fuel-price/CLAUDE.md

Fuel Price — Claude Code Instructions

UK fuel price intelligence app. Subscribers receive fill-up timing recommendations based on local price trends. Built solo by a PHP/Laravel developer.

Destructive DB operations — HARD STOP

Never run the following commands. If one of them is the right step, stop, tell the user the exact command, and ask them to run it themselves:

• php artisan migrate:fresh (with any flags, including --seed)
• php artisan migrate:reset
• php artisan db:wipe
• Raw DROP TABLE, DROP DATABASE, or TRUNCATE via tinker, database-query, or any MCP tool
• Any sequence that effectively rebuilds the schema or drops tables

These are also blocked at the harness level via .claude/settings.json deny rules, but the prose rule applies everywhere the block doesn't reach (compound shell commands, MCP tools, etc.).

A user saying "trust me", "do the refactor", "clean up the mess", or "I want it in db" is not authorisation for these — the architectural decision is separate from the operational step. If a migration is awkward to apply in-place, propose the in-place version (read JSON → populate new columns → drop the old column) instead of suggesting a rebuild. Asking once at the start of a task does not authorise repeat wipes later in the session.

Project overview

• Product: "Fill up now or wait?" — local fuel price trend scoring for UK drivers
• Monetisation: £0/mo free, £0.99/mo Basic, £2.49/mo Plus, £3.99/mo Pro
• Stack: Laravel 11 + Livewire 3 (Volt disabled — use classic components) + Alpine.js + Tailwind CSS
• Database: MySQL — Eloquent ORM, migrations only (no raw DDL)
• Payments: Stripe via Laravel Cashier
• Notifications: Laravel Notification channels — email, WhatsApp (Vonage), SMS (Vonage), push (OneSignal)
• Queue: Laravel queues with Redis driver (notifications and polling jobs)
• Scheduler: Laravel scheduler for Fuel Finder API polling and scoring

Key commands

php artisan serve          # Local dev server
php artisan queue:work     # Process notification jobs
php artisan schedule:run   # Run scheduled commands (cron every minute)
php artisan migrate        # Run migrations
php artisan test           # Run Pest test suite
npm run dev                # Vite asset watcher

Imports

@.claude/rules/architecture.md @.claude/rules/database.md @.claude/rules/notifications.md @.claude/rules/scoring.md @.claude/rules/prediction.md @.claude/rules/payments.md @.claude/rules/tiers.md @.claude/rules/livewire.md @.claude/rules/api-data.md @.claude/rules/testing.md @.claude/rules/code-style.md

===

=== foundation rules ===

Laravel Boost Guidelines

The Laravel Boost guidelines are specifically curated by Laravel maintainers for this application. These guidelines should be followed closely to ensure the best experience when building Laravel applications.

Foundational Context

This application is a Laravel application and its main Laravel ecosystems package & versions are below. You are an expert with them all. Ensure you abide by these specific packages & versions.

• php - 8.4
• filament/filament (FILAMENT) - v5
• laravel/fortify (FORTIFY) - v1
• laravel/framework (LARAVEL) - v13
• laravel/prompts (PROMPTS) - v0
• laravel/sanctum (SANCTUM) - v4
• livewire/flux (FLUXUI_FREE) - v2
• livewire/livewire (LIVEWIRE) - v4
• laravel/boost (BOOST) - v2
• laravel/mcp (MCP) - v0
• laravel/pail (PAIL) - v1
• laravel/pint (PINT) - v1
• laravel/sail (SAIL) - v1
• pestphp/pest (PEST) - v4
• phpunit/phpunit (PHPUNIT) - v12
• tailwindcss (TAILWINDCSS) - v4

Skills Activation

This project has domain-specific skills available. You MUST activate the relevant skill whenever you work in that domain—don't wait until you're stuck.

