Add service component: preferences-api

.woodpecker.yml

@@ -35,6 +35,34 @@ steps:
       event: push
 
   # COMPONENT_STEPS_BELOW
+
+  # Woodpecker CI step for preferences-api service
+  # Add this step to your .woodpecker.yml
+  
+  build-preferences-api:
+    depends_on: [deps]
+    image: woodpeckerci/plugin-kaniko
+    settings:
+      registry: registry.threesix.ai
+      repo: slate-complete-1770512537/preferences-api
+      tags:
+        - latest
+        - ${CI_COMMIT_SHA:0:8}
+      context: .
+      dockerfile: services/preferences-api/Dockerfile
+      cache: true
+      skip-tls-verify: true
+    when:
+      branch: main
+      event: push
+  
+  deploy-preferences-api:
+    image: bitnami/kubectl:latest
+    commands:
+      - kubectl set image deployment/slate-complete-1770512537-preferences-api preferences-api=registry.threesix.ai/slate-complete-1770512537/preferences-api:${CI_COMMIT_SHA:0:8} -n projects || echo "Deployment not found, skipping"
+    when:
+      branch: main
+      event: push
   # Do not remove the marker above - component steps are inserted here
 
   # Sync point after all component builds complete

CLAUDE.md

@@ -76,4 +76,7 @@ slate-complete-1770512537/
 
 ## Components
 
-<!-- Components will be listed here as they're added -->
+| Component | Type | Path |
+|-----------|------|------|
+| **preferences-api** | API service | `services/preferences-api/` |
+

Procfile

@@ -1,2 +1,3 @@
 # Local development processes
 # Components will be added below as they're created
+preferences-api: cd services/preferences-api && make run

go.work

@@ -1,4 +1,5 @@
 go 1.23
 
 use ./pkg
+use ./services/preferences-api
 // Component modules will be added below

services/preferences-api/.env.example

@@ -0,0 +1,21 @@
+# preferences-api Service Configuration
+
+# Server
+SERVER_PORT=8001
+SERVER_HOST=0.0.0.0
+
+# App
+APP_NAME=preferences-api
+APP_ENVIRONMENT=development
+APP_DEBUG=true
+
+# Logging
+LOG_LEVEL=debug
+LOG_FORMAT=text
+
+# Auth (set AUTH_ENABLED=true to require JWT for protected routes)
+AUTH_ENABLED=false
+JWT_SECRET=dev-secret-change-in-production
+
+# Database (if needed)
+DATABASE_URL=postgres://dev:dev@localhost:5432/slate-complete-1770512537?sslmode=disable

services/preferences-api/Dockerfile

@@ -0,0 +1,35 @@
+# Build stage
+FROM golang:1.23-alpine AS builder
+
+RUN apk add --no-cache git
+
+# Configure Go private modules
+# Disable workspace mode - each component builds independently with replace directives
+ENV GOPRIVATE=git.threesix.ai/*
+ENV GOWORK=off
+
+WORKDIR /app
+
+# Copy shared pkg and this service only
+COPY pkg/ ./pkg/
+COPY services/preferences-api/ ./services/preferences-api/
+
+# Download dependencies (populates go.sum if empty)
+RUN cd pkg && go mod download
+RUN cd services/preferences-api && go mod download
+
+# Build from the service directory (uses replace directive for ../pkg)
+RUN cd services/preferences-api && CGO_ENABLED=0 go build -o /preferences-api ./cmd/server
+
+# Production stage
+FROM alpine:3.19
+
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /
+
+COPY --from=builder /preferences-api /preferences-api
+
+EXPOSE 8001
+
+ENTRYPOINT ["/preferences-api"]

services/preferences-api/Makefile

@@ -0,0 +1,34 @@
+.PHONY: build run test lint fmt docker-build clean
+
+SERVICE := preferences-api
+BINARY := bin/$(SERVICE)
+GO_MODULE := git.threesix.ai/jordan/slate-complete-1770512537
+
+# Build the service binary
+build:
+	go build -o $(BINARY) ./cmd/server
+
+# Run the service locally
+run:
+	go run ./cmd/server
+
+# Run tests
+test:
+	go test -v ./...
+
+# Run linter
+lint:
+	golangci-lint run ./...
+
+# Format code
+fmt:
+	gofmt -w .
+	goimports -w -local $(GO_MODULE) .
+
+# Build Docker image (run from monorepo root)
+docker-build:
+	docker build -t $(SERVICE):latest -f Dockerfile ../..
+
+# Clean build artifacts
+clean:
+	rm -rf bin/

services/preferences-api/cmd/server/main.go

@@ -0,0 +1,50 @@
+// Package main is the entry point for the preferences-api service.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/app"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/adapter/memory"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/api"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/service"
+)
+
+func main() {
+	// Parse flags
+	exportOpenAPI := flag.Bool("export-openapi", false, "Export OpenAPI spec to stdout and exit")
+	flag.Parse()
+
+	// If exporting OpenAPI, generate spec and exit (used by CI for docs generation)
+	if *exportOpenAPI {
+		spec := api.NewServiceSpec()
+		jsonBytes, err := spec.JSON()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to generate OpenAPI spec: %v\n", err)
+			os.Exit(1)
+		}
+		fmt.Println(string(jsonBytes))
+		os.Exit(0)
+	}
+
+	// Create logger
+	logger := logging.Default()
+
+	// Create adapters (repositories)
+	exampleRepo := memory.NewExampleRepository()
+
+	// Create services (business logic)
+	exampleService := service.NewExampleService(exampleRepo, logger)
+
+	// Create application
+	application := app.New("preferences-api", app.WithDefaultPort(8001))
+
+	// Register routes with dependency injection
+	api.RegisterRoutes(application, exampleService)
+
+	// Start server
+	application.Run()
+}

