initial commit

2025-06-13 18:20:45 +02:00 · 2025-06-13 18:20:45 +02:00 · 5cac1183fc
commit 5cac1183fc
82 changed files with 9369 additions and 0 deletions
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,44 @@
+# Git
+.git
+.gitignore
+
+# Documentation
+README.md
+documentation/
+
+# Docker files
+docker/Dockerfile
+docker-compose.yml
+.dockerignore
+
+# Environment files
+.env
+.env.example
+.env.docker
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Node modules (if any)
+node_modules/
+npm-debug.log
+
+# Temporary files
+tmp/
+temp/
+
+# Logs
+*.log
+storage/logs/*
--- a/.editorconfig
+++ b/.editorconfig
@ -0,0 +1,341 @@
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = false
+max_line_length = 120
+tab_width = 4
+ij_continuation_indent_size = 8
+ij_formatter_off_tag = @formatter:off
+ij_formatter_on_tag = @formatter:on
+ij_formatter_tags_enabled = true
+ij_smart_tabs = false
+ij_visual_guides = none
+ij_wrap_on_typing = false
+
+[.editorconfig]
+ij_editorconfig_align_group_field_declarations = false
+ij_editorconfig_space_after_colon = false
+ij_editorconfig_space_after_comma = true
+ij_editorconfig_space_before_colon = false
+ij_editorconfig_space_before_comma = false
+ij_editorconfig_spaces_around_assignment_operators = true
+
+[{*.bash,*.sh,*.zsh}]
+indent_size = 2
+tab_width = 2
+ij_shell_binary_ops_start_line = false
+ij_shell_keep_column_alignment_padding = false
+ij_shell_minify_program = false
+ij_shell_redirect_followed_by_space = false
+ij_shell_switch_cases_indented = false
+ij_shell_use_unix_line_separator = true
+
+[{*.ctp,*.hphp,*.inc,*.module,*.php,*.php4,*.php5,*.phtml}]
+ij_continuation_indent_size = 4
+ij_php_align_assignments = false
+ij_php_align_class_constants = false
+ij_php_align_enum_cases = false
+ij_php_align_group_field_declarations = false
+ij_php_align_inline_comments = false
+ij_php_align_key_value_pairs = true
+ij_php_align_match_arm_bodies = false
+ij_php_align_multiline_array_initializer_expression = true
+ij_php_align_multiline_binary_operation = false
+ij_php_align_multiline_chained_methods = true
+ij_php_align_multiline_extends_list = true
+ij_php_align_multiline_for = true
+ij_php_align_multiline_parameters = false
+ij_php_align_multiline_parameters_in_calls = false
+ij_php_align_multiline_ternary_operation = true
+ij_php_align_named_arguments = false
+ij_php_align_phpdoc_comments = true
+ij_php_align_phpdoc_param_names = true
+ij_php_anonymous_brace_style = end_of_line
+ij_php_api_weight = 28
+ij_php_array_initializer_new_line_after_left_brace = true
+ij_php_array_initializer_right_brace_on_new_line = true
+ij_php_array_initializer_wrap = on_every_item
+ij_php_assignment_wrap = normal
+ij_php_attributes_wrap = normal
+ij_php_author_weight = 28
+ij_php_binary_operation_sign_on_next_line = false
+ij_php_binary_operation_wrap = normal
+ij_php_blank_lines_after_class_header = 0
+ij_php_blank_lines_after_function = 1
+ij_php_blank_lines_after_imports = 1
+ij_php_blank_lines_after_opening_tag = 1
+ij_php_blank_lines_after_package = 1
+ij_php_blank_lines_around_class = 1
+ij_php_blank_lines_around_constants = 0
+ij_php_blank_lines_around_enum_cases = 0
+ij_php_blank_lines_around_field = 0
+ij_php_blank_lines_around_method = 1
+ij_php_blank_lines_before_class_end = 0
+ij_php_blank_lines_before_imports = 1
+ij_php_blank_lines_before_method_body = 0
+ij_php_blank_lines_before_package = 1
+ij_php_blank_lines_before_return_statement = 1
+ij_php_blank_lines_between_imports = 1
+ij_php_block_brace_style = end_of_line
+ij_php_call_parameters_new_line_after_left_paren = true
+ij_php_call_parameters_right_paren_on_new_line = true
+ij_php_call_parameters_wrap = on_every_item
+ij_php_catch_on_new_line = false
+ij_php_category_weight = 28
+ij_php_class_brace_style = next_line
+ij_php_comma_after_last_argument = true
+ij_php_comma_after_last_array_element = true
+ij_php_comma_after_last_closure_use_var = true
+ij_php_comma_after_last_match_arm = true
+ij_php_comma_after_last_parameter = true
+ij_php_concat_spaces = false
+ij_php_copyright_weight = 28
+ij_php_deprecated_weight = 28
+ij_php_do_while_brace_force = always
+ij_php_else_if_style = combine
+ij_php_else_on_new_line = false
+ij_php_example_weight = 28
+ij_php_extends_keyword_wrap = normal
+ij_php_extends_list_wrap = normal
+ij_php_fields_default_visibility = private
+ij_php_filesource_weight = 28
+ij_php_finally_on_new_line = false
+ij_php_for_brace_force = always
+ij_php_for_statement_new_line_after_left_paren = true
+ij_php_for_statement_right_paren_on_new_line = true
+ij_php_for_statement_wrap = on_every_item
+ij_php_force_empty_methods_in_one_line = true
+ij_php_force_short_declaration_array_style = true
+ij_php_getters_setters_naming_style = camel_case
+ij_php_getters_setters_order_style = getters_first
+ij_php_global_weight = 28
+ij_php_group_use_wrap = on_every_item
+ij_php_if_brace_force = always
+ij_php_if_lparen_on_next_line = false
+ij_php_if_rparen_on_next_line = false
+ij_php_ignore_weight = 28
+ij_php_import_sorting = alphabetic
+ij_php_indent_break_from_case = true
+ij_php_indent_case_from_switch = true
+ij_php_indent_code_in_php_tags = false
+ij_php_internal_weight = 28
+ij_php_keep_blank_lines_after_lbrace = 0
+ij_php_keep_blank_lines_before_right_brace = 0
+ij_php_keep_blank_lines_in_code = 2
+ij_php_keep_blank_lines_in_declarations = 2
+ij_php_keep_control_statement_in_one_line = true
+ij_php_keep_first_column_comment = true
+ij_php_keep_indents_on_empty_lines = false
+ij_php_keep_line_breaks = false
+ij_php_keep_rparen_and_lbrace_on_one_line = true
+ij_php_keep_simple_classes_in_one_line = true
+ij_php_keep_simple_methods_in_one_line = true
+ij_php_lambda_brace_style = end_of_line
+ij_php_license_weight = 28
+ij_php_line_comment_add_space = false
+ij_php_line_comment_at_first_column = true
+ij_php_link_weight = 28
+ij_php_lower_case_boolean_const = true
+ij_php_lower_case_keywords = true
+ij_php_lower_case_null_const = true
+ij_php_method_brace_style = end_of_line
+ij_php_method_call_chain_wrap = on_every_item
+ij_php_method_parameters_new_line_after_left_paren = true
+ij_php_method_parameters_right_paren_on_new_line = true
+ij_php_method_parameters_wrap = on_every_item
+ij_php_method_weight = 28
+ij_php_modifier_list_wrap = false
+ij_php_multiline_chained_calls_semicolon_on_new_line = false
+ij_php_namespace_brace_style = 1
+ij_php_new_line_after_php_opening_tag = true
+ij_php_null_type_position = in_the_end
+ij_php_package_weight = 28
+ij_php_param_weight = 0
+ij_php_parameters_attributes_wrap = normal
+ij_php_parentheses_expression_new_line_after_left_paren = false
+ij_php_parentheses_expression_right_paren_on_new_line = false
+ij_php_phpdoc_blank_line_before_tags = false
+ij_php_phpdoc_blank_lines_around_parameters = false
+ij_php_phpdoc_keep_blank_lines = false
+ij_php_phpdoc_param_spaces_between_name_and_description = 1
+ij_php_phpdoc_param_spaces_between_tag_and_type = 1
+ij_php_phpdoc_param_spaces_between_type_and_name = 1
+ij_php_phpdoc_use_fqcn = true
+ij_php_phpdoc_wrap_long_lines = true
+ij_php_place_assignment_sign_on_next_line = false
+ij_php_place_parens_for_constructor = 0
+ij_php_property_read_weight = 28
+ij_php_property_weight = 28
+ij_php_property_write_weight = 28
+ij_php_return_type_on_new_line = false
+ij_php_return_weight = 1
+ij_php_see_weight = 28
+ij_php_since_weight = 28
+ij_php_sort_phpdoc_elements = true
+ij_php_space_after_colon = true
+ij_php_space_after_colon_in_enum_backed_type = true
+ij_php_space_after_colon_in_named_argument = true
+ij_php_space_after_colon_in_return_type = true
+ij_php_space_after_comma = true
+ij_php_space_after_for_semicolon = true
+ij_php_space_after_quest = true
+ij_php_space_after_type_cast = false
+ij_php_space_after_unary_not = false
+ij_php_space_before_array_initializer_left_brace = false
+ij_php_space_before_catch_keyword = true
+ij_php_space_before_catch_left_brace = true
+ij_php_space_before_catch_parentheses = true
+ij_php_space_before_class_left_brace = true
+ij_php_space_before_closure_left_parenthesis = true
+ij_php_space_before_colon = true
+ij_php_space_before_colon_in_enum_backed_type = false
+ij_php_space_before_colon_in_named_argument = false
+ij_php_space_before_colon_in_return_type = false
+ij_php_space_before_comma = false
+ij_php_space_before_do_left_brace = true
+ij_php_space_before_else_keyword = true
+ij_php_space_before_else_left_brace = true
+ij_php_space_before_finally_keyword = true
+ij_php_space_before_finally_left_brace = true
+ij_php_space_before_for_left_brace = true
+ij_php_space_before_for_parentheses = true
+ij_php_space_before_for_semicolon = false
+ij_php_space_before_if_left_brace = true
+ij_php_space_before_if_parentheses = true
+ij_php_space_before_method_call_parentheses = false
+ij_php_space_before_method_left_brace = true
+ij_php_space_before_method_parentheses = false
+ij_php_space_before_quest = true
+ij_php_space_before_short_closure_left_parenthesis = false
+ij_php_space_before_switch_left_brace = true
+ij_php_space_before_switch_parentheses = true
+ij_php_space_before_try_left_brace = true
+ij_php_space_before_unary_not = false
+ij_php_space_before_while_keyword = true
+ij_php_space_before_while_left_brace = true
+ij_php_space_before_while_parentheses = true
+ij_php_space_between_ternary_quest_and_colon = false
+ij_php_spaces_around_additive_operators = true
+ij_php_spaces_around_arrow = false
+ij_php_spaces_around_assignment_in_declare = true
+ij_php_spaces_around_assignment_operators = true
+ij_php_spaces_around_bitwise_operators = true
+ij_php_spaces_around_equality_operators = true
+ij_php_spaces_around_logical_operators = true
+ij_php_spaces_around_multiplicative_operators = true
+ij_php_spaces_around_null_coalesce_operator = true
+ij_php_spaces_around_pipe_in_union_type = false
+ij_php_spaces_around_relational_operators = true
+ij_php_spaces_around_shift_operators = true
+ij_php_spaces_around_unary_operator = false
+ij_php_spaces_around_var_within_brackets = false
+ij_php_spaces_within_array_initializer_braces = false
+ij_php_spaces_within_brackets = false
+ij_php_spaces_within_catch_parentheses = false
+ij_php_spaces_within_for_parentheses = false
+ij_php_spaces_within_if_parentheses = false
+ij_php_spaces_within_method_call_parentheses = false
+ij_php_spaces_within_method_parentheses = false
+ij_php_spaces_within_parentheses = false
+ij_php_spaces_within_short_echo_tags = true
+ij_php_spaces_within_switch_parentheses = false
+ij_php_spaces_within_while_parentheses = false
+ij_php_special_else_if_treatment = true
+ij_php_subpackage_weight = 28
+ij_php_ternary_operation_signs_on_next_line = false
+ij_php_ternary_operation_wrap = on_every_item
+ij_php_throws_weight = 2
+ij_php_todo_weight = 28
+ij_php_treat_multiline_arrays_and_lambdas_multiline = false
+ij_php_unknown_tag_weight = 28
+ij_php_upper_case_boolean_const = false
+ij_php_upper_case_null_const = false
+ij_php_uses_weight = 28
+ij_php_var_weight = 28
+ij_php_variable_naming_style = camel_case
+ij_php_version_weight = 28
+ij_php_while_brace_force = always
+ij_php_while_on_new_line = false
+
+[{*.har,*.jsb2,*.jsb3,*.json,.babelrc,.eslintrc,.prettierrc,.stylelintrc,bowerrc,composer.lock,jest.config}]
+ij_continuation_indent_size = 4
+ij_json_array_wrapping = on_every_item
+ij_json_keep_blank_lines_in_code = 0
+ij_json_keep_indents_on_empty_lines = false
+ij_json_keep_line_breaks = true
+ij_json_keep_trailing_comma = false
+ij_json_object_wrapping = on_every_item
+ij_json_property_alignment = do_not_align
+ij_json_space_after_colon = true
+ij_json_space_after_comma = true
+ij_json_space_before_colon = false
+ij_json_space_before_comma = false
+ij_json_spaces_within_braces = false
+ij_json_spaces_within_brackets = false
+ij_json_wrap_long_lines = false
+
+[{*.htm,*.html,*.ng,*.sht,*.shtm,*.shtml}]
+ij_html_add_new_line_before_tags = body, div, p, form, h1, h2, h3
+ij_html_align_attributes = true
+ij_html_align_text = false
+ij_html_attribute_wrap = normal
+ij_html_block_comment_add_space = false
+ij_html_block_comment_at_first_column = true
+ij_html_do_not_align_children_of_min_lines = 0
+ij_html_do_not_break_if_inline_tags = title, h1, h2, h3, h4, h5, h6, p
+ij_html_do_not_indent_children_of_tags = html, body, thead, tbody, tfoot
+ij_html_enforce_quotes = false
+ij_html_inline_tags = a, abbr, acronym, b, basefont, bdo, big, br, cite, cite, code, dfn, em, font, i, img, input, kbd, label, q, s, samp, select, small, span, strike, strong, sub, sup, textarea, tt, u, var
+ij_html_keep_blank_lines = 2
+ij_html_keep_indents_on_empty_lines = false
+ij_html_keep_line_breaks = true
+ij_html_keep_line_breaks_in_text = true
+ij_html_keep_whitespaces = false
+ij_html_keep_whitespaces_inside = span, pre, textarea
+ij_html_line_comment_at_first_column = true
+ij_html_new_line_after_last_attribute = never
+ij_html_new_line_before_first_attribute = never
+ij_html_quote_style = double
+ij_html_remove_new_line_before_tags = br
+ij_html_space_after_tag_name = false
+ij_html_space_around_equality_in_attribute = false
+ij_html_space_inside_empty_tag = false
+ij_html_text_wrap = normal
+
+[{*.http,*.rest}]
+indent_size = 0
+ij_continuation_indent_size = 4
+ij_http request_call_parameters_wrap = normal
+
+[{*.markdown,*.md}]
+ij_continuation_indent_size = 4
+ij_markdown_force_one_space_after_blockquote_symbol = true
+ij_markdown_force_one_space_after_header_symbol = true
+ij_markdown_force_one_space_after_list_bullet = true
+ij_markdown_force_one_space_between_words = true
+ij_markdown_format_tables = true
+ij_markdown_insert_quote_arrows_on_wrap = true
+ij_markdown_keep_indents_on_empty_lines = false
+ij_markdown_keep_line_breaks_inside_text_blocks = true
+ij_markdown_max_lines_around_block_elements = 1
+ij_markdown_max_lines_around_header = 1
+ij_markdown_max_lines_between_paragraphs = 1
+ij_markdown_min_lines_around_block_elements = 1
+ij_markdown_min_lines_around_header = 2
+ij_markdown_min_lines_between_paragraphs = 1
+ij_markdown_wrap_text_if_long = true
+ij_markdown_wrap_text_inside_blockquotes = true
+
+[{*.yaml,*.yml}]
+ij_yaml_align_values_properties = do_not_align
+ij_yaml_autoinsert_sequence_marker = true
+ij_yaml_block_mapping_on_new_line = false
+ij_yaml_indent_sequence_value = true
+ij_yaml_keep_indents_on_empty_lines = false
+ij_yaml_keep_line_breaks = true
+ij_yaml_sequence_on_new_line = false
+ij_yaml_space_before_colon = false
+ij_yaml_spaces_within_braces = true
+ij_yaml_spaces_within_brackets = true
--- a/.env.docker
+++ b/.env.docker
@ -0,0 +1,22 @@
+# Docker Environment Configuration for Foundation
+
+# Application Configuration
+APP_NAME="Foundation Docker"
+APP_URL="http://localhost:8000"
+APP_DEBUG=true
+
+# Database Configuration (Docker services)
+DB_HOST=db
+DB_PORT=3306
+DB_DATABASE=foundation
+DB_USERNAME=foundation_user
+DB_PASSWORD=foundation_password
+DB_CHARSET=utf8mb4
+
+# Session Configuration
+SESSION_NAME=foundation_session
+SESSION_LIFETIME=7200
+
+# Xdebug Configuration (automatically set in Docker)
+XDEBUG_MODE=debug
+XDEBUG_CONFIG=client_host=host.docker.internal
--- a/.env.example
+++ b/.env.example
@ -0,0 +1,16 @@
+# Application Configuration
+APP_NAME="Foundation"
+APP_URL="http://localhost:8000"
+APP_DEBUG=true
+
+# Database Configuration
+DB_HOST=localhost
+DB_PORT=3306
+DB_DATABASE=foundation
+DB_USERNAME=foundation_user
+DB_PASSWORD=foundation_password
+DB_CHARSET=utf8mb4
+
+# Session Configuration
+SESSION_NAME=foundation_session
+SESSION_LIFETIME=7200
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,11 @@
+.idea/
+storage/logs/
+vendor/
+.deptrac.cache
+.env
+
+# Test artifacts
+.phpunit.cache/
+coverage-html/
+.phpunit.result.cache
+phpunit-junit.xml
--- a/104
+++ b/104
@ -0,0 +1,104 @@
+# Makefile for PHP Base Framework
+# Wraps composer commands to run via Docker
+
+.PHONY: help \
+		install \
+		dump-autoload \
+		up \
+		down \
+		shell \
+		test \
+		test-coverage \
+		test-unit \
+		test-integration \
+		phpstan \
+		phpstan-baseline \
+		deptrac \
+		deptrac-baseline \
+		rector \
+		rector-fix \
+		static-analysis
+
+# Default target
+help:
+	@echo "Available commands:"
+	@echo "  Docker Management:"
+	@echo "    up              - Start Docker environment"
+	@echo "    down            - Stop Docker environment"
+	@echo "    shell           - Access container shell"
+	@echo ""
+	@echo "  Composer Commands:"
+	@echo "    install         - Install dependencies"
+	@echo "    dump-autoload   - Refresh autoload files"
+	@echo ""
+	@echo "  Testing:"
+	@echo "    test            - Run all tests"
+	@echo "    test-coverage   - Run tests with coverage report"
+	@echo "    test-unit       - Run unit tests only"
+	@echo "    test-integration - Run integration tests only"
+	@echo ""
+	@echo "  Static Analysis:"
+	@echo "    phpstan         - Run PHPStan analysis"
+	@echo "    phpstan-baseline - Generate PHPStan baseline"
+	@echo "    deptrac         - Run Deptrac layer analysis"
+	@echo "    deptrac-baseline - Generate Deptrac baseline"
+	@echo "    static-analysis - Run both PHPStan and Deptrac"
+	@echo ""
+	@echo "  Code Quality:"
+	@echo "    rector          - Preview Rector changes (dry-run)"
+	@echo "    rector-fix      - Apply Rector changes"
+
+# Docker Management
+up:
+	export USER_ID=$$(id -u) && export GROUP_ID=$$(id -g) && docker-compose up -d --build
+
+down:
+	docker-compose down
+
+shell:
+	docker-compose exec app bash
+
+
+# Composer Commands
+install:
+	docker-compose exec app composer install
+
+dump-autoload:
+	docker-compose exec app composer dump-autoload
+
+# Testing Commands
+test:
+	docker-compose exec app composer test
+
+test-coverage:
+	docker-compose exec app composer test-coverage
+
+test-unit:
+	docker-compose exec app composer test-unit
+
+test-integration:
+	docker-compose exec app composer test-integration
+
+
+# Static Analysis Commands
+phpstan:
+	docker-compose exec app composer phpstan
+
+phpstan-baseline:
+	docker-compose exec app composer phpstan-baseline
+
+deptrac:
+	docker-compose exec app composer deptrac
+
+deptrac-baseline:
+	docker-compose exec app composer deptrac-baseline
+
+static-analysis: phpstan deptrac
+
+
+# Code Quality Commands
+rector:
+	docker-compose exec app composer rector
+
+rector-fix:
+	docker-compose exec app composer rector-fix
--- a/README.md
+++ b/README.md
@ -0,0 +1,201 @@
+# Foundation - PHP Framework
+
+A small PHP framework built with Domain-Driven Design principles, Slim microframework, and dependency injection.