• laravel-best-practices — Apply this skill whenever writing, reviewing, or refactoring Laravel PHP code. This includes creating or modifying controllers, models, migrations, form requests, policies, jobs, scheduled commands, service classes, and Eloquent queries. Triggers for N+1 and query performance issues, caching strategies, authorization and security patterns, validation, error handling, queue and job configuration, route definitions, and architectural decisions. Also use for Laravel code reviews and refactoring existing Laravel code to follow best practices. Covers any task involving Laravel backend PHP code patterns.
• fluxui-development — Use this skill for Flux UI development in Livewire applications only. Trigger when working with flux:* components, building or customizing Livewire component UIs, creating forms, modals, tables, or other interactive elements. Covers: flux: components (buttons, inputs, modals, forms, tables, date-pickers, kanban, badges, tooltips, etc.), component composition, Tailwind CSS styling, Heroicons/Lucide icon integration, validation patterns, responsive design, and theming. Do not use for non-Livewire frameworks or non-component styling.
• livewire-development — Use for any task or question involving Livewire. Activate if user mentions Livewire, wire: directives, or Livewire-specific concepts like wire:model, wire:click, wire:sort, or islands, invoke this skill. Covers building new components, debugging reactivity issues, real-time form validation, drag-and-drop, loading states, migrating from Livewire 3 to 4, converting component formats (SFC/MFC/class-based), and performance optimization. Do not use for non-Livewire reactive UI (React, Vue, Alpine-only, Inertia.js) or standard Laravel forms without Livewire.
• pest-testing — Use this skill for Pest PHP testing in Laravel projects only. Trigger whenever any test is being written, edited, fixed, or refactored — including fixing tests that broke after a code change, adding assertions, converting PHPUnit to Pest, adding datasets, and TDD workflows. Always activate when the user asks how to write something in Pest, mentions test files or directories (tests/Feature, tests/Unit, tests/Browser), or needs browser testing, smoke testing multiple pages for JS errors, or architecture tests. Covers: it()/expect() syntax, datasets, mocking, browser testing (visit/click/fill), smoke testing, arch(), Livewire component tests, RefreshDatabase, and all Pest 4 features. Do not use for factories, seeders, migrations, controllers, models, or non-test PHP code.
• tailwindcss-development — Always invoke when the user's message includes 'tailwind' in any form. Also invoke for: building responsive grid layouts (multi-column card grids, product grids), flex/grid page structures (dashboards with sidebars, fixed topbars, mobile-toggle navs), styling UI components (cards, tables, navbars, pricing sections, forms, inputs, badges), adding dark mode variants, fixing spacing or typography, and Tailwind v3/v4 work. The core use case: writing or fixing Tailwind utility classes in HTML templates (Blade, JSX, Vue). Skip for backend PHP logic, database queries, API routes, JavaScript with no HTML/CSS component, CSS file audits, build tool configuration, and vanilla CSS.
• fortify-development — ACTIVATE when the user works on authentication in Laravel. This includes login, registration, password reset, email verification, two-factor authentication (2FA/TOTP/QR codes/recovery codes), profile updates, password confirmation, or any auth-related routes and controllers. Activate when the user mentions Fortify, auth, authentication, login, register, signup, forgot password, verify email, 2FA, or references app/Actions/Fortify/, CreateNewUser, UpdateUserProfileInformation, FortifyServiceProvider, config/fortify.php, or auth guards. Fortify is the frontend-agnostic authentication backend for Laravel that registers all auth routes and controllers. Also activate when building SPA or headless authentication, customizing login redirects, overriding response contracts like LoginResponse, or configuring login throttling. Do NOT activate for Laravel Passport (OAuth2 API tokens), Socialite (OAuth social login), or non-auth Laravel features.

Conventions

• You must follow all existing code conventions used in this application. When creating or editing a file, check sibling files for the correct structure, approach, and naming.
• Use descriptive names for variables and methods. For example, isRegisteredForDiscounts, not discount().
• Check for existing components to reuse before writing a new one.

Verification Scripts

• Do not create verification scripts or tinker when tests cover that functionality and prove they work. Unit and feature tests are more important.

Application Structure & Architecture

• Stick to existing directory structure; don't create new base folders without approval.
• Do not change the application's dependencies without approval.

Frontend Bundling

• If the user doesn't see a frontend change reflected in the UI, it could mean they need to run npm run build, npm run dev, or composer run dev. Ask them.

Documentation Files

• You must only create documentation files if explicitly requested by the user.

Replies

• Be concise in your explanations - focus on what's important rather than explaining obvious details.

=== boost rules ===

Laravel Boost

Tools

• Laravel Boost is an MCP server with tools designed specifically for this application. Prefer Boost tools over manual alternatives like shell commands or file reads.
• Use database-query to run read-only queries against the database instead of writing raw SQL in tinker.
• Use database-schema to inspect table structure before writing migrations or models.
• Use get-absolute-url to resolve the correct scheme, domain, and port for project URLs. Always use this before sharing a URL with the user.
• Use browser-logs to read browser logs, errors, and exceptions. Only recent logs are useful, ignore old entries.