services/preferences-api/component.yaml

@@ -0,0 +1,9 @@
+name: preferences-api
+type: service
+port: 8001
+path: services/preferences-api
+dependencies: []
+# Add dependencies as needed:
+#   - postgres
+#   - redis
+#   - other-service

services/preferences-api/go.mod

@@ -0,0 +1,8 @@
+module git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api
+
+go 1.23
+
+require git.threesix.ai/jordan/slate-complete-1770512537/pkg v0.0.0
+
+// Use local workspace modules (for Docker builds without go.work)
+replace git.threesix.ai/jordan/slate-complete-1770512537/pkg => ../../pkg

services/preferences-api/internal/adapter/memory/example.go

@@ -0,0 +1,106 @@
+// Package memory provides in-memory implementations of repository interfaces.
+// Useful for development, testing, and prototyping.
+package memory
+
+import (
+	"context"
+	"sync"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/port"
+)
+
+// Compile-time verification that ExampleRepository implements port.ExampleRepository.
+var _ port.ExampleRepository = (*ExampleRepository)(nil)
+
+// ExampleRepository is a thread-safe in-memory implementation of port.ExampleRepository.
+type ExampleRepository struct {
+	mu       sync.RWMutex
+	examples map[domain.ExampleID]*domain.Example
+}
+
+// NewExampleRepository creates a new in-memory example repository.
+func NewExampleRepository() *ExampleRepository {
+	return &ExampleRepository{
+		examples: make(map[domain.ExampleID]*domain.Example),
+	}
+}
+
+// List returns all examples.
+func (r *ExampleRepository) List(ctx context.Context) ([]domain.Example, error) {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	result := make([]domain.Example, 0, len(r.examples))
+	for _, e := range r.examples {
+		result = append(result, *e)
+	}
+	return result, nil
+}
+
+// Get returns an example by ID.
+// Returns domain.ErrExampleNotFound if not found.
+func (r *ExampleRepository) Get(ctx context.Context, id domain.ExampleID) (*domain.Example, error) {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	e, ok := r.examples[id]
+	if !ok {
+		return nil, domain.ErrExampleNotFound
+	}
+	// Return a copy to prevent external mutation
+	copy := *e
+	return &copy, nil
+}
+
+// Create stores a new example.
+func (r *ExampleRepository) Create(ctx context.Context, example *domain.Example) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	// Store a copy to prevent external mutation
+	copy := *example
+	r.examples[example.ID] = &copy
+	return nil
+}
+
+// Update modifies an existing example.
+// Returns domain.ErrExampleNotFound if not found.
+func (r *ExampleRepository) Update(ctx context.Context, example *domain.Example) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	if _, ok := r.examples[example.ID]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	// Store a copy to prevent external mutation
+	copy := *example
+	r.examples[example.ID] = &copy
+	return nil
+}
+
+// Delete removes an example by ID.
+// Returns domain.ErrExampleNotFound if not found.
+func (r *ExampleRepository) Delete(ctx context.Context, id domain.ExampleID) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	if _, ok := r.examples[id]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	delete(r.examples, id)
+	return nil
+}
+
+// ExistsByName checks if an example with the given name exists.
+func (r *ExampleRepository) ExistsByName(ctx context.Context, name string) (bool, error) {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	for _, e := range r.examples {
+		if e.Name == name {
+			return true, nil
+		}
+	}
+	return false, nil
+}