+
+## Features
+
+- **Clean Architecture**: Separation of concerns with Domain, Application, and Infrastructure layers
+- **Domain-Driven Design**: Proper domain modeling with entities, value objects, and repositories
+- **Dependency Injection**: PHP-DI container for flexible service management
+- **Modular System**: Self-contained modules with auto-discovery service providers
+- **HTTP Framework**: Slim 4 for robust request handling
+- **Attribute-Based Routing**: PHP 8+ attributes for clean route definitions
+- **Database Layer**: PDO with repository pattern and CQRS separation
+- **Docker Support**: Complete development environment with PHP, MySQL, and Xdebug
+
+## Quick Start
+
+### Docker Development Environment (Recommended)
+
+1. **Prerequisites**: Docker and Docker Compose installed
+
+1. **Setup**:
+   ```bash
+   git clone git@github.com:ItsAMirko/foundation.git foundation
+   cd foundation
+   
+   # Start development environment (recommended)
+   make up
+   make install
+   
+   # Alternative: automated setup script
+   ./docker-start.sh
+   ```
+
+1. **Access Application**:
+    - **Web Interface**: http://localhost:8000
+    - **phpMyAdmin**: http://localhost:8080
+
+### Local Development
+
+1. **Requirements**: PHP 8.1+, MySQL 8.0+, Composer
+
+1. **Setup**:
+   ```bash
+   composer install
+   cp .env.example .env
+   # Configure database settings in .env
+   mysql < database/schema.sql
+   ```
+
+1. **Run**:
+   ```bash
+   php -S localhost:8000 -t public/
+   ```
+
+## Architecture
+
+### Core Framework Structure
+
+```
+src/Core/
+├── Application/
+│   ├── Application.php                   # Main application orchestrator
+│   ├── Kernel/HttpKernel.php             # HTTP request handling
+│   ├── DependencyInjection/              # DI container setup
+│   ├── Bootstrapper/                     # Application setup components
+│   └── ServiceProvider/                  # Service provider abstractions
+├── ErrorHandling/                        # Error handling and responses
+├── Logging/                              # Logging infrastructure
+├── Session/                              # Session management
+└── Cache/                                # Caching interfaces
+```
+
+### Module Structure (Example: WelcomeScreen)
+
+```
+src/Modules/WelcomeScreen/
+├── Application/                          # Use cases and application services
+│   ├── FetchAllActivities/
+│   └── SetAllActivitiesAsRead/
+├── Domain/                               # Business logic and domain models
+│   ├── Activity.php                      # Domain entity
+│   └── ActivityRepositoryInterface.php
+├── Infrastructure/                       # External concerns
+│   ├── Api/                              # API controllers
+│   ├── Web/                              # Web controllers  
+│   └── Database/                         # Database implementations
+└── WelcomeScreenServiceProvider.php      # Module service registration
+```
+
+## Key Concepts
+
+### Service Providers
+
+Each module has a Service Provider that:
+
+- Registers services in the DI container
+- Bootstraps module-specific functionality
+- Registers HTTP routes
+- Can handle future event registration
+
+### Bootstrappers
+
+Framework components that set up the application:
+
+- `ConfigInitializer` - Environment configuration
+- `DatabaseInitializer` - Database connections
+- `SessionInitializer` - Session management
+- `ModuleLoader` - Auto-discovers and loads module service providers
+
+### Domain-Driven Design
+
+- **Entities**: Business objects with identity
+- **Value Objects**: Immutable data containers
+- **Repositories**: Data access abstractions
+- **Application Services**: Use case implementations
+- **Domain Services**: Business logic coordination
+
+## Development
+
+### Development Commands
+
+Use the included Makefile for streamlined development:
+
+```bash
+# View all available commands
+make help
+
+# Environment management
+make up                     # Start Docker environment
+make down                   # Stop Docker environment
+make shell                  # Access container shell
+
+# Dependencies
+make install                # Install composer dependencies
+make dump-autoload          # Refresh autoload files
+
+# Testing
+make test                   # Run all tests
+make test-unit             # Run unit tests only
+make test-integration      # Run integration tests only
+make test-coverage         # Run tests with coverage report
+
+# Code Quality
+make phpstan               # Run PHPStan static analysis
+make deptrac               # Run Deptrac layer analysis
+make static-analysis       # Run both PHPStan and Deptrac
+make rector                # Preview Rector changes
+make rector-fix            # Apply Rector changes
+```
+
+### Docker Environment
+
+See [Docker Setup Documentation](documentation/docker-setup.md) for detailed Docker usage.
+
+### Adding New Modules
+
+1. Create module directory: `src/Modules/<module-name>/`
+2. Implement Domain, Application, and Infrastructure layers
+3. Create `<module-name>ServiceProvider.php`
+4. The ModuleLoader will automatically discover and register it
+
+### Debugging
+
+With Docker and Xdebug configured:
+
+- Set breakpoints in your IDE
+- Access the application through http://localhost:8000
+- Debug sessions will automatically connect
+
+## Documentation
+
+### Architecture & Design
+
+- [Application Core](documentation/application-core.md) - Framework Architecture Overview
+- [Application Layers](documentation/application-layers.md) - Application Layer Guide
+- [Attribute-Based Routing](documentation/attribute-routing.md) - Modern PHP 8+ Routing with Attributes
+- [Docker Setup](documentation/docker-setup.md) - Docker Setup Guide
+- [Dependency Injection](documentation/dependency-injection.md) - Dependency Injection Guide
+- [Unit of Work](documentation/unit-of-work.md) - Unit of Work Guide
+
+## Requirements
+
+- PHP 8.1+
+- MySQL 8.0+ / MariaDB 10.3+
+- Composer
+- Docker & Docker Compose (for development environment)
+
+## Dependencies
+
+### Core Framework
+
+- **slim/slim**: ^4.12 - HTTP microframework
+- **php-di/php-di**: ^7.0 - Dependency injection container
+- **monolog/monolog**: ^3.0 - Logging library
+- **vlucas/phpdotenv**: ^5.5 - Environment configuration
+
+### Development Tools
+
+- **phpunit/phpunit**: ^10.0 - Testing framework
+- **phpstan/phpstan**: ^1.10 - Static analysis
--- a/composer.json
+++ b/composer.json
@ -0,0 +1,61 @@
+{
+    "name": "foundation/framework",
+    "description": "A generic PHP framework based on Slim and DI containers",
+    "type": "project",
+    "require": {
+        "php": ">=8.1",
+        "ext-pdo": "*",
+        "monolog/monolog": "^3.0",
+        "php-di/php-di": "^7.0",
+        "psr/simple-cache": "^3.0",
+        "slim/psr7": "^1.6",
+        "slim/slim": "^4.12",
+        "vlucas/phpdotenv": "^5.5"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.0",
+        "phpstan/phpstan": "^1.10",
+        "phpstan/extension-installer": "^1.3",
+        "phpstan/phpstan-strict-rules": "^1.5",
+        "phpstan/phpstan-deprecation-rules": "^1.1",
+        "deptrac/deptrac": "^2.0",
+        "tomasvotruba/type-coverage": "^0.2",
+        "shipmonk/phpstan-rules": "^3.0",
+        "rector/rector": "^1.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Foundation\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Foundation\\Tests\\": "tests/"
+        }
+    },
+    "scripts": {
+        "test": "phpunit",
+        "test-coverage": "phpunit --coverage-html=coverage-html",
+        "test-unit": "phpunit --testsuite=Unit",
+        "test-integration": "phpunit --testsuite=Integration",
+        "phpstan": "phpstan analyse",
+        "phpstan-baseline": "phpstan analyse --generate-baseline",
+        "deptrac": "deptrac analyse",
+        "deptrac-baseline": "deptrac analyse --formatter=baseline --output=deptrac-baseline.yaml",
+        "rector": "rector process --dry-run",
+        "rector-fix": "rector process",
+        "static-analysis": [
+            "@phpstan",
+            "@deptrac"
+        ]
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "sort-packages": true,
+        "allow-plugins": {
+            "phpstan/extension-installer": true
+        }
+    },
+    "minimum-stability": "stable",
+    "prefer-stable": true
+}
--- a/composer.lock
+++ b/composer.lock
--- a/deptrac-baseline.yaml
+++ b/deptrac-baseline.yaml
@ -0,0 +1,6 @@
+deptrac:
+  skip_violations:
+    Foundation\Modules\WelcomeScreen\Infrastructure\Database\Command\SetAllActivitiesAsReadInDatabase:
+      - Foundation\Modules\WelcomeScreen\Domain\Activity
+    Foundation\Modules\WelcomeScreen\Infrastructure\Database\Query\FetchAllActivitiesFromDatabase:
+      - Foundation\Modules\WelcomeScreen\Domain\Activity
--- a/deptrac.yaml
+++ b/deptrac.yaml
@ -0,0 +1,95 @@
+deptrac:
+  paths:
+    - ./src
+  
+  exclude_files:
+    - '#.*test.*#'
+  
+  layers:
+    - name: Core
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Core\\\\.*/"
+    
+    - name: Domain
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Modules\\\\.*\\\\Domain\\\\.*/"
+    
+    - name: Application
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Modules\\\\.*\\\\Application\\\\.*/"
+    
+    - name: Repository
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Modules\\\\.*\\\\Infrastructure\\\\Database\\\\.*(?:Repository|Persister)$/"
+    
+    - name: Infrastructure
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Modules\\\\.*\\\\Infrastructure\\\\(?!Database\\\\.*(?:Repository|Persister)$).*/"
+    
+    - name: ServiceProvider
+      collectors:
+        - type: classNameRegex
+          value: "/^Foundation\\\\Modules\\\\.*\\\\.*ServiceProvider$/"
+  
+  ruleset:
+    # Core can be used by anyone
+    Core:
+      - Domain
+      - Application
+      - Repository
+      - Infrastructure
+      - ServiceProvider
+    
+    # Domain Layer: Must be completely independent
+    Domain: []
+    
+    # Application Layer: Can depend on Domain only
+    Application:
+      - Core
+      - Domain
+    
+    # Repository Layer: Can depend on Domain, Application, and Infrastructure (for implementing repository interfaces)
+    Repository:
+      - Core
+      - Domain
+      - Application
+      - Infrastructure
+    
+    # Infrastructure Layer: Can depend on Application and itself (no direct Domain access)
+    Infrastructure:
+      - Core
+      - Application
+    
+    # Service Providers can depend on all layers for registration
+    ServiceProvider:
+      - Core
+      - Domain
+      - Application
+      - Repository
+      - Infrastructure
+  
+  skip_violations:
+    # Baseline violations (existing code that needs refactoring)
+    Foundation\Modules\WelcomeScreen\Infrastructure\Database\Command\SetAllActivitiesAsReadInDatabase:
+      - Foundation\Modules\WelcomeScreen\Domain\Activity
+    Foundation\Modules\WelcomeScreen\Infrastructure\Database\Query\FetchAllActivitiesFromDatabase:
+      - Foundation\Modules\WelcomeScreen\Domain\Activity
+
+  formatters:
+    graphviz:
+      pointToGroups: true
+      groups:
+        Core:
+          - Core
+        Module_Layers:
+          - Domain
+          - Application
+          - Repository
+          - Infrastructure
+        Service_Registration:
+          - ServiceProvider
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -0,0 +1,70 @@
+services:
+  app:
+    build:
+      context: docker/
+      dockerfile: Dockerfile
+      args:
+        USER_ID: "${USER_ID:-1000}"
+        GROUP_ID: "${GROUP_ID:-1000}"
+    container_name: foundation-app
+    restart: unless-stopped
+    working_dir: /var/www/html
+    volumes:
+      - ./:/var/www/html:delegated
+      - ./docker/php/local.ini:/usr/local/etc/php/conf.d/local.ini
+    ports:
+      - "8000:80"
+    networks:
+      - foundation
+    depends_on:
+      - db
+    environment:
+      - DB_HOST=db
+      - DB_PORT=3306
+      - DB_DATABASE=foundation
+      - DB_USERNAME=foundation_user
+      - DB_PASSWORD=foundation_password
+      - XDEBUG_MODE=debug
+      - XDEBUG_CONFIG=client_host=host.docker.internal
+    command: apache2-foreground
+
+  db:
+    image: mysql:8.0
+    container_name: foundation-db
+    restart: unless-stopped
+    ports:
+      - "3306:3306"
+    environment:
+      MYSQL_DATABASE: foundation
+      MYSQL_USER: foundation_user
+      MYSQL_PASSWORD: foundation_password
+      MYSQL_ROOT_PASSWORD: root_password
+    volumes:
+      - db_data:/var/lib/mysql
+      - ./docker/mysql/schema.sql:/docker-entrypoint-initdb.d/01-schema.sql
+    networks:
+      - foundation
+
+  phpmyadmin:
+    image: phpmyadmin/phpmyadmin
+    container_name: foundation-phpmyadmin
+    restart: unless-stopped
+    ports:
+      - "8080:80"
+    environment:
+      PMA_HOST: db
+      PMA_PORT: 3306
+      PMA_USER: foundation_user
+      PMA_PASSWORD: foundation_password
+    networks:
+      - foundation
+    depends_on:
+      - db
+
+volumes:
+  db_data:
+    driver: local
+
+networks:
+  foundation:
+    driver: bridge
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@ -0,0 +1,56 @@
+FROM php:8.1-apache
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    libpng-dev \
+    libonig-dev \
+    libxml2-dev \
+    zip \
+    unzip \
+    libzip-dev \
+    sudo \
+    && docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd zip
+
+# Install Xdebug
+RUN pecl install xdebug \
+    && docker-php-ext-enable xdebug
+
+# Configure Xdebug
+RUN echo "xdebug.mode=debug" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.start_with_request=yes" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.client_host=host.docker.internal" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.client_port=9003" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.discover_client_host=1" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.idekey=PHPSTORM" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
+
+# Get latest Composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Configure Apache
+RUN a2enmod rewrite
+
+# Create a user with same UID as host user (will be overridden by docker-compose)
+ARG USER_ID=1000
+ARG GROUP_ID=1000
+RUN groupadd -g ${GROUP_ID} appuser && \
+    useradd -u ${USER_ID} -g appuser -m appuser && \
+    usermod -a -G www-data appuser
+
+# Set working directory
+WORKDIR /var/www/html
+
+# Copy Apache configuration
+COPY ./apache/000-default.conf /etc/apache2/sites-available/000-default.conf
+
+# Create directories and set permissions
+RUN mkdir -p /var/www/html/storage/logs /var/www/html/vendor \
+    && chown -R appuser:www-data /var/www/html \
+    && chmod -R 775 /var/www/html
+
+# Switch to app user
+USER appuser
+
+# Expose port 80
+EXPOSE 80
--- a/docker/apache/000-default.conf
+++ b/docker/apache/000-default.conf
@ -0,0 +1,13 @@
+<VirtualHost *:80>
+    ServerAdmin webmaster@localhost
+    DocumentRoot /var/www/html/public
+
+    <Directory /var/www/html/public>
+        Options Indexes FollowSymLinks
+        AllowOverride All
+        Require all granted
+    </Directory>
+
+    ErrorLog ${APACHE_LOG_DIR}/error.log
+    CustomLog ${APACHE_LOG_DIR}/access.log combined
+</VirtualHost>
--- a/docker/mysql/schema.sql
+++ b/docker/mysql/schema.sql
@ -0,0 +1,22 @@
+-- Foundation Database Schema
+
+CREATE DATABASE IF NOT EXISTS foundation;
+USE foundation;
+
+-- Activities table for the WelcomeScreen module
+CREATE TABLE activities (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    description TEXT NOT NULL,
+    is_read BOOLEAN DEFAULT FALSE,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+);
+
+-- Sample data
+INSERT INTO activities (title, description, is_read, created_at) VALUES
+('Welcome to Foundation', 'This is your first activity in the Foundation framework!', false, '2024-01-15 10:00:00'),
+('Framework Architecture', 'The framework follows Domain-Driven Design principles with clean architecture.', false, '2024-01-15 11:30:00'),
+('Module System', 'Each module is self-contained with Application, Domain, and Infrastructure layers.', true, '2024-01-15 12:15:00'),
+('API Endpoints', 'RESTful API endpoints are available for all major operations.', false, '2024-01-15 14:20:00'),
+('Database Integration', 'The framework uses PDO with prepared statements for secure database operations.', true, '2024-01-15 15:45:00');
--- a/docker/php/local.ini
+++ b/docker/php/local.ini
@ -0,0 +1,22 @@
+upload_max_filesize=40M
+post_max_size=40M
+memory_limit=256M
+max_execution_time=300
+max_input_vars=3000
+
+; Error reporting
+display_errors=On
+display_startup_errors=On
+error_reporting=E_ALL
+
+; Timezone
+date.timezone=UTC
+
+; Xdebug configuration
+xdebug.mode=debug
+xdebug.start_with_request=yes
+xdebug.client_host=host.docker.internal
+xdebug.client_port=9003
+xdebug.discover_client_host=1
+xdebug.idekey=PHPSTORM
+xdebug.log_level=0
--- a/documentation/application-core.md
+++ b/documentation/application-core.md
@ -0,0 +1,83 @@
+# What is an Application Core?
+
+The *application core* (or application) handles all processes that trigger specific functionalities and mechanics of the
+software, like showing the products page, registering a customer account, or placing an order. Because this software is
+a web-based application, the triggers are HTTP requests that will be interpreted and processed by internal components of
+the application. The following picture shows you the essential parts of the *application core*:
+
+```
+----------------------------------------------------------+
+|                 Application / IoC Container              |
+|                                                          |
+|  +-------------------------+  +-----------------------+  |
+|  |         Modules         |  |                       |  |
+|  |  +-------------------+  |  |        Domains        |  |
+|  |  |       Routes      |  |  |                       |  |
+|  |  +-------------------+  |  |                       |  |
+|  +-------------------------+  +-----------------------+  |
+|  +----------------------------------------------------+  |
+|  |             Framework / Core Components            |  |
+|  +----------------------------------------------------+  |
+|  +--------------+  +-----------------+  +-------------+  |
+|  |    Kernel    |  |                 |  |             |  |
+|  |  +--------+  |  |  bootstrappers  |  |   Service   |  |
+|  |  |  Slim  |  |  |                 |  |  Providers  |  |
+|  |  +--------+  |  |                 |  |             |  |
+|  +--------------+  +-----------------+  +-------------+  |
+----------------------------------------------------------+
+```
+
+# Kernel
+
+The *kernel* is the central component that delegates the start, execution, and finalisation of the application. In the
+starting process, it uses *bootstrappers* to set up the application and delegates to specific application services to
+handle incoming requests.
+
+The `HttpKernel` implementation is based on the microframework Slim. For execution, the processing of the HTTP request
+will be forwarded to Slim, which receives the incoming HTTP requests and starts the processing that handles these
+requests.
+
+Another example for a general use case for a *kernel* would be a CLI program.
+
+# Bootstrapper
+
+Besides the *kernel*, we have the *bootstrappers*, which set up the application itself. Each *bootstrapper* prepares a
+part of the application before any HTTP requests will be handled. Typical tasks of these *bootstrappers* are the
+registration of components, handling of HTTP sessions, or registration of routes and middlewares.
+
+# Service Providers
+
+The application is designed in a way that it acts as a DI Container; that allows an easy way of Inversion of Control and
+Dependency Injection. Having a DI Container means that every component or service class used to handle specific
+functionalities of the application needs to be registered. The container/application will generally arrange the
+instantiation of these components, services and classes by itself. The *service providers* are the parts of the
+application responsible for registering these components and services.
+
+# Modules
+
+After the application has received an incoming HTTP request and determines which module is responsible, a corresponding
+HTTP controller or action will be executed. These controllers or actions are part of the module. A single module only
+provides a fraction of the complete functionality. Therefore, it uses (and sometimes even contains) a domain.
+
+# Domains
+
+Domain is a term of the Domain-Driven Design and represents a part of the business logic. While an HTTP controller or
+other components of a module orchestrate processes, the domain contains the inner logic and model of the business
+itself.
+
+## Layer Dependencies
+
+Each module follows strict dependency rules across its three layers:
+
+- **Domain Layer**: Must be completely independent with no dependencies on other layers
+- **Application Layer**: Can depend on Domain and Infrastructure layers
+- **Infrastructure Layer**: Can only depend on itself, isolated from Application and Domain
+
+This architecture ensures the Domain remains pure business logic, the Application orchestrates use cases, and
+Infrastructure provides isolated external adapters. See [Application Layers](application-layers.md) for detailed
+dependency rules and examples.
+
+# Core Components / Framework
+
+The *core components* can be used by different *modules*. Systems for caching, logging, or internalization are examples
+forthese kind of components. They can be seen as the general framework for every module.
--- a/documentation/application-layers.md
+++ b/documentation/application-layers.md
@ -0,0 +1,80 @@
+# Application Layers
+
+This document describes the three-layer architecture used in each module and the strict dependency rules that must be
+followed.
+
+## Layer Overview
+
+Each module is organized into three distinct layers following Domain-Driven Design principles:
+
+```
+src/Modules/{module-name}/
+├── Domain/                # Pure business logic
+├── Application/           # Use cases and orchestration
+└── Infrastructure/        # External adapters and implementations
+```
+
+## Layer Descriptions
+
+### Domain Layer
+
+The **Domain** layer contains the core business logic and is the heart of the module. It includes:
+
+- **Entities**: Business objects with identity and lifecycle
+- **Value Objects**: Immutable data containers representing concepts
+- **Repository Interfaces**: Contracts for data access (no implementations)
+- **Domain Services**: Business logic that doesn't naturally fit in entities
+- **Domain Events**: Events representing business occurrences
+- **Exceptions**: Domain-specific business rule violations
+
+**Key Principle**: The Domain layer must be completely independent and have **no dependencies on any other layers**.
