Add .claude automation config and skills

Introduce Claude Code automation for the PetSphere repo under .claude. Adds a README, settings.json (hooks, protected paths, and MCP servers), a code-reviewer agent, and three user-invocable skills: flutter-new-component, migration-helper, and test-writer. These provide scaffolding for Flutter components, feature layer generation, and test generation, plus automatic format/lint hooks and repository-specific protections to streamline development and reviews.

Author: syed-reza98

.claude/README.md

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+# Claude Code Configuration for PetSphere
+
+This directory contains tailored automation, skills, and settings for PetSphere Flutter development.
+
+## 📋 Contents
+
+### Configuration
+- **`settings.json`** — Project-wide settings including hooks, permissions, and MCP server configuration
+
+### Skills (User-Invocable)
+
+#### 1. `/flutter-new-component`
+Scaffold new reusable Flutter components following PetSphere patterns.
+
+```bash
+/flutter-new-component PetCard "Displays a pet profile card"
+/flutter-new-component HealthMetricGraph "Shows health trend chart" --stateful
+/flutter-new-component CareBadgeList "Lists earned care badges" --consumer
+```
+
+**Output**: Creates `lib/views/components/{component_name}.dart` with proper typing, theming, and patterns.
+
+---
+
+#### 2. `/test-writer`
+Generate unit tests for Notifiers, repositories, and utilities following arrange-act-assert pattern.
+
+```bash
+/test-writer lib/controllers/pet_controller.dart
+/test-writer lib/repositories/health_repository.dart --coverage
+```
+
+**Output**: Creates test files in `test/` mirroring `lib/` structure with mocks and test cases.
+
+---
+
+#### 3. `/migration-helper`
+Scaffold complete feature layers (model + repository + controller) in one command.
+
+```bash
+/migration-helper PetNutrition "Track pet nutrition and dietary info" --table-name=pet_nutrition
+/migration-helper ActivityLog "Log pet daily activities" --table-name=activity_logs
+```
+
+**Output**: 
+- `lib/models/{feature_name}_model.dart`
+- `lib/repositories/{feature_name}_repository.dart`
+- `lib/controllers/{feature_name}_controller.dart`
+
+All three files follow PetSphere architecture patterns and are production-ready.
+
+---
+
+### Agents (Specialized Reviewers)
+
+#### Code Reviewer (`@code-reviewer`)
+Comprehensive code review agent focused on Riverpod patterns, architecture compliance, and Dart best practices.
+
+```bash
+# Review current branch
+claude @code-reviewer "Review this branch for Riverpod patterns and null safety"
+
+# Review specific files
+claude @code-reviewer "Review lib/controllers/ for state management"
+
+# Pre-PR review
+claude @code-reviewer "Code review before merge"
+```
+
+**Checks**:
+- Architecture layer compliance
+- Riverpod patterns (Notifier, State, providers)
+- Null safety and type safety
+- Model immutability
+- Repository pattern compliance
+- Code quality and style
+- Error handling
+- Testing readiness
+
+---
+
+## ⚡ Hooks (Automatic)
+
+The following hooks run automatically on file edits:
+
+### Auto-Format & Lint
+Runs `dart format` and `flutter analyze` after each edit.
+- Keeps code style consistent
+- Catches linting issues early
+- Runs automatically, no user action needed
+
+### Protected Files
+Prevents accidental edits to sensitive files:
+- `pubspec.lock` (version lock file)
+- `.env*` (secrets and config)
+- `lib/utils/supabase_config.dart` (credentials)
+- `android/local.properties`, `ios/local.properties`
+
+---
+
+## 🔌 MCP Servers (Recommended)
+
+Two MCP servers are configured in `settings.json` for enhanced capabilities:
+
+### 1. **Supabase MCP**
+Direct access to your PostgreSQL database.
+
+**Usage**:
+- Inspect table schemas
+- Debug RLS policies
+- Test SQL queries
+- Monitor migration status
+
+---
+
+### 2. **context7 MCP**
+Real-time documentation lookup for Flutter/Dart/Riverpod.
+
+**Usage**:
+- Look up Flutter API docs while coding
+- Check Riverpod pattern documentation
+- Search Dart language features
+- Find Material Design guidelines
+
+---
+
+## 🚀 Quick Start
+
+### 1. Enable Hooks
+Hooks are configured in `settings.json` and should activate automatically. Test with:
+```bash
+# Edit any Dart file and verify `dart format` runs
+echo "void main(){}" > lib/test.dart
+# Should be auto-formatted to proper style
+```
+
+### 2. Try a Skill
+Generate your first component:
+```bash
+/flutter-new-component TestCard "A test component"
+```
+
+Look for the created file in `lib/views/components/test_card.dart`.
+
+### 3. Run a Full Feature Migration
+Create a complete feature layer:
+```bash
+/migration-helper TestFeature "A test feature" --table-name=test_features
+```
+
+Check created files:
+- `lib/models/test_feature_model.dart`
+- `lib/repositories/test_feature_repository.dart`
+- `lib/controllers/test_feature_controller.dart`
+
+### 4. Code Review Before Merge
+Before pushing to GitHub:
+```bash
+claude @code-reviewer "Review my feature branch for architecture compliance"
+```
+
+---
+
+## 📚 Recommended Workflow
+
+### When Adding a New Feature
+
+1. **Scaffold with `/migration-helper`**
+   ```bash
+   /migration-helper PetNutrition "Track nutrition" --table-name=pet_nutrition
+   ```
+
+2. **Generate Tests with `/test-writer`**
+   ```bash
+   /test-writer lib/controllers/pet_nutrition_controller.dart
+   ```
+
+3. **Create UI Components with `/flutter-new-component`**
+   ```bash
+   /flutter-new-component NutritionCard "Shows nutrition info"
+   /flutter-new-component NutritionForm "Edit nutrition record" --stateful
+   ```
+
+4. **Review Before Merge**
+   ```bash
+   claude @code-reviewer "Code review for nutrition feature"
+   ```
+
+5. **Hooks run automatically** — no manual linting needed
+
+---
+
+## 🔧 Customizing
+
+### Add More Hooks
+Edit `settings.json` hooks section to add auto-format for other languages or add validation checks.
+
+Example: Auto-run tests on Dart file edits:
+```json
+{
+  "trigger": "PostToolUse",
+  "tool": "Edit",
+  "command": "flutter test --help"
+}
+```
+
+### Modify Protected Files
+Edit the `preToolUse` section to add/remove protected paths.
+
+---
+
+## 📖 File Organization
+
+```
+.claude/
+├── settings.json                              # Project-wide config
+├── README.md                                  # This file
+├── skills/
+│   ├── flutter-new-component/SKILL.md
+│   ├── test-writer/SKILL.md
+│   └── migration-helper/SKILL.md
+└── agents/
+    └── code-reviewer.md
+```
+
+---
+
+## 🆘 Troubleshooting
+
+### Hooks Not Running
+- Verify `settings.json` is valid JSON (no trailing commas)
+- Check file paths are correct relative to project root
+- Reload Claude Code: File → Reload
+
+### Skills Not Appearing
+- Ensure `SKILL.md` files are in `.claude/skills/{name}/SKILL.md`
+- Reload Claude Code
+- Check skill name in frontmatter matches directory name
+
+### Code Review Agent Issues
+- Ensure sufficient tokens available (large reviews may timeout)
+- Split very large PRs into multiple reviews
+- Check git repo is initialized (agent needs git context)
+
+---
+
+## 📝 Notes
+
+- Skills can be customized further by editing their `.md` files
+- All generated code is production-ready; update with your custom logic
+- Tests generated have TODO comments for custom assertions
+- Settings are project-specific; team members should use same `.claude/` directory
+
+---
+
+**Last Updated**: 2026-05-05  
+**Version**: 1.0  
+**Maintained by**: Claude Code Automation System