services/preferences-api/internal/api/handlers/example.go

@@ -0,0 +1,170 @@
+package handlers
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/google/uuid"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/app"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/httperror"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/httpresponse"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/service"
+)
+
+// Example handles HTTP requests for example resources.
+type Example struct {
+	svc    *service.ExampleService
+	logger *logging.Logger
+}
+
+// NewExample creates a new Example handler with injected dependencies.
+func NewExample(svc *service.ExampleService, logger *logging.Logger) *Example {
+	return &Example{
+		svc:    svc,
+		logger: logger.WithComponent("ExampleHandler"),
+	}
+}
+
+// CreateRequest is the request body for creating an example.
+type CreateRequest struct {
+	Name        string `json:"name" validate:"required,min=1,max=100"`
+	Description string `json:"description" validate:"max=500"`
+}
+
+// UpdateRequest is the request body for updating an example.
+type UpdateRequest struct {
+	Name        string `json:"name" validate:"required,min=1,max=100"`
+	Description string `json:"description" validate:"max=500"`
+}
+
+// ExampleResponse is the response for an example resource.
+type ExampleResponse struct {
+	ID          string `json:"id"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	CreatedAt   string `json:"created_at"`
+	UpdatedAt   string `json:"updated_at"`
+}
+
+// toResponse converts a domain example to an API response.
+func toResponse(e *domain.Example) ExampleResponse {
+	return ExampleResponse{
+		ID:          e.ID.String(),
+		Name:        e.Name,
+		Description: e.Description,
+		CreatedAt:   e.CreatedAt.Format("2006-01-02T15:04:05Z"),
+		UpdatedAt:   e.UpdatedAt.Format("2006-01-02T15:04:05Z"),
+	}
+}
+
+// List returns all examples.
+func (h *Example) List(w http.ResponseWriter, r *http.Request) error {
+	examples, err := h.svc.List(r.Context())
+	if err != nil {
+		return err
+	}
+
+	result := make([]ExampleResponse, len(examples))
+	for i, e := range examples {
+		result[i] = toResponse(&e)
+	}
+
+	httpresponse.OK(w, r, result)
+	return nil
+}
+
+// Get returns an example by ID.
+func (h *Example) Get(w http.ResponseWriter, r *http.Request) error {
+	id := chi.URLParam(r, "id")
+
+	// Validate UUID format
+	if _, err := uuid.Parse(id); err != nil {
+		return httperror.BadRequest("invalid id format")
+	}
+
+	example, err := h.svc.Get(r.Context(), domain.ExampleID(id))
+	if err != nil {
+		return mapDomainError(err)
+	}
+
+	httpresponse.OK(w, r, toResponse(example))
+	return nil
+}
+
+// Create creates a new example.
+func (h *Example) Create(w http.ResponseWriter, r *http.Request) error {
+	var req CreateRequest
+	if err := app.BindAndValidate(r, &req); err != nil {
+		return err
+	}
+
+	example, err := h.svc.Create(r.Context(), service.CreateInput{
+		Name:        req.Name,
+		Description: req.Description,
+	})
+	if err != nil {
+		return mapDomainError(err)
+	}
+
+	httpresponse.Created(w, r, toResponse(example))
+	return nil
+}
+
+// Update updates an existing example.
+func (h *Example) Update(w http.ResponseWriter, r *http.Request) error {
+	id := chi.URLParam(r, "id")
+
+	if _, err := uuid.Parse(id); err != nil {
+		return httperror.BadRequest("invalid id format")
+	}
+
+	var req UpdateRequest
+	if err := app.BindAndValidate(r, &req); err != nil {
+		return err
+	}
+
+	example, err := h.svc.Update(r.Context(), domain.ExampleID(id), service.UpdateInput{
+		Name:        req.Name,
+		Description: req.Description,
+	})
+	if err != nil {
+		return mapDomainError(err)
+	}
+
+	httpresponse.OK(w, r, toResponse(example))
+	return nil
+}
+
+// Delete removes an example by ID.
+func (h *Example) Delete(w http.ResponseWriter, r *http.Request) error {
+	id := chi.URLParam(r, "id")
+
+	if _, err := uuid.Parse(id); err != nil {
+		return httperror.BadRequest("invalid id format")
+	}
+
+	if err := h.svc.Delete(r.Context(), domain.ExampleID(id)); err != nil {
+		return mapDomainError(err)
+	}
+
+	httpresponse.NoContent(w)
+	return nil
+}
+
+// mapDomainError converts domain errors to HTTP errors.
+func mapDomainError(err error) error {
+	switch {
+	case errors.Is(err, domain.ErrExampleNotFound):
+		return httperror.NotFound("example not found")
+	case errors.Is(err, domain.ErrDuplicateExample):
+		return httperror.Conflict("example with this name already exists")
+	case errors.Is(err, domain.ErrInvalidExampleName):
+		return httperror.BadRequest("invalid example name")
+	default:
+		return err
+	}
+}