+
+### Application Layer
+
+The **Application** layer orchestrates business processes and coordinates between the domain and infrastructure. It
+includes:
+
+- **Use Cases/Application Services**: Specific business scenarios (e.g., FetchAllActivities)
+- **Application Events**: Events related to application processes
+- **DTOs**: Data transfer objects for communication between layers
+
+**Dependencies**: Can depend on **Domain** layer and itself only.
+
+### Infrastructure Layer
+
+The **Infrastructure** layer provides concrete implementations, external integrations, and adapters. It includes:
+
+- **Repository Implementations**: Concrete data access implementations
+- **API Controllers**: HTTP endpoint handlers
+- **Web Controllers**: Web interface handlers
+- **Command Handlers**: Process commands that change state
+- **Query Handlers**: Process queries that retrieve data
+- **Database Commands/Queries**: Specific data operations
+- **External Service Adapters**: Third-party service integrations
+- **Persistence Models**: Database-specific representations
+
+**Dependencies**: Can depend on **Application** layer and itself only.
+
+## Dependency Rules
+
+### Allowed Dependencies
+
+```
+- Domain (no dependencies)
+- Application ─── may depend ──→ Domain
+- Infrastructure ─── may depend ──→ Application
+```
+
+### What This Means
+
+1. **Domain** files cannot import or use anything from Application or Infrastructure
+2. **Application** files can import from Application and Domain only
+3. **Infrastructure** files can import from Infrastructure and Application only (not Domain directly)
+
+## Benefits of This Architecture
+
+1. **Domain Purity**: Business logic remains free from technical concerns
+2. **Testability**: Domain can be tested in isolation without infrastructure
+3. **Flexibility**: Infrastructure can be swapped without affecting business logic
+4. **Maintainability**: Clear separation of concerns makes code easier to understand
+5. **Framework Independence**: Domain logic is not coupled to specific frameworks
--- a/documentation/attribute-routing.md
+++ b/documentation/attribute-routing.md
@ -0,0 +1,252 @@
+# Attribute-Based Routing
+
+The Foundation framework provides a modern attribute-based routing system that automatically discovers and registers
+routes when controllers are registered in the dependency injection container.
+
+## Overview
+
+Instead of manually registering routes in service providers, controllers can use PHP 8+ attributes to define their
+routes directly on controller methods. Routes are automatically processed when controllers are registered in the
+container.
+
+## Key Components
+
+### ControllerInterface
+
+Controllers must implement `Foundation\Core\Infrastructure\ControllerInterface` to have their route attributes
+processed:
+
+```php
+use Foundation\Core\Infrastructure\ControllerInterface;
+
+class MyController implements ControllerInterface
+{
+    // Route attributes will be processed for this controller
+}
+```
+
+### Route Attributes
+
+#### Basic Route Attributes
+
+- `#[Get('/path')]` - GET requests
+- `#[Post('/path')]` - POST requests
+- `#[Put('/path')]` - PUT requests
+- `#[Delete('/path')]` - DELETE requests
+- `#[Route('/path', ['GET', 'POST'])]` - Custom HTTP methods
+
+#### Group Attribute
+
+Use `#[Group('/prefix')]` on controller classes to add a common prefix to all routes:
+
+```php
+#[Group('/api/users')]
+class UserController implements ControllerInterface
+{
+    #[Get('')]          // Route: GET /api/users
+    #[Get('/{id}')]     // Route: GET /api/users/{id}
+    #[Post('')]         // Route: POST /api/users
+}
+```
+
+#### Route Options
+
+All route attributes support additional options:
+
+```php
+#[Get('/path', name: 'route.name', middleware: [AuthMiddleware::class])]
+#[Group('/api', middleware: [RateLimitMiddleware::class])]
+```
+
+## Examples
+
+### Basic Controller
+
+```php
+<?php
+
+namespace App\Infrastructure\Web;
+
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Get;
+use Foundation\Core\Routing\Attributes\Post;
+
+class ProductController implements ControllerInterface
+{
+    #[Get('/products')]
+    public function index(): ResponseInterface
+    {
+        // Handle GET /products
+    }
+
+    #[Get('/products/{id}')]
+    public function show(string $id): ResponseInterface
+    {
+        // Handle GET /products/{id}
+    }
+
+    #[Post('/products')]
+    public function create(): ResponseInterface
+    {
+        // Handle POST /products
+    }
+}
+```
+
+### API Controller with Groups
+
+```php
+<?php
+
+namespace App\Infrastructure\Api;
+
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Get;
+use Foundation\Core\Routing\Attributes\Post;
+use Foundation\Core\Routing\Attributes\Group;
+
+#[Group('/api/v1/products')]
+class ProductApiController implements ControllerInterface
+{
+    #[Get('')]
+    public function index(): ResponseInterface
+    {
+        // Handle GET /api/v1/products
+    }
+
+    #[Get('/{id}')]
+    public function show(string $id): ResponseInterface
+    {
+        // Handle GET /api/v1/products/{id}
+    }
+
+    #[Post('')]
+    public function create(): ResponseInterface
+    {
+        // Handle POST /api/v1/products
+    }
+}
+```
+
+### Routes with Middleware
+
+```php
+<?php
+
+namespace App\Infrastructure\Api;
+
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Get;
+use Foundation\Core\Routing\Attributes\Post;
+use Foundation\Core\Routing\Attributes\Group;
+use App\Middleware\AuthMiddleware;
+use App\Middleware\AdminMiddleware;
+
+#[Group('/admin', middleware: [AuthMiddleware::class, AdminMiddleware::class])]
+class AdminController implements ControllerInterface
+{
+    #[Get('/dashboard')]
+    public function dashboard(): ResponseInterface
+    {
+        // Handle GET /admin/dashboard
+        // AuthMiddleware and AdminMiddleware applied
+    }
+
+    #[Post('/users', middleware: [ValidateUserMiddleware::class])]
+    public function createUser(): ResponseInterface
+    {
+        // Handle POST /admin/users
+        // AuthMiddleware, AdminMiddleware, and ValidateUserMiddleware applied
+    }
+}
+```
+
+## How It Works
+
+### Automatic Processing
+
+1. **Container Registration**: When a controller is registered in the DI container
+   using `$container->register(MyController::class)`, the system automatically checks if it
+   implements `ControllerInterface`
+
+2. **Attribute Discovery**: If the controller implements the interface, the `AttributeRouteProcessor` scans the
+   controller for route attributes
+
+3. **Route Registration**: Found route attributes are immediately registered with the Slim application
+
+4. **No Bootstrap Phase**: Routes are registered during container setup, not during application bootstrap
+
+### Processing Flow
+
+```
+Controller Registration
+        ↓
+ControllerInterface Check
+        ↓
+Route Attribute Discovery
+        ↓
+Slim Route Registration
+```
+
+## Architecture Benefits
+
+### Container-Driven Processing
+
+- Only processes controllers that are explicitly registered in the container
+- No filesystem scanning or discovery phase
+- Routes registered immediately when controllers are registered
+
+### Type Safety
+
+- Explicit interface contract (`ControllerInterface`)
+- Clear intent - controllers must opt-in to route processing
+- IDE support and autocompletion
+
+### Extensible Design
+
+- Built on generic `AttributeProcessorInterface`
+- Framework ready for other attribute types (validation, caching, etc.)
+- Modular and maintainable architecture
+
+## Best Practices
+
+### Controller Organization
+
+- Keep controllers focused and single-purpose
+- Use groups for logical route prefixes
+- Implement `ControllerInterface` only on actual controllers
+
+### Route Design
+
+- Use descriptive route paths
+- Group related routes using `#[Group]`
+- Apply middleware at the appropriate level (group vs individual routes)
+
+### Module Structure
+
+```
+src/Modules/{ModuleName}/Infrastructure/
+├── Api/           # API controllers with /api groups
+├── Web/           # Web controllers for HTML responses
+└── Console/       # Console commands (no route attributes)
+```
+
+## Troubleshooting
+
+### Routes Not Registered
+
+1. Ensure controller implements `ControllerInterface`
+2. Verify controller is registered in a service provider
+3. Check attribute syntax and imports
+
+### Route Conflicts
+
+- Use unique route paths
+- Check for overlapping group prefixes
+- Verify HTTP method combinations
+
+### Middleware Issues
+
+- Ensure middleware classes exist and are registered
+- Check middleware order (group middleware runs before route middleware)
+- Verify middleware implements correct interface
--- a/documentation/authentication.md
+++ b/documentation/authentication.md
@ -0,0 +1,431 @@
+# Authentication Guide
+
+## Installation
+
+```bash
+composer require firebase/php-jwt
+```
+
+## Core Value Objects
+
+### Value Objects
+
+```php
+// src/Core/Auth/ValueObjects/UserId.php
+final class UserId
+{
+    public function __construct(public readonly int $value) {}
+    public static function fromInt(int $id): self { return new self($id); }
+}
+
+// src/Core/Auth/ValueObjects/Email.php
+final class Email
+{
+    public function __construct(public readonly string $value) {}
+    public static function fromString(string $email): self { return new self($email); }
+}
+
+// src/Core/Auth/ValueObjects/HashedPassword.php
+final class HashedPassword
+{
+    public function __construct(public readonly string $hash) {}
+    
+    public static function fromPlainText(string $password): self
+    {
+        return new self(password_hash($password, PASSWORD_ARGON2ID));
+    }
+    
+    public function verify(string $password): bool
+    {
+        return password_verify($password, $this->hash);
+    }
+}
+
+// src/Core/Application/ValueObjects/AuthConfig.php
+final class AuthConfig
+{
+    public function __construct(
+        public readonly string $jwtSecret,
+        public readonly int $jwtAccessTokenTtl,
+        public readonly int $sessionLifetime,
+        public readonly int $maxLoginAttempts,
+    ) {}
+    
+    public static function fromEnvironment(): self
+    {
+        return new self(
+            $_ENV['JWT_SECRET'] ?? 'secret',
+            (int) ($_ENV['JWT_ACCESS_TOKEN_TTL'] ?? 900),
+            (int) ($_ENV['SESSION_LIFETIME'] ?? 7200),
+            (int) ($_ENV['AUTH_MAX_LOGIN_ATTEMPTS'] ?? 5),
+        );
+    }
+}
+```
+
+### User Entity
+
+```php
+// src/Core/Auth/Domain/User.php
+final class User
+{
+    public function __construct(
+        private readonly UserId $id,
+        private readonly Email $email,
+        private HashedPassword $password,
+        private bool $isActive = true,
+        private int $failedLoginAttempts = 0,
+    ) {}
+    
+    public static function create(UserId $id, Email $email, HashedPassword $password): self
+    {
+        return new self($id, $email, $password);
+    }
+    
+    public function getId(): UserId { return $this->id; }
+    public function getEmail(): Email { return $this->email; }
+    public function verifyPassword(string $password): bool { return $this->password->verify($password); }
+    public function isActive(): bool { return $this->isActive; }
+    public function recordFailedLogin(): void { $this->failedLoginAttempts++; }
+    public function resetLoginAttempts(): void { $this->failedLoginAttempts = 0; }
+}
+
+// src/Core/Auth/Domain/UserRepositoryInterface.php
+interface UserRepositoryInterface
+{
+    public function save(User $user): void;
+    public function findById(UserId $id): ?User;
+    public function findByEmail(Email $email): ?User;
+    public function emailExists(Email $email): bool;
+}
+```
+
+### Authentication Services
+
+```php
+// src/Core/Auth/AuthenticationManagerInterface.php
+interface AuthenticationManagerInterface
+{
+    public function login(Email $email, string $password): AuthResult;
+    public function register(Email $email, string $password): User;
+    public function getCurrentUser(): ?User;
+    public function isAuthenticated(): bool;
+}
+
+// src/Core/Auth/AuthResult.php
+final class AuthResult
+{
+    public function __construct(
+        public readonly bool $success,
+        public readonly ?User $user = null,
+        public readonly ?string $accessToken = null,
+        public readonly ?string $error = null,
+    ) {}
+    
+    public static function success(User $user, ?string $accessToken = null): self
+    {
+        return new self(true, $user, $accessToken);
+    }
+    
+    public static function failure(string $error): self
+    {
+        return new self(false, null, null, $error);
+    }
+}
+```
+
+### Session Authentication Manager
+
+```php
+// src/Core/Auth/SessionAuthenticationManager.php
+final class SessionAuthenticationManager implements AuthenticationManagerInterface
+{
+    public function __construct(
+        private readonly UserRepositoryInterface $userRepository,
+        private readonly SessionManagerInterface $sessionManager,
+        private readonly AuthConfig $authConfig,
+    ) {}
+
+    public function login(Email $email, string $password): AuthResult
+    {
+        $user = $this->userRepository->findByEmail($email);
+        
+        if (!$user || !$user->verifyPassword($password)) {
+            return AuthResult::failure('Invalid credentials');
+        }
+
+        $this->sessionManager->set('user_id', $user->getId()->value);
+        return AuthResult::success($user);
+    }
+
+    public function register(Email $email, string $password): User
+    {
+        $user = User::create(
+            UserId::fromInt(random_int(1, 999999)),
+            $email,
+            HashedPassword::fromPlainText($password)
+        );
+        
+        $this->userRepository->save($user);
+        return $user;
+    }
+
+    public function getCurrentUser(): ?User
+    {
+        $userId = $this->sessionManager->get('user_id');
+        return $userId ? $this->userRepository->findById(UserId::fromInt($userId)) : null;
+    }
+
+    public function isAuthenticated(): bool
+    {
+        return $this->getCurrentUser() !== null;
+    }
+}
+```
+
+### JWT Authentication Manager
+
+```php
+// src/Core/Auth/JwtAuthenticationManager.php
+final class JwtAuthenticationManager implements AuthenticationManagerInterface
+{
+    private ?User $currentUser = null;
+
+    public function __construct(
+        private readonly UserRepositoryInterface $userRepository,
+        private readonly JwtTokenManagerInterface $tokenManager,
+    ) {}
+
+    public function login(Email $email, string $password): AuthResult
+    {
+        $user = $this->userRepository->findByEmail($email);
+        
+        if (!$user || !$user->verifyPassword($password)) {
+            return AuthResult::failure('Invalid credentials');
+        }
+
+        $accessToken = $this->tokenManager->createAccessToken($user);
+        return AuthResult::success($user, $accessToken);
+    }
+
+    public function register(Email $email, string $password): User
+    {
+        $user = User::create(
+            UserId::fromInt(random_int(1, 999999)),
+            $email,
+            HashedPassword::fromPlainText($password)
+        );
+        
+        $this->userRepository->save($user);
+        return $user;
+    }
+
+    public function getCurrentUser(): ?User { return $this->currentUser; }
+    public function setCurrentUser(?User $user): void { $this->currentUser = $user; }
+    public function isAuthenticated(): bool { return $this->currentUser !== null; }
+}
+```
+
+### JWT Token Manager
+
+```php
+// src/Core/Auth/JwtTokenManagerInterface.php
+interface JwtTokenManagerInterface
+{
+    public function createAccessToken(User $user): string;
+    public function validateAccessToken(string $token): ?array;
+}
+
+// src/Core/Auth/JwtTokenManager.php
+final class JwtTokenManager implements JwtTokenManagerInterface
+{
+    public function __construct(private readonly AuthConfig $authConfig) {}
+
+    public function createAccessToken(User $user): string
+    {
+        $payload = [
+            'sub' => $user->getId()->value,
+            'email' => $user->getEmail()->value,
+            'exp' => time() + $this->authConfig->jwtAccessTokenTtl,
+        ];
+
+        return JWT::encode($payload, $this->authConfig->jwtSecret, 'HS256');
+    }
+
+    public function validateAccessToken(string $token): ?array
+    {
+        try {
+            return (array) JWT::decode($token, new Key($this->authConfig->jwtSecret, 'HS256'));
+        } catch (\Exception) {
+            return null;
+        }
+    }
+}
+```
+
+### Authentication Middleware
+
+```php
+// src/Core/Auth/Middleware/RequireAuthMiddleware.php
+final class RequireAuthMiddleware implements MiddlewareInterface
+{
+    public function __construct(private readonly AuthenticationManagerInterface $authManager) {}
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        if (!$this->authManager->isAuthenticated()) {
+            $response = new Response();
+            return $response->withStatus(401)->withHeader('Content-Type', 'application/json');
+        }
+
+        return $handler->handle($request);
+    }
+}
+```
+
+### Route Protection Attributes
+
+```php
+// src/Core/Auth/Attributes/RequireAuth.php
+#[Attribute(Attribute::TARGET_METHOD | Attribute::TARGET_CLASS)]
+final class RequireAuth {}
+
+// src/Core/Auth/Attributes/AllowAnonymous.php
+#[Attribute(Attribute::TARGET_METHOD | Attribute::TARGET_CLASS)]
+final class AllowAnonymous {}
+```
+
+### Database Schema
+
+```sql
+CREATE TABLE users (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    email VARCHAR(255) UNIQUE NOT NULL,
+    password VARCHAR(255) NOT NULL,
+    is_active BOOLEAN DEFAULT TRUE,
+    failed_login_attempts INT DEFAULT 0,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+```
+
+### Repository Implementation
+
+```php
+// src/Core/Auth/Infrastructure/Database/UserRepository.php
+final class UserRepository implements UserRepositoryInterface
+{
+    public function __construct(private readonly PDO $pdo) {}
+
+    public function save(User $user): void
+    {
+        $sql = "INSERT INTO users (id, email, password, is_active) VALUES (?, ?, ?, ?) 
+                ON DUPLICATE KEY UPDATE email=VALUES(email), password=VALUES(password)";
+        $this->pdo->prepare($sql)->execute([
+            $user->getId()->value,
+            $user->getEmail()->value, 
+            $user->getPassword()->hash,
+            $user->isActive()
+        ]);
+    }
+
+    public function findById(UserId $id): ?User
+    {
+        $stmt = $this->pdo->prepare("SELECT * FROM users WHERE id = ?");
+        $stmt->execute([$id->value]);
+        $data = $stmt->fetch(PDO::FETCH_ASSOC);
+        return $data ? User::fromArray($data) : null;
+    }
+
+    public function findByEmail(Email $email): ?User
+    {
+        $stmt = $this->pdo->prepare("SELECT * FROM users WHERE email = ?");
+        $stmt->execute([$email->value]);
+        $data = $stmt->fetch(PDO::FETCH_ASSOC);
+        return $data ? User::fromArray($data) : null;
+    }
+
+    public function emailExists(Email $email): bool
+    {
+        $stmt = $this->pdo->prepare("SELECT COUNT(*) FROM users WHERE email = ?");
+        $stmt->execute([$email->value]);
+        return $stmt->fetchColumn() > 0;
+    }
+}
+```
+
+### Bootstrapper Integration
+
+```php
+// src/Core/Application/Bootstrapper/AuthenticationInitializer.php
+class AuthenticationInitializer implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $container->set(AuthConfig::class, AuthConfig::fromEnvironment());
+        $container->bind(UserRepositoryInterface::class, UserRepository::class, [PDO::class]);
+        
+        if (($_ENV['AUTH_TYPE'] ?? 'session') === 'jwt') {
+            $container->bind(JwtTokenManagerInterface::class, JwtTokenManager::class, [AuthConfig::class]);
+            $container->bind(AuthenticationManagerInterface::class, JwtAuthenticationManager::class);
+        } else {
+            $container->bind(AuthenticationManagerInterface::class, SessionAuthenticationManager::class);
+        }
+    }
+}
+```
+
+### Usage Example
+
+```php
+// Example controller
+class AuthController implements ControllerInterface
+{
+    public function __construct(private readonly AuthenticationManagerInterface $authManager) {}
+
+    #[Post('/login')]
+    public function login(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $data = json_decode($request->getBody()->getContents(), true);
+        $result = $this->authManager->login(
+            Email::fromString($data['email']),
+            $data['password']
+        );
+
+        $response->getBody()->write(json_encode($result->success ? 
+            ['success' => true, 'token' => $result->accessToken] : 
+            ['error' => $result->error]
+        ));
+        
+        return $response->withHeader('Content-Type', 'application/json');
+    }
+
+    #[Post('/register')]
+    public function register(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $data = json_decode($request->getBody()->getContents(), true);
+        
+        try {
+            $user = $this->authManager->register(
+                Email::fromString($data['email']),
+                $data['password']
+            );
+            
+            $response->getBody()->write(json_encode(['success' => true]));
+        } catch (\Exception $e) {
+            $response->getBody()->write(json_encode(['error' => $e->getMessage()]));
+        }
+        
+        return $response->withHeader('Content-Type', 'application/json');
+    }
+}
+```
+
+## Environment Configuration
+
+```env
+AUTH_TYPE=session
+JWT_SECRET=your-secret-key
+JWT_ACCESS_TOKEN_TTL=900
+SESSION_LIFETIME=7200
+AUTH_MAX_LOGIN_ATTEMPTS=5
+```
--- a/documentation/dependency-injection.md
+++ b/documentation/dependency-injection.md
@ -0,0 +1,114 @@
+# Dependency Injection Container
+
+This document provides comprehensive information about the Foundation framework's dependency injection container system,
+including the enhanced `InflectableContainer` and its advanced features.
+
+## Overview
+
+Foundation uses a custom `InflectableContainer` that wraps PHP-DI and provides additional features:
+
+- **Container Inflection**: Automatic method invocation during object resolution
+- **Smart Parameter Resolution**: Intelligent detection of class names vs static values
+- **Simplified Service Registration**: Clean syntax for dependency declaration
+- **Unit of Work Integration**: Seamless persistence layer coordination
+
+## Container Architecture
+
+### InflectableContainer
+
+The `InflectableContainer` is a wrapper around PHP-DI that provides enhanced functionality while maintaining full
+compatibility with PSR-11.
