Add project infrastructure files

public/layouts/404.twig

@@ -0,0 +1,6 @@
+{% extends "layouts/base.twig" %}
+
+{% block content %}
+    <h1>Page Not Found</h1>
+    <p>The page you're looking for doesn't exist.</p>
+{% endblock %}

public/layouts/assets/style.css

@@ -0,0 +1,63 @@
+body{
+	font-size:16px;
+}
+.docs-layout {
+	display: grid;
+	grid-template-columns: 300px 1fr;
+	gap: 5rem;
+	max-width: 1200px;
+	margin: 0 auto;
+	padding: 1rem;
+}
+
+.mod--center{
+	text-align:center;
+	margin: auto;
+	display: block;
+}
+
+header{
+	max-width:1200px;
+	margin:auto;
+}
+
+header nav{
+	display:flex;
+	justify-content: right;
+}
+
+.docs-content {
+	max-width: 800px;
+}
+
+.docs-sidebar {
+	position: sticky;
+	top: 1rem;
+	height: calc(100vh - 2rem);
+	overflow-y: auto;
+	padding-right: 1rem;
+}
+
+details[open] > summary, details{
+	margin-bottom:initial;
+}
+
+.nav-group {
+	border-left: 1px solid var(--pico-accordion-open-summary-color);
+	margin: 0.5rem 0 0.5rem 0.5rem;
+	padding-left: 0.5rem;
+}
+
+.nav-section > summary {
+	cursor: pointer;
+	padding: 0.25rem 0;
+	list-style: none;
+}
+
+.nav-item {
+	padding: 0.25rem 0;
+}
+
+.nav-item--active {
+	font-weight: bold;
+}

public/layouts/checklists/_template.md

@@ -0,0 +1,134 @@
+# Documentation Checklist: [PACKAGE_NAME]
+
+Package: `phpnomad/[package]`
+Status: Not Started | In Progress | Needs Review | Complete
+Last Updated: YYYY-MM-DD
+
+---
+
+## Phase 1: Research
+
+### Package Components
+(List all interfaces, traits, classes, and exceptions found in the source code)
+
+**Interfaces:**
+- [ ] `InterfaceName` - Brief description
+
+**Traits:**
+- [ ] `TraitName` - Brief description
+
+**Classes:**
+- [ ] `ClassName` - Brief description
+
+**Exceptions:**
+- [ ] `ExceptionName` - Brief description
+
+### Dependencies
+- Depends on: (list packages this requires)
+- Depended on by: (list packages that require this)
+
+### Existing References
+(List existing docs that mention this package - these need cross-reference updates)
+- [ ] `path/to/doc.md` - Context of mention
+
+---
+
+## Phase 2: Planned Structure
+
+(Define all files to create before writing any content)
+
+```
+docs/packages/[package]/
+├── introduction.md
+├── [subdirectory]/
+│   ├── introduction.md
+│   └── [component].md
+└── [concept].md
+```
+
+### Files to Create
+- [ ] `introduction.md` - Package overview
+- [ ] (add all planned files here)
+
+---
+
+## Phase 3: Writing Checklist
+
+### Structure
+- [ ] Has `introduction.md` as main entry point
+- [ ] Has subdirectories for major concepts (if applicable)
+- [ ] Each interface/trait/class has dedicated documentation file
+
+### Frontmatter (Required for ALL .md files)
+- [ ] Has `id` field
+- [ ] Has `slug` field
+- [ ] Has `title` field
+- [ ] Has `doc_type` (explanation, tutorial, reference, how-to)
+- [ ] Has `summary` (1-2 sentence description)
+- [ ] Has `llm_summary` (detailed description for AI consumption)
+- [ ] Has `questions_answered` list
+- [ ] Has `audience` list
+- [ ] Has `tags` and `llm_tags`
+- [ ] Has `keywords`
+- [ ] Has `related` links
+- [ ] Has `see_also` links
+
+### Content - Introduction File
+- [ ] Explains what the package does
+- [ ] Explains why it exists / what problem it solves
+- [ ] Has "Key ideas at a glance" summary
+- [ ] Has installation instructions
+- [ ] Has visual diagram (ASCII) showing data/control flow (if applicable)
+- [ ] Lists core components with brief descriptions and links to detail pages
+- [ ] Has "When to use this package" section
+- [ ] Has "Relationship to other packages" section
+- [ ] Has "Next steps" with links to deeper docs
+
+### Content - Component Files
+- [ ] Each interface has its own documentation file
+- [ ] Each trait has its own documentation file
+- [ ] Each significant class has its own documentation file
+- [ ] Method signatures with parameter descriptions
+- [ ] Return types explained
+- [ ] Exceptions documented
+- [ ] Usage examples per component
+
+### Content - Conceptual
+- [ ] Explains the patterns/architecture used
+- [ ] Explains the lifecycle of operations (if applicable)
+- [ ] Has "Why use this" section with benefits
+- [ ] Has "Best practices" section
+- [ ] Has "When NOT to use" guidance (if applicable)
+
+### Content - Examples
+- [ ] Has basic usage example
+- [ ] Has real-world/practical example
+- [ ] Has integration example with other packages
+- [ ] Code examples are complete and runnable
+- [ ] Examples show common patterns
+
+---
+
+## Phase 4: Review
+
+### Cross-References
+- [ ] Links to packages this depends on
+- [ ] Links to packages that depend on this
+- [ ] Links to related concepts in core-concepts/
+- [ ] Internal links between doc files work
+- [ ] **Updated existing docs with links back to this package**
+
+### Quality
+- [ ] No placeholder text
+- [ ] Consistent formatting with other package docs
+- [ ] Spell-checked
+- [ ] Code examples tested/verified
+
+### Final Approval
+- [ ] **Approved by human** - Documentation reviewed and approved by a human
+
+---
+
+## Notes
+
+(Add any package-specific notes, questions, or issues here)

