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wappler 4f0ef67f4d Add t3bootstrap-site-settings skill (v0.2.0)

Catalog of the ~200+ typed Site Settings shipped by t3bootstrap/template
(Configuration/Sets/Template/settings.definitions.yaml) and t3bootstrap/core
(Configuration/Sets/T3BCore/settings.definitions.yaml). Covers:

- Header (logo, layout 0-5, sticky, searchbox)
- Navigation: main/sub/mobile/language/footer/meta/breadcrumb/aria with menuType options
- Design colors (primary/secondary, dark mode via data or media-query, contrast mode)
- Design fonts (font families + h1-h6 + display1-6 sizes)
- Body / footer (background-media slide, CTA bar, footer.contentPageId)
- Meta / favicons / web manifest / theme color / referrer
- Search + indexed_search wiring
- Bootstrap tokens (breakpoints, breakpointsMax, containerWidths, gridColumns)
- Spacing scale (7-step rem system → CSS custom properties + utility classes)
- Icons (rendering svg/iconfont, defaultSize, defaultColor)
- Images (preferredImageFormat webp/avif, fullwidth handling)
- Buttons (registered classes)
- Privacy policies
- Custom setting types: ctabaritemlist, ctabuttonlist, calltoactionlist
- Add-ons: t3bootstrap-blog.listDesign, filecollection_gallery

Plus 17-recipe cookbook (brand colors, header layout, off-canvas mobile menu,
megamenu, language switcher, dark mode, custom breakpoints, custom spacing,
WebP images, indexed search, PWA manifest, felogin, social CTA bar, CTA buttons,
customer defaults) and anti-patterns (editing vendor definitions, mixing
constants and settings, structural per-language overrides).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-06-15 13:45:45 +02:00

28 KiB

Raw Blame History

name, description

name	description
t3bootstrap-site-settings	Configure a T3Bootstrap-based TYPO3 v14 project via Site Settings — the structured YAML/Backend-Editor surface that replaces TypoScript constants. Catalog of ~200+ typed settings exposed by `t3bootstrap/template`, `t3bootstrap/core`, and the major add-on sets (blog, gallery), grouped by category (header, navigation, design colors, design fonts, body, footer, meta/favicons, search, assets, breakpoints, container widths, spacing steps, icons, buttons, privacy, expert, CTA-bar with social links). Includes the YAML structure for `config/sites/<site>/settings.yaml`, the special custom setting types (`ctabaritemlist`, `ctabuttonlist`, `calltoactionlist`) that t3bootstrap ships, a cookbook of common configuration tasks, and anti-patterns. Use this skill whenever changing colors, fonts, navigation behavior, header layout, sticky behavior, mobile menu type, dark mode, breakpoints, spacing system, footer content, search wiring, favicon/manifest, social links, or any other declarative configuration in a T3Bootstrap project.

name

description

t3bootstrap-site-settings

Configure a T3Bootstrap-based TYPO3 v14 project via Site Settings — the structured YAML/Backend-Editor surface that replaces TypoScript constants. Catalog of ~200+ typed settings exposed by `t3bootstrap/template`, `t3bootstrap/core`, and the major add-on sets (blog, gallery), grouped by category (header, navigation, design colors, design fonts, body, footer, meta/favicons, search, assets, breakpoints, container widths, spacing steps, icons, buttons, privacy, expert, CTA-bar with social links). Includes the YAML structure for `config/sites/<site>/settings.yaml`, the special custom setting types (`ctabaritemlist`, `ctabuttonlist`, `calltoactionlist`) that t3bootstrap ships, a cookbook of common configuration tasks, and anti-patterns. Use this skill whenever changing colors, fonts, navigation behavior, header layout, sticky behavior, mobile menu type, dark mode, breakpoints, spacing system, footer content, search wiring, favicon/manifest, social links, or any other declarative configuration in a T3Bootstrap project.