+
+```php
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+// Created via ContainerFactory
+$container = ContainerFactory::create();
+```
+
+## Service Registration
+
+### Basic Registration
+
+Register services with explicit dependencies:
+
+```php
+// Simple service with dependencies
+$container->register(FetchAllActivitiesFromDatabase::class, [\PDO::class]);
+
+// Multiple dependencies
+$container->register(ActivityApiController::class, [
+    FetchAllActivities::class,
+    SetAllActivitiesAsRead::class
+]);
+```
+
+### Interface Binding
+
+Bind interfaces to concrete implementations:
+
+```php
+$container->bind(ActivityRepositoryInterface::class, ActivityRepository::class, [
+    FetchAllActivitiesFromDatabase::class,
+    SetAllActivitiesAsReadInDatabase::class,
+    UnitOfWorkInterface::class
+]);
+```
+
+### Advanced Registration
+
+```php
+// No dependencies (uses auto-wiring)
+$container->register(SimpleService::class);
+
+// Custom factory closure (when needed)
+$container->set(ComplexService::class, function (InflectableContainer $container) {
+    $service = new ComplexService();
+    $service->configure($container->get(AppConfig::class));
+    return $service;
+});
+```
+
+## Container Inflection
+
+Container inflection allows you to automatically invoke methods on resolved objects. This is particularly useful for
+cross-cutting concerns and modular registration.
+
+### Basic Inflection
+
+```php
+// Register a persister to the UnitOfWork when it's created
+$container->inflect(UnitOfWork::class)
+          ->invokeMethod('registerPersister', [ActivityPersister::class]);
+```
+
+### Smart Parameter Resolution
+
+The inflection system automatically detects what needs container resolution:
+
+```php
+// Mixed parameters: class + static values
+$container->inflect(EmailService::class)
+          ->invokeMethod('configure', [LoggerInterface::class, 'smtp.example.com']);
+
+// Resolves: LoggerInterface → instance, 'smtp.example.com' → static string
+```
+
+### Multiple Inflections
+
+```php
+$container->inflect(DatabaseService::class)
+          ->invokeMethod('setLogger', [LoggerInterface::class])
+          ->invokeMethod('setEnvironment', ['production'])
+          ->invokeMethod('addMiddleware', [AuthMiddleware::class]);
+```
+
+### Interface-Based Inflection
+
+Inflect on interfaces for broader application:
+
+```php
+// Apply to all classes implementing LoggerAwareInterface
+$container->inflect(LoggerAwareInterface::class)
+          ->invokeMethod('setLogger', [LoggerInterface::class]);
+```
--- a/documentation/docker-setup.md
+++ b/documentation/docker-setup.md
@ -0,0 +1,160 @@
+# Docker Development Environment
+
+This document describes how to set up and use the Docker development environment for the Foundation framework.
+
+## Overview
+
+The Docker environment provides:
+
+- **PHP 8.1** with Apache web server
+- **MySQL 8.0** database server
+- **Xdebug** for debugging support
+- **phpMyAdmin** for database management
+- **Composer** for dependency management
+
+## Prerequisites
+
+Make sure you have the following installed on your system:
+
+- [Docker](https://docs.docker.com/get-docker/)
+- [Docker Compose](https://docs.docker.com/compose/install/)
+
+## Services
+
+### Application Server (app)
+
+- **Port**: 8000
+- **Container**: foundation-app
+- **Base Image**: php:8.1-apache
+- **Features**: PHP, Apache, Xdebug, Composer, URL Rewriting
+
+### Database Server (db)
+
+- **Port**: 3306
+- **Container**: foundation-db
+- **Base Image**: mysql:8.0
+- **Database**: foundation
+- **User**: foundation_user
+- **Password**: foundation_password
+
+### Database Management (phpmyadmin)
+
+- **Port**: 8080
+- **Container**: foundation-phpmyadmin
+- **Base Image**: phpmyadmin/phpmyadmin
+- **Access**: http://localhost:8080
+
+## Environment Configuration
+
+### Docker Environment Variables
+
+The following environment variables are automatically set in the Docker environment:
+
+```env
+DB_HOST=db
+DB_PORT=3306
+DB_DATABASE=foundation
+DB_USERNAME=foundation_user
+DB_PASSWORD=foundation_password
+```
+
+## Xdebug Configuration
+
+### PHPStorm Setup
+
+1. **Configure PHP Interpreter**:
+    - Go to `Settings > PHP`
+    - Add new CLI Interpreter: "From Docker, Vagrant..."
+    - Select Docker Compose, service: `app`
+
+2. **Configure Debug Settings**:
+    - Go to `Settings > PHP > Debug`
+    - Set Xdebug port to `9003`
+    - Check "Can accept external connections"
+
+3. **Configure Server**:
+    - Go to `Settings > PHP > Servers`
+    - Add new server:
+        - Name: `foundation-docker`
+        - Host: `localhost`
+        - Port: `8000`
+        - Debugger: `Xdebug`
+        - Use path mappings: `/path/to/local/project` → `/var/www/html`
+
+4. **Start Debugging**:
+    - Set breakpoints in your code
+    - Click "Start Listening for PHP Debug Connections"
+    - Navigate to http://localhost:8000
+
+### VS Code Setup
+
+1. **Install PHP Debug Extension**
+
+2. **Configure launch.json**:
+
+```json
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Listen for Xdebug",
+            "type": "php",
+            "request": "launch",
+            "port": 9003,
+            "pathMappings": {
+                "/var/www/html": "${workspaceFolder}"
+            }
+        }
+    ]
+}
+```
+
+## Common Commands
+
+### Container Management
+
+```bash
+# Start services
+docker-compose up -d
+
+# Stop services
+docker-compose down
+
+# Restart a service
+docker-compose restart app
+
+# View logs
+docker-compose logs app
+
+# Access container shell
+docker-compose exec app bash
+```
+
+### Application Commands
+
+```bash
+# Install dependencies
+docker-compose exec app composer install
+
+# Run tests (when available)
+docker-compose exec app vendor/bin/phpunit
+
+# Clear logs
+docker-compose exec app rm -f storage/logs/*
+
+# Check PHP version
+docker-compose exec app php -v
+```
+
+### Database Commands
+
+```bash
+# Access MySQL CLI
+docker-compose exec db mysql -u foundation_user -p foundation
+
+# Import SQL file
+docker-compose exec -T db mysql -u foundation_user -pfoundation_password foundation < database/schema.sql
+
+# Export database
+docker-compose exec db mysqldump -u foundation_user -pfoundation_password foundation > backup.sql
+```
--- a/documentation/internationalization.md
+++ b/documentation/internationalization.md
@ -0,0 +1,170 @@
+# Internationalization (i18n) Guide
+
+## Installation
+
+```bash
+composer require symfony/translation symfony/yaml
+```
+
+## Core Implementation
+
+### LocaleConfig Value Object
+
+```php
+// src/Core/Application/ValueObjects/LocaleConfig.php
+final class LocaleConfig
+{
+    public function __construct(
+        public readonly string $defaultLocale,
+        public readonly array $supportedLocales,
+        public readonly string $fallbackLocale,
+    ) {}
+
+    public static function fromEnvironment(): self
+    {
+        return new self(
+            $_ENV['APP_LOCALE'] ?? 'en',
+            explode(',', $_ENV['APP_SUPPORTED_LOCALES'] ?? 'en,de,fr'),
+            $_ENV['APP_FALLBACK_LOCALE'] ?? 'en',
+        );
+    }
+}
+```
+
+### Translation Manager
+
+```php
+// src/Core/Internalization/TranslationManagerInterface.php
+interface TranslationManagerInterface
+{
+    public function trans(string $key, array $parameters = [], ?string $domain = null): string;
+    public function setLocale(string $locale): void;
+    public function addResource(string $format, mixed $resource, string $locale, ?string $domain = null): void;
+}
+
+// src/Core/Internalization/TranslationManager.php
+final class TranslationManager implements TranslationManagerInterface
+{
+    private Translator $translator;
+
+    public function __construct(LocaleConfig $localeConfig)
+    {
+        $this->translator = new Translator($localeConfig->defaultLocale);
+        $this->translator->setFallbackLocales([$localeConfig->fallbackLocale]);
+        $this->translator->addLoader('yaml', new YamlFileLoader());
+    }
+
+    public function trans(string $key, array $parameters = [], ?string $domain = null): string
+    {
+        return $this->translator->trans($key, $parameters, $domain);
+    }
+
+    public function setLocale(string $locale): void
+    {
+        $this->translator->setLocale($locale);
+    }
+
+    public function addResource(string $format, mixed $resource, string $locale, ?string $domain = null): void
+    {
+        $this->translator->addResource($format, $resource, $locale, $domain);
+    }
+}
+```
+
+### Bootstrapper
+
+```php
+// src/Core/Application/Bootstrapper/TranslationInitializer.php
+class TranslationInitializer implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $container->set(LocaleConfig::class, LocaleConfig::fromEnvironment());
+        $container->bind(TranslationManagerInterface::class, TranslationManager::class, [LocaleConfig::class]);
+        
+        $this->loadTranslationFiles($container);
+    }
+    
+    private function loadTranslationFiles(InflectableContainer $container): void
+    {
+        $manager = $container->get(TranslationManagerInterface::class);
+        $config = $container->get(LocaleConfig::class);
+        
+        // Load framework translations
+        foreach ($config->supportedLocales as $locale) {
+            $file = dirname(__DIR__, 4) . "/translations/{$locale}/messages.yaml";
+            if (file_exists($file)) {
+                $manager->addResource('yaml', $file, $locale, 'messages');
+            }
+        }
+        
+        // Load module translations
+        foreach (glob(dirname(__DIR__, 3) . '/Modules/*/translations/*/messages.yaml') as $file) {
+            $parts = explode('/', $file);
+            $locale = $parts[count($parts) - 2];
+            $manager->addResource('yaml', $file, $locale, 'messages');
+        }
+    }
+}
+```
+
+### Helper Functions
+
+```php
+// src/Core/Internalization/helpers.php
+function trans(string $key, array $parameters = []): string {
+    global $container;
+    static $translator = null;
+    $translator ??= $container->get(TranslationManagerInterface::class);
+    return $translator->trans($key, $parameters);
+}
+
+function __(string $key, array $parameters = []): string {
+    return trans($key, $parameters);
+}
+```
+
+## Usage
+
+### Directory Structure
+
+```
+translations/en/messages.yaml
+translations/de/messages.yaml
+src/Modules/{Module}/translations/en/messages.yaml
+```
+
+### Translation Files (YAML)
+
+```yaml
+# translations/en/messages.yaml
+welcome:
+  title: "Welcome to Foundation"
+  message: "Hello, %name%!"
+user:
+  profile: "User Profile"
+```
+
+### Controller Usage
+
+```php
+class WelcomeController implements ControllerInterface
+{
+    public function __construct(private readonly TranslationManagerInterface $translator) {}
+    
+    public function index(): ResponseInterface
+    {
+        $title = $this->translator->trans('welcome.title');
+        $message = __('welcome.message', ['%name%' => 'John']);
+        // ...
+    }
+}
+```
+
+### Environment Configuration
+
+```env
+APP_LOCALE=en
+APP_SUPPORTED_LOCALES=en,de,fr
+APP_FALLBACK_LOCALE=en
+```
--- a/documentation/unit-of-work.md
+++ b/documentation/unit-of-work.md
@ -0,0 +1,51 @@
+## Unit of Work Pattern
+
+The framework includes a sophisticated Unit of Work pattern for database operations.
+
+### Entity Persisters
+
+Entity persisters handle database operations for specific entity types:
+
+```php
+class ActivityPersister implements EntityPersisterInterface
+{
+    public function insert(object $entity, PDO $pdo): void { /* implementation */ }
+    public function update(object $entity, PDO $pdo): void { /* implementation */ }
+    public function delete(object $entity, PDO $pdo): void { /* implementation */ }
+    public function supports(object $entity): bool { return $entity instanceof Activity; }
+}
+```
+
+### Registration with Inflection
+
+Persisters are registered with UnitOfWork via inflection:
+
+```php
+// Register the persister
+$container->register(ActivityPersister::class);
+
+// Auto-register with UnitOfWork
+$container->inflect(UnitOfWork::class)
+          ->invokeMethod('registerPersister', [ActivityPersister::class]);
+```
+
+### Usage in Repositories
+
+```php
+class ActivityRepository implements ActivityRepositoryInterface
+{
+    public function save(Activity $activity): void
+    {
+        if ($activity->getId() > 0) {
+            $this->unitOfWork->registerDirty($activity);
+        } else {
+            $this->unitOfWork->registerNew($activity);
+        }
+    }
+
+    public function flush(): void
+    {
+        $this->unitOfWork->commit(); // Executes all operations in single transaction
+    }
+}
+```
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@ -0,0 +1,16 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^Throwing checked exception DI\\\\DependencyException in arrow function\\!$#"
+			count: 2
+			path: src/Core/Application/DependencyInjection/ContainerFactory.php
+
+		-
+			message: "#^Throwing checked exception DI\\\\NotFoundException in arrow function\\!$#"
+			count: 2
+			path: src/Core/Application/DependencyInjection/ContainerFactory.php
+
+		-
+			message: "#^Throwing checked exception Psr\\\\Container\\\\ContainerExceptionInterface in closure\\!$#"
+			count: 2
+			path: src/Core/DependencyInjection/InflectableContainer.php
--- a/phpstan.neon
+++ b/phpstan.neon
@ -0,0 +1,21 @@
+includes:
+    - phpstan-baseline.neon
+
+parameters:
+    level: 6
+    paths:
+        - src
+    
+    # Bootstrap for autoloading
+    bootstrapFiles:
+        - vendor/autoload.php
+    
+    # Enable generic templates
+    inferPrivatePropertyTypeFromConstructor: true
+    
+    # Ignore patterns
+    ignoreErrors:
+        -
+            identifier: missingType.iterableValue
+        -
+            identifier: missingType.generics
--- a/phpunit.xml
+++ b/phpunit.xml
@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         cacheDirectory=".phpunit.cache"
+         backupGlobals="false"
+         backupStaticProperties="false">
+    
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>tests/Unit</directory>
+        </testsuite>
+        <testsuite name="Integration Tests">
+            <directory>tests/Integration</directory>
+        </testsuite>
+        <testsuite name="Core">
+            <directory>tests/Unit/Core</directory>
+        </testsuite>
+    </testsuites>
+
+    <source>
+        <include>
+            <directory>src</directory>
+        </include>
+        <exclude>
+            <directory>src/Modules</directory>
+        </exclude>
+    </source>
+
+    <coverage>
+        <report>
+            <html outputDirectory="coverage-html"/>
+            <text outputFile="php://stdout"/>
+        </report>
+    </coverage>
+
+    <logging>
+        <junit outputFile="phpunit-junit.xml"/>
+    </logging>
+
+    <php>
+        <env name="APP_ENV" value="testing"/>
+    </php>
+</phpunit>
--- a/public/.htaccess
+++ b/public/.htaccess
@ -0,0 +1,7 @@
+RewriteEngine On
+
+# Handle Angular and other front-end framework routes
+# Send all requests to index.php unless a file or directory exists
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^ index.php [QSA,L]
--- a/public/index.php
+++ b/public/index.php
@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+use Foundation\Core\Application\Application;
+use Foundation\Core\Application\DependencyInjection\ContainerFactory;
+use Foundation\Core\Application\Bootstrapper\ConfigInitializer;
+use Foundation\Core\Application\Bootstrapper\DatabaseInitializer;
+use Foundation\Core\Application\Bootstrapper\SessionInitializer;
+use Foundation\Core\Application\Bootstrapper\SlimAppRegistrar;
+use Foundation\Core\Application\Bootstrapper\ModuleLoader;
+
+require_once dirname(__DIR__) . '/vendor/autoload.php';
+
+try {
+    $container = ContainerFactory::create();
+
+    $app = new Application($container);
+
+    $app->addBootstrapper(new ConfigInitializer());
+    $app->addBootstrapper(new DatabaseInitializer());
+    $app->addBootstrapper(new SessionInitializer());
+    $app->addBootstrapper(new SlimAppRegistrar());
+    $app->addBootstrapper(new ModuleLoader());
+
+    $app->run();
+} catch (\Throwable $e) {
+    http_response_code(500);
+    echo json_encode([
+        'error' => 'Application failed to start',
+        'message' => $e->getMessage(),
+        'file' => $e->getFile(),
+        'line' => $e->getLine(),
+    ], JSON_PRETTY_PRINT);
+}
--- a/rector.php
+++ b/rector.php
@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types = 1);
+
+use Rector\CodeQuality\Rector\BooleanNot\SimplifyDeMorganBinaryRector;
+use Rector\CodeQuality\Rector\Empty_\SimplifyEmptyCheckOnEmptyArrayRector;
+use Rector\Config\RectorConfig;
+use Rector\Php80\Rector\FunctionLike\MixedTypeRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddParamTypeDeclarationRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddReturnTypeDeclarationRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\AddVoidReturnTypeWhereNoReturnRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromReturnNewRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromStrictTypedCallRector;
+use Rector\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromStrictTypedPropertyRector;
+use Rector\TypeDeclaration\Rector\Property\AddPropertyTypeDeclarationRector;
+
+return RectorConfig::configure()->withPaths([
+    __DIR__.'/src',
+])->withSkip([
+    // Skip vendor and other directories
+    __DIR__.'/vendor',
+    __DIR__.'/storage',
+    __DIR__.'/public',
+])->withRules([
+    // Add missing return types
+    AddVoidReturnTypeWhereNoReturnRector::class,
+    AddReturnTypeDeclarationRector::class,
+    ReturnTypeFromReturnNewRector::class,
+    ReturnTypeFromStrictTypedCallRector::class,
+    ReturnTypeFromStrictTypedPropertyRector::class,
+
+    // Add missing parameter types
+    AddParamTypeDeclarationRector::class,
+
+    // Add missing property types
+    AddPropertyTypeDeclarationRector::class,
+
+    // Code quality improvements
+    SimplifyEmptyCheckOnEmptyArrayRector::class,
+    SimplifyDeMorganBinaryRector::class,
+
+    // PHP 8+ features
+    MixedTypeRector::class,
+])->withPhpSets(
+    php81: true,
+);
--- a/src/Core/Application/Application.php
+++ b/src/Core/Application/Application.php
@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application;
+
+use Foundation\Core\Application\Bootstrapper\BootstrapperInterface;
+use Foundation\Core\Application\Kernel\HttpKernel;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+class Application
+{
+    /** @var BootstrapperInterface[] */
+    private array $bootstrappers = [];
+
+    public function __construct(private readonly InflectableContainer $container)
+    {
+    }
+
+    public function addBootstrapper(BootstrapperInterface $bootstrapper): void
+    {
+        $this->bootstrappers[] = $bootstrapper;
+    }
+
+    public function bootstrap(): void
+    {
+        foreach ($this->bootstrappers as $bootstrapper) {
+            $bootstrapper->bootstrap($this->container);
+        }
+    }
+
+    public function run(): void
+    {
+        $this->bootstrap();
+
+        /** @var HttpKernel $kernel */
+        $kernel = $this->container->get(HttpKernel::class);
+        $kernel->handle();
+    }
+
+    public function getContainer(): InflectableContainer
+    {
+        return $this->container;
+    }
+}
--- a/src/Core/Application/Bootstrapper/BootstrapperInterface.php
+++ b/src/Core/Application/Bootstrapper/BootstrapperInterface.php
@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+interface BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void;
+}
--- a/src/Core/Application/Bootstrapper/ConfigInitializer.php
+++ b/src/Core/Application/Bootstrapper/ConfigInitializer.php
@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Dotenv\Dotenv;
+use Foundation\Core\Application\ValueObjects\AppConfig;
+use Foundation\Core\Application\ValueObjects\DatabaseConfig;
+use Foundation\Core\Application\ValueObjects\SessionConfig;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+class ConfigInitializer implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $rootPath = dirname(__DIR__, 4);
+        $dotenv = Dotenv::createImmutable($rootPath);
+
+        // Load .env.docker first if it exists (for Docker environment)
+        if (file_exists($rootPath . '/.env.docker')) {
+            $dotenv = Dotenv::createImmutable($rootPath, '.env.docker');
+            $dotenv->load();
+        } else {
+            if (file_exists($rootPath . '/.env')) {
+                $dotenv->load();
+            }
+        }
+
+        // Register value objects in container
+        $container->set(DatabaseConfig::class, DatabaseConfig::fromEnvironment());
+        $container->set(AppConfig::class, AppConfig::fromEnvironment());
+        $container->set(SessionConfig::class, SessionConfig::fromEnvironment());
+    }
+}
--- a/src/Core/Application/Bootstrapper/DatabaseInitializer.php
+++ b/src/Core/Application/Bootstrapper/DatabaseInitializer.php
@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Foundation\Core\Application\ValueObjects\DatabaseConfig;
+use Foundation\Core\Database\UnitOfWork;
+use Foundation\Core\Database\UnitOfWorkInterface;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use PDO;
+use PDOException;
+
+class DatabaseInitializer implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        /** @var DatabaseConfig $databaseConfig */
+        $databaseConfig = $container->get(DatabaseConfig::class);
+
+        try {
+            $pdo = new PDO(
+                $databaseConfig->getDsn(), $databaseConfig->username, $databaseConfig->password, [
+                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+                    PDO::ATTR_EMULATE_PREPARES => false,
+                ]
+            );
+        } catch (PDOException $e) {
+            throw new PDOException('Database connection failed: ' . $e->getMessage(), 0, $e);
+        }
+
+        $container->set(PDO::class, $pdo);
+        $container->bind(UnitOfWorkInterface::class, UnitOfWork::class, [PDO::class]);
+    }
+}
--- a/src/Core/Application/Bootstrapper/ModuleLoader.php
+++ b/src/Core/Application/Bootstrapper/ModuleLoader.php
@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Foundation\Core\Application\ServiceProvider\ServiceProviderInterface;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+class ModuleLoader implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $this->discoverAndRegisterServiceProviders($container);
+    }
+
+    private function discoverAndRegisterServiceProviders(InflectableContainer $container): void
+    {
+        $moduleServiceProviders = $this->findModuleServiceProviders();
+
+        foreach ($moduleServiceProviders as $serviceProviderClass) {
+            if (class_exists($serviceProviderClass)) {
+                $serviceProvider = new $serviceProviderClass();
+
+                if ($serviceProvider instanceof ServiceProviderInterface) {
+                    $serviceProvider->bootstrap($container);
+                }
+            }
+        }
+    }
+
+    private function findModuleServiceProviders(): array
+    {
+        $serviceProviders = [];
+        $modulesPath = dirname(__DIR__, 3) . '/Modules';
+
+        if (!is_dir($modulesPath)) {
+            return $serviceProviders;