services/preferences-api/internal/api/handlers/example_test.go

@@ -0,0 +1,402 @@
+package handlers
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"sync"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/port"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/service"
+)
+
+// mockExampleRepository implements port.ExampleRepository for testing.
+type mockExampleRepository struct {
+	mu       sync.RWMutex
+	examples map[domain.ExampleID]*domain.Example
+}
+
+var _ port.ExampleRepository = (*mockExampleRepository)(nil)
+
+func newMockExampleRepository() *mockExampleRepository {
+	return &mockExampleRepository{
+		examples: make(map[domain.ExampleID]*domain.Example),
+	}
+}
+
+func (m *mockExampleRepository) List(ctx context.Context) ([]domain.Example, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	result := make([]domain.Example, 0, len(m.examples))
+	for _, e := range m.examples {
+		result = append(result, *e)
+	}
+	return result, nil
+}
+
+func (m *mockExampleRepository) Get(ctx context.Context, id domain.ExampleID) (*domain.Example, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	e, ok := m.examples[id]
+	if !ok {
+		return nil, domain.ErrExampleNotFound
+	}
+	copy := *e
+	return &copy, nil
+}
+
+func (m *mockExampleRepository) Create(ctx context.Context, example *domain.Example) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	copy := *example
+	m.examples[example.ID] = &copy
+	return nil
+}
+
+func (m *mockExampleRepository) Update(ctx context.Context, example *domain.Example) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.examples[example.ID]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	copy := *example
+	m.examples[example.ID] = &copy
+	return nil
+}
+
+func (m *mockExampleRepository) Delete(ctx context.Context, id domain.ExampleID) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.examples[id]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	delete(m.examples, id)
+	return nil
+}
+
+func (m *mockExampleRepository) ExistsByName(ctx context.Context, name string) (bool, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	for _, e := range m.examples {
+		if e.Name == name {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func newTestHandler() (*Example, *mockExampleRepository) {
+	repo := newMockExampleRepository()
+	svc := service.NewExampleService(repo, logging.Nop())
+	handler := NewExample(svc, logging.Nop())
+	return handler, repo
+}
+
+func TestExample_List(t *testing.T) {
+	handler, repo := newTestHandler()
+
+	// Seed data
+	ex, _ := domain.NewExample("test-id-1", "Test Example", "Description")
+	_ = repo.Create(context.Background(), ex)
+
+	r := chi.NewRouter()
+	r.Get("/api/v1/examples", func(w http.ResponseWriter, r *http.Request) {
+		if err := handler.List(w, r); err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/examples", nil)
+	w := httptest.NewRecorder()
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("expected status 200, got %d", w.Code)
+	}
+
+	var resp map[string]any
+	if err := json.NewDecoder(w.Body).Decode(&resp); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+
+	data, ok := resp["data"]
+	if !ok {
+		t.Fatal("expected 'data' field in response")
+	}
+
+	items, ok := data.([]any)
+	if !ok {
+		t.Fatal("expected 'data' to be an array")
+	}
+
+	if len(items) != 1 {
+		t.Errorf("expected 1 item, got %d", len(items))
+	}
+}
+
+func TestExample_Get(t *testing.T) {
+	handler, repo := newTestHandler()
+
+	// Seed data
+	ex, _ := domain.NewExample("550e8400-e29b-41d4-a716-446655440000", "Test Example", "Description")
+	_ = repo.Create(context.Background(), ex)
+
+	tests := []struct {
+		name       string
+		id         string
+		wantStatus int
+	}{
+		{
+			name:       "valid uuid - found",
+			id:         "550e8400-e29b-41d4-a716-446655440000",
+			wantStatus: http.StatusOK,
+		},
+		{
+			name:       "valid uuid - not found",
+			id:         "550e8400-e29b-41d4-a716-446655440001",
+			wantStatus: http.StatusNotFound,
+		},
+		{
+			name:       "invalid uuid",
+			id:         "not-a-uuid",
+			wantStatus: http.StatusBadRequest,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := chi.NewRouter()
+			r.Get("/api/v1/examples/{id}", func(w http.ResponseWriter, r *http.Request) {
+				if err := handler.Get(w, r); err != nil {
+					// Map error to status for testing
+					switch tt.wantStatus {
+					case http.StatusNotFound:
+						w.WriteHeader(http.StatusNotFound)
+					case http.StatusBadRequest:
+						w.WriteHeader(http.StatusBadRequest)
+					default:
+						w.WriteHeader(http.StatusInternalServerError)
+					}
+					return
+				}
+			})
+
+			req := httptest.NewRequest(http.MethodGet, "/api/v1/examples/"+tt.id, nil)
+			w := httptest.NewRecorder()
+			r.ServeHTTP(w, req)
+
+			if w.Code != tt.wantStatus {
+				t.Errorf("expected status %d, got %d", tt.wantStatus, w.Code)
+			}
+		})
+	}
+}
+
+func TestExample_Create(t *testing.T) {
+	handler, repo := newTestHandler()
+
+	// Seed existing data for duplicate test
+	ex, _ := domain.NewExample("existing-id", "Existing Name", "")
+	_ = repo.Create(context.Background(), ex)
+
+	tests := []struct {
+		name       string
+		body       any
+		wantStatus int
+	}{
+		{
+			name: "valid request",
+			body: CreateRequest{
+				Name:        "New Example",
+				Description: "A test description",
+			},
+			wantStatus: http.StatusCreated,
+		},
+		{
+			name:       "empty body",
+			body:       nil,
+			wantStatus: http.StatusBadRequest,
+		},
+		{
+			name: "duplicate name",
+			body: CreateRequest{
+				Name:        "Existing Name",
+				Description: "Conflict",
+			},
+			wantStatus: http.StatusConflict,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := chi.NewRouter()
+			r.Post("/api/v1/examples", func(w http.ResponseWriter, r *http.Request) {
+				if err := handler.Create(w, r); err != nil {
+					switch tt.wantStatus {
+					case http.StatusBadRequest:
+						w.WriteHeader(http.StatusBadRequest)
+					case http.StatusConflict:
+						w.WriteHeader(http.StatusConflict)
+					default:
+						w.WriteHeader(http.StatusInternalServerError)
+					}
+					return
+				}
+			})
+
+			var body []byte
+			if tt.body != nil {
+				var err error
+				body, err = json.Marshal(tt.body)
+				if err != nil {
+					t.Fatalf("failed to marshal body: %v", err)
+				}
+			}
+
+			req := httptest.NewRequest(http.MethodPost, "/api/v1/examples", bytes.NewReader(body))
+			req.Header.Set("Content-Type", "application/json")
+			w := httptest.NewRecorder()
+			r.ServeHTTP(w, req)
+
+			if w.Code != tt.wantStatus {
+				t.Errorf("expected status %d, got %d", tt.wantStatus, w.Code)
+			}
+		})
+	}
+}
+
+func TestExample_Delete(t *testing.T) {
+	handler, repo := newTestHandler()
+
+	// Seed data
+	ex, _ := domain.NewExample("550e8400-e29b-41d4-a716-446655440000", "To Delete", "")
+	_ = repo.Create(context.Background(), ex)
+
+	tests := []struct {
+		name       string
+		id         string
+		wantStatus int
+	}{
+		{
+			name:       "existing example",
+			id:         "550e8400-e29b-41d4-a716-446655440000",
+			wantStatus: http.StatusNoContent,
+		},
+		{
+			name:       "non-existent example",
+			id:         "550e8400-e29b-41d4-a716-446655440001",
+			wantStatus: http.StatusNotFound,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := chi.NewRouter()
+			r.Delete("/api/v1/examples/{id}", func(w http.ResponseWriter, r *http.Request) {
+				if err := handler.Delete(w, r); err != nil {
+					if tt.wantStatus == http.StatusNotFound {
+						w.WriteHeader(http.StatusNotFound)
+					} else {
+						w.WriteHeader(http.StatusBadRequest)
+					}
+					return
+				}
+			})
+
+			req := httptest.NewRequest(http.MethodDelete, "/api/v1/examples/"+tt.id, nil)
+			w := httptest.NewRecorder()
+			r.ServeHTTP(w, req)
+
+			if w.Code != tt.wantStatus {
+				t.Errorf("expected status %d, got %d", tt.wantStatus, w.Code)
+			}
+		})
+	}
+}
+
+func TestExample_Update(t *testing.T) {
+	handler, repo := newTestHandler()
+
+	// Seed data
+	ex1, _ := domain.NewExample("550e8400-e29b-41d4-a716-446655440000", "Example 1", "")
+	_ = repo.Create(context.Background(), ex1)
+	ex2, _ := domain.NewExample("550e8400-e29b-41d4-a716-446655440001", "Example 2", "")
+	_ = repo.Create(context.Background(), ex2)
+
+	tests := []struct {
+		name       string
+		id         string
+		body       UpdateRequest
+		wantStatus int
+	}{
+		{
+			name: "valid update",
+			id:   "550e8400-e29b-41d4-a716-446655440000",
+			body: UpdateRequest{
+				Name:        "Updated Name",
+				Description: "Updated",
+			},
+			wantStatus: http.StatusOK,
+		},
+		{
+			name: "name conflict",
+			id:   "550e8400-e29b-41d4-a716-446655440000",
+			body: UpdateRequest{
+				Name:        "Example 2",
+				Description: "Conflict",
+			},
+			wantStatus: http.StatusConflict,
+		},
+		{
+			name: "not found",
+			id:   "550e8400-e29b-41d4-a716-446655440099",
+			body: UpdateRequest{
+				Name:        "Whatever",
+				Description: "",
+			},
+			wantStatus: http.StatusNotFound,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := chi.NewRouter()
+			r.Put("/api/v1/examples/{id}", func(w http.ResponseWriter, r *http.Request) {
+				if err := handler.Update(w, r); err != nil {
+					switch tt.wantStatus {
+					case http.StatusNotFound:
+						w.WriteHeader(http.StatusNotFound)
+					case http.StatusConflict:
+						w.WriteHeader(http.StatusConflict)
+					default:
+						w.WriteHeader(http.StatusBadRequest)
+					}
+					return
+				}
+			})
+
+			body, _ := json.Marshal(tt.body)
+			req := httptest.NewRequest(http.MethodPut, "/api/v1/examples/"+tt.id, bytes.NewReader(body))
+			req.Header.Set("Content-Type", "application/json")
+			w := httptest.NewRecorder()
+			r.ServeHTTP(w, req)
+
+			if w.Code != tt.wantStatus {
+				t.Errorf("expected status %d, got %d", tt.wantStatus, w.Code)
+			}
+		})
+	}
+}