T3Bootstrap Site Settings

Use this skill to configure a T3Bootstrap-based TYPO3 v14 project via Site Settings instead of TypoScript constants. The stack ships ~200+ typed settings across two settings.definitions.yaml files (plus add-on definitions) — this catalog tells you which key controls what, where it's defined, and how to set it.

Companion skills:

t3bootstrap-site-package — get the right sets into the site config first; settings only take effect once the providing set is listed in dependencies.

t3bootstrap-overrides — when a setting doesn't expose what you need, escalate to SCSS/Fluid override.

How Settings Are Resolved (v14)

TYPO3 v14 unifies "typed Site Settings" and TypoScript constants:

Each extension's Configuration/Sets/<SetName>/settings.definitions.yaml declares typed settings with category, default value, label, optional enum.
Defaults live next to the definitions in settings.yaml (only set if non-default).
A site can override any setting in config/sites/<site>/settings.yaml.
Every typed setting is automatically also exposed as a TypoScript constant under the same dotted path — so {$header.logo} still works in TypoScript and Fluid layouts.

Three Places You Can Set a Value

Where	When to use
TYPO3 backend → Site Management → Settings	Editor / integrator works in the UI. Persisted to `config/sites/<site>/settings.yaml` automatically. Reviewable in git. ✅ Default choice.
`config/sites/<site>/settings.yaml` direct edit	When committing infrastructure config in a feature branch without going through the backend. Same file the UI writes.
Customer extension's `Configuration/Sets/Site<Customer>/settings.yaml`	Default values that should ship with the project — useful for white-label installs or "this customer always wants dark mode".

Precedence (highest wins): site settings.yaml > customer set settings.yaml > upstream set settings.yaml > definition default.

Inspecting Values

# All current effective settings for a site (claude-diagnostics)
ddev exec vendor/bin/typo3 site:settings --site=<site-id>

# A single dotted path resolved as a TypoScript constant
ddev exec vendor/bin/typo3 ts:constants --path=header.logo

Settings From `t3bootstrap/template`

vendor/t3bootstrap/template/Configuration/Sets/Template/settings.definitions.yaml — the biggest definitions file in the stack. Categories prefixed template.*.

Meta / Favicons / Manifest

Key	Type	Default	Purpose
`headercomment`	string	`T3Bootstrap Template by WapplerSystems. https://t3bootstrap.de`	HTML comment in `<head>`. Set to `''` to hide.
`meta.favicon`	string	`EXT:template/Resources/Public/Images/favicon.png`	Primary favicon path
`meta.faviconPng16` / `meta.faviconPng32`	string	`''`	PNG favicon variants
`meta.appleTouchIcon57` / `72` / `114` / `144`	string	`''`	Legacy Apple touch icons
`meta.appleTouchIcon`	string	`''`	Modern 180×180 Apple touch icon
`meta.androidIcon192` / `meta.androidIcon512`	string	`''`	Chrome/Android icons
`meta.maskIcon`	string	`''`	Safari mask SVG
`meta.maskIconColor`	string	`#000000`	Safari mask color
`meta.webmanifest`	string	`''`	Path to `site.webmanifest`
`meta.themeColor`	string	`''`	`<meta name="theme-color">`
`meta.cssClass`	string	`''`	Extra class on `<body>`
`meta.cssClassAria`	string	`''`	`<body>` class for `aria-language` modes
`meta.referrer`	enum	`same-origin`	Referrer-Policy (8 options)

The typo3-skills:typo3-favicon-manifest skill covers the full route-enhancer wiring for /site.webmanifest.