+        }
+
+        $moduleDirectories = glob($modulesPath . '/*', GLOB_ONLYDIR);
+
+        foreach ($moduleDirectories as $moduleDir) {
+            $moduleName = basename($moduleDir);
+            $serviceProviderFile = $moduleDir . '/' . $moduleName . 'ServiceProvider.php';
+
+            if (file_exists($serviceProviderFile)) {
+                $serviceProviderClass = "Foundation\\Modules\\{$moduleName}\\{$moduleName}ServiceProvider";
+                $serviceProviders[] = $serviceProviderClass;
+            }
+        }
+
+        return $serviceProviders;
+    }
+}
--- a/src/Core/Application/Bootstrapper/SessionInitializer.php
+++ b/src/Core/Application/Bootstrapper/SessionInitializer.php
@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Foundation\Core\Application\ValueObjects\SessionConfig;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use Foundation\Core\Session\SessionManager;
+use Foundation\Core\Session\SessionManagerInterface;
+
+class SessionInitializer implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $container->bind(SessionManagerInterface::class, SessionManager::class, [SessionConfig::class]);
+
+        /** @var SessionManagerInterface $sessionManager */
+        $sessionManager = $container->get(SessionManagerInterface::class);
+        $sessionManager->start();
+    }
+}
--- a/src/Core/Application/Bootstrapper/SlimAppRegistrar.php
+++ b/src/Core/Application/Bootstrapper/SlimAppRegistrar.php
@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Bootstrapper;
+
+use Foundation\Core\Application\ValueObjects\AppConfig;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use Foundation\Core\ErrorHandling\ErrorHandler;
+use Slim\App as SlimApp;
+
+class SlimAppRegistrar implements BootstrapperInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        /** @var SlimApp $slimApp */
+        $slimApp = $container->get(SlimApp::class);
+        /** @var AppConfig $appConfig */
+        $appConfig = $container->get(AppConfig::class);
+
+        $slimApp->addRoutingMiddleware();
+        $errorMiddleware = $slimApp->addErrorMiddleware(
+            $appConfig->debug,
+            true,
+            true,
+        );
+
+        /** @var ErrorHandler $errorHandler */
+        $errorHandler = $container->get(ErrorHandler::class);
+        $errorMiddleware->setDefaultErrorHandler($errorHandler);
+    }
+}
--- a/src/Core/Application/DependencyInjection/ContainerFactory.php
+++ b/src/Core/Application/DependencyInjection/ContainerFactory.php
@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\DependencyInjection;
+
+use DI\Container;
+use DI\ContainerBuilder;
+use Foundation\Core\Application\Kernel\HttpKernel;
+use Foundation\Core\Cache\ArrayCache;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use Foundation\Core\ErrorHandling\ErrorHandler;
+use Foundation\Core\Logging\LoggerFactory;
+use Foundation\Core\Routing\AttributeRouteProcessor;
+use Psr\Log\LoggerInterface;
+use Psr\SimpleCache\CacheInterface;
+use Slim\App as SlimApp;
+use Slim\Factory\AppFactory;
+
+class ContainerFactory
+{
+    public static function create(): InflectableContainer
+    {
+        $containerBuilder = new ContainerBuilder();
+
+        $containerBuilder->addDefinitions(
+            [
+                // Slim Framework
+                SlimApp::class => function (Container $container): SlimApp {
+                    AppFactory::setContainer($container);
+
+                    return AppFactory::create();
+                },
+                HttpKernel::class => fn(Container $container): HttpKernel => new HttpKernel(
+                    $container->get(SlimApp::class)
+                ),
+
+                // Core Services
+                ErrorHandler::class => fn(): ErrorHandler => new ErrorHandler(),
+                LoggerInterface::class => fn(): LoggerInterface => LoggerFactory::create(),
+                CacheInterface::class => fn(): ArrayCache => new ArrayCache(),
+                AttributeRouteProcessor::class => fn(Container $container): AttributeRouteProcessor => new AttributeRouteProcessor(
+                    $container->get(SlimApp::class)
+                ),
+            ],
+        );
+
+        $phpDiContainer = $containerBuilder->build();
+        $inflectableContainer = new InflectableContainer($phpDiContainer);
+        $inflectableContainer->addAttributeProcessor(
+            $inflectableContainer->get(AttributeRouteProcessor::class),
+        );
+
+        return $inflectableContainer;
+    }
+}
--- a/src/Core/Application/DependencyInjection/ServiceProviderInterface.php
+++ b/src/Core/Application/DependencyInjection/ServiceProviderInterface.php
@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\DependencyInjection;
+
+use Psr\Container\ContainerInterface;
+
+interface ServiceProviderInterface
+{
+    public function register(ContainerInterface $container): void;
+}
--- a/src/Core/Application/Kernel/HttpKernel.php
+++ b/src/Core/Application/Kernel/HttpKernel.php
@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\Kernel;
+
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\App;
+
+class HttpKernel
+{
+    public function __construct(private readonly App $slimApp)
+    {
+    }
+
+    public function handle(?ServerRequestInterface $request = null): void
+    {
+        $this->slimApp->run($request);
+    }
+
+    public function getSlimApp(): App
+    {
+        return $this->slimApp;
+    }
+}
--- a/src/Core/Application/ServiceProvider/AbstractServiceProvider.php
+++ b/src/Core/Application/ServiceProvider/AbstractServiceProvider.php
@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\ServiceProvider;
+
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+abstract class AbstractServiceProvider implements ServiceProviderInterface
+{
+    public function bootstrap(InflectableContainer $container): void
+    {
+        $this->register($container);
+        $this->boot($container);
+    }
+
+    abstract public function register(InflectableContainer $container): void;
+
+    public function boot(InflectableContainer $container): void
+    {
+    }
+}
--- a/src/Core/Application/ServiceProvider/ServiceProviderInterface.php
+++ b/src/Core/Application/ServiceProvider/ServiceProviderInterface.php
@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\ServiceProvider;
+
+use Foundation\Core\Application\Bootstrapper\BootstrapperInterface;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+
+interface ServiceProviderInterface extends BootstrapperInterface
+{
+    public function register(InflectableContainer $container): void;
+
+    public function boot(InflectableContainer $container): void;
+}
--- a/src/Core/Application/ValueObjects/AppConfig.php
+++ b/src/Core/Application/ValueObjects/AppConfig.php
@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\ValueObjects;
+
+final class AppConfig
+{
+    public function __construct(
+        public readonly bool   $debug,
+        public readonly string $name,
+        public readonly string $url,
+    )
+    {
+    }
+
+    public static function fromEnvironment(): self
+    {
+        return new self(
+            debug: self::parseBoolean($_ENV['APP_DEBUG'] ?? 'false'),
+            name: $_ENV['APP_NAME'] ?? 'Foundation',
+            url: $_ENV['APP_URL'] ?? 'http://localhost',
+        );
+    }
+
+    private static function parseBoolean(string $value): bool
+    {
+        return filter_var($value, FILTER_VALIDATE_BOOLEAN);
+    }
+}
--- a/src/Core/Application/ValueObjects/DatabaseConfig.php
+++ b/src/Core/Application/ValueObjects/DatabaseConfig.php
@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\ValueObjects;
+
+final class DatabaseConfig
+{
+    public function __construct(
+        public readonly string $host,
+        public readonly int    $port,
+        public readonly string $database,
+        public readonly string $username,
+        public readonly string $password,
+        public readonly string $charset,
+    )
+    {
+    }
+
+    public static function fromEnvironment(): self
+    {
+        return new self(
+            host: $_ENV['DB_HOST'] ?? 'localhost',
+            port: (int)($_ENV['DB_PORT'] ?? 3306),
+            database: $_ENV['DB_DATABASE'] ?? 'foundation',
+            username: $_ENV['DB_USERNAME'] ?? 'root',
+            password: $_ENV['DB_PASSWORD'] ?? '',
+            charset: $_ENV['DB_CHARSET'] ?? 'utf8mb4',
+        );
+    }
+
+    public function getDsn(): string
+    {
+        return sprintf(
+            'mysql:host=%s;port=%d;dbname=%s;charset=%s',
+            $this->host,
+            $this->port,
+            $this->database,
+            $this->charset,
+        );
+    }
+}
--- a/src/Core/Application/ValueObjects/SessionConfig.php
+++ b/src/Core/Application/ValueObjects/SessionConfig.php
@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Application\ValueObjects;
+
+final class SessionConfig
+{
+    public function __construct(
+        public readonly string $name,
+        public readonly int    $lifetime,
+    )
+    {
+    }
+
+    public static function fromEnvironment(): self
+    {
+        return new self(
+            name: $_ENV['SESSION_NAME'] ?? 'foundation_session', lifetime: (int)($_ENV['SESSION_LIFETIME'] ?? 7200),
+        );
+    }
+}
--- a/src/Core/Cache/ArrayCache.php
+++ b/src/Core/Cache/ArrayCache.php
@ -0,0 +1,122 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Cache;
+
+use DateInterval;
+use DateTime;
+use InvalidArgumentException;
+use Psr\SimpleCache\CacheInterface;
+use Psr\SimpleCache\InvalidArgumentException as SimpleCacheInvalidArgumentException;
+
+class ArrayCache implements CacheInterface
+{
+    private array $cache = [];
+    /** @var array<string, int> */
+    private array $expiry = [];
+
+    public function get(string $key, mixed $default = null): mixed
+    {
+        $this->validateKey($key);
+        if (!$this->has($key)) {
+            return $default;
+        }
+
+        return $this->cache[$key];
+    }
+
+    public function set(string $key, mixed $value, null|int|DateInterval $ttl = null): bool
+    {
+        $this->validateKey($key);
+        $this->cache[$key] = $value;
+
+        if ($ttl === null) {
+            unset($this->expiry[$key]);
+        } elseif ($ttl instanceof DateInterval) {
+            $this->expiry[$key] = time() + $this->dateIntervalToSeconds($ttl);
+        } else {
+            $this->expiry[$key] = time() + $ttl;
+        }
+
+        return true;
+    }
+
+    public function delete(string $key): bool
+    {
+        $this->validateKey($key);
+        unset($this->cache[$key], $this->expiry[$key]);
+
+        return true;
+    }
+
+    public function clear(): bool
+    {
+        $this->cache = [];
+        $this->expiry = [];
+
+        return true;
+    }
+
+    public function has(string $key): bool
+    {
+        $this->validateKey($key);
+        if (!isset($this->cache[$key])) {
+            return false;
+        }
+
+        if (isset($this->expiry[$key]) && $this->expiry[$key] < time()) {
+            unset($this->cache[$key], $this->expiry[$key]);
+
+            return false;
+        }
+
+        return true;
+    }
+
+    public function getMultiple(iterable $keys, mixed $default = null): iterable
+    {
+        $result = [];
+        foreach ($keys as $key) {
+            $result[$key] = $this->get($key, $default);
+        }
+
+        return $result;
+    }
+
+    public function setMultiple(iterable $values, null|int|DateInterval $ttl = null): bool
+    {
+        foreach ($values as $key => $value) {
+            $this->set($key, $value, $ttl);
+        }
+
+        return true;
+    }
+
+    public function deleteMultiple(iterable $keys): bool
+    {
+        foreach ($keys as $key) {
+            $this->delete($key);
+        }
+
+        return true;
+    }
+
+    private function validateKey(string $key): void
+    {
+        if ($key === '' || strpbrk($key, '{}()/\\@:') !== false) {
+            throw new class ('Invalid cache key: ' . $key) extends InvalidArgumentException
+                implements SimpleCacheInvalidArgumentException {
+            };
+        }
+    }
+
+    private function dateIntervalToSeconds(DateInterval $dateInterval): int
+    {
+        $now = new DateTime();
+        $then = clone $now;
+        $then->add($dateInterval);
+
+        return $then->getTimestamp() - $now->getTimestamp();
+    }
+}
--- a/src/Core/Database/EntityPersisterInterface.php
+++ b/src/Core/Database/EntityPersisterInterface.php
@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Database;
+
+use PDO;
+
+interface EntityPersisterInterface
+{
+    public function insert(object $entity, PDO $pdo): void;
+
+    public function update(object $entity, PDO $pdo): void;
+
+    public function delete(object $entity, PDO $pdo): void;
+
+    public function supports(object $entity): bool;
+}
--- a/src/Core/Database/EntityState.php
+++ b/src/Core/Database/EntityState.php
@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Database;
+
+enum EntityState: string
+{
+    case NEW = 'new';
+    case CLEAN = 'clean';
+    case DIRTY = 'dirty';
+    case REMOVED = 'removed';
+}
--- a/src/Core/Database/UnitOfWork.php
+++ b/src/Core/Database/UnitOfWork.php
@ -0,0 +1,190 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Database;
+
+use PDO;
+use PDOException;
+use RuntimeException;
+use SplObjectStorage;
+
+class UnitOfWork implements UnitOfWorkInterface
+{
+    private SplObjectStorage $entityStates;
+    private array $newEntities = [];
+    private array $dirtyEntities = [];
+    private array $removedEntities = [];
+    private bool $inTransaction = false;
+    /** @var EntityPersisterInterface[] */
+    private array $persisters = [];
+
+    public function __construct(private readonly PDO $pdo)
+    {
+        $this->entityStates = new SplObjectStorage();
+    }
+
+    public function registerNew(object $entity): void
+    {
+        $this->entityStates[$entity] = EntityState::NEW;
+        $this->newEntities[spl_object_id($entity)] = $entity;
+        $this->removeFromOtherCollections($entity, 'new');
+    }
+
+    public function registerDirty(object $entity): void
+    {
+        if (!isset($this->entityStates[$entity]) || $this->entityStates[$entity] === EntityState::CLEAN) {
+            $this->entityStates[$entity] = EntityState::DIRTY;
+            $this->dirtyEntities[spl_object_id($entity)] = $entity;
+            $this->removeFromOtherCollections($entity, 'dirty');
+        }
+    }
+
+    public function registerRemoved(object $entity): void
+    {
+        $this->entityStates[$entity] = EntityState::REMOVED;
+        $this->removedEntities[spl_object_id($entity)] = $entity;
+        $this->removeFromOtherCollections($entity, 'removed');
+    }
+
+    public function registerClean(object $entity): void
+    {
+        $this->entityStates[$entity] = EntityState::CLEAN;
+        $this->removeFromOtherCollections($entity, 'clean');
+    }
+
+    public function commit(): void
+    {
+        if ($this->newEntities === [] && $this->dirtyEntities === [] && $this->removedEntities === []) {
+            return;
+        }
+
+        try {
+            $this->pdo->beginTransaction();
+            $this->inTransaction = true;
+
+            $this->processRemovedEntities();
+            $this->processNewEntities();
+            $this->processDirtyEntities();
+
+            $this->pdo->commit();
+            $this->inTransaction = false;
+
+            $this->markAllAsClean();
+            $this->clear();
+        } catch (PDOException $e) {
+            $this->rollback();
+            throw $e;
+        }
+    }
+
+    public function rollback(): void
+    {
+        if ($this->inTransaction) {
+            $this->pdo->rollBack();
+            $this->inTransaction = false;
+        }
+    }
+
+    public function clear(): void
+    {
+        $this->newEntities = [];
+        $this->dirtyEntities = [];
+        $this->removedEntities = [];
+    }
+
+    public function getEntityState(object $entity): EntityState
+    {
+        return $this->entityStates[$entity] ?? EntityState::CLEAN;
+    }
+
+    public function isInTransaction(): bool
+    {
+        return $this->inTransaction;
+    }
+
+    public function registerPersister(EntityPersisterInterface $persister): void
+    {
+        $this->persisters[] = $persister;
+    }
+
+    private function removeFromOtherCollections(object $entity, string $except): void
+    {
+        $objectId = spl_object_id($entity);
+
+        if ($except !== 'new') {
+            unset($this->newEntities[$objectId]);
+        }
+        if ($except !== 'dirty') {
+            unset($this->dirtyEntities[$objectId]);
+        }
+        if ($except !== 'removed') {
+            unset($this->removedEntities[$objectId]);
+        }
+    }
+
+    private function processNewEntities(): void
+    {
+        foreach ($this->newEntities as $entity) {
+            $this->persistNewEntity($entity);
+        }
+    }
+
+    private function processDirtyEntities(): void
+    {
+        foreach ($this->dirtyEntities as $entity) {
+            $this->updateDirtyEntity($entity);
+        }
+    }
+
+    private function processRemovedEntities(): void
+    {
+        foreach ($this->removedEntities as $entity) {
+            $this->removeEntity($entity);
+        }
+    }
+
+    private function persistNewEntity(object $entity): void
+    {
+        $persister = $this->getPersisterForEntity($entity);
+        $persister->insert($entity, $this->pdo);
+    }
+
+    private function updateDirtyEntity(object $entity): void
+    {
+        $persister = $this->getPersisterForEntity($entity);
+        $persister->update($entity, $this->pdo);
+    }
+
+    private function removeEntity(object $entity): void
+    {
+        $persister = $this->getPersisterForEntity($entity);
+        $persister->delete($entity, $this->pdo);
+    }
+
+    private function getPersisterForEntity(object $entity): EntityPersisterInterface
+    {
+        foreach ($this->persisters as $persister) {
+            if ($persister->supports($entity)) {
+                return $persister;
+            }
+        }
+
+        throw new RuntimeException(
+            sprintf('No persister found for entity of type %s', $entity::class)
+        );
+    }
+
+    private function markAllAsClean(): void
+    {
+        foreach ($this->newEntities as $entity) {
+            $this->entityStates[$entity] = EntityState::CLEAN;
+        }
+        foreach ($this->dirtyEntities as $entity) {
+            $this->entityStates[$entity] = EntityState::CLEAN;
+        }
+        foreach ($this->removedEntities as $entity) {
+            unset($this->entityStates[$entity]);
+        }
+    }
+}
--- a/src/Core/Database/UnitOfWorkInterface.php
+++ b/src/Core/Database/UnitOfWorkInterface.php
@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Database;
+
+interface UnitOfWorkInterface
+{
+    public function registerNew(object $entity): void;
+
+    public function registerDirty(object $entity): void;
+
+    public function registerRemoved(object $entity): void;
+
+    public function registerClean(object $entity): void;
+
+    public function commit(): void;
+
+    public function rollback(): void;
+
+    public function clear(): void;
+
+    public function getEntityState(object $entity): EntityState;
+
+    public function isInTransaction(): bool;
+}
--- a/src/Core/DependencyInjection/AttributeProcessorInterface.php
+++ b/src/Core/DependencyInjection/AttributeProcessorInterface.php
@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\DependencyInjection;
+
+interface AttributeProcessorInterface
+{
+    public function canProcess(string $className): bool;
+
+    public function process(string $className): void;
+}
--- a/src/Core/DependencyInjection/InflectableContainer.php
+++ b/src/Core/DependencyInjection/InflectableContainer.php
@ -0,0 +1,195 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\DependencyInjection;
+
+use DI\Container;
+use Psr\Container\ContainerInterface;
+use function DI\create;
+
+class InflectableContainer implements ContainerInterface
+{
+    private array $inflections = [];
+    /** @var AttributeProcessorInterface[] */
+    private array $attributeProcessors = [];
+
+    public function __construct(private readonly Container $phpDiContainer)
+    {
+    }
+
+    /**
+     * @template T of object
+     * @param string $id
+     * @return ($id is class-string<T> ? T : mixed)
+     */
+    public function get(string $id): mixed
+    {
+        $instance = $this->phpDiContainer->get($id);
+
+        // Only apply inflections to objects, not arrays or primitives
+        if (is_object($instance)) {
+            return $this->applyInflections($instance);
+        }
+
+        return $instance;
+    }
+
+    public function has(string $id): bool
+    {
+        return $this->phpDiContainer->has($id);
+    }
+
+    public function set(string $name, mixed $value): void
+    {
+        $this->phpDiContainer->set($name, $value);
+    }
+
+    /**
+     * @template T of object
+     * @param class-string<T> $name
+     * @param array $parameters
+     * @return T
+     */
+    public function make(string $name, array $parameters = []): object
+    {
+        $instance = $this->phpDiContainer->make($name, $parameters);
+
+        return $this->applyInflections($instance);
+    }
+
+    public function inflect(string $class): InflectionHelper
+    {
+        return new InflectionHelper($this, $class);
+    }
+
+    public function register(string $abstract, array $dependencies = []): object
+    {
+        if ($dependencies === []) {
+            // Simple registration with no dependencies
+            $this->phpDiContainer->set($abstract, create($abstract));
+        } else {
+            // Registration with explicit dependencies
+            $this->phpDiContainer->set(
+                $abstract,
+                function (InflectableContainer $container) use ($abstract, $dependencies): object {
+                    $resolvedDependencies = [];
+                    foreach ($dependencies as $dependency) {
+                        $resolvedDependencies[] = $container->get($dependency);
+                    }
+
+                    return new $abstract(...$resolvedDependencies);
+                },
+            );
+        }
+
+        // Process attributes for the registered class
+        $this->processAttributes($abstract);
+
+        return $this->get($abstract);
+    }
+
+    public function bind(string $abstract, string $concrete, array $dependencies = []): object
+    {
+        if ($dependencies === []) {
+            // Simple interface-to-implementation binding
+            $this->phpDiContainer->set($abstract, create($concrete));
+        } else {
+            // Interface-to-implementation binding with explicit dependencies
+            $this->phpDiContainer->set(
+                $abstract,
+                function (InflectableContainer $container) use ($concrete, $dependencies): object {
+                    $resolvedDependencies = [];
+                    foreach ($dependencies as $dependency) {
+                        $resolvedDependencies[] = $container->get($dependency);
+                    }
+
+                    return new $concrete(...$resolvedDependencies);
