a1-migration

name	a1-migration
description	Migrate an Angular application to the One Allianz (A1) Design System. Use when: migrating to A1 design system, applying One Allianz theme, migrating circle toggles to tiles, updating small stages, updating layout to left-alignment, A1 brand kit, ngx-brand-kit, ng-aquila migration, NDBX to A1.
argument-hint	Theme (optional): spacious | compact | dense
metadata	{"version":"0.1.4"}

A1 Design System Migration

When to Use

• Migrating an Angular app from NDBX/old design system to One Allianz (A1) Design System
• Applying One Allianz theme (spacious, compact, or dense)
• Replacing nx-circle-toggle / nx-circle-toggle-group with nx-tile / nx-tile-group
• Replacing info buttons with popovers to use the new NxInfoIconComponent
• Updating layout from center-aligned to left-aligned (A1 standard)
• Adjusting nx-small-stage components, eyebrows and accent-color headlines

How to Apply Changes

• if css is required, add to the component's CSS file. If the component is standalone, add the CSS to the component's styles array in the @Component decorator.
• write style definitions into components style file. Do not use inline styles in the HTML template.

---

IMPORTANT: Before starting, tell the user the skill version "0.1.4" and that it's in beta phase. This is important for tracking and future updates.

Step 1: Apply A1 Theme

Important: check if package @allianz/ngx-brand-kit is installed.

• if not installed, do not try to install, do not ask the user to install and skip this step and continue with Step 2.
• if installed, continue with the Procedure as described below.

Procedure

1. If theme is not specified, ask the user which theme they want: spacious, compact, or dense.

• spacious for end customer-facing apps with more white space and larger touch targets
• compact for internal tools and dashboards where more information density is needed
• dense for data-heavy applications where maximum information density is required (e.g. tables, analytics)

2. Run the schematic from the project root (where angular.json lives):

   ng g @allianz/ngx-brand-kit:apply-a1-theme --type=<THEME>
   

---

Step 2: Migrate Circle Toggles → Tiles

Stack: Angular standalone components, TypeScript, @allianz/ng-aquila

Imports

import { NxTileComponent, NxTileGroupComponent } from '@allianz/ng-aquila/tile';

If used in a Standalone Component, add the NxTileComponent, NxTileGroupComponent to the components imports array.

Decision Rules

Scenario	Action
nx-circle-toggle not in a group	Multi-select → use nx-tile-group [value]="arrayOfValues"
nx-circle-toggle inside nx-circle-toggle-group	Single-select → use nx-tile-group [value]="selectedValue"
circleText attribute present	Remove it; add <!-- TODO: revisit once toggle-button component is available -->

Selection / Forms Pattern

Before (checked-based):

<nx-circle-toggle-group>
  <nx-circle-toggle
    [checked]="sel==='a'"
    value="a"
    label="Label A"
    icon="icon-name"
  ></nx-circle-toggle>
  <nx-circle-toggle
    [checked]="sel==='b'"
    value="b"
    label="Label B"
    icon="icon-name"
  ></nx-circle-toggle>
</nx-circle-toggle-group>

After (value-based on group):

<nx-tile-group [value]="sel">
  <nx-tile value="a" label="Label A" icon="icon-name"></nx-tile>
  <nx-tile value="b" label="Label B" icon="icon-name"></nx-tile>
</nx-tile-group>

IMPORTANT: Do NOT put content inside <nx-tile>. Use only label, value, and icon attributes.

Layout Rules

Layout found	What to do
No wrapper, no layout CSS	Replace group directly; no extra layout needed
nxLayout / nxRow / nxCol grid	Derive maxColumns from lowest nxCol number: 12 ÷ lowest = maxColumns. Remove grid wrapper.
Custom CSS	Translate to [maxColumns] on nx-tile-group; copy CSS only if auto-grid is insufficient
2–3 tiles total	Wrap nx-tile-group in nxCol="12,12,6" (half-width)

For each occurrence found, output a short decision log: what was there, what you chose and why.