Header

Key	Type	Default	Purpose
`header.logo`	string	`EXT:template/Resources/Public/Images/logo.svgz`	Logo file path
`header.logoHighContrast`	string	`''`	High-contrast variant (loaded when contrast mode active)
`header.layout`	enum	`4`	0=Standard, 1=Logo right of nav, 2=Logo left above nav, 3=Centered, 4=Logo left next to nav full-height, 5=Logo left + nav+meta-links right
`header.searchbox`	bool	`false`	Show searchbox in header
`header.isSticky`	bool	`true`	Sticky header on scroll
`header.slogan`	string	`''`	HTML slogan text
`header.title`	string	`''`	HTML title text

Body

Key	Type	Default	Purpose
`body.backgroundMedia.slide`	bool	`false`	If page has no `background_media`, slide up the rootline for inheritance
`body.callToAction.enabled`	bool	`false`	Show floating CTA-bar (social links / contact icons)
`body.callToAction.position`	enum	`right`	`left` or `right`
`body.callToAction.class`	string	`d-none d-lg-flex`	Visibility utility classes

Footer

Key	Type	Default	Purpose
`footer.logo`	string	`EXT:template/Resources/Public/Images/logo.svgz`	Footer logo path
`footer.logoHighContrast`	string	`''`	High-contrast variant
`footer.contentPageId`	int	`0`	Page UID holding the footer content elements (typical pattern: one sysfolder for all sites)
`footer.copyright`	string	`''`	Copyright line
`footer.creditsEnabled`	bool	`true`	Show "Created with …" credits line
`footer.credits`	string	`''`	Override credits HTML
`footer.callToAction`	bool	`false`	Show CTA-bar in footer

Key	Type	Default	Purpose
`navigation.main.enabled`	bool	`true`	Show main nav
`navigation.main.entryLevel`	int	`0`	Page-tree level to start at
`navigation.main.levels`	int	`3`	How deep to render
`navigation.main.menuType`	enum	`smartmenus`	`default` / `bootstrap` / `smartmenus` / `megamenu` / `onepage` / `overlay-menu`
`navigation.main.megaMenuPid`	int	`0`	UID of the megamenu page (when `menuType: megamenu`)
`navigation.main.overlayMenuPid`	int	`0`	UID for `overlay-menu`
`navigation.main.includeSpacer`	bool	`false`	Render spacer pages
`navigation.main.showAccessProtectedPages`	bool	`false`	Show login-required pages
`navigation.main.includeNotInMenu`	bool	`false`	Show hidden-in-menu pages
`navigation.main.excludeUidList`	string	`''`	Comma-list of UIDs to skip
`navigation.main.showIcon`	bool	`true`	Render page-level icons

The same parameter shape (entryLevel, levels, enabled, excludeUidList, …) repeats for each of these. Key per-group differences:

Group	Notable keys
`navigation.sub.*`	Defaults `entryLevel: 1`, `levels: 3`, `enabled: true`. Sidebar/sub-menu rendering.
`navigation.mobile.*`	`menuType` (`mmenu` / `offcanvas` / `overlay-menu`), `useAjax` (mmenu only), `showSearchbox`, `showLanguage`, `expandSubmenus`
`navigation.language.*`	`enabled`, `hideCurrent`, `hideUnavailable`, `layout` (`Dropdown`/`Row`), `itemLayout` (`FlagAndLabel`/`Flag`/`Label`), `showInMetaNavigation`, `showAlwaysInMainNavigation`
`navigation.footer.*`	`enabled`, `folderPageId` (the page holding the footer-menu pages/shortcuts)
`navigation.meta.*`	Meta-nav with `folderPageId`, `includeSpacer`, `showIcon`, `excludeUidList`
`navigation.breadcrumb.position`	enum: `0`=none, `1`=under header, `2`=under nav
`navigation.breadcrumb.entryLevel`	int — typically `0`
`navigation.aria.*`	ARIA-bar: `enabled`, `easy-language.linkType` (`none`/`page`/`language`), `easy-language.pageId`, `easy-language.languageId`, `help.pageId`
`navigation.overlayMenuSection`	bool — let menu float over content (full-bleed hero pages)
`navigation.menu.abstract.previewImageCropVariant`	string — crop variant for abstract-menu previews