services/preferences-api/internal/api/handlers/health.go

@@ -0,0 +1,26 @@
+package handlers
+
+import (
+	"net/http"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/httpresponse"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+)
+
+// Health handles health check endpoints.
+type Health struct {
+	logger *logging.Logger
+}
+
+// NewHealth creates a new Health handler.
+func NewHealth(logger *logging.Logger) *Health {
+	return &Health{logger: logger}
+}
+
+// Check returns the service health status.
+func (h *Health) Check(w http.ResponseWriter, r *http.Request) {
+	httpresponse.OK(w, r, map[string]string{
+		"service": "preferences-api",
+		"status":  "healthy",
+	})
+}

services/preferences-api/internal/api/routes.go

@@ -0,0 +1,54 @@
+// Package api provides HTTP routing and handlers for the preferences-api service.
+package api
+
+import (
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/app"
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/auth"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/api/handlers"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/config"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/service"
+)
+
+// RegisterRoutes registers all HTTP routes for the service.
+// Routes are mounted under /api/preferences-api to match the ingress path routing.
+// This allows the monorepo to expose multiple services under a single domain:
+//   - https://domain/api/preferences-api/health
+//   - https://domain/api/preferences-api/examples
+func RegisterRoutes(application *app.App, exampleService *service.ExampleService) {
+	logger := application.Logger()
+	cfg := config.Load()
+
+	// Initialize handlers with injected services
+	healthHandler := handlers.NewHealth(logger)
+	exampleHandler := handlers.NewExample(exampleService, logger)
+
+	// Build and mount OpenAPI spec
+	spec := NewServiceSpec()
+	application.EnableDocs(spec)
+
+	// Register API routes under /api/{service-name} to match ingress path routing.
+	// The ingress routes /api/preferences-api/* to this service.
+	application.Route("/api/preferences-api", func(r app.Router) {
+		r.Get("/health", healthHandler.Check)
+
+		// Public routes (no auth required)
+		r.Get("/examples", app.Wrap(exampleHandler.List))
+		r.Get("/examples/{id}", app.Wrap(exampleHandler.Get))
+
+		// Protected routes (auth required when enabled)
+		r.Group(func(r app.Router) {
+			if cfg.AuthEnabled {
+				r.Use(auth.Middleware(auth.MiddlewareConfig{
+					Validator: auth.NewJWTValidator(auth.JWTConfig{
+						Secret: []byte(cfg.JWTSecret),
+						Issuer: "slate-complete-1770512537",
+					}),
+				}))
+			}
+
+			r.Post("/examples", app.Wrap(exampleHandler.Create))
+			r.Put("/examples/{id}", app.Wrap(exampleHandler.Update))
+			r.Delete("/examples/{id}", app.Wrap(exampleHandler.Delete))
+		})
+	})
+}