.claude/agents/code-reviewer.md

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+# Code Reviewer Agent for PetSphere
+
+Specialized code review agent for PetSphere Flutter codebase, focusing on Riverpod patterns, architecture compliance, and Dart best practices.
+
+## Trigger
+
+Invoke this agent when you need a comprehensive code review before merging:
+
+```bash
+# Review current branch for architecture compliance
+claude @code-reviewer "Review this branch for Riverpod patterns and null safety"
+
+# Review specific files
+claude @code-reviewer "Review lib/controllers/pet_controller.dart for state management"
+
+# Review PR diff
+claude @code-reviewer "Code review: ensure immutability and error handling in lib/repositories/"
+```
+
+## Review Checklist
+
+The agent verifies:
+
+### Architecture & Patterns ✅
+- [ ] Feature uses the correct layer (model → repo → controller → view)
+- [ ] Notifier extends `Notifier<State>`, not `StateNotifier`
+- [ ] State is immutable with `copyWith()` implementation
+- [ ] All data access flows through repositories
+- [ ] Controllers don't bypass repositories
+- [ ] Views use `ConsumerWidget` or `ConsumerStatefulWidget` where needed
+
+### Riverpod & State Management ✅
+- [ ] Providers are declared at file end
+- [ ] `NotifierProvider` used for mutable state
+- [ ] `StateProvider` used for simple scalars
+- [ ] `FutureProvider` used only for single-value async (not long-running)
+- [ ] `ref.watch()` for UI state subscription
+- [ ] `ref.read()` for triggering actions
+- [ ] Proper error handling in notifier methods
+- [ ] Loading states set before/after async operations
+
+### Null Safety & Type Safety ✅
+- [ ] No `!` operator without justified non-null guarantees
+- [ ] Use `?.` for safe optional access
+- [ ] Optional parameters use `?` type annotations
+- [ ] `late` used sparingly with clear initialization
+- [ ] All types are explicit (no untyped `var` or `dynamic`)
+
+### Model & Data Integrity ✅
+- [ ] Models are immutable (all fields `final`)
+- [ ] `fromJson()` parses snake_case from Supabase correctly
+- [ ] `toJson()` converts back to snake_case for Supabase
+- [ ] `copyWith()` creates new instances (not mutating)
+- [ ] Enum handling is type-safe
+
+### Repository Pattern ✅
+- [ ] Async operations return typed futures (not `dynamic`)
+- [ ] Error handling: exceptions propagate (not swallowed)
+- [ ] Supabase queries use `.select()` with explicit columns
+- [ ] RLS policies are considered in query design
+- [ ] Image uploads specify bucket path correctly
+
+### Code Quality ✅
+- [ ] Methods under 20 lines (extract complex logic)
+- [ ] No magic numbers (use named constants)
+- [ ] Imports organized: dart, package, relative
+- [ ] Snake_case for files, PascalCase for classes, camelCase for variables
+- [ ] No `print()` (use `developer.log()` instead)
+- [ ] Comments explain "why" not "what"
+- [ ] No TODO comments in production code (document issues in Linear/GitHub)
+
+### Error Handling ✅
+- [ ] Try-catch at repository/controller layers
+- [ ] Errors propagate to UI (state.error field)
+- [ ] User-friendly error messages (no stack traces in UI)
+- [ ] Network errors distinguished from validation errors
+
+### Testing Readiness ✅
+- [ ] Methods are testable (dependencies injectable or via Riverpod)
+- [ ] State classes have test-friendly constructors
+- [ ] No hardcoded dependencies or singletons (except repositories)
+- [ ] No untestable async code in build methods
+
+## Output
+
+The agent provides:
+
+1. **Pass/Fail Summary** — Architecture compliance status
+2. **Issues Found** — Specific violations with line numbers
+3. **Suggestions** — Refactoring recommendations
+4. **Examples** — Corrected code snippets for violations
+5. **Approval** — Merged/approved status with caveats
+
+## Integration with CI/CD
+
+For automated pre-merge reviews, use in GitHub Actions:
+
+```yaml
+# .github/workflows/code-review.yml
+name: PetSphere Code Review
+
+on: [pull_request]
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Claude Code Review
+        run: |
+          claude @code-reviewer "Review PR changes for architecture and patterns"
+```
+
+## Known Issues & Edge Cases
+
+- **Large PRs**: Reviews top 20 files; request split reviews for >50 files
+- **Generated Code**: Skips code generation artifacts (normally)
+- **External Packages**: Doesn't review vendored code
+- **Monorepos**: Specify path for review scope
+
+## Tips
+
+- Run before opening a PR for faster feedback
+- Use for onboarding new team members (learn patterns)
+- Run monthly on main to catch drift
+- Pair with `/test-writer` skill for comprehensive coverage