Search

Key	Type	Default	Purpose
`search.searchPageId`	int	`0`	UID of the search-results page (carries the indexed_search plugin). Required if the searchbox is shown.
`search.indexedSearch.indexingOn`	bool	`false`	Enable indexing of cached pages
`search.indexedSearch.indexExternalsOn`	bool	`false`	Index linked external files
`search.indexedSearch.indexMetaTagsOn`	bool	`false`	Index meta-tag content

Design — Layout & Color

Key	Type	Default	Purpose
`design.layout`	enum	`full`	`full` (edge-to-edge) or `boxed` (centered max-width)
`design.color.primary`	string	`''`	Primary brand color (CSS color)
`design.color.secondary`	string	`''`	Secondary brand color
`design.color.body-color`	string	`''`	Body text color
`design.color.headings-color`	string	`''`	Heading color
`design.color.header-bg`	string	`''`	Header background
`design.color.header-middle-bg`	string	`''`	Header middle band (layouts 2/3)
`design.color.footer-bg`	string	`''`	Footer background
`design.color.mobile-menu-bg`	string	`''`	Off-canvas / mmenu background
`design.color.page-bg`	string	`''`	Page background (in `boxed` layout)
`design.color.dark-header`	bool	`false`	Marks the header background as dark (flips text color)
`design.color.main-nav-dark`	bool	`false`	Marks main nav background as dark

Design — Color Mode (Dark / Contrast)

Key	Type	Default	Purpose
`design.color.enable-dark-mode`	bool	`false`	Enable dark-mode rendering
`design.color.color-mode-type`	enum	`media-query`	`data` (toggle via `data-bs-theme`) or `media-query` (`prefers-color-scheme`)
`design.color.force-dark-mode`	bool	`false`	Always render dark
`design.color.enable-contrast-mode`	bool	`false`	Enable high-contrast variant
`design.color.contrast-mode-type`	enum	`media-query`	`data` or `media-query`
`design.color.*-dark`	string	`''`	Dark variants: `body-color-dark`, `header-bg-dark`, `footer-bg-dark`, `mobile-menu-bg-dark`, `page-bg-dark`, `navbar-dark`, `navbar-dark-toggler-border-color`

Design — Fonts

Key	Type	Default	Purpose
`design.font.font-family-sans-serif`	string	`''`	Sans-serif stack
`design.font.font-family-base`	string	`''`	Base stack
`design.font.headings-font-family`	string	`''`	Headings stack
`design.font.font-size-base`	string	`1rem`	Base font size
`design.font.display1-font-size` … `display6-font-size`	string	`5rem` … `2.5rem`	Display sizes
`design.font.h1-font-size` … `h6-font-size`	string	`2.0rem` … `1rem`	Heading sizes

When to use these vs. SCSS: if the customer should change colors at runtime via the Settings UI → use design.color.* (rendered as CSS custom properties). If the values are baked-in branding → SCSS !default overrides (see t3bootstrap-overrides).

Icons / Assets

Key	Type	Default	Purpose
`icons.uploads.prefix`	string	`t3b-icon-file-`	Icon-set prefix for upload lists
`icons.uploads.font-size`	string	`1.2rem`	Icon size
`assets.jquerycore`	string	`EXT:template/.../jquery-3.7.1.min.js`	jQuery path
`assets.jsBootstrap`	string	`EXT:template/.../bootstrap.min.js`	Bootstrap JS path
`assets.jsModernizr`	string	`''`	Modernizr script

Accessibility / Expert / Other

Key	Type	Default	Purpose
`aria.appendNewTabExplanationToAriaLabel`	bool	`true`	Add "(opens in new tab)" to aria-label of `_blank` links
`adminPanelOn`	bool	`true`	Show TYPO3 admin panel (also needs FE-user-group config)
`liveMode`	bool	`false`	Combine + compress CSS/JS
`loginPid`	int	`0`	UID of the felogin page

Settings From `t3bootstrap/core` (T3BCore set)

vendor/t3bootstrap/core/Configuration/Sets/T3BCore/settings.definitions.yaml. Categories prefixed t3bcore.*. Keys are mostly under the legacy plugin.tx_t3bcore.settings.* path (both YAML and TypoScript-constant access work).