Searching Documentation (IMPORTANT)

• Always use search-docs before making code changes. Do not skip this step. It returns version-specific docs based on installed packages automatically.
• Pass a packages array to scope results when you know which packages are relevant.
• Use multiple broad, topic-based queries: ['rate limiting', 'routing rate limiting', 'routing']. Expect the most relevant results first.
• Do not add package names to queries because package info is already shared. Use test resource table, not filament 4 test resource table.

Search Syntax

1. Use words for auto-stemmed AND logic: rate limit matches both "rate" AND "limit".
2. Use "quoted phrases" for exact position matching: "infinite scroll" requires adjacent words in order.
3. Combine words and phrases for mixed queries: middleware "rate limit".
4. Use multiple queries for OR logic: queries=["authentication", "middleware"].

Artisan

• Run Artisan commands directly via the command line (e.g., php artisan route:list). Use php artisan list to discover available commands and php artisan [command] --help to check parameters.
• Inspect routes with php artisan route:list. Filter with: --method=GET, --name=users, --path=api, --except-vendor, --only-vendor.
• Read configuration values using dot notation: php artisan config:show app.name, php artisan config:show database.default. Or read config files directly from the config/ directory.
• To check environment variables, read the .env file directly.

Tinker

• Execute PHP in app context for debugging and testing code. Do not create models without user approval, prefer tests with factories instead. Prefer existing Artisan commands over custom tinker code.
• Always use single quotes to prevent shell expansion: php artisan tinker --execute 'Your::code();'
  • Double quotes for PHP strings inside: php artisan tinker --execute 'User::where("active", true)->count();'

=== php rules ===

PHP

• Always use curly braces for control structures, even for single-line bodies.
• Use PHP 8 constructor property promotion: public function __construct(public GitHub $github) { }. Do not leave empty zero-parameter __construct() methods unless the constructor is private.
• Use explicit return type declarations and type hints for all method parameters: function isAccessible(User $user, ?string $path = null): bool
• Follow existing application Enum naming conventions.
• Prefer PHPDoc blocks over inline comments. Only add inline comments for exceptionally complex logic.
• Use array shape type definitions in PHPDoc blocks.

=== herd rules ===

Laravel Herd

• The application is served by Laravel Herd at https?://[kebab-case-project-dir].test. Use the get-absolute-url tool to generate valid URLs. Never run commands to serve the site. It is always available.
• Use the herd CLI to manage services, PHP versions, and sites (e.g. herd sites, herd services:start <service>, herd php:list). Run herd list to discover all available commands.

=== tests rules ===

Test Enforcement

• Every change must be programmatically tested. Write a new test or update an existing test, then run the affected tests to make sure they pass.
• Run the minimum number of tests needed to ensure code quality and speed. Use php artisan test --compact with a specific filename or filter.

=== laravel/core rules ===

Do Things the Laravel Way

• Use php artisan make: commands to create new files (i.e. migrations, controllers, models, etc.). You can list available Artisan commands using php artisan list and check their parameters with php artisan [command] --help.
• If you're creating a generic PHP class, use php artisan make:class.
• Pass --no-interaction to all Artisan commands to ensure they work without user input. You should also pass the correct --options to ensure correct behavior.

Model Creation

• When creating new models, create useful factories and seeders for them too. Ask the user if they need any other things, using php artisan make:model --help to check the available options.

APIs & Eloquent Resources

• For APIs, default to using Eloquent API Resources and API versioning unless existing API routes do not, then you should follow existing application convention.

URL Generation

• When generating links to other pages, prefer named routes and the route() function.

Testing

• When creating models for tests, use the factories for the models. Check if the factory has custom states that can be used before manually setting up the model.
• Faker: Use methods such as $this->faker->word() or fake()->randomDigit(). Follow existing conventions whether to use $this->faker or fake().
• When creating tests, make use of php artisan make:test [options] {name} to create a feature test, and pass --unit to create a unit test. Most tests should be feature tests.

Vite Error

• If you receive an "Illuminate\Foundation\ViteException: Unable to locate file in Vite manifest" error, you can run npm run build or ask the user to run npm run dev or composer run dev.

=== livewire/core rules ===

Livewire

• Livewire allow to build dynamic, reactive interfaces in PHP without writing JavaScript.
• You can use Alpine.js for client-side interactions instead of JavaScript frameworks.
• Keep state server-side so the UI reflects it. Validate and authorize in actions as you would in HTTP requests.

=== pint/core rules ===

Laravel Pint Code Formatter

• If you have modified any PHP files, you must run vendor/bin/pint --dirty --format agent before finalizing changes to ensure your code matches the project's expected style.
• Do not run vendor/bin/pint --test --format agent, simply run vendor/bin/pint --format agent to fix any formatting issues.