services/preferences-api/internal/api/spec.go

@@ -0,0 +1,112 @@
+package api
+
+import "git.threesix.ai/jordan/slate-complete-1770512537/pkg/openapi"
+
+// NewServiceSpec builds the OpenAPI specification for the preferences-api service.
+func NewServiceSpec() *openapi.OpenAPISpec {
+	spec := openapi.NewOpenAPISpec("preferences-api API", "1.0.0").
+		WithDescription("REST API for the preferences-api service").
+		WithBearerSecurity("bearer", "JWT authentication token").
+		WithTag("Health", "Service health endpoints").
+		WithTag("Examples", "Example CRUD endpoints")
+
+	// Define reusable schemas
+	spec.WithSchema("Example", openapi.Object(map[string]openapi.Schema{
+		"id":          openapi.UUID().WithDescription("Unique identifier"),
+		"name":        openapi.String().WithDescription("Name of the example").WithExample("My Example"),
+		"description": openapi.String().WithDescription("Optional description").WithExample("A description"),
+		"created_at":  openapi.DateTime().WithDescription("Creation timestamp"),
+		"updated_at":  openapi.DateTime().WithDescription("Last update timestamp"),
+	}, "id", "name"))
+
+	spec.WithSchema("CreateExampleRequest", openapi.Object(map[string]openapi.Schema{
+		"name":        openapi.StringWithMinMax(1, 100).WithDescription("Name of the example"),
+		"description": openapi.StringWithMinMax(0, 500).WithDescription("Optional description"),
+	}, "name"))
+
+	spec.WithSchema("UpdateExampleRequest", openapi.Object(map[string]openapi.Schema{
+		"name":        openapi.StringWithMinMax(1, 100).WithDescription("Updated name"),
+		"description": openapi.StringWithMinMax(0, 500).WithDescription("Updated description"),
+	}))
+
+	// Health
+	spec.AddPath("/api/preferences-api/health", "get", map[string]any{
+		"summary": "Health check",
+		"tags":    []string{"Health"},
+		"responses": map[string]any{
+			"200": openapi.OpResponse("Service is healthy", openapi.Object(map[string]openapi.Schema{
+				"service": openapi.String(),
+				"status":  openapi.String(),
+			})),
+		},
+	})
+
+	// List examples
+	spec.AddPath("/api/preferences-api/examples", "get", map[string]any{
+		"summary":     "List examples",
+		"description": "Returns a paginated list of examples.",
+		"tags":        []string{"Examples"},
+		"parameters":  []any{openapi.PageParam(), openapi.PerPageParam()},
+		"responses": map[string]any{
+			"200": openapi.OpResponse("Success", openapi.ResponseSchema(openapi.RefArray("Example"))),
+		},
+	})
+
+	// Get example
+	spec.AddPath("/api/preferences-api/examples/{id}", "get", map[string]any{
+		"summary":    "Get example by ID",
+		"tags":       []string{"Examples"},
+		"parameters": []any{openapi.IDParam()},
+		"responses": map[string]any{
+			"200": openapi.OpResponse("Success", openapi.ResponseSchema(openapi.Ref("Example"))),
+			"404": openapi.OpResponse("Not found", openapi.ErrorResponseSchema()),
+		},
+	})
+
+	// Create example
+	spec.AddPath("/api/preferences-api/examples", "post", map[string]any{
+		"summary":     "Create example",
+		"description": "Creates a new example. Requires authentication.",
+		"tags":        []string{"Examples"},
+		"security":    []map[string][]string{{"bearer": {}}},
+		"requestBody": openapi.RequestBody(openapi.Ref("CreateExampleRequest"), true),
+		"responses": map[string]any{
+			"201": openapi.OpResponse("Created", openapi.ResponseSchema(openapi.Ref("Example"))),
+			"400": openapi.OpResponse("Bad request", openapi.ErrorResponseSchema()),
+			"401": openapi.OpResponse("Unauthorized", openapi.ErrorResponseSchema()),
+			"422": openapi.OpResponse("Validation error", openapi.ErrorResponseSchema()),
+		},
+	})
+
+	// Update example
+	spec.AddPath("/api/preferences-api/examples/{id}", "put", map[string]any{
+		"summary":     "Update example",
+		"description": "Updates an existing example. Requires authentication.",
+		"tags":        []string{"Examples"},
+		"security":    []map[string][]string{{"bearer": {}}},
+		"parameters":  []any{openapi.IDParam()},
+		"requestBody": openapi.RequestBody(openapi.Ref("UpdateExampleRequest"), true),
+		"responses": map[string]any{
+			"200": openapi.OpResponse("Updated", openapi.ResponseSchema(openapi.Ref("Example"))),
+			"400": openapi.OpResponse("Bad request", openapi.ErrorResponseSchema()),
+			"401": openapi.OpResponse("Unauthorized", openapi.ErrorResponseSchema()),
+			"404": openapi.OpResponse("Not found", openapi.ErrorResponseSchema()),
+		},
+	})
+
+	// Delete example
+	spec.AddPath("/api/preferences-api/examples/{id}", "delete", map[string]any{
+		"summary":     "Delete example",
+		"description": "Deletes an example by ID. Requires authentication.",
+		"tags":        []string{"Examples"},
+		"security":    []map[string][]string{{"bearer": {}}},
+		"parameters":  []any{openapi.IDParam()},
+		"responses": map[string]any{
+			"204": openapi.OpResponseNoContent(),
+			"401": openapi.OpResponse("Unauthorized", openapi.ErrorResponseSchema()),
+			"404": openapi.OpResponse("Not found", openapi.ErrorResponseSchema()),
+		},
+	})
+
+	return spec
+}

services/preferences-api/internal/config/config.go

@@ -0,0 +1,34 @@
+// Package config provides service-specific configuration.
+package config
+
+import (
+	"os"
+	"strings"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/config"
+)
+
+// Config extends the base config with preferences-api-specific settings.
+type Config struct {
+	config.AppConfig
+	Server   config.ServerConfig
+	Database config.DatabaseConfig
+	Logging  config.LoggingConfig
+
+	// Auth
+	AuthEnabled bool
+	JWTSecret   string
+}
+
+// Load reads configuration from environment variables.
+func Load() *Config {
+	return &Config{
+		AppConfig: config.ReadAppConfig(),
+		Server:    config.ReadServerConfig(),
+		Database:  config.ReadDatabaseConfig(),
+		Logging:   config.ReadLoggingConfig(),
+
+		AuthEnabled: strings.EqualFold(os.Getenv("AUTH_ENABLED"), "true"),
+		JWTSecret:   os.Getenv("JWT_SECRET"),
+	}
+}