Bootstrap Tokens

Key	Type	Default
`plugin.tx_t3bcore.settings.font-size-root`	int	`16`
`plugin.tx_t3bcore.settings.breakpoints.xs` … `xxl`	int	`0` / `576` / `768` / `992` / `1200` / `1400`
`plugin.tx_t3bcore.settings.breakpointsMax.xs` … `xxl`	number	`575.98` / `767.98` / `991.98` / `1199.98` / `1399.98` / `0`
`plugin.tx_t3bcore.settings.containerWidths.sm` … `xxl`	int	`540` / `720` / `960` / `1140` / `1340`

Grid

Key	Type	Default
`plugin.tx_t3bcore.settings.gridColumns`	int	`12`
`plugin.tx_t3bcore.settings.defaultGridLayout`	string	`100g:100t`

Spacing System

7-step rem scale exposed as --t3b-space-<key> CSS custom properties and t3b-pt-<key>, t3b-pb-<key> utility classes. Each step is editable:

Key	Type	Default rem
`t3bcore.spacing.step.none.rem`	number	`0`
`t3bcore.spacing.step.xs.rem`	number	`0.25`
`t3bcore.spacing.step.s.rem`	number	`0.5`
`t3bcore.spacing.step.m.rem`	number	`1`
`t3bcore.spacing.step.l.rem`	number	`1.5`
`t3bcore.spacing.step.xl.rem`	number	`3`
`t3bcore.spacing.step.xxl.rem`	number	`6`

Defaults mirror Bootstrap's $spacers plus a sixth step (6rem).

Icons

Key	Type	Default	Enum
`plugin.tx_t3bcore.settings.icon.rendering`	string	`svg`	`svg` / `iconfont`
`plugin.tx_t3bcore.settings.icon.defaultSize`	string	`md`	`sm` / `md` / `lg`
`plugin.tx_t3bcore.settings.icon.defaultColor`	string	`text`	(free string)

Images

Key	Type	Default	Enum
`plugin.tx_t3bcore.settings.imageFullWidth`	int	`2200`	—
`plugin.tx_t3bcore.settings.cropVariantFullWidth`	string	`full`	—
`plugin.tx_t3bcore.settings.fullwidthClass`	string	`img-fullwidth`	—
`plugin.tx_t3bcore.settings.preferredImageFormat`	string	`''`	`''` / `webp` / `avif`

Buttons

Key	Type	Default
`plugin.tx_t3bcore.settings.button.classes`	string	`primary,success,warning,danger,info,secondary,light,dark`

Privacy

Key	Type	Default
`plugin.tx_t3bcore.settings.privacyPolicies.optinVideo`	bool	`false`
`plugin.tx_t3bcore.settings.privacyPolicies.google.defaultLang`	string	`https://policies.google.com/privacy`
`plugin.tx_t3bcore.settings.privacyPolicies.vimeo.defaultLang`	string	`https://vimeo.com/privacy`

Special Custom Setting Types

T3Bootstrap ships non-standard setting types for repeating structures. The backend Settings editor renders them as nested list editors.

Type	Used by	Item shape
`ctabaritemlist`	`callToAction.items`	`id`, `icon`, `color`, `sorting`, `modal`, `entries[]`
`ctabuttonlist`	`callToAction.headerButtons`, `callToAction.footerButtons`	(button list)
`calltoactionlist`	`callToAction.socialLinks`	`id`, `icon`, `title`, `color`, `sorting`, `links[]`

Pre-defined social platforms in callToAction.socialLinks: facebook, youtube, instagram, pinterest, xing, linkedin, git (GitHub), mastodon, twitter, x, bluesky, tiktok, kununu. Each has an id, prebuilt icon (e.g. t3b-icon-facebook-f), brand color, and an empty links[] array that the editor fills with language-specific URLs.

