How Capell Works

Capell is built as a package-based CMS foundation for Laravel. The host packages in this repository own the main schema, admin surface, frontend surface, and plugin lifecycle support, while larger features ship as optional add-on packages.

The Core Model

Most Capell work follows this path:

Site -> Language -> Page URL -> Page -> Blueprint/Layout/Theme -> Rendered frontend page

flowchart LR
    Site["Site"] -->|"owns"| Page["Page"]
    Site -->|"routes through"| Domain["Site domain"]
    Site -->|"uses"| Theme["Theme"]
    Theme -->|"provides"| Layout["Layout"]
    Blueprint["Blueprint"] -->|"defines behaviour"| Page
    Layout -->|"renders"| Page
    Page -->|"localized path"| PageUrl["Page URL"]
    Page -->|"localized content"| Translation["Translation"]
    Language["Language"] -->|"scopes"| PageUrl
    Language -->|"scopes"| Translation
    Page -->|"media and assets"| Media["Media"]

The main concepts map to one idea each:

Concept	One-line meaning
Site	A public web property. It can have one domain or several, one language or several, and its own pages, settings, and theme choices.
Page	A structured record in a hierarchy. It owns translated URLs, type-specific fields, publishing state, media, and layout relationships.
Page URL	A site-scoped, language-aware path and slug. Each page can have several, including automatic redirects when slugs or parents change.
Layout	Connects content to frontend rendering. This is the core Layout template model, not the ContentSections Layout Builder blocks editors drag onto a page.
Blueprint	Reusable editing, rendering, and behaviour rules shared across pages, widgets, layouts, and package-owned content models.
Theme	The active theme path and identity a site renders through.

The important product detail is that one visible page is not just one content record. It is a site-scoped, language-aware URL, a page record, type/blueprint rules, layout selection, media, settings, package contributions, cache dependencies, and public output safety checks working together.

The main content records are deliberately small and composable:

Model	Practical job
Site	Owns domains, languages, settings, pages, and theme choices
Language	Defines locale and default-language behaviour for a site
Page	Stores the page tree, publishing state, assigned blueprint, and relationships
PageUrl	Stores localized URLs and slugs for each page
Blueprint	Stores reusable editing, rendering, and behaviour rules
Layout	Connects structured content to frontend templates
Theme	Records the active theme path and identity
Media	Stores media library records and relationships
Translation	Stores translated field values across models

Pages use a nested tree, so moving a parent page can affect child URLs, navigation, breadcrumbs, cache keys, and frontend rendering. That is why writes should go through Capell actions instead of model methods with hidden side effects.

For a fuller visual reference, see the Core relationship map.

Request And Editing Flow

Capell keeps the editing surface, domain behaviour, and frontend rendering separate.

Admin form or HTTP request
    -> Data object
    -> Action::run()
    -> Core model write
    -> Events, subscribers, and cache invalidation
    -> Frontend request resolves the updated page

Data objects carry structured state across package, HTTP, Livewire, and Filament boundaries. Actions own the domain behaviour. Filament resources, Livewire components, controllers, and commands should call actions rather than duplicating CMS rules inline.

On the public side, frontend requests resolve the site, language, page, layout, and render context before returning a Blade response. When caching is enabled, the frontend middleware can serve cached HTML and rely on model events or registered cache dependencies to invalidate affected pages after content changes.

In-page editing sits outside that rendered HTML. Frontend Authoring waits until the page has loaded, calls the beacon, and only then decorates the page for an authenticated admin. Anonymous users and non-admin users get the same ordinary page HTML: no editor scripts, no hidden region markers, no model IDs, and no signed edit URLs.

Host Packages

These packages make up the normal product in this repository:

Package	Composer name	Status	What it owns
Core	capell-app/core	Available	Main schema, models, registries, settings orchestration, install and upgrade flow
Admin	capell-app/admin	Available	Filament admin surface, resources, settings UI, dashboards, and admin extension points
Frontend	capell-app/frontend	Available	Public routing, rendering, cache-aware middleware, asset aggregation, and frontend extension points
Installer	capell-app/installer	Available	Installer guidance and cleanup flow
Marketplace	capell-app/marketplace	Available	Extension marketplace browsing, acquisition, and install authorization support

Host Features Vs Package Features

Capell uses host packages for shared contracts and optional packages for product depth. Keep this split clear when you build or document a feature.