services/preferences-api/internal/domain/errors.go

@@ -0,0 +1,21 @@
+// Package domain contains pure domain models with no external dependencies.
+// These types represent the core business concepts of the service.
+package domain
+
+import "errors"
+
+// Domain errors - these are business-level errors that should be translated
+// to appropriate HTTP status codes by the handler layer.
+var (
+	// ErrNotFound indicates a requested resource does not exist.
+	ErrNotFound = errors.New("not found")
+
+	// ErrExampleNotFound indicates the requested example does not exist.
+	ErrExampleNotFound = errors.New("example not found")
+
+	// ErrDuplicateExample indicates an example with the same name already exists.
+	ErrDuplicateExample = errors.New("example with this name already exists")
+
+	// ErrInvalidExampleName indicates the example name is invalid.
+	ErrInvalidExampleName = errors.New("invalid example name")
+)

services/preferences-api/internal/domain/example.go

@@ -0,0 +1,89 @@
+package domain
+
+import (
+	"time"
+	"unicode/utf8"
+)
+
+// ExampleID is a strongly-typed identifier for examples.
+type ExampleID string
+
+// String returns the string representation of the ID.
+func (id ExampleID) String() string {
+	return string(id)
+}
+
+// IsZero returns true if the ID is empty.
+func (id ExampleID) IsZero() bool {
+	return id == ""
+}
+
+// Example name constraints.
+const (
+	MinExampleNameLen = 1
+	MaxExampleNameLen = 100
+	MaxDescriptionLen = 500
+)
+
+// Example represents an example domain entity.
+// This is a pure domain model with no external dependencies.
+type Example struct {
+	ID          ExampleID
+	Name        string
+	Description string
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+}
+
+// NewExample creates a new Example with validation.
+// Returns ErrInvalidExampleName if the name is invalid.
+func NewExample(id ExampleID, name, description string) (*Example, error) {
+	if err := validateExampleName(name); err != nil {
+		return nil, err
+	}
+	if err := validateDescription(description); err != nil {
+		return nil, err
+	}
+
+	now := time.Now().UTC()
+	return &Example{
+		ID:          id,
+		Name:        name,
+		Description: description,
+		CreatedAt:   now,
+		UpdatedAt:   now,
+	}, nil
+}
+
+// Update modifies the example's mutable fields with validation.
+// Returns ErrInvalidExampleName if the name is invalid.
+func (e *Example) Update(name, description string) error {
+	if err := validateExampleName(name); err != nil {
+		return err
+	}
+	if err := validateDescription(description); err != nil {
+		return err
+	}
+
+	e.Name = name
+	e.Description = description
+	e.UpdatedAt = time.Now().UTC()
+	return nil
+}
+
+// validateExampleName validates an example name.
+func validateExampleName(name string) error {
+	length := utf8.RuneCountInString(name)
+	if length < MinExampleNameLen || length > MaxExampleNameLen {
+		return ErrInvalidExampleName
+	}
+	return nil
+}
+
+// validateDescription validates a description.
+func validateDescription(desc string) error {
+	if utf8.RuneCountInString(desc) > MaxDescriptionLen {
+		return ErrInvalidExampleName
+	}
+	return nil
+}

services/preferences-api/internal/port/example.go

@@ -0,0 +1,37 @@
+// Package port defines interfaces (ports) for external dependencies.
+// These interfaces define the contracts between the application core and
+// infrastructure adapters, enabling testability and flexibility.
+package port
+
+import (
+	"context"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+)
+
+// ExampleRepository defines the interface for example persistence operations.
+// Implementations may use databases, in-memory storage, or external services.
+type ExampleRepository interface {
+	// List returns all examples.
+	List(ctx context.Context) ([]domain.Example, error)
+
+	// Get returns an example by ID.
+	// Returns domain.ErrExampleNotFound if not found.
+	Get(ctx context.Context, id domain.ExampleID) (*domain.Example, error)
+
+	// Create stores a new example.
+	// The example must have a valid ID set.
+	Create(ctx context.Context, example *domain.Example) error
+
+	// Update modifies an existing example.
+	// Returns domain.ErrExampleNotFound if not found.
+	Update(ctx context.Context, example *domain.Example) error
+
+	// Delete removes an example by ID.
+	// Returns domain.ErrExampleNotFound if not found.
+	Delete(ctx context.Context, id domain.ExampleID) error
+
+	// ExistsByName checks if an example with the given name exists.
+	// Used for duplicate detection.
+	ExistsByName(ctx context.Context, name string) (bool, error)
+}