Editing in `settings.yaml`

callToAction:
  socialLinks:
    - id: facebook
      icon: t3b-icon-facebook-f
      title: Facebook
      color: '#1877f2'
      sorting: 2
      links:
        - languageId: 0
          link: 'https://facebook.com/customer-de'
        - languageId: 1
          link: 'https://facebook.com/customer-en'
    - id: linkedin
      icon: t3b-icon-linkedin
      title: LinkedIn
      color: '#0a66c2'
      sorting: 7
      links:
        - languageId: 0
          link: 'https://linkedin.com/company/customer'

To add a custom platform not in the default list, append a fresh item with your own id and matching icon — the rendering ViewHelper iterates the list as-is.

Settings From Add-On Sets

`t3bootstrap/blog` (`t3bootstrap/t3bootstrap-blog` extension)

Key	Type	Default	Enum
`t3bootstrap-blog.listDesign`	string	`default`	`default` / `card`

`wapplersystems/filecollection-gallery`

Categories: filecollectionGallery.templates / .mobile / .desktop / .lightbox. Includes filecollectiongallery.view.templateRootPath and per-breakpoint gallery options. Browse vendor/wapplersystems/filecollection_gallery/Configuration/Sets/FileCollectionGallery/settings.definitions.yaml for the full list.

`t3bootstrap/template` legacy `styles.content.textmedia`

Not in settings.definitions.yaml; lives in the upstream settings.yaml of the Template set:

styles:
  content:
    textmedia:
      linkWrap:
        lightboxEnabled: true
        width: 1200m
        height: 900m

Override to disable the lightbox, or to change the click-to-zoom dimensions.

Other Add-Ons Without Typed Definitions

Many add-on sets still rely on legacy constants.typoscript. Common ones:

News (t3bootstrap/t3bootstrap-news): plugin.tx_news.settings.* from EXT:news with t3bootstrap-specific list/detail layouts via the Site Set selected.
Form (t3bootstrap/t3bootstrap-form): plugin.tx_form.* standard EXT:form keys.
Address (t3bootstrap/t3bootstrap-address): list/detail PIDs.

For these, override via TypoScript constants in the customer extension (see t3bootstrap-overrides Layer 1).

Cookbook — Common Tasks

Each task lists the YAML snippet to drop into the customer's config/sites/<site>/settings.yaml.

1. Change brand colors (runtime themable)

design:
  color:
    primary: '#c81d25'
    secondary: '#2b6cb0'
    body-color: '#1a202c'
    headings-color: '#1a202c'

These become CSS custom properties; no recompile needed.

2. Switch header layout + make non-sticky

header:
  layout: 2          # logo above nav
  isSticky: false
  searchbox: true
  slogan: 'Beispiel-Slogan in HTML'

navigation:
  mobile:
    menuType: offcanvas
    showSearchbox: true
    showLanguage: true
    expandSubmenus: false

navigation:
  main:
    menuType: megamenu
    megaMenuPid: 42       # the page that holds the megamenu structure

5. Language switcher always visible in main nav

navigation:
  language:
    enabled: true
    showAlwaysInMainNavigation: true
    showInMetaNavigation: false
    layout: Row              # not dropdown
    itemLayout: FlagAndLabel
    hideCurrent: false

6. Footer content from a central sysfolder + custom credits

footer:
  contentPageId: 99           # sysfolder UID with footer CEs
  copyright: '© 2026 Customer GmbH'
  creditsEnabled: false       # hide the "Created with …" line

7. Dark mode via data attribute (manual toggle)

design:
  color:
    enable-dark-mode: true
    color-mode-type: data       # not media-query
    body-color-dark: '#e4e4e7'
    page-bg-dark: '#0f172a'
    header-bg-dark: '#020617'
    footer-bg-dark: '#020617'
    mobile-menu-bg-dark: '#020617'

A toggle button must set data-bs-theme="dark" on <html>.