---

Step 3: Migrate Info Popups → new Info Icon Component

1. Identify info buttons with popups: look for buttons (e.g. buttons with directive nxPopoverTrigger) that trigger popovers and just have an info icon inside.
2. Replace with NxInfoIconComponent: use the new component for consistent styling and behavior.
3. Example:

<nx-info-icon
  nxFormfieldAppendix
  buttonAriaLabel="Additional information"
  popoverDirection="bottom"
  popoverWidth="300px"
>
  <span>
    This is an info icon with a popover. Click the icon to see additional information. Sadipscing
    elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam
    voluptua.
  </span>
</nx-info-icon>

And the corresponding import:

import { NxInfoIconComponent } from '@allianz/ng-aquila/info-icon';

If used in a Standalone Component, add the NxInfoIconComponent to the components imports array.

4. Important: Do not change buttons inside Formfields (<nx-formfield>). Only replace standalone info buttons that trigger popovers.

---

Step 4: Update Layout — Left Alignment

A1 uses left-alignment throughout for accessibility and consistency.

Checklist

1. Remove centering on rows: Change or remove rowJustify="center" → use rowJustify="start" or remove entirely.
2. Remove text centering: Remove class="text-center", style="text-align: center", and similar on headings and paragraphs.
3. Bottom navigation buttons (Back / Next):
   • Must be right-aligned (rowJustify="end")
   • Must be side-by-side (same nxRow, not stacked in separate rows)
   • Must use sentence case ("Back", "Next") not ALL CAPS
   • nxCol only accepts numbers — warning nxCol="auto" will break; use nxCol="12", nxCol="12,12,6" or similar
   • info on nxCol: breakpoints are defined as nxCol="<tiny>, <small>, <medium>, <large>, <xlarge>, <2xlarge>, <3xlarge>"
   • must be vertically centered within the row — if nxRow is used, add rowAlignItems="center".
4. Margins / padding: Remove margin: auto, horizontal centering, and ensure content aligns to the left edge.

Vertical Spacing Adjustments

• Important: Skip this step if the ngx-brand-kit is not installed and continue with Headline Sizes below. The spacing values below rely on CSS variables from the A1 brand kit, so if it's not installed, leave spacing as-is.
• Find Dividers (<hr>, nx-divider, nxCol="12" class="section-divider" or similar) divider lines that span the full width of the page and add vertical spacing above and below them. Use var(--semantic-gap-all-static-1600) for this spacing to ensure consistency with A1 design standards.
• Headlines that are used standalone (outside of other components) should have a spacing below them. Use the mapping below
  • nxHeadline size="3xl" → var(--semantic-gap-all-static-1200)
  • nxHeadline size="2xl" → var(--semantic-gap-all-static-1000)
  • nxHeadline size="xl" → var(--semantic-gap-all-static-800)
• If the element underneath the headline has a top spacing (e.g. margin-top or padding-top), remove it to avoid double spacing or subtract the headline spacing from it.

Headline Sizes

Hierarchy rule — applies after the mapping table and overrides it where needed: The mapping table below is a starting point, not a final answer. After applying it, verify that the resulting sizes form a clear visual hierarchy on the page. If a primary section heading (e.g. an <h2> that is the main title of a page section) maps to a small size like s or m, override the mapped value to restore the hierarchy. A page with an h1 at size="3xl" should use size="2xl" for its primary h2 sections, size="xl" for sub-sections, and so on — regardless of what the old assignment was.

• if you find nxHeadline with type assignments (e.g. <h1 nxHeadline="page"> ), translate to size attribute. For example, <h1 nxHeadline="page"> becomes <h1 nxHeadline size="3xl">. Ensure the main headline in nx-small-stage uses size="3xl" for A1 consistency.

old assignment	size attribute	use for
nxHeadline="page-bold-caps"	nxHeadline size="4xl"	huge page headlines, only for marketing pages, not for product UIs
nxHeadline="page"	nxHeadline size="3xl"	main page headlines
nxHeadline="section"	nxHeadline size="2xl"	section headlines
nxHeadline="subsection-large"	nxHeadline size="xl"	large subsection headlines
nxHeadline="subsection-medium"	nxHeadline size="l"	medium subsection headlines
nxHeadline="subsection-small"	nxHeadline size="m"	small subsection headlines
nxHeadline="subsection-xsmall"	nxHeadline size="s"	extra small subsection headlines

After applying the table, check: does the result make sense in context? A primary <h2> section heading should never end up at size="s" just because the old code used subsection-xsmall. Promote it to the correct level in the page hierarchy.