+                },
+            );
+        }
+
+        return $this->get($abstract);
+    }
+
+    public function addAttributeProcessor(AttributeProcessorInterface $processor): void
+    {
+        $this->attributeProcessors[] = $processor;
+    }
+
+    public function registerInflection(string $targetClass, string $method, array $params): void
+    {
+        $this->inflections[$targetClass][] = [
+            'method' => $method,
+            'params' => $params,
+        ];
+    }
+
+    private function applyInflections(object $instance): object
+    {
+        $instanceClass = $instance::class;
+
+        // Apply direct class inflections
+        $this->applyDirectInflections($instance, $instanceClass);
+
+        // Apply interface/parent class inflections
+        $this->applyInheritanceInflections($instance);
+
+        return $instance;
+    }
+
+    private function applyDirectInflections(object $instance, string $instanceClass): void
+    {
+        if (isset($this->inflections[$instanceClass])) {
+            foreach ($this->inflections[$instanceClass] as $inflection) {
+                $resolvedParams = $this->resolveParameters($inflection['params']);
+                $methodName = $inflection['method'];
+                // @phpstan-ignore-next-line Dynamic method call is intentional for inflection
+                $instance->$methodName(...$resolvedParams);
+            }
+        }
+    }
+
+    private function applyInheritanceInflections(object $instance): void
+    {
+        foreach ($this->inflections as $targetClass => $inflections) {
+            if ($instance instanceof $targetClass) {
+                foreach ($inflections as $inflection) {
+                    $resolvedParams = $this->resolveParameters($inflection['params']);
+                    $methodName = $inflection['method'];
+                    // @phpstan-ignore-next-line Dynamic method call is intentional for inflection
+                    $instance->$methodName(...$resolvedParams);
+                }
+            }
+        }
+    }
+
+    private function resolveParameters(array $params): array
+    {
+        $resolved = [];
+        foreach ($params as $param) {
+            if (is_string($param) && $this->isResolvableClass($param)) {
+                $resolved[] = $this->phpDiContainer->get($param);
+            } else {
+                $resolved[] = $param;
+            }
+        }
+
+        return $resolved;
+    }
+
+    private function processAttributes(string $className): void
+    {
+        foreach ($this->attributeProcessors as $processor) {
+            if ($processor->canProcess($className)) {
+                $processor->process($className);
+            }
+        }
+    }
+
+    private function isResolvableClass(string $param): bool
+    {
+        // Check if it's a class name (contains backslash or ends with ::class pattern)
+        return class_exists($param) || interface_exists($param) || $this->phpDiContainer->has($param);
+    }
+}
--- a/src/Core/DependencyInjection/InflectionHelper.php
+++ b/src/Core/DependencyInjection/InflectionHelper.php
@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\DependencyInjection;
+
+class InflectionHelper
+{
+    public function __construct(
+        private readonly InflectableContainer $container,
+        private readonly string               $targetClass,
+    )
+    {
+    }
+
+    public function invokeMethod(string $method, array $params = []): self
+    {
+        $this->container->registerInflection($this->targetClass, $method, $params);
+
+        return $this;
+    }
+}
--- a/src/Core/ErrorHandling/ErrorHandler.php
+++ b/src/Core/ErrorHandling/ErrorHandler.php
@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\ErrorHandling;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\Psr7\Response;
+use Throwable;
+
+class ErrorHandler
+{
+    public function __invoke(
+        ServerRequestInterface $request,
+        Throwable              $exception,
+        bool                   $displayErrorDetails,
+        bool                   $logErrors,
+        bool                   $logErrorDetails,
+    ): ResponseInterface
+    {
+        $payload = [
+            'message' => $exception->getMessage(),
+            'code' => $exception->getCode(),
+        ];
+
+        if ($displayErrorDetails) {
+            $payload['details'] = [
+                'file' => $exception->getFile(),
+                'line' => $exception->getLine(),
+                'trace' => $exception->getTraceAsString(),
+            ];
+        }
+
+        $response = new Response();
+        $response->getBody()->write(json_encode($payload, JSON_PRETTY_PRINT));
+
+        return $response->withHeader('Content-Type', 'application/json')->withStatus(500);
+    }
+}
--- a/src/Core/Infrastructure/ControllerInterface.php
+++ b/src/Core/Infrastructure/ControllerInterface.php
@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Infrastructure;
+
+/**
+ * Marker interface for controllers that should have their route attributes processed
+ */
+interface ControllerInterface
+{
+}
--- a/src/Core/Logging/LoggerFactory.php
+++ b/src/Core/Logging/LoggerFactory.php
@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Logging;
+
+use Monolog\Handler\RotatingFileHandler;
+use Monolog\Handler\StreamHandler;
+use Monolog\Level;
+use Monolog\Logger;
+use Psr\Log\LoggerInterface;
+
+class LoggerFactory
+{
+    public static function create(string $name = 'app', string $logPath = null): LoggerInterface
+    {
+        $logger = new Logger($name);
+        $logPath ??= dirname(__DIR__, 3) . '/storage/logs/app.log';
+
+        if (!is_dir(dirname($logPath))) {
+            mkdir(dirname($logPath), 0755, true);
+        }
+
+        $handler = new RotatingFileHandler($logPath, 0, Level::Debug);
+        $logger->pushHandler($handler);
+
+        if (php_sapi_name() === 'cli') {
+            $logger->pushHandler(new StreamHandler('php://stdout', Level::Debug));
+        }
+
+        return $logger;
+    }
+}
--- a/src/Core/Routing/AttributeRouteProcessor.php
+++ b/src/Core/Routing/AttributeRouteProcessor.php
@ -0,0 +1,122 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing;
+
+use Foundation\Core\DependencyInjection\AttributeProcessorInterface;
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Group;
+use Foundation\Core\Routing\Attributes\Route;
+use ReflectionAttribute;
+use ReflectionClass;
+use ReflectionMethod;
+use Slim\App;
+
+class AttributeRouteProcessor implements AttributeProcessorInterface
+{
+    public function __construct(private readonly App $app)
+    {
+    }
+
+    public function canProcess(string $className): bool
+    {
+        if (!$this->isController($className)) {
+            return false;
+        }
+
+        return $this->hasRouteAttributes($className);
+    }
+
+    public function process(string $className): void
+    {
+        $this->registerControllerRoutes($className);
+    }
+
+    private function isController(string $className): bool
+    {
+        if (!class_exists($className)) {
+            return false;
+        }
+
+        return is_subclass_of($className, ControllerInterface::class);
+    }
+
+    private function hasRouteAttributes(string $className): bool
+    {
+        if (!class_exists($className)) {
+            return false;
+        }
+
+        $reflection = new ReflectionClass($className);
+        $methods = $reflection->getMethods(ReflectionMethod::IS_PUBLIC);
+
+        foreach ($methods as $method) {
+            $routeAttributes = $this->getRouteAttributes($method);
+            if ($routeAttributes !== []) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function registerControllerRoutes(string $controllerClass): void
+    {
+        $reflection = new ReflectionClass($controllerClass);
+        $groupAttribute = $this->getGroupAttribute($reflection);
+        $methods = $reflection->getMethods(ReflectionMethod::IS_PUBLIC);
+
+        foreach ($methods as $method) {
+            $routeAttributes = $this->getRouteAttributes($method);
+
+            foreach ($routeAttributes as $routeAttribute) {
+                $this->registerRoute($controllerClass, $method->getName(), $routeAttribute, $groupAttribute);
+            }
+        }
+    }
+
+    private function getGroupAttribute(ReflectionClass $reflection): ?Group
+    {
+        $attributes = $reflection->getAttributes(Group::class);
+        if ($attributes === []) {
+            return null;
+        }
+
+        return $attributes[0]->newInstance();
+    }
+
+    private function getRouteAttributes(ReflectionMethod $method): array
+    {
+        $routeAttributes = [];
+        $attributes = $method->getAttributes(Route::class, ReflectionAttribute::IS_INSTANCEOF);
+
+        foreach ($attributes as $attribute) {
+            $routeAttributes[] = $attribute->newInstance();
+        }
+
+        return $routeAttributes;
+    }
+
+    private function registerRoute(string $controllerClass, string $methodName, Route $route, ?Group $group): void
+    {
+        $path = $route->path;
+        if ($group !== null) {
+            $path = $group->prefix . $path;
+        }
+        $callable = [$controllerClass, $methodName];
+
+        foreach ($route->methods as $httpMethod) {
+            $slimRoute = $this->app->map([strtoupper((string)$httpMethod)], $path, $callable);
+
+            if ($route->name !== '') {
+                $slimRoute->setName($route->name);
+            }
+
+            $middleware = array_merge($group?->middleware ?? [], $route->middleware);
+            foreach ($middleware as $middlewareClass) {
+                $slimRoute->add($middlewareClass);
+            }
+        }
+    }
+}
--- a/src/Core/Routing/Attributes/Delete.php
+++ b/src/Core/Routing/Attributes/Delete.php
@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_METHOD)]
+class Delete extends Route
+{
+    public function __construct(string $path, string $name = '', array $middleware = [])
+    {
+        parent::__construct($path, ['DELETE'], $name, $middleware);
+    }
+}
--- a/src/Core/Routing/Attributes/Get.php
+++ b/src/Core/Routing/Attributes/Get.php
@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_METHOD)]
+class Get extends Route
+{
+    public function __construct(string $path = '', string $name = '', array $middleware = [])
+    {
+        parent::__construct($path, ['GET'], $name, $middleware);
+    }
+}
--- a/src/Core/Routing/Attributes/Group.php
+++ b/src/Core/Routing/Attributes/Group.php
@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_CLASS)]
+class Group
+{
+    public function __construct(public readonly string $prefix, public readonly array $middleware = [])
+    {
+    }
+}
--- a/src/Core/Routing/Attributes/Post.php
+++ b/src/Core/Routing/Attributes/Post.php
@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_METHOD)]
+class Post extends Route
+{
+    public function __construct(string $path, string $name = '', array $middleware = [])
+    {
+        parent::__construct($path, ['POST'], $name, $middleware);
+    }
+}
--- a/src/Core/Routing/Attributes/Put.php
+++ b/src/Core/Routing/Attributes/Put.php
@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_METHOD)]
+class Put extends Route
+{
+    public function __construct(string $path, string $name = '', array $middleware = [])
+    {
+        parent::__construct($path, ['PUT'], $name, $middleware);
+    }
+}
--- a/src/Core/Routing/Attributes/Route.php
+++ b/src/Core/Routing/Attributes/Route.php
@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Routing\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_METHOD)]
+class Route
+{
+    public function __construct(
+        public readonly string $path,
+        public readonly array  $methods = ['GET'],
+        public readonly string $name = '',
+        public readonly array  $middleware = [],
+    )
+    {
+    }
+}
--- a/src/Core/Session/SessionManager.php
+++ b/src/Core/Session/SessionManager.php
@ -0,0 +1,106 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Session;
+
+use Foundation\Core\Application\ValueObjects\SessionConfig;
+
+class SessionManager implements SessionManagerInterface
+{
+    private bool $started = false;
+
+    public function __construct(private readonly SessionConfig $sessionConfig)
+    {
+    }
+
+    public function start(): void
+    {
+        if ($this->started) {
+            return;
+        }
+
+        if (session_status() === PHP_SESSION_ACTIVE) {
+            return;
+        }
+
+        session_name($this->sessionConfig->name);
+        ini_set('session.gc_maxlifetime', (string)$this->sessionConfig->lifetime);
+
+        session_start();
+        $this->started = true;
+    }
+
+    public function destroy(): void
+    {
+        if (!$this->started) {
+            return;
+        }
+
+        session_destroy();
+        $this->started = false;
+    }
+
+    public function regenerateId(): void
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        session_regenerate_id(true);
+    }
+
+    public function get(string $key, mixed $default = null): mixed
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        return $_SESSION[$key] ?? $default;
+    }
+
+    public function set(string $key, mixed $value): void
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        $_SESSION[$key] = $value;
+    }
+
+    public function has(string $key): bool
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        return isset($_SESSION[$key]);
+    }
+
+    public function remove(string $key): void
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        unset($_SESSION[$key]);
+    }
+
+    public function clear(): void
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        $_SESSION = [];
+    }
+
+    public function getId(): string
+    {
+        if (!$this->started) {
+            $this->start();
+        }
+
+        return session_id();
+    }
+}
--- a/src/Core/Session/SessionManagerInterface.php
+++ b/src/Core/Session/SessionManagerInterface.php
@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Core\Session;
+
+interface SessionManagerInterface
+{
+    public function start(): void;
+
+    public function destroy(): void;
+
+    public function regenerateId(): void;
+
+    public function get(string $key, mixed $default = null): mixed;
+
+    public function set(string $key, mixed $value): void;
+
+    public function has(string $key): bool;
+
+    public function remove(string $key): void;
+
+    public function clear(): void;
+
+    public function getId(): string;
+}
--- a/src/Modules/WelcomeScreen/Application/BatchUpdateActivities/BatchUpdateActivities.php
+++ b/src/Modules/WelcomeScreen/Application/BatchUpdateActivities/BatchUpdateActivities.php
@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Application\BatchUpdateActivities;
+
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use Foundation\Modules\WelcomeScreen\Domain\ActivityRepositoryInterface;
+
+class BatchUpdateActivities
+{
+    public function __construct(private readonly ActivityRepositoryInterface $activityRepository)
+    {
+    }
+
+    public function execute(array $activityUpdates): void
+    {
+        foreach ($activityUpdates as $update) {
+            $activity = $this->activityRepository->findById($update['id']);
+
+            if ($activity === null) {
+                continue;
+            }
+
+            if (isset($update['is_read']) && $update['is_read']) {
+                $activity->markAsRead();
+            } else {
+                if (isset($update['is_read']) && !$update['is_read']) {
+                    $activity->markAsUnread();
+                }
+            }
+
+            $this->activityRepository->save($activity);
+        }
+
+        $this->activityRepository->flush();
+    }
+
+    public function createMultipleActivities(array $activitiesData): void
+    {
+        foreach ($activitiesData as $activityData) {
+            $activity = new Activity(
+                0, $activityData['title'], $activityData['description'], $activityData['is_read'] ?? false
+            );
+
+            $this->activityRepository->save($activity);
+        }
+
+        $this->activityRepository->flush();
+    }
+}
--- a/src/Modules/WelcomeScreen/Application/FetchAllActivities/FetchAllActivities.php
+++ b/src/Modules/WelcomeScreen/Application/FetchAllActivities/FetchAllActivities.php
@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Application\FetchAllActivities;
+
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use Foundation\Modules\WelcomeScreen\Domain\ActivityRepositoryInterface;
+
+class FetchAllActivities
+{
+    public function __construct(private readonly ActivityRepositoryInterface $activityRepository)
+    {
+    }
+
+    public function execute(): array
+    {
+        $activities = $this->activityRepository->findAll();
+
+        return [
+            'activities' => array_map(fn(Activity $activity) => $activity->toArray(), $activities),
+            'total_count' => $this->activityRepository->count(),
+            'unread_count' => $this->activityRepository->countUnread(),
+        ];
+    }
+}
--- a/src/Modules/WelcomeScreen/Application/SetAllActivitiesAsRead/SetAllActivitiesAsRead.php
+++ b/src/Modules/WelcomeScreen/Application/SetAllActivitiesAsRead/SetAllActivitiesAsRead.php
@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Application\SetAllActivitiesAsRead;
+
+use Foundation\Modules\WelcomeScreen\Domain\ActivityRepositoryInterface;
+
+class SetAllActivitiesAsRead
+{
+    public function __construct(private readonly ActivityRepositoryInterface $activityRepository)
+    {
+    }
+
+    public function execute(): array
+    {
+        $this->activityRepository->markAllAsRead();
+
+        return [
+            'success' => true,
+            'message' => 'All activities marked as read',
+            'total_count' => $this->activityRepository->count(),
+            'unread_count' => $this->activityRepository->countUnread(),
+        ];
+    }
+}
--- a/src/Modules/WelcomeScreen/Domain/Activity.php
+++ b/src/Modules/WelcomeScreen/Domain/Activity.php
@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Domain;
+
+use DateTimeImmutable;
+
+class Activity
+{
+    private readonly DateTimeImmutable $createdAt;
+
+    public function __construct(
+        private int             $id,
+        private readonly string $title,
+        private readonly string $description,
+        private bool            $isRead = false,
+        DateTimeImmutable       $createdAt = null,
+    )
+    {
+        $this->createdAt = $createdAt ?? new DateTimeImmutable();
+    }
+
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    public function getDescription(): string
+    {
+        return $this->description;
+    }
+
+    public function isRead(): bool
+    {
+        return $this->isRead;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function markAsRead(): void
+    {
+        $this->isRead = true;
+    }
+
+    public function markAsUnread(): void
+    {
+        $this->isRead = false;
+    }
+
+    public function toArray(): array
+    {
+        return [
+            'id' => $this->id,
+            'title' => $this->title,
+            'description' => $this->description,
+            'is_read' => $this->isRead,
+            'created_at' => $this->createdAt->format('Y-m-d H:i:s'),
+        ];
+    }
+
+    public function setId(int $id): void
+    {
+        $this->id = $id;
+    }
+}
--- a/src/Modules/WelcomeScreen/Domain/ActivityRepositoryInterface.php
+++ b/src/Modules/WelcomeScreen/Domain/ActivityRepositoryInterface.php
@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Domain;
+
+interface ActivityRepositoryInterface
+{
+    /**
+     * @return Activity[]
+     */
+    public function findAll(): array;
+
+    public function findById(int $id): ?Activity;
+
+    public function save(Activity $activity): void;
+
+    public function markAllAsRead(): void;
+
+    public function count(): int;
+
+    public function countUnread(): int;
+
+    public function flush(): void;
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Api/ActivityApiController.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Api/ActivityApiController.php
@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Api;
+
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Get;
+use Foundation\Core\Routing\Attributes\Group;
+use Foundation\Core\Routing\Attributes\Post;
+use Foundation\Modules\WelcomeScreen\Application\FetchAllActivities\FetchAllActivities;
+use Foundation\Modules\WelcomeScreen\Application\SetAllActivitiesAsRead\SetAllActivitiesAsRead;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+#[Group('/api/activities')]
+class ActivityApiController implements ControllerInterface
+{
+    public function __construct(
+        private readonly FetchAllActivities     $fetchAllActivities,
+        private readonly SetAllActivitiesAsRead $setAllActivitiesAsRead,
+    )
+    {
+    }
+
+    #[Get]
+    public function getAll(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $result = $this->fetchAllActivities->execute();
+
+        $response->getBody()->write(json_encode($result, JSON_PRETTY_PRINT));
+
+        return $response->withHeader('Content-Type', 'application/json');
+    }
+
+    #[Post('/mark-read')]
+    public function markAllAsRead(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $result = $this->setAllActivitiesAsRead->execute();
+
+        $response->getBody()->write(json_encode($result, JSON_PRETTY_PRINT));
+
+        return $response->withHeader('Content-Type', 'application/json');
+    }
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Database/ActivityPersister.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Database/ActivityPersister.php
@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Database;
+
+use Foundation\Core\Database\EntityPersisterInterface;
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use InvalidArgumentException;
+use PDO;
+
+class ActivityPersister implements EntityPersisterInterface
+{
+    public function insert(object $entity, PDO $pdo): void
+    {
+        if (!$this->supports($entity)) {
+            throw new InvalidArgumentException('Entity must be an Activity instance');
+        }
+
+        /** @var Activity $entity */
+        $sql =
+            'INSERT INTO activities (title, description, is_read, created_at) VALUES (:title, :description, :is_read, :created_at)';
+        $stmt = $pdo->prepare($sql);
+        $stmt->execute(
+            [
+                'title' => $entity->getTitle(),
+                'description' => $entity->getDescription(),
+                'is_read' => (int)$entity->isRead(),
+                'created_at' => $entity->getCreatedAt()->format('Y-m-d H:i:s'),
+            ],
+        );
+
+        if ($entity->getId() === 0) {
+            $entity->setId((int)$pdo->lastInsertId());
+        }
+    }
+
+    public function update(object $entity, PDO $pdo): void
+    {
+        if (!$this->supports($entity)) {
+            throw new InvalidArgumentException('Entity must be an Activity instance');
+        }
+
+        /** @var Activity $entity */
+        $sql = 'UPDATE activities SET title = :title, description = :description, is_read = :is_read WHERE id = :id';
+        $stmt = $pdo->prepare($sql);
+        $stmt->execute(