8. Custom Bootstrap breakpoints (mobile-first scale)

plugin:
  tx_t3bcore:
    settings:
      breakpoints:
        xs: 0
        sm: 480       # tighter mobile threshold
        md: 720
        lg: 980
        xl: 1280
        xxl: 1480
      breakpointsMax:
        xs: 479.98
        sm: 719.98
        md: 979.98
        lg: 1279.98
        xl: 1479.98
        xxl: 0
      containerWidths:
        sm: 460
        md: 700
        lg: 940
        xl: 1240
        xxl: 1420

9. Custom spacing scale (bigger overall)

t3bcore:
  spacing:
    step:
      xs: { rem: 0.5 }
      s:  { rem: 1 }
      m:  { rem: 2 }
      l:  { rem: 3 }
      xl: { rem: 5 }
      xxl: { rem: 8 }

10. Switch all images to WebP

plugin:
  tx_t3bcore:
    settings:
      preferredImageFormat: webp

11. Enable indexed-search

search:
  searchPageId: 7                # the page hosting indexed_search Pi1
  indexedSearch:
    indexingOn: true
    indexExternalsOn: false
    indexMetaTagsOn: true
header:
  searchbox: true

12. PWA / web manifest + theme color

meta:
  webmanifest: '/site.webmanifest'
  themeColor: '#005262'
  appleTouchIcon: 'EXT:site_customer/Resources/Public/Icons/apple-touch-icon-180.png'
  androidIcon192: 'EXT:site_customer/Resources/Public/Icons/android-chrome-192.png'
  androidIcon512: 'EXT:site_customer/Resources/Public/Icons/android-chrome-512.png'
  maskIcon: 'EXT:site_customer/Resources/Public/Icons/safari-pinned-tab.svg'
  maskIconColor: '#005262'

Pair with the typo3-skills:typo3-favicon-manifest skill for the route-enhancer side.

13. Felogin

loginPid: 41

14. Hide the t3bootstrap header comment

headercomment: ''

body:
  callToAction:
    enabled: true
    position: left
    class: 'd-flex'           # always visible

callToAction:
  socialLinks:
    - id: linkedin
      icon: t3b-icon-linkedin
      title: LinkedIn
      color: '#0a66c2'
      sorting: 1
      links:
        - languageId: 0
          link: 'https://linkedin.com/company/customer'
    - id: github
      icon: t3b-icon-github-alt
      title: GitHub
      color: '#333'
      sorting: 2
      links:
        - languageId: 0
          link: 'https://github.com/customer'

16. Header CTA buttons (multi-language)

callToAction:
  headerButtons:
    - id: book-demo
      label: 'Demo buchen'
      class: 'btn btn-primary'
      links:
        - languageId: 0
          link: 't3://page?uid=110'
          label: 'Demo buchen'
        - languageId: 1
          link: 't3://page?uid=110&L=1'
          label: 'Book a demo'

17. Customer-specific defaults shipped with site package

In local_packages/<customer>/site_<customer>/Configuration/Sets/Site<Customer>/settings.yaml:

design:
  color:
    primary: '#c81d25'
    secondary: '#2b6cb0'
header:
  layout: 4
  isSticky: true
navigation:
  main:
    menuType: smartmenus
    levels: 2
footer:
  creditsEnabled: false

These become the default when the customer set is added to the site config; the backend Settings editor still lets the editor override per-site.

YAML Structure Tips

Dotted vs. Nested

Both work and produce the same effective setting:

# Nested (recommended for readability)
header:
  logo: 'EXT:site_customer/Resources/Public/Images/logo.svg'
  isSticky: true
  layout: 4

# Dotted (compact for single overrides)
header.logo: 'EXT:site_customer/Resources/Public/Images/logo.svg'
header.isSticky: true
header.layout: 4

The TypoScript-constant access ({$header.logo}) works regardless.