---

Step 5: Adjust Small Stages

5.1 Subline → Eyebrow

Move any <p nxCopytext="large">Subline</p> inside nx-small-stage to an eyebrow above the <h1>:

<nx-eyebrow size="s">Subline Text</nx-eyebrow>
<h1 nxHeadline size="3xl">...</h1>

Use the size="s" eyebrow size for nxHeadline size 3xl and smaller. If the user wants a nxHeadline larger than 3xl, use size="m" for the eyebrow.

import { NxEyebrowComponent } from '@allianz/ng-aquila/eyebrow';

If used in a Standalone Component, add the NxEyebrowComponent to the components imports array.

5.2 Partial Headline Coloring (required)

Always wrap the most meaningful word or short phrase in the <h1> with an accent-color span. This is a required A1 design standard for nx-small-stage headlines — do not skip it. Choose the word or phrase that carries the most semantic weight (the product, the action, or the subject — not filler words like "your" or "and").

<h1 nxHeadline size="3xl">Enter your <span [nx-accent-color]="'aqua'">property details</span></h1>

import { NxAccentColorComponent } from '@allianz/ng-aquila/text';

If used in a Standalone Component, add the NxAccentColorComponent to the components imports array.

5.3 Headline Size

• remove assignments to nxHeadline in HTML headline elements (e.g. <h1 nxHeadline="page">) and replace with <h1 nxHeadline size="3xl"> for all small stage headlines. Ensure the main headline in nx-small-stage uses size="3xl" for A1 consistency.

---

Step 6: Migrate Context Menu Selection

nxContextMenuItem now has built-in single/multi selection. Hand-rolled patterns that combine selectable, a <nx-icon name="check">, an explicit role="menuitemradio|menuitemcheckbox" and [attr.aria-checked] should be migrated to the new API.

Detection

Look for nxContextMenuItem usages that match any of these signals:

• selectable (bare attribute) plus a manual <nx-icon name="check"> rendered conditionally on the selected value.
• role="menuitemradio" or role="menuitemcheckbox" set by hand on a menu item.
• [attr.aria-checked] bound by hand on a menu item.

Replacement

Before:

<button
  nxContextMenuItem
  selectable
  type="button"
  (click)="selectedLanguage = o.value"
  role="menuitemradio"
  [attr.aria-checked]="selectedLanguage === o.value ? 'true' : 'false'"
>
  @if (selectedLanguage === o.value) {
    <nx-icon aria-hidden="true" name="check" nxIconPositionStart></nx-icon>
  }
  {{ o.label }}
</button>

After:

<button
  nxContextMenuItem
  selectable="single"
  [selected]="selectedLanguage === o.value"
  type="button"
  (click)="selectedLanguage = o.value"
>
  {{ o.label }}
</button>

For multi-select menus use selectable="multi" and keep disableCloseOnSelect if the menu should stay open between toggles. Drop any manual <nx-icon name="check">, role, and [attr.aria-checked] bindings — the component renders the indicator and sets the role for you.

Notes

• Legacy selectable without a value still works and is treated as "true". but this is a legacy behavior. This is a behavior change vs. older versions where the bare attribute only adjusted padding; templates relying on the old purely-stylistic behavior should set [selectable]="null" (or remove the attribute) if they don't want a radio role.
• After applying this step, append "context-menu-selection" to the a1Migration.steps array in package.json.

---

Migration Tracking

After completing each step, record the migration so adoption can be tracked across teams via GitHub search.

Project-level metadata in package.json

After Step 1 (theme applied), add an a1Migration key to package.json. After each subsequent step completes, append the step name to the steps array:

"a1Migration": {
  "skillVersion": "0.1.4",
  "appliedAt": "YYYY-MM-DD",
  "theme": "<spacious|compact|dense>",
  "steps": ["theme"]
}

Append step names as they complete: "theme", "tiles", "info-icons", "layout", "small-stage", "context-menu-selection".

A fully migrated project looks like:

"a1Migration": {
  "skillVersion": "0.1.4",
  "appliedAt": "YYYY-MM-DD",
  "theme": "<spacious|compact|dense>",
  "steps": ["theme", "tiles", "info-icons", "layout", "small-stage"]
}

tracking of additional migration runs

If package.json already has an a1Migration key, add the steps to the array for steps that ran in the current session.