=== pest/core rules ===

Pest

• This project uses Pest for testing. Create tests: php artisan make:test --pest {name}.
• Run tests: php artisan test --compact or filter: php artisan test --compact --filter=testName.
• Do NOT delete tests without approval.

=== filament/filament rules ===

Filament

• Filament is used by this application. Follow the existing conventions for how and where it is implemented.
• Filament is a Server-Driven UI (SDUI) framework for Laravel that lets you define user interfaces in PHP using structured configuration objects. Built on Livewire, Alpine.js, and Tailwind CSS.
• Use the search-docs tool for official documentation on Artisan commands, code examples, testing, relationships, and idiomatic practices. If search-docs is unavailable, refer to https://filamentphp.com/docs.

Artisan

• Always use Filament-specific Artisan commands to create files. Find available commands with the list-artisan-commands tool, or run php artisan --help.
• Always inspect required options before running a command, and always pass --no-interaction.

Patterns

Always use static make() methods to initialize components. Most configuration methods accept a Closure for dynamic values.

Use Get $get to read other form field values for conditional logic:

use Filament\Forms\Components\Select; use Filament\Forms\Components\TextInput; use Filament\Schemas\Components\Utilities\Get;

Select::make('type') ->options(CompanyType::class) ->required() ->live(),

TextInput::make('company_name') ->required() ->visible(fn (Get $get): bool => $get('type') === 'business'),

Use state() with a Closure to compute derived column values:

use Filament\Tables\Columns\TextColumn;

TextColumn::make('full_name') ->state(fn (User $record): string => "{$record->first_name} {$record->last_name}"),

Actions encapsulate a button with an optional modal form and logic:

use Filament\Actions\Action; use Filament\Forms\Components\TextInput;

Action::make('updateEmail') ->schema([ TextInput::make('email') ->email() ->required(), ]) ->action(fn (array $data, User $record) => $record->update($data))

Testing

Always authenticate before testing panel functionality. Filament uses Livewire, so use Livewire::test() or livewire() (available when pestphp/pest-plugin-livewire is in composer.json):

use function Pest\Livewire\livewire;

livewire(ListUsers::class) ->assertCanSeeTableRecords($users) ->searchTable($users->first()->name) ->assertCanSeeTableRecords($users->take(1)) ->assertCanNotSeeTableRecords($users->skip(1));

use function Pest\Laravel\assertDatabaseHas; use function Pest\Livewire\livewire;

livewire(CreateUser::class) ->fillForm([ 'name' => 'Test', 'email' => 'test@example.com', ]) ->call('create') ->assertNotified() ->assertRedirect();

assertDatabaseHas(User::class, [ 'name' => 'Test', 'email' => 'test@example.com', ]);

use function Pest\Livewire\livewire;

livewire(CreateUser::class) ->fillForm([ 'name' => null, 'email' => 'invalid-email', ]) ->call('create') ->assertHasFormErrors([ 'name' => 'required', 'email' => 'email', ]) ->assertNotNotified();

use Filament\Actions\DeleteAction; use function Pest\Livewire\livewire;

livewire(EditUser::class, ['record' => $user->id]) ->callAction(DeleteAction::class) ->assertNotified() ->assertRedirect();

use Filament\Actions\Testing\TestAction; use function Pest\Livewire\livewire;

livewire(ListUsers::class) ->callAction(TestAction::make('promote')->table($user), [ 'role' => 'admin', ]) ->assertNotified();

Correct Namespaces

• Form fields (TextInput, Select, etc.): Filament\Forms\Components\
• Infolist entries (TextEntry, IconEntry, etc.): Filament\Infolists\Components\
• Layout components (Grid, Section, Fieldset, Tabs, Wizard, etc.): Filament\Schemas\Components\
• Schema utilities (Get, Set, etc.): Filament\Schemas\Components\Utilities\
• Actions (DeleteAction, CreateAction, etc.): Filament\Actions\. Never use Filament\Tables\Actions\, Filament\Forms\Actions\, or any other sub-namespace for actions.
• Icons: Filament\Support\Icons\Heroicon enum (e.g., Heroicon::PencilSquare)

Common Mistakes

• Never assume public file visibility. File visibility is private by default. Always use ->visibility('public') when public access is needed.
• Never assume full-width layout. Grid, Section, and Fieldset do not span all columns by default. Explicitly set column spans when needed.