Quoting Pitfall

A bool default of false set in YAML as the string 'false' becomes truthy. Always write booleans unquoted:

# ✅ correct
header.isSticky: false

# ❌ wrong — string 'false' evaluates to truthy when consumed as bool
header.isSticky: 'false'

Path Already Defined as Both Setting and Constant

When the same path is set in settings.yaml AND in a constants.typoscript, the settings YAML wins in v14. Don't define a value in both places.

Anti-Patterns

Anti-pattern	Why it's bad	Correct approach
Editing `vendor/t3bootstrap/template/.../settings.definitions.yaml`	Wiped by composer update; also doesn't override anything (it's the definition, not the value)	Override the value in `config/sites/<site>/settings.yaml`
Putting brand colors in SCSS variables when editor needs to change them	Requires SCSS rebuild; editor can't tweak in backend	Use `design.color.*` settings (CSS custom properties)
Setting `searchbox: true` without `search.searchPageId`	Searchbox renders, every submit 404s	Configure `search.searchPageId` together
Adding a customer-specific social platform via hardcoded Fluid	Loses the multi-language link editor	Add an item to `callToAction.socialLinks` with a unique `id` + icon
Forking the whole `settings.definitions.yaml` "to add one field"	Maintenance burden	Add your own definition in the customer extension's `Configuration/Sets/Site<Customer>/settings.definitions.yaml` — it merges with upstream
Mixing `header.logo = ...` in a customer constants.typoscript AND `settings.yaml`	Confusing — YAML wins, the TS line looks active but isn't	Pick one (YAML preferred)
Setting both `enable-dark-mode: true` and `force-dark-mode: true` without reason	Force overrides toggle UI, editor can't switch back	Only `force-dark-mode` for design previews; otherwise just `enable-dark-mode`
Setting `navigation.main.menuType` per language	Type is structural; switching it breaks markup	One menu type site-wide; vary only visual properties

Where Things Live (Quick Reference)

# Master definitions
vendor/t3bootstrap/template/Configuration/Sets/Template/settings.definitions.yaml
vendor/t3bootstrap/core/Configuration/Sets/T3BCore/settings.definitions.yaml
vendor/t3bootstrap/t3bootstrap-blog/Configuration/Sets/T3BootstrapBlog/settings.definitions.yaml
vendor/wapplersystems/filecollection_gallery/Configuration/Sets/FileCollectionGallery/settings.definitions.yaml

# Upstream defaults
vendor/t3bootstrap/template/Configuration/Sets/Template/settings.yaml        # textmedia lightbox
vendor/<each set>/Configuration/Sets/<SetName>/settings.yaml

# Project overrides
config/sites/<site>/settings.yaml                                            # what the backend writes

# Customer extension shipping defaults
local_packages/<customer>/site_<customer>/Configuration/Sets/Site<Customer>/settings.yaml

Verification Checklist

After changing settings:

No cache flush needed for typed settings — they're read live; but TypoScript-rendered values (most uses) still rely on the TypoScript cache. Safer: ddev exec vendor/bin/typo3 cache:flush.
Re-load the frontend and inspect: e.g. for color changes look at the rendered CSS for --bs-primary / --t3b-color-primary.
claude-diagnostics:
- vendor/bin/typo3 ts:constants --path=header.logo — confirm the effective value.
- vendor/bin/typo3 site:settings --site=<id> — full dump.
For settings that affect generated CSS (breakpoints, spacing, colors when SCSS-driven): trigger the customer's SCSS rebuild (ws_scss watcher, or npm run build).
For settings that affect JS (mobile menu type, AOS): hard reload the frontend; the JS migrator decides at page load.

For overrides that aren't settable (template structure, partials), switch to the t3bootstrap-overrides skill. For the bootstrap setup, see t3bootstrap-site-package.

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