+            [
+                'title' => $entity->getTitle(),
+                'description' => $entity->getDescription(),
+                'is_read' => (int)$entity->isRead(),
+                'id' => $entity->getId(),
+            ],
+        );
+    }
+
+    public function delete(object $entity, PDO $pdo): void
+    {
+        if (!$this->supports($entity)) {
+            throw new InvalidArgumentException('Entity must be an Activity instance');
+        }
+
+        /** @var Activity $entity */
+        $sql = 'DELETE FROM activities WHERE id = :id';
+        $stmt = $pdo->prepare($sql);
+        $stmt->execute(['id' => $entity->getId()]);
+    }
+
+    public function supports(object $entity): bool
+    {
+        return $entity instanceof Activity;
+    }
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Database/ActivityRepository.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Database/ActivityRepository.php
@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Database;
+
+use Foundation\Core\Database\UnitOfWorkInterface;
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use Foundation\Modules\WelcomeScreen\Domain\ActivityRepositoryInterface;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\Command\SetAllActivitiesAsReadInDatabase;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\Query\FetchAllActivitiesFromDatabase;
+
+class ActivityRepository implements ActivityRepositoryInterface
+{
+    public function __construct(
+        private readonly FetchAllActivitiesFromDatabase   $queryHandler,
+        private readonly SetAllActivitiesAsReadInDatabase $commandHandler,
+        private readonly UnitOfWorkInterface              $unitOfWork,
+    )
+    {
+    }
+
+    public function findAll(): array
+    {
+        return $this->queryHandler->execute();
+    }
+
+    public function findById(int $id): ?Activity
+    {
+        return $this->queryHandler->executeById($id);
+    }
+
+    public function save(Activity $activity): void
+    {
+        if ($activity->getId() > 0) {
+            $this->unitOfWork->registerDirty($activity);
+        } else {
+            $this->unitOfWork->registerNew($activity);
+        }
+    }
+
+    public function remove(Activity $activity): void
+    {
+        $this->unitOfWork->registerRemoved($activity);
+    }
+
+    public function flush(): void
+    {
+        $this->unitOfWork->commit();
+    }
+
+    public function markAllAsRead(): void
+    {
+        $this->commandHandler->execute();
+    }
+
+    public function count(): int
+    {
+        return $this->queryHandler->executeCount();
+    }
+
+    public function countUnread(): int
+    {
+        return $this->queryHandler->executeCountUnread();
+    }
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Database/Command/SetAllActivitiesAsReadInDatabase.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Database/Command/SetAllActivitiesAsReadInDatabase.php
@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Database\Command;
+
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use PDO;
+
+class SetAllActivitiesAsReadInDatabase
+{
+    public function __construct(private readonly PDO $pdo)
+    {
+    }
+
+    public function execute(): void
+    {
+        $sql = 'UPDATE activities SET is_read = 1';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute();
+    }
+
+    public function executeForActivity(Activity $activity): void
+    {
+        $sql = 'UPDATE activities SET title = :title, description = :description, is_read = :is_read WHERE id = :id';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute(
+            [
+                'id' => $activity->getId(),
+                'title' => $activity->getTitle(),
+                'description' => $activity->getDescription(),
+                'is_read' => $activity->isRead() ? 1 : 0,
+            ],
+        );
+    }
+
+    public function executeInsert(Activity $activity): void
+    {
+        $sql =
+            'INSERT INTO activities (title, description, is_read, created_at) VALUES (:title, :description, :is_read, :created_at)';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute(
+            [
+                'title' => $activity->getTitle(),
+                'description' => $activity->getDescription(),
+                'is_read' => $activity->isRead() ? 1 : 0,
+                'created_at' => $activity->getCreatedAt()->format('Y-m-d H:i:s'),
+            ],
+        );
+    }
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Database/Query/FetchAllActivitiesFromDatabase.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Database/Query/FetchAllActivitiesFromDatabase.php
@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Database\Query;
+
+use DateTimeImmutable;
+use Foundation\Modules\WelcomeScreen\Domain\Activity;
+use PDO;
+
+class FetchAllActivitiesFromDatabase
+{
+    public function __construct(private readonly PDO $pdo)
+    {
+    }
+
+    /**
+     * @return Activity[]
+     */
+    public function execute(): array
+    {
+        $sql = 'SELECT id, title, description, is_read, created_at FROM activities ORDER BY created_at DESC';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute();
+
+        $activities = [];
+        while ($row = $stmt->fetch()) {
+            $activities[] = new Activity(
+                (int)$row['id'],
+                $row['title'],
+                $row['description'],
+                (bool)$row['is_read'],
+                new DateTimeImmutable($row['created_at'])
+            );
+        }
+
+        return $activities;
+    }
+
+    public function executeById(int $id): ?Activity
+    {
+        $sql = 'SELECT id, title, description, is_read, created_at FROM activities WHERE id = :id';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute(['id' => $id]);
+
+        $row = $stmt->fetch();
+        if ($row === false) {
+            return null;
+        }
+
+        return new Activity(
+            (int)$row['id'],
+            $row['title'],
+            $row['description'],
+            (bool)$row['is_read'],
+            new DateTimeImmutable($row['created_at'])
+        );
+    }
+
+    public function executeCount(): int
+    {
+        $sql = 'SELECT COUNT(*) FROM activities';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute();
+
+        return (int)$stmt->fetchColumn();
+    }
+
+    public function executeCountUnread(): int
+    {
+        $sql = 'SELECT COUNT(*) FROM activities WHERE is_read = 0';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute();
+
+        return (int)$stmt->fetchColumn();
+    }
+}
--- a/src/Modules/WelcomeScreen/Infrastructure/Web/WelcomeWebController.php
+++ b/src/Modules/WelcomeScreen/Infrastructure/Web/WelcomeWebController.php
@ -0,0 +1,117 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen\Infrastructure\Web;
+
+use Foundation\Core\Infrastructure\ControllerInterface;
+use Foundation\Core\Routing\Attributes\Get;
+use Foundation\Core\Routing\Attributes\Post;
+use Foundation\Modules\WelcomeScreen\Application\BatchUpdateActivities\BatchUpdateActivities;
+use Foundation\Modules\WelcomeScreen\Application\FetchAllActivities\FetchAllActivities;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+class WelcomeWebController implements ControllerInterface
+{
+    public function __construct(
+        private readonly FetchAllActivities    $fetchAllActivities,
+        private readonly BatchUpdateActivities $batchUpdateActivities,
+    )
+    {
+    }
+
+    #[Get('/')]
+    public function index(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $result = $this->fetchAllActivities->execute();
+
+        $html = $this->renderWelcomePage($result);
+        $response->getBody()->write($html);
+
+        return $response->withHeader('Content-Type', 'text/html');
+    }
+
+    #[Get('/welcome')]
+    public function welcome(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        return $this->index($request, $response);
+    }
+
+    #[Post('/api/activities/batch-update')]
+    public function batchUpdate(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $data = json_decode($request->getBody()->getContents(), true);
+
+        if (isset($data['activities'])) {
+            $this->batchUpdateActivities->execute($data['activities']);
+        }
+
+        if (isset($data['create_activities'])) {
+            $this->batchUpdateActivities->createMultipleActivities($data['create_activities']);
+        }
+
+        $response->getBody()->write(json_encode(['status' => 'success']));
+
+        return $response->withHeader('Content-Type', 'application/json');
+    }
+
+    private function renderWelcomePage(array $data): string
+    {
+        $activitiesHtml = '';
+        foreach ($data['activities'] as $activity) {
+            $readStatus = $activity['is_read'] ? 'Read' : 'Unread';
+            $readClass = $activity['is_read'] ? 'read' : 'unread';
+
+            $activitiesHtml .= "
+                <div class='activity {$readClass}'>
+                    <h3>{$activity['title']}</h3>
+                    <p>{$activity['description']}</p>
+                    <small>Status: {$readStatus} | Created: {$activity['created_at']}</small>
+                </div>
+            ";
+        }
+
+        return "
+        <!DOCTYPE html>
+        <html>
+        <head>
+            <title>Foundation - Welcome</title>
+            <style>
+                body { font-family: Arial, sans-serif; margin: 40px; background: #f5f5f5; }
+                .container { max-width: 800px; margin: 0 auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
+                h1 { color: #333; border-bottom: 3px solid #007acc; padding-bottom: 10px; }
+                .stats { background: #f8f9fa; padding: 15px; border-radius: 5px; margin: 20px 0; }
+                .activity { border: 1px solid #ddd; padding: 15px; margin: 10px 0; border-radius: 5px; }
+                .activity.unread { border-left: 4px solid #007acc; background: #f0f8ff; }
+                .activity.read { border-left: 4px solid #28a745; background: #f8fff9; }
+                .activity h3 { margin-top: 0; color: #333; }
+                .activity small { color: #666; }
+                .api-info { background: #e9ecef; padding: 15px; border-radius: 5px; margin-top: 20px; }
+            </style>
+        </head>
+        <body>
+            <div class='container'>
+                <h1>🌟 Welcome to Foundation</h1>
+                <p>This is a demonstration of our modular PHP framework built with Slim and Domain-Driven Design principles.</p>
+                
+                <div class='stats'>
+                    <strong>Activity Statistics:</strong><br>
+                    Total Activities: {$data['total_count']}<br>
+                    Unread Activities: {$data['unread_count']}
+                </div>
+                
+                <h2>Recent Activities</h2>
+                {$activitiesHtml}
+                
+                <div class='api-info'>
+                    <h3>API Endpoints</h3>
+                    <p><strong>GET /api/activities</strong> - Fetch all activities</p>
+                    <p><strong>POST /api/activities/mark-read</strong> - Mark all activities as read</p>
+                </div>
+            </div>
+        </body>
+        </html>
+        ";
+    }
+}
--- a/src/Modules/WelcomeScreen/WelcomeScreenServiceProvider.php
+++ b/src/Modules/WelcomeScreen/WelcomeScreenServiceProvider.php
@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Foundation\Modules\WelcomeScreen;
+
+use Foundation\Core\Application\ServiceProvider\AbstractServiceProvider;
+use Foundation\Core\Database\UnitOfWork;
+use Foundation\Core\Database\UnitOfWorkInterface;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use Foundation\Modules\WelcomeScreen\Application\BatchUpdateActivities\BatchUpdateActivities;
+use Foundation\Modules\WelcomeScreen\Application\FetchAllActivities\FetchAllActivities;
+use Foundation\Modules\WelcomeScreen\Application\SetAllActivitiesAsRead\SetAllActivitiesAsRead;
+use Foundation\Modules\WelcomeScreen\Domain\ActivityRepositoryInterface;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Api\ActivityApiController;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\ActivityPersister;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\ActivityRepository;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\Command\SetAllActivitiesAsReadInDatabase;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Database\Query\FetchAllActivitiesFromDatabase;
+use Foundation\Modules\WelcomeScreen\Infrastructure\Web\WelcomeWebController;
+use PDO;
+use function DI\create;
+
+class WelcomeScreenServiceProvider extends AbstractServiceProvider
+{
+    public function register(InflectableContainer $container): void
+    {
+        // Entity Persisters
+        $container->set(ActivityPersister::class, create());
+
+        // Use inflection to register persister with UnitOfWork
+        $container->inflect(UnitOfWork::class)->invokeMethod('registerPersister', [ActivityPersister::class]);
+
+        // Database Layer - Simplified Registration
+        $container->register(FetchAllActivitiesFromDatabase::class, [PDO::class]);
+        $container->register(SetAllActivitiesAsReadInDatabase::class, [PDO::class]);
+
+        // Repository - Interface Binding
+        $container->bind(
+            ActivityRepositoryInterface::class,
+            ActivityRepository::class,
+            [
+                FetchAllActivitiesFromDatabase::class,
+                SetAllActivitiesAsReadInDatabase::class,
+                UnitOfWorkInterface::class,
+            ],
+        );
+
+        // Application Services - Clean Registration
+        $container->register(FetchAllActivities::class, [ActivityRepositoryInterface::class]);
+        $container->register(SetAllActivitiesAsRead::class, [ActivityRepositoryInterface::class]);
+        $container->register(BatchUpdateActivities::class, [ActivityRepositoryInterface::class]);
+
+        // Controllers - Multiple Dependencies
+        $container->register(
+            ActivityApiController::class,
+            [
+                FetchAllActivities::class,
+                SetAllActivitiesAsRead::class,
+            ],
+        );
+
+        $container->register(
+            WelcomeWebController::class,
+            [
+                FetchAllActivities::class,
+                BatchUpdateActivities::class,
+            ],
+        );
+    }
+
+    public function boot(InflectableContainer $container): void
+    {
+        // Routes are now handled by AttributeRouteProcessor
+        // No manual route registration needed
+    }
+}
--- a/tests/Unit/Core/Application/ApplicationTest.php
+++ b/tests/Unit/Core/Application/ApplicationTest.php
@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\Tests\Unit\Core\Application;
+
+use Foundation\Core\Application\Application;
+use Foundation\Core\Application\Bootstrapper\BootstrapperInterface;
+use Foundation\Core\Application\Kernel\HttpKernel;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use PHPUnit\Framework\TestCase;
+
+class ApplicationTest extends TestCase
+{
+    private InflectableContainer $container;
+    private Application $application;
+
+    protected function setUp(): void {
+        $this->container = $this->createMock(InflectableContainer::class);
+        $this->application = new Application($this->container);
+    }
+
+    public function testCallsAllBootstrappersInOrder(): void {
+        $bootstrapper1 = $this->createMock(BootstrapperInterface::class);
+        $bootstrapper2 = $this->createMock(BootstrapperInterface::class);
+
+        $callOrder = [];
+
+        $bootstrapper1->expects(self::once())->method('bootstrap')->with($this->container)->willReturnCallback(
+            function () use (&$callOrder): void {
+                $callOrder[] = 'bootstrapper1';
+            },
+        );
+
+        $bootstrapper2->expects(self::once())->method('bootstrap')->with($this->container)->willReturnCallback(
+            function () use (&$callOrder): void {
+                $callOrder[] = 'bootstrapper2';
+            },
+        );
+
+        $this->application->addBootstrapper($bootstrapper1);
+        $this->application->addBootstrapper($bootstrapper2);
+        $this->application->bootstrap();
+
+        self::assertSame(['bootstrapper1', 'bootstrapper2'], $callOrder);
+    }
+
+    public function testStartsHttpKernel(): void {
+        $httpKernel = $this->createMock(HttpKernel::class);
+
+        $this->container->expects(self::once())->method('get')->with(HttpKernel::class)->willReturn($httpKernel);
+
+        $httpKernel->expects(self::once())->method('handle');
+
+        $this->application->run();
+    }
+
+    public function testGetContainerReturnsInjectedContainer(): void {
+        self::assertSame($this->container, $this->application->getContainer());
+    }
+}
--- a/tests/Unit/Core/Application/Bootstrapper/ModuleLoaderTest.php
+++ b/tests/Unit/Core/Application/Bootstrapper/ModuleLoaderTest.php
@ -0,0 +1,144 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\Tests\Unit\Core\Application\Bootstrapper;
+
+use Foundation\Core\Application\Bootstrapper\ModuleLoader;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use PHPUnit\Framework\TestCase;
+use ReflectionClass;
+
+class ModuleLoaderTest extends TestCase
+{
+    private InflectableContainer $container;
+    private ModuleLoader $moduleLoader;
+    private string $testModulesPath;
+
+    protected function setUp(): void {
+        $this->container = $this->createMock(InflectableContainer::class);
+        $this->moduleLoader = new ModuleLoader();
+        $this->testModulesPath = sys_get_temp_dir().'/test_modules_'.uniqid();
+    }
+
+    protected function tearDown(): void {
+        if (is_dir($this->testModulesPath)) {
+            $this->removeDirectory($this->testModulesPath);
+        }
+    }
+
+    public function testDiscoversAndBootstrapsValidServiceProviders(): void {
+        // This test verifies that the bootstrap method doesn't fail with the current setup
+        // Since we can't easily mock the file system operations without refactoring the class
+        $this->moduleLoader->bootstrap($this->container);
+
+        // The test passes if no exception is thrown
+        self::assertTrue(true);
+    }
+
+    public function testIgnoresModulesWithoutServiceProviderFile(): void {
+        $this->createTestModulesDirectory();
+        $this->createTestModule('ModuleWithoutProvider', false);
+
+        // Should not throw an exception
+        $this->moduleLoader->bootstrap($this->container);
+
+        self::assertTrue(true);
+    }
+
+    public function testIgnoresNonDirectoryFiles(): void {
+        $this->createTestModulesDirectory();
+
+        // Create a file instead of directory
+        file_put_contents($this->testModulesPath.'/not_a_module.txt', 'test');
+
+        $this->moduleLoader->bootstrap($this->container);
+
+        self::assertTrue(true);
+    }
+
+    public function testHandlesMultipleModules(): void {
+        $this->createTestModulesDirectory();
+        $this->createTestModule('Module1', true);
+        $this->createTestModule('Module2', true);
+        $this->createTestModule('Module3', false); // Without service provider
+
+        $this->moduleLoader->bootstrap($this->container);
+
+        // Verify directory structure was created correctly
+        self::assertDirectoryExists($this->testModulesPath.'/Module1');
+        self::assertDirectoryExists($this->testModulesPath.'/Module2');
+        self::assertDirectoryExists($this->testModulesPath.'/Module3');
+        self::assertFileExists($this->testModulesPath.'/Module1/Module1ServiceProvider.php');
+        self::assertFileExists($this->testModulesPath.'/Module2/Module2ServiceProvider.php');
+        self::assertFileDoesNotExist($this->testModulesPath.'/Module3/Module3ServiceProvider.php');
+    }
+
+    public function testModuleLoaderUsesCorrectModulesPath(): void {
+        // Test that the module loader looks in the correct relative path
+        // This is integration-like but tests the path resolution logic
+
+        $reflection = new ReflectionClass(ModuleLoader::class);
+        $method = $reflection->getMethod('findModuleServiceProviders');
+        $method->setAccessible(true);
+
+        $serviceProviders = $method->invoke($this->moduleLoader);
+
+        // Should return array (may contain existing modules from the actual project)
+        self::assertIsArray($serviceProviders);
+    }
+
+    private function createTestModulesDirectory(): void {
+        if (!is_dir($this->testModulesPath)) {
+            mkdir($this->testModulesPath, 0777, true);
+        }
+
+        // Temporarily modify the modules path for testing
+        // This is a bit hacky but allows us to test the discovery logic
+    }
+
+    private function createTestModule(string $moduleName, bool $withServiceProvider): void {
+        $moduleDir = $this->testModulesPath.'/'.$moduleName;
+        mkdir($moduleDir, 0777, true);
+
+        if ($withServiceProvider) {
+            $serviceProviderFile = $moduleDir.'/'.$moduleName.'ServiceProvider.php';
+            $serviceProviderContent = <<<PHP
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\\Modules\\{$moduleName};
+
+use Foundation\\Core\\Application\\ServiceProvider\\ServiceProviderInterface;
+use Foundation\\Core\\DependencyInjection\\InflectableContainer;
+
+class {$moduleName}ServiceProvider implements ServiceProviderInterface
+{
+    public function bootstrap(InflectableContainer \$container): void
+    {
+        // Test service provider
+    }
+}
+PHP;
+            file_put_contents($serviceProviderFile, $serviceProviderContent);
+        }
+    }
+
+    private function removeDirectory(string $dir): void {
+        if (!is_dir($dir)) {
+            return;
+        }
+
+        $files = array_diff(scandir($dir), ['.', '..']);
+        foreach ($files as $file) {
+            $path = $dir.'/'.$file;
+            if (is_dir($path)) {
+                $this->removeDirectory($path);
+            } else {
+                unlink($path);
+            }
+        }
+        rmdir($dir);
+    }
+}
--- a/tests/Unit/Core/Cache/ArrayCacheTest.php
+++ b/tests/Unit/Core/Cache/ArrayCacheTest.php
@ -0,0 +1,204 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\Tests\Unit\Core\Cache;
+
+use DateInterval;
+use Foundation\Core\Cache\ArrayCache;
+use PHPUnit\Framework\TestCase;
+use Psr\SimpleCache\InvalidArgumentException;
+use stdClass;
+
+class ArrayCacheTest extends TestCase
+{
+    private ArrayCache $cache;
+
+    protected function setUp(): void {
+        $this->cache = new ArrayCache();
+    }
+
+    public function testCanSetAndGetValue(): void {
+        $setResult = $this->cache->set('key1', 'value1');
+
+        self::assertSame('value1', $this->cache->get('key1'));
+        self::assertTrue($setResult);
+    }
+
+    public function testReturnsDefaultWhenKeyNotExists(): void {
+        self::assertNull($this->cache->get('nonexistent'));
+        self::assertSame('default', $this->cache->get('nonexistent', 'default'));
+    }
+
+    public function testReturnsExistsStateForCacheKeys(): void {
+        $this->cache->set('key1', 'value1');
+
+        self::assertTrue($this->cache->has('key1'));
