rest] = splitProps(props, ["id", "aria-describedby"]);
+  const ctx = useTextFieldContext();
+  return (
+    <input
+      id={local.id ?? ctx.inputId()}
+      aria-describedby={local["aria-describedby"] ?? ctx.descriptionId()}
+      aria-errormessage={ctx.invalid() ? ctx.errorMessageId() : undefined}
+      aria-invalid={ctx.invalid() || undefined}
+      aria-required={ctx.required() || undefined}
+      disabled={ctx.disabled()}
+      {...rest}
+    />
+  );
+}
diff --git a/packages/core/src/components/text-field/text-field-label.tsx b/packages/core/src/components/text-field/text-field-label.tsx
new file mode 100644
index 0000000..518773a
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-label.tsx
@@ -0,0 +1,24 @@
+// packages/core/src/components/text-field/text-field-label.tsx
+import type { JSX } from "solid-js";
+import { splitProps } from "solid-js";
+import { useTextFieldContext } from "./text-field-context";
+
+export interface TextFieldLabelProps extends JSX.HTMLAttributes<HTMLLabelElement> {
+  children?: JSX.Element;
+}
+
+/** Label element linked to the TextField input via htmlFor. */
+export function TextFieldLabel(props: TextFieldLabelProps): JSX.Element {
+  const [local, rest] = splitProps(props, ["children"]);
+  const ctx = useTextFieldContext();
+  return (
+    <label
+      for={ctx.inputId()}
+      data-invalid={ctx.invalid() || undefined}
+      data-disabled={ctx.disabled() || undefined}
+      {...rest}
+    >
+      {local.children}
+    </label>
+  );
+}
diff --git a/packages/core/src/components/text-field/text-field-root.tsx b/packages/core/src/components/text-field/text-field-root.tsx
new file mode 100644
index 0000000..1f352f1
--- /dev/null
+++ b/packages/core/src/components/text-field/text-field-root.tsx
@@ -0,0 +1,45 @@
+// packages/core/src/components/text-field/text-field-root.tsx
+import type { JSX } from "solid-js";
+import { createUniqueId, splitProps } from "solid-js";
+import { createRegisterId } from "../../primitives/create-register-id";
+import { TextFieldContextProvider, type TextFieldContextValue } from "./text-field-context";
+
+export interface TextFieldRootProps extends JSX.HTMLAttributes<HTMLDivElement> {
+  disabled?: boolean;
+  invalid?: boolean;
+  required?: boolean;
+  children: JSX.Element;
+}
+
+/**
+ * Root container for TextField. Provides context to all TextField parts.
+ */
+export function TextFieldRoot(props: TextFieldRootProps): JSX.Element {
+  const [local, rest] = splitProps(props, ["disabled", "invalid", "required", "children"]);
+  const inputId = createUniqueId();
+  const [descriptionId, setDescriptionId] = createRegisterId();
+  const [errorMessageId, setErrorMessageId] = createRegisterId();
+
+  const ctx: TextFieldContextValue = {
+    inputId: () => inputId,
+    descriptionId,
+    errorMessageId,
+    invalid: () => local.invalid ?? false,
+    disabled: () => local.disabled ?? false,
+    required: () => local.required ?? false,
+    setDescriptionId,
+    setErrorMessageId,
+  };
+
+  return (
+    <TextFieldContextProvider value={ctx}>
+      <div
+        data-invalid={local.invalid || undefined}
+        data-disabled={local.disabled || undefined}
+        {...rest}
+      >
+        {local.children}
+      </div>
+    </TextFieldContextProvider>
+  );
+}
diff --git a/packages/core/tests/components/text-field/text-field.test.tsx b/packages/core/tests/components/text-field/text-field.test.tsx
new file mode 100644
index 0000000..ba3721f
--- /dev/null
+++ b/packages/core/tests/components/text-field/text-field.test.tsx
@@ -0,0 +1,78 @@
+// packages/core/tests/components/text-field/text-field.test.tsx
+import { render, screen } from "@solidjs/testing-library";
+import { describe, expect, it } from "vitest";
+import { TextField } from "../../../src/components/text-field/index";
+
+describe("TextField", () => {
+  it("label is linked to input via htmlFor/id", () => {
+    render(() => (
+      <TextField>
+        <TextField.Label>Name</TextField.Label>
+        <TextField.Input />
+      </TextField>
+    ));
+    const label = screen.getByText("Name");
+    const input = screen.getByRole("textbox");
+    expect(label.getAttribute("for")).toBe(input.id);
+  });
+
+  it("description is linked via aria-describedby", () => {
+    render(() => (
+      <TextField>
+        <TextField.Label>Name</TextField.Label>
+        <TextField.Input />
+        <TextField.Description>Enter your full name</TextField.Description>
+      </TextField>
+    ));
+    const input = screen.getByRole("textbox");
+    const desc = screen.getByText("Enter your full name");
+    expect(input.getAttribute("aria-describedby")).toBe(desc.id);
+  });
+
+  it("error message not shown when not invalid", () => {
+    render(() => (
+      <TextField>
+        <TextField.Input />
+        <TextField.ErrorMessage>Required</TextField.ErrorMessage>
+      </TextField>
+    ));
+    expect(screen.queryByText("Required")).toBeNull();
+  });
+
+  it("error message shown when invalid=true", () => {
+    render(() => (
+      <TextField invalid>
+        <TextField.Input />
+        <TextField.ErrorMessage>Required</TextField.ErrorMessage>
+      </TextField>
+    ));
+    expect(screen.getByText("Required")).toBeTruthy();
+  });
+
+  it("input has aria-invalid when invalid=true", () => {
+    render(() => (
+      <TextField invalid>
+        <TextField.Input />
+      </TextField>
+    ));
+    expect(screen.getByRole("textbox").getAttribute("aria-invalid")).toBe("true");
+  });
+
+  it("input is disabled when disabled=true", () => {
+    render(() => (
+      <TextField disabled>
+        <TextField.Input />
+      </TextField>
+    ));
+    expect(screen.getByRole("textbox")).toBeDisabled();
+  });
+
+  it("input has aria-required when required=true", () => {
+    render(() => (
+      <TextField required>
+        <TextField.Input />
+      </TextField>
+    ));
+    expect(screen.getByRole("textbox").getAttribute("aria-required")).toBe("true");
+  });
+});