Capability	Host package responsibility	Optional package responsibility
Page and URL model	Core owns sites, languages, pages, Page URLs, layouts, blueprints, themes, redirects, and shared settings.	Blog, ContentSections, URL Manager, and other packages add specialist content types or richer workflows.
Admin workspace	Admin owns the Filament panel, core resources, policies, settings shell, extension surfaces, and dashboard slots.	Packages register resources, pages, widgets, settings, reports, schema extenders, and workflow actions.
Public rendering	Frontend owns request resolution, render context, public Blade/Livewire output, hooks, assets, cache headers, and public-output safety.	Themes, HTML Cache, Frontend Authoring, SEO Suite, Site Discovery, Inertia, and widget packages add runtime behaviour.
Publishing	Host pages have publishing dates, visibility checks, policies, and cache invalidation hooks.	Publishing Studio adds workspaces, approvals, scheduling, revisions, preview links, and workflow dashboards.
Recovery	Admin provides the Recovery Center shell and contracts.	Migration Assistant owns export, import, media ingest, rollback reports, and package archive workflows.
SEO and discovery	Host models provide site/language URL foundations and canonical relationships.	SEO Suite, Site Discovery, URL Manager, and Search add metadata, sitemaps, robots, redirects, audits, and search.

Optional Packages

Optional packages extend the host surfaces rather than replacing them.

Examples:

• Capell Foundation: ContentSections, blog, navigation, frontend authoring, the built-in Frontend default theme, HTML Cache, and Site Discovery
• Capell Publishing Pro: Publishing Studio and preview tooling
• Capell Operations: Migration Assistant, Diagnostics, Exception Reports, and Login Audit
• Capell Search & SEO: SEO operations and site search

Use Approved packages for the package registry.

Developer Deep Dive Example

Imagine a package that adds an Article content type. A non-technical description is simple: editors can create articles, show latest articles on pages, and publish them safely. The developer implementation should stay split across the Capell surfaces.

Surface	What the package registers	Why it belongs there
Core	Article model, migrations, page subject contract, article blueprint, settings class, and any lifecycle subscribers.	Core owns structured records and package contracts.
Admin	Article resource, dashboard Filament widget, settings schema, and page form extenders.	Admin owns Filament surfaces and editor controls.
Frontend	Article widget, render hooks, reserved routes if needed, assets, and cache dependencies.	Frontend owns public rendering and safe output.
Package	Actions and Data objects such as PublishArticleAction and ArticleData.	The package owns product behaviour; host packages expose extension points.

Provider Wiring

The provider wiring should be boring and explicit:

use Capell\Admin\Facades\CapellAdmin;
use Capell\Core\Data\PageTypeData;
use Capell\LayoutBuilder\Data\LayoutWidgets\LayoutWidgetDefinitionData;
use Capell\Core\Facades\CapellCore;
use Capell\LayoutBuilder\Support\LayoutWidgets\LayoutWidgetRegistry;
use Capell\Frontend\Enums\RenderHookLocation;
use Capell\Frontend\Support\Cache\CacheInvalidationRegistry;
use Capell\Frontend\Support\Render\RenderHookRegistry;
use Vendor\Articles\Admin\ArticleAdminBridge;
use Vendor\Articles\Models\Article;

public function boot(
    LayoutWidgetRegistry $widgets,
    RenderHookRegistry $renderHooks,
    CacheInvalidationRegistry $cacheInvalidation,
): void {
    CapellCore::registerPageType(new PageTypeData(
        name: 'article',
        model: Article::class,
        label: __('capell-articles::pages.article'),
    ));

    CapellAdmin::registerAdminBridge('capell-app/articles', ArticleAdminBridge::class);

    $widgets->registerDefinition(LayoutWidgetDefinitionData::frontendBlade(
        key: 'latest-articles',
        component: 'capell-articles::widgets.latest-articles',
        resourceGroups: ['capell-articles.listing'],
    ));

    $renderHooks->register(
        RenderHookLocation::HeadClose,
        fn (): string => view('capell-articles::frontend.metadata')->render(),
    );

    $cacheInvalidation->registerDependency(Article::class, ['articles-index', 'home']);
}