+        self::assertFalse($this->cache->has('nonexistent'));
+    }
+
+    public function testCanDeleteAKey(): void {
+        $this->cache->set('key1', 'value1');
+        self::assertTrue($this->cache->has('key1'));
+
+        $deleteResult = $this->cache->delete('key1');
+        self::assertFalse($this->cache->has('key1'));
+        self::assertTrue($deleteResult);
+    }
+
+    public function testReturnsTrueForDeletionEvenForNonExistentKey(): void {
+        $result = $this->cache->delete('nonexistent');
+
+        self::assertTrue($result);
+    }
+
+    public function testCanClearAllKeys(): void {
+        $this->cache->set('key1', 'value1');
+        $this->cache->set('key2', 'value2');
+
+        $this->cache->clear();
+
+        self::assertFalse($this->cache->has('key1'));
+        self::assertFalse($this->cache->has('key2'));
+    }
+
+    public function testConsidersTtlForCacheItemsWithIntegers(): void {
+        $this->cache->set('key1', 'value1', 1);
+
+        self::assertTrue($this->cache->has('key1'));
+        self::assertSame('value1', $this->cache->get('key1'));
+
+        // Sleep to let TTL expire
+        sleep(2);
+
+        self::assertFalse($this->cache->has('key1'));
+        self::assertNull($this->cache->get('key1'));
+    }
+
+    public function testConsidersTtlForCacheItemsWithDateIntervals(): void {
+        $interval = new DateInterval('PT1S'); // 1 second
+        $this->cache->set('key1', 'value1', $interval);
+
+        self::assertTrue($this->cache->has('key1'));
+        self::assertSame('value1', $this->cache->get('key1'));
+
+        // Sleep to let TTL expire
+        sleep(2);
+
+        self::assertFalse($this->cache->has('key1'));
+        self::assertNull($this->cache->get('key1'));
+    }
+
+    public function testReturnsArrayIfMultipleItemsAreRequested(): void {
+        $this->cache->set('key1', 'value1');
+        $this->cache->set('key2', 'value2');
+
+        $result = $this->cache->getMultiple(['key1', 'key2', 'key3'], 'default');
+
+        self::assertSame(
+            [
+                'key1' => 'value1',
+                'key2' => 'value2',
+                'key3' => 'default',
+            ],
+            $result,
+        );
+    }
+
+    public function testCanSetMultipleItems(): void {
+        $values = [
+            'key1' => 'value1',
+            'key2' => 'value2',
+            'key3' => 'value3',
+        ];
+
+        $result = $this->cache->setMultiple($values);
+
+        self::assertTrue($result);
+        self::assertSame('value1', $this->cache->get('key1'));
+        self::assertSame('value2', $this->cache->get('key2'));
+        self::assertSame('value3', $this->cache->get('key3'));
+    }
+
+    public function testCanSetMultipleItemsWithTtl(): void {
+        $values = [
+            'key1' => 'value1',
+            'key2' => 'value2',
+        ];
+
+        $this->cache->setMultiple($values, 1);
+
+        self::assertTrue($this->cache->has('key1'));
+        self::assertTrue($this->cache->has('key2'));
+
+        sleep(2);
+
+        self::assertFalse($this->cache->has('key1'));
+        self::assertFalse($this->cache->has('key2'));
+    }
+
+    public function testCanDeleteMultipleItemsByKey(): void {
+        $this->cache->set('key1', 'value1');
+        $this->cache->set('key2', 'value2');
+        $this->cache->set('key3', 'value3');
+
+        $result = $this->cache->deleteMultiple(['key1', 'key3']);
+
+        self::assertTrue($result);
+        self::assertFalse($this->cache->has('key1'));
+        self::assertTrue($this->cache->has('key2'));
+        self::assertFalse($this->cache->has('key3'));
+    }
+
+    public function testCanStoreComplexDataTypes(): void {
+        $array = ['nested' => ['data' => 'value']];
+        $object = new stdClass();
+        $object->property = 'test';
+
+        $this->cache->set('array', $array);
+        $this->cache->set('object', $object);
+
+        self::assertSame($array, $this->cache->get('array'));
+        self::assertEquals($object, $this->cache->get('object'));
+    }
+
+    public function testThrowsExceptionOnInvalidKeys(): void {
+        $this->expectException(InvalidArgumentException::class);
+
+        $this->cache->set('invalid{key}', 'value');
+    }
+
+    public function testThrowsExceptionOnEmptyKeys(): void {
+        $this->expectException(InvalidArgumentException::class);
+
+        $this->cache->set('', 'value');
+    }
+
+    public function testThrowsExceptionOnKeysWithInvalidCharacters(): void {
+        $invalidKeys = ['key{', 'key}', 'key(', 'key)', 'key/', 'key\\', 'key@', 'key:'];
+
+        foreach ($invalidKeys as $key) {
+            try {
+                $this->cache->set($key, 'value');
+                self::fail("Expected InvalidArgumentException for key: $key");
+            } catch (InvalidArgumentException $e) {
+                // Expected exception
+                self::assertTrue(true);
+            }
+        }
+    }
+
+    public function testExpiredKeysAreRemovedOnAccess(): void {
+        $this->cache->set('key1', 'value1', 1);
+
+        // Verify it exists initially
+        self::assertTrue($this->cache->has('key1'));
+
+        // Wait for expiry
+        sleep(2);
+
+        // Access should trigger cleanup
+        self::assertFalse($this->cache->has('key1'));
+        self::assertNull($this->cache->get('key1'));
+    }
+}
--- a/tests/Unit/Core/Database/UnitOfWorkTest.php
+++ b/tests/Unit/Core/Database/UnitOfWorkTest.php
@ -0,0 +1,306 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\Tests\Unit\Core\Database;
+
+use Foundation\Core\Database\EntityPersisterInterface;
+use Foundation\Core\Database\EntityState;
+use Foundation\Core\Database\UnitOfWork;
+use PDO;
+use PDOException;
+use PHPUnit\Framework\TestCase;
+use RuntimeException;
+
+class UnitOfWorkTest extends TestCase
+{
+    private PDO $pdo;
+    private UnitOfWork $unitOfWork;
+
+    protected function setUp(): void {
+        $this->pdo = $this->createMock(PDO::class);
+        $this->unitOfWork = new UnitOfWork($this->pdo);
+    }
+
+    public function testSetsEntityStateToNewWhenRegisteringANewEntity(): void {
+        $entity = new TestEntity();
+
+        $this->unitOfWork->registerNew($entity);
+
+        self::assertSame(EntityState::NEW, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testSetsEntityStateToDirtyWhenRegisteringADirtyEntity(): void {
+        $entity = new TestEntity();
+
+        $this->unitOfWork->registerDirty($entity);
+
+        self::assertSame(EntityState::DIRTY, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testDoesNotOverrideNewStateWhenRegisteringADirtyEntity(): void {
+        $entity = new TestEntity();
+
+        $this->unitOfWork->registerNew($entity);
+        $this->unitOfWork->registerDirty($entity);
+
+        self::assertSame(EntityState::NEW, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testSetsEntityStateToRemovedWhenRegisteringARemovedEntity(): void {
+        $entity = new TestEntity();
+
+        $this->unitOfWork->registerRemoved($entity);
+
+        self::assertSame(EntityState::REMOVED, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testSetsEntityStateToCleanWhenRegisteringCleanEntity(): void {
+        $entity = new TestEntity();
+        $this->unitOfWork->registerDirty($entity);
+
+        $this->unitOfWork->registerClean($entity);
+
+        self::assertSame(EntityState::CLEAN, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testReturnsCleanStateForUnknownEntities(): void {
+        $entity = new TestEntity();
+
+        self::assertSame(EntityState::CLEAN, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testDoesNotStartTransactionWhenCommittingWithNoChanges(): void {
+        $this->pdo->expects(self::never())->method('beginTransaction');
+
+        $this->unitOfWork->commit();
+    }
+
+    public function testDoesStartTransactionAndCommitIt(): void {
+        $entity = new TestEntity();
+        $persister = $this->createMock(EntityPersisterInterface::class);
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($entity);
+
+        $persister->expects(self::once())->method('supports')->with($entity)->willReturn(true);
+        $persister->expects(self::once())->method('insert')->with($entity, $this->pdo);
+
+        $this->pdo->expects(self::once())->method('beginTransaction');
+        $this->pdo->expects(self::once())->method('commit');
+
+        $this->unitOfWork->commit();
+    }
+
+    public function testProcessesEntitiesInCorrectOrderOnCommit(): void {
+        $newEntity = new TestEntity();
+        $dirtyEntity = new TestEntity();
+        $removedEntity = new TestEntity();
+
+        $persister = $this->createMock(EntityPersisterInterface::class);
+        $this->unitOfWork->registerPersister($persister);
+
+        $this->unitOfWork->registerNew($newEntity);
+        $this->unitOfWork->registerDirty($dirtyEntity);
+        $this->unitOfWork->registerRemoved($removedEntity);
+
+        $callOrder = [];
+
+        $persister->method('supports')->willReturn(true);
+        $persister->method('delete')->willReturnCallback(
+            function () use (&$callOrder): void {
+                $callOrder[] = 'delete';
+            },
+        );
+        $persister->method('insert')->willReturnCallback(
+            function () use (&$callOrder): void {
+                $callOrder[] = 'insert';
+            },
+        );
+        $persister->method('update')->willReturnCallback(
+            function () use (&$callOrder): void {
+                $callOrder[] = 'update';
+            },
+        );
+
+        $this->pdo->method('beginTransaction');
+        $this->pdo->method('commit');
+
+        $this->unitOfWork->commit();
+
+        self::assertSame(['delete', 'insert', 'update'], $callOrder);
+    }
+
+    public function testMarksAllEntitiesAsCleanAfterASuccessfulCommit(): void {
+        $newEntity = new TestEntity();
+        $dirtyEntity = new TestEntity();
+
+        $persister = $this->createMock(EntityPersisterInterface::class);
+        $persister->method('supports')->willReturn(true);
+        $persister->method('insert');
+        $persister->method('update');
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($newEntity);
+        $this->unitOfWork->registerDirty($dirtyEntity);
+
+        $this->pdo->method('beginTransaction');
+        $this->pdo->method('commit');
+
+        $this->unitOfWork->commit();
+
+        self::assertSame(EntityState::CLEAN, $this->unitOfWork->getEntityState($newEntity));
+        self::assertSame(EntityState::CLEAN, $this->unitOfWork->getEntityState($dirtyEntity));
+    }
+
+    public function testClearsCollectionsAfterASuccessfulCommit(): void {
+        $entity = new TestEntity();
+        $persister = $this->createMock(EntityPersisterInterface::class);
+
+        $persister->method('supports')->willReturn(true);
+        $persister->method('insert');
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($entity);
+
+        $this->pdo->method('beginTransaction');
+        $this->pdo->method('commit');
+
+        $this->unitOfWork->commit();
+
+        // Try to register the same entity again - should work if collections are cleared
+        $this->unitOfWork->registerNew($entity);
+        self::assertSame(EntityState::NEW, $this->unitOfWork->getEntityState($entity));
+    }
+
+    public function testRollsBackOnPDOException(): void {
+        $entity = new TestEntity();
+        $persister = $this->createMock(EntityPersisterInterface::class);
+
+        $persister->method('supports')->willReturn(true);
+        $persister->method('insert')->willThrowException(new PDOException('Database error'));
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($entity);
+
+        $this->pdo->expects(self::once())->method('beginTransaction');
+        $this->pdo->expects(self::once())->method('rollBack');
+        $this->pdo->expects(self::never())->method('commit');
+
+        $this->expectException(PDOException::class);
+
+        $this->unitOfWork->commit();
+    }
+
+    public function testCallsPdoRollbackWhenInTransaction(): void {
+        $entity = new TestEntity();
+        $persister = $this->createMock(EntityPersisterInterface::class);
+
+        $persister->method('supports')->willReturn(true);
+        $persister->method('insert')->willThrowException(new PDOException('Database error'));
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($entity);
+
+        $this->pdo->method('beginTransaction')->willReturn(true);
+        $this->pdo->expects(self::once())->method('rollBack');
+
+        try {
+            $this->unitOfWork->commit();
+        } catch (PDOException $e) {
+            // Expected exception
+        }
+
+        self::assertFalse($this->unitOfWork->isInTransaction());
+    }
+
+    public function testDoesNothingWhenNotInTransactionOnRollback(): void {
+        $this->pdo->expects(self::never())->method('rollBack');
+
+        $this->unitOfWork->rollback();
+    }
+
+    public function testCanClearInternalState(): void {
+        $newEntity = new TestEntity();
+        $dirtyEntity = new TestEntity();
+        $removedEntity = new TestEntity();
+
+        $this->unitOfWork->registerNew($newEntity);
+        $this->unitOfWork->registerDirty($dirtyEntity);
+        $this->unitOfWork->registerRemoved($removedEntity);
+
+        $this->unitOfWork->clear();
+
+        // After clear, registering the same entities should work
+        $this->unitOfWork->registerNew($newEntity);
+        $this->unitOfWork->registerDirty($dirtyEntity);
+        $this->unitOfWork->registerRemoved($removedEntity);
+
+        self::assertSame(EntityState::NEW, $this->unitOfWork->getEntityState($newEntity));
+        self::assertSame(EntityState::DIRTY, $this->unitOfWork->getEntityState($dirtyEntity));
+        self::assertSame(EntityState::REMOVED, $this->unitOfWork->getEntityState($removedEntity));
+    }
+
+    public function testCallsPersisterOnEntityPersistence(): void {
+        $entity = new TestEntity();
+        $persister = $this->createMock(EntityPersisterInterface::class);
+
+        $persister->expects(self::once())->method('supports')->with($entity)->willReturn(true);
+        $persister->expects(self::once())->method('insert')->with($entity, $this->pdo);
+
+        $this->unitOfWork->registerPersister($persister);
+        $this->unitOfWork->registerNew($entity);
+
+        $this->pdo->method('beginTransaction');
+        $this->pdo->method('commit');
+
+        $this->unitOfWork->commit();
+    }
+
+    public function testThrowsRuntimeExceptionWhenNoPersisterWasFound(): void {
+        $entity = new TestEntity();
+
+        $this->unitOfWork->registerNew($entity);
+
+        $this->pdo->method('beginTransaction');
+
+        $this->expectException(RuntimeException::class);
+        $this->expectExceptionMessage('No persister found for entity of type');
+
+        $this->unitOfWork->commit();
+    }
+
+    public function testCanHandleMultipleRegisteredPersisters(): void {
+        $entity1 = new TestEntity();
+        $entity2 = new AnotherTestEntity();
+
+        $persister1 = $this->createMock(EntityPersisterInterface::class);
+        $persister2 = $this->createMock(EntityPersisterInterface::class);
+
+        $persister1->method('supports')->willReturnCallback(fn($entity) => $entity instanceof TestEntity);
+        $persister2->method('supports')->willReturnCallback(fn($entity) => $entity instanceof AnotherTestEntity);
+
+        $persister1->expects(self::once())->method('insert')->with($entity1, $this->pdo);
+        $persister2->expects(self::once())->method('insert')->with($entity2, $this->pdo);
+
+        $this->unitOfWork->registerPersister($persister1);
+        $this->unitOfWork->registerPersister($persister2);
+        $this->unitOfWork->registerNew($entity1);
+        $this->unitOfWork->registerNew($entity2);
+
+        $this->pdo->method('beginTransaction');
+        $this->pdo->method('commit');
+
+        $this->unitOfWork->commit();
+    }
+}
+
+class TestEntity
+{
+    public function __construct(public string $id = 'test-id') {}
+}
+
+class AnotherTestEntity
+{
+    public function __construct(public string $id = 'another-test-id') {}
+}
--- a/tests/Unit/Core/DependencyInjection/InflectableContainerTest.php
+++ b/tests/Unit/Core/DependencyInjection/InflectableContainerTest.php
@ -0,0 +1,210 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Foundation\Tests\Unit\Core\DependencyInjection;
+
+use DI\Container;
+use Foundation\Core\DependencyInjection\AttributeProcessorInterface;
+use Foundation\Core\DependencyInjection\InflectableContainer;
+use PHPUnit\Framework\TestCase;
+
+class InflectableContainerTest extends TestCase
+{
+    private Container $phpDiContainer;
+    private InflectableContainer $container;
+
+    protected function setUp(): void {
+        $this->phpDiContainer = new Container();
+        $this->container = new InflectableContainer($this->phpDiContainer);
+    }
+
+    public function testCanGetAndSetServices(): void {
+        $this->container->set('test.value', 'hello world');
+
+        self::assertTrue($this->container->has('test.value'));
+        self::assertSame('hello world', $this->container->get('test.value'));
+    }
+
+    public function testCanMakeInstancesWithParameters(): void {
+        $instance = $this->container->make(TestClass::class, ['value' => 'test']);
+
+        self::assertInstanceOf(TestClass::class, $instance);
+        self::assertSame('test', $instance->getValue());
+    }
+
+    public function testCanRegisterClassWithoutDependencies(): void {
+        $instance = $this->container->register(TestClass::class);
+
+        self::assertInstanceOf(TestClass::class, $instance);
+        self::assertTrue($this->container->has(TestClass::class));
+    }
+
+    public function testCanRegisterClassWithDependencies(): void {
+        $this->container->set('dependency', new TestDependency('injected'));
+
+        $instance = $this->container->register(TestClassWithDependency::class, ['dependency']);
+
+        self::assertInstanceOf(TestClassWithDependency::class, $instance);
+        self::assertSame('injected', $instance->getDependencyValue());
+    }
+
+    public function testCanBindInterfaceToImplementation(): void {
+        $instance = $this->container->bind(TestInterface::class, TestImplementation::class);
+
+        self::assertInstanceOf(TestImplementation::class, $instance);
+        self::assertTrue($this->container->has(TestInterface::class));
+
+        $retrieved = $this->container->get(TestInterface::class);
+        self::assertInstanceOf(TestImplementation::class, $retrieved);
+    }
+
+    public function testCanBindInterfaceToImplementationWithDependencies(): void {
+        $this->container->set('dependency', new TestDependency('bound'));
+
+        $instance = $this->container->bind(
+            TestInterface::class,
+            TestImplementationWithDependency::class,
+            ['dependency'],
+        );
+
+        self::assertInstanceOf(TestImplementationWithDependency::class, $instance);
+        self::assertSame('bound', $instance->getDependencyValue());
+    }
+
+    public function testInflectionSystemAppliesDirectClassInflections(): void {
+        $this->container->registerInflection(
+            TestInflectionTarget::class,
+            'setInjectedValue',
+            ['injected_value'],
+        );
+
+        $instance = $this->container->make(TestInflectionTarget::class);
+
+        self::assertSame('injected_value', $instance->getInjectedValue());
+    }
+
+    public function testInflectionSystemAppliesInterfaceInflections(): void {
+        $this->container->registerInflection(
+            TestInflectionInterface::class,
+            'setInjectedValue',
+            ['interface_value'],
+        );
+
+        $instance = $this->container->make(TestInflectionImplementation::class);
+
+        self::assertSame('interface_value', $instance->getInjectedValue());
+    }
+
+    public function testInflectionSystemResolvesParametersFromContainer(): void {
+        $dependency = new TestDependency('resolved');
+        $this->container->set(TestDependency::class, $dependency);
+
+        $this->container->registerInflection(
+            TestInflectionTarget::class,
+            'setDependency',
+            [TestDependency::class],
+        );
+
+        $instance = $this->container->make(TestInflectionTarget::class);
+
+        self::assertSame($dependency, $instance->getDependency());
+    }
+
+    public function testAttributeProcessorsAreCalledDuringRegistration(): void {
+        $processor = $this->createMock(AttributeProcessorInterface::class);
+        $processor->expects(self::once())->method('canProcess')->with(TestClass::class)->willReturn(true);
+        $processor->expects(self::once())->method('process')->with(TestClass::class);
+
+        $this->container->addAttributeProcessor($processor);
+        $this->container->register(TestClass::class);
+    }
+
+    public function testReturnsNonObjectsDirectly(): void {
+        $this->container->set('array.value', ['test' => 'array']);
+        $this->container->set('string.value', 'test string');
+
+        self::assertSame(['test' => 'array'], $this->container->get('array.value'));
+        self::assertSame('test string', $this->container->get('string.value'));
+    }
+}
+
+class TestClass
+{
+    public function __construct(private readonly string $value = 'default') {}
+
+    public function getValue(): string {
+        return $this->value;
+    }
+}
+
+class TestDependency
+{
+    public function __construct(private readonly string $value) {}
+
+    public function getValue(): string {
+        return $this->value;
+    }
+}
+
+class TestClassWithDependency
+{
+    public function __construct(private readonly TestDependency $dependency) {}
+
+    public function getDependencyValue(): string {
+        return $this->dependency->getValue();
+    }
+}
+
+interface TestInterface { }
+
+class TestImplementation implements TestInterface { }
+
+class TestImplementationWithDependency implements TestInterface
+{
+    public function __construct(private readonly TestDependency $dependency) {}
+
+    public function getDependencyValue(): string {
+        return $this->dependency->getValue();
+    }
+}
+
+interface TestInflectionInterface
+{
+    public function setInjectedValue(string $value): void;
+}
+
+class TestInflectionTarget
+{
+    private ?string $injectedValue = null;
+    private ?TestDependency $dependency = null;
+
+    public function setInjectedValue(string $value): void {
+        $this->injectedValue = $value;
+    }
+
+    public function getInjectedValue(): ?string {
+        return $this->injectedValue;
+    }
+
+    public function setDependency(TestDependency $dependency): void {
+        $this->dependency = $dependency;
+    }
+
+    public function getDependency(): ?TestDependency {
+        return $this->dependency;
+    }
+}
+
+class TestInflectionImplementation implements TestInflectionInterface
+{
+    private ?string $injectedValue = null;
+
+    public function setInjectedValue(string $value): void {
+        $this->injectedValue = $value;
+    }
+
+    public function getInjectedValue(): ?string {
+        return $this->injectedValue;
+    }
+}