public/layouts/checklists/config.md

@@ -0,0 +1,151 @@
+# Documentation Checklist: Config
+
+Package: `phpnomad/config`
+Status: Needs Review
+Last Updated: 2026-01-25
+
+---
+
+## Phase 1: Research
+
+### Package Components
+
+**Interfaces:**
+- [x] `ConfigStrategy` - Main interface for configuration access
+- [x] `ConfigFileLoaderStrategy` - Interface for loading configuration from files
+
+**Traits:**
+- (none)
+
+**Classes:**
+- [x] `ConfigService` - Default implementation of ConfigStrategy
+
+**Exceptions:**
+- [x] `ConfigException` - Exception for configuration errors
+
+### Dependencies
+- Depends on: Nothing (zero dependencies)
+- Depended on by: json-config-integration, wordpress-plugin
+
+### Existing References
+- **ISOLATED** - No other documented packages currently reference the config package
+- This package needs backlinks added when dependent packages are documented
+
+---
+
+## Phase 2: Planned Structure
+
+```
+docs/packages/config/
+├── introduction.md           # Package overview
+├── interfaces/
+│   ├── introduction.md       # Interfaces overview
+│   ├── config-strategy.md    # ConfigStrategy interface
+│   └── config-file-loader-strategy.md  # ConfigFileLoaderStrategy interface
+├── services/
+│   ├── introduction.md       # Services overview
+│   └── config-service.md     # ConfigService class
+└── exceptions/
+    └── config-exception.md   # ConfigException
+```
+
+### Files to Create
+- [x] `introduction.md` - Package overview (links to component pages)
+- [x] `interfaces/introduction.md` - Interfaces overview
+- [x] `interfaces/config-strategy.md` - ConfigStrategy interface detail
+- [x] `interfaces/config-file-loader-strategy.md` - ConfigFileLoaderStrategy interface detail
+- [x] `services/introduction.md` - Services overview
+- [x] `services/config-service.md` - ConfigService class detail
+- [x] `exceptions/config-exception.md` - ConfigException detail
+
+**Restructured:** 2026-01-25 - Split into 7 files following file-per-interface rule.
+
+---
+
+## Phase 3: Writing Checklist
+
+### Structure
+- [x] Has `introduction.md` as main entry point
+- [x] Has subdirectories for major concepts (if applicable)
+- [x] Each interface/trait/class has dedicated documentation file
+
+### Frontmatter (Required for ALL .md files)
+- [x] Has `id` field
+- [x] Has `slug` field
+- [x] Has `title` field
+- [x] Has `doc_type` (explanation, tutorial, reference, how-to)
+- [x] Has `summary` (1-2 sentence description)
+- [x] Has `llm_summary` (detailed description for AI consumption)
+- [x] Has `questions_answered` list
+- [x] Has `audience` list
+- [x] Has `tags` and `llm_tags`
+- [x] Has `keywords`
+- [x] Has `related` links
+- [x] Has `see_also` links
+
+### Content - Introduction File
+- [x] Explains what the package does
+- [x] Explains why it exists / what problem it solves
+- [x] Has "Key ideas at a glance" summary
+- [x] Has installation instructions
+- [x] Has visual diagram (ASCII) showing data/control flow (if applicable)
+- [x] Lists core components with brief descriptions and links to detail pages
+- [x] Has "When to use this package" section
+- [x] Has "Relationship to other packages" section
+- [x] Has "Next steps" with links to deeper docs
+
+### Content - Component Files
+- [x] Each interface has its own documentation file
+- [x] Each trait has its own documentation file - N/A, no traits
+- [x] Each significant class has its own documentation file
+- [x] Method signatures with parameter descriptions
+- [x] Return types explained
+- [x] Exceptions documented
+
+### Content - Conceptual
+- [x] Explains the patterns/architecture used
+- [x] Explains the lifecycle of operations (if applicable)
+- [x] Has "Why use this" section with benefits
+- [x] Has "Best practices" section
+- [x] Has "When NOT to use" guidance (if applicable)
+
+### Content - Examples
+- [x] Has basic usage example
+- [x] Has real-world/practical example
+- [x] Has integration example with other packages
+- [x] Code examples are complete and runnable
+- [x] Examples show common patterns
+
+---
+
+## Phase 4: Review
+
+### Cross-References
+- [x] Links to packages this depends on - N/A, no dependencies
+- [x] Links to packages that depend on this
+- [x] Links to related concepts in core-concepts/
+- [x] Internal links between doc files work - Single file currently
+- [ ] **Updated existing docs with links back to this package** - No docs reference config yet
+
+### Quality
+- [x] No placeholder text
+- [x] Consistent formatting with other package docs
+- [x] Spell-checked
+- [ ] Code examples tested/verified
+
+### Final Approval
+- [ ] **Approved by human** - Documentation reviewed and approved by a human
+
+---
+
+## Notes
+
+- Package has 2 interfaces, 1 service class, 1 exception - currently all in introduction
+- Comprehensive flow diagram showing loader -> service -> strategy workflow
+- Includes multi-environment application example
+- Testing section demonstrates mocking configuration
+- Dependent packages: json-config-integration, wordpress-plugin
+- **RESTRUCTURED**: Split into 7 files on 2026-01-25
+- **ISOLATED**: No backlinks exist because no documented packages use config yet
+- Remaining items:
+  1. Verify code examples work (manual testing)