Admin Bridge

The admin bridge then contributes the Filament pieces without putting those concerns in the host Admin package:

use Capell\Admin\Contracts\Bridges\AdminBridge;
use Capell\Admin\Data\Bridges\AdminBridgeContextData;
use Capell\Admin\Support\Bridges\AdminBridgeRegistrar;

final class ArticleAdminBridge implements AdminBridge
{
    public function register(AdminBridgeRegistrar $registrar, AdminBridgeContextData $context): void
    {
        $registrar->resource(ArticleResource::class, group: 'content', name: 'articles');
        $registrar->filamentDashboardWidget(RecentArticlesWidget::class);
        $registrar->settingsClass('articles', ArticleSettings::class);
        $registrar->settingsSchema('articles', ArticleSettingsSchema::class);
    }
}

Actions And Data Boundary

The Actions/Data boundary keeps product rules out of UI code:

use Lorisleiva\Actions\Concerns\AsObject;

final class PublishArticleAction
{
    use AsObject;

    public function handle(ArticleData $data): Article
    {
        return Article::query()->updateOrCreate(
            ['slug' => $data->slug],
            $data->toArray(),
        );
    }
}

Filament pages, commands, queued jobs, controllers, and Livewire components call PublishArticleAction::run($data). They should not repeat slug rules, cache invalidation, permission checks, or publishing rules inline.

Deep Dive Checklist

Use this checklist when deciding whether a documented feature is complete:

Question	Good answer
Who owns the data?	Host model, package model, or app model is named clearly.
Where are writes handled?	An Action owns the behaviour and receives a Data object or explicit typed arguments.
How does the admin see it?	Admin bridge, resource, page, widget, settings schema, or tagged extender is named.
How does public output render?	Frontend component, widget, theme view, render hook, or renderer is named.
What happens when the package is absent?	The selector, field, route, widget, hook, or dashboard surface is simply absent.
How is cached output invalidated?	The package registers model dependencies or documents why the content is not cache-affecting.
Is public HTML safe?	Anonymous and non-admin responses expose no editor controls, model IDs, field paths, package internals, or signed admin URLs.

Service Provider Responsibilities

Each host package boots a different part of the platform.

Provider	Responsibility
Core service provider	Registers migrations, config, morph map requirements, commands, policies, translation listeners, and shared macros
Admin service provider	Registers Filament resources, admin commands, schema extenders, event subscribers, type interceptors, and Filament macros
Frontend service provider	Registers public routes, frontend middleware, Livewire components, HTML caching, minification, navigation helpers, and frontend assets

Add-on packages should plug into these surfaces through registries, tagged services, contracts, and service providers. They should not patch host package classes directly.

What Editors See

Editors mainly work through the Admin package:

• pages and page URLs
• sites and languages
• layouts, themes, and media
• settings, dashboards, and package-backed screens

Some screens only appear when the relevant optional package is installed. Admin should describe those as Optional, not built-in.

What Frontend Owns

Frontend resolves the request, identifies the site and page, builds the render context, and returns the response. When caching is enabled, it also participates in static HTML cache reads, writes, invalidation, and related middleware.

See Frontend for the operational flow.

Extension Points

Capell is meant to be extended through package-safe hooks.

Need	Extension point
Register a page subject	CapellCore::registerPageType() with PageTypeData
Register package admin concerns	AdminBridge and AdminBridgeRegistrar
Add admin pages or resources	CapellAdmin::contributeToAdminSurface(...)
Add dashboard Filament widgets	CapellAdmin::registerDashboardFilamentWidget()
Add settings UI	SettingsSchemaRegistry::register() and registerSettingsClass()
Add admin widgets	CapellAdmin::registerWidget() or registerDiscoverableWidgets()
Add frontend widgets	LayoutWidgetRegistry::register()
Add frontend HTML	RenderHookRegistry::register()
Add Tailwind sources or imports	TailwindAssetsRegistry::registerSource() and registerImport()
Wire cache invalidation	CacheInvalidationRegistry::registerDependency()

Practical Reading Order

1. Install guide
2. Admin docs
3. Frontend docs
4. Creating Capell packages
5. Package authoring

Blueprints affect editor fields, frontend components, widgets, layouts, cache behavior, and reuse. Use package extension points instead of editing host models directly.