services/preferences-api/internal/service/example.go

@@ -0,0 +1,137 @@
+// Package service provides business logic / use cases for the application.
+// Services orchestrate domain operations using port interfaces.
+package service
+
+import (
+	"context"
+	"errors"
+
+	"github.com/google/uuid"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/port"
+)
+
+// ExampleService handles example-related business logic.
+type ExampleService struct {
+	repo   port.ExampleRepository
+	logger *logging.Logger
+}
+
+// NewExampleService creates a new example service.
+func NewExampleService(repo port.ExampleRepository, logger *logging.Logger) *ExampleService {
+	return &ExampleService{
+		repo:   repo,
+		logger: logger.WithService("ExampleService"),
+	}
+}
+
+// List returns all examples.
+func (s *ExampleService) List(ctx context.Context) ([]domain.Example, error) {
+	return s.repo.List(ctx)
+}
+
+// Get returns an example by ID.
+// Returns domain.ErrExampleNotFound if not found.
+func (s *ExampleService) Get(ctx context.Context, id domain.ExampleID) (*domain.Example, error) {
+	return s.repo.Get(ctx, id)
+}
+
+// CreateInput contains the data needed to create an example.
+type CreateInput struct {
+	Name        string
+	Description string
+}
+
+// Create creates a new example with duplicate detection.
+// Returns domain.ErrDuplicateExample if name already exists.
+// Returns domain.ErrInvalidExampleName if name is invalid.
+func (s *ExampleService) Create(ctx context.Context, input CreateInput) (*domain.Example, error) {
+	// Check for duplicates
+	exists, err := s.repo.ExistsByName(ctx, input.Name)
+	if err != nil {
+		return nil, err
+	}
+	if exists {
+		return nil, domain.ErrDuplicateExample
+	}
+
+	// Generate new ID
+	id := domain.ExampleID(uuid.New().String())
+
+	// Create domain entity (validates name)
+	example, err := domain.NewExample(id, input.Name, input.Description)
+	if err != nil {
+		return nil, err
+	}
+
+	// Persist
+	if err := s.repo.Create(ctx, example); err != nil {
+		return nil, err
+	}
+
+	s.logger.Info("example created", "id", id, "name", input.Name)
+	return example, nil
+}
+
+// UpdateInput contains the data needed to update an example.
+type UpdateInput struct {
+	Name        string
+	Description string
+}
+
+// Update modifies an existing example.
+// Returns domain.ErrExampleNotFound if not found.
+// Returns domain.ErrDuplicateExample if new name conflicts with another example.
+// Returns domain.ErrInvalidExampleName if name is invalid.
+func (s *ExampleService) Update(ctx context.Context, id domain.ExampleID, input UpdateInput) (*domain.Example, error) {
+	// Fetch existing
+	example, err := s.repo.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check for name conflicts (only if name changed)
+	if example.Name != input.Name {
+		exists, err := s.repo.ExistsByName(ctx, input.Name)
+		if err != nil {
+			return nil, err
+		}
+		if exists {
+			return nil, domain.ErrDuplicateExample
+		}
+	}
+
+	// Update domain entity (validates name)
+	if err := example.Update(input.Name, input.Description); err != nil {
+		return nil, err
+	}
+
+	// Persist
+	if err := s.repo.Update(ctx, example); err != nil {
+		return nil, err
+	}
+
+	s.logger.Info("example updated", "id", id, "name", input.Name)
+	return example, nil
+}
+
+// Delete removes an example by ID.
+// Returns domain.ErrExampleNotFound if not found.
+func (s *ExampleService) Delete(ctx context.Context, id domain.ExampleID) error {
+	// Verify exists before delete
+	if _, err := s.repo.Get(ctx, id); err != nil {
+		if errors.Is(err, domain.ErrExampleNotFound) {
+			return domain.ErrExampleNotFound
+		}
+		return err
+	}
+
+	if err := s.repo.Delete(ctx, id); err != nil {
+		return err
+	}
+
+	s.logger.Info("example deleted", "id", id)
+	return nil
+}

services/preferences-api/internal/service/example_test.go

@@ -0,0 +1,282 @@
+package service
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	"git.threesix.ai/jordan/slate-complete-1770512537/pkg/logging"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/domain"
+	"git.threesix.ai/jordan/slate-complete-1770512537/services/preferences-api/internal/port"
+)
+
+// mockExampleRepository implements port.ExampleRepository for testing.
+type mockExampleRepository struct {
+	mu       sync.RWMutex
+	examples map[domain.ExampleID]*domain.Example
+}
+
+var _ port.ExampleRepository = (*mockExampleRepository)(nil)
+
+func newMockExampleRepository() *mockExampleRepository {
+	return &mockExampleRepository{
+		examples: make(map[domain.ExampleID]*domain.Example),
+	}
+}
+
+func (m *mockExampleRepository) List(ctx context.Context) ([]domain.Example, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	result := make([]domain.Example, 0, len(m.examples))
+	for _, e := range m.examples {
+		result = append(result, *e)
+	}
+	return result, nil
+}
+
+func (m *mockExampleRepository) Get(ctx context.Context, id domain.ExampleID) (*domain.Example, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	e, ok := m.examples[id]
+	if !ok {
+		return nil, domain.ErrExampleNotFound
+	}
+	// Return a copy to avoid mutation
+	copy := *e
+	return &copy, nil
+}
+
+func (m *mockExampleRepository) Create(ctx context.Context, example *domain.Example) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	// Store a copy
+	copy := *example
+	m.examples[example.ID] = &copy
+	return nil
+}
+
+func (m *mockExampleRepository) Update(ctx context.Context, example *domain.Example) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.examples[example.ID]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	// Store a copy
+	copy := *example
+	m.examples[example.ID] = &copy
+	return nil
+}
+
+func (m *mockExampleRepository) Delete(ctx context.Context, id domain.ExampleID) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.examples[id]; !ok {
+		return domain.ErrExampleNotFound
+	}
+	delete(m.examples, id)
+	return nil
+}
+
+func (m *mockExampleRepository) ExistsByName(ctx context.Context, name string) (bool, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	for _, e := range m.examples {
+		if e.Name == name {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func TestExampleService_Create(t *testing.T) {
+	repo := newMockExampleRepository()
+	svc := NewExampleService(repo, logging.Nop())
+
+	t.Run("creates example successfully", func(t *testing.T) {
+		example, err := svc.Create(context.Background(), CreateInput{
+			Name:        "Test Example",
+			Description: "A test description",
+		})
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if example.Name != "Test Example" {
+			t.Errorf("expected name 'Test Example', got '%s'", example.Name)
+		}
+		if example.ID.IsZero() {
+			t.Error("expected non-empty ID")
+		}
+	})
+
+	t.Run("rejects duplicate name", func(t *testing.T) {
+		_, err := svc.Create(context.Background(), CreateInput{
+			Name:        "Test Example",
+			Description: "Another description",
+		})
+		if err != domain.ErrDuplicateExample {
+			t.Errorf("expected ErrDuplicateExample, got %v", err)
+		}
+	})
+
+	t.Run("rejects empty name", func(t *testing.T) {
+		_, err := svc.Create(context.Background(), CreateInput{
+			Name:        "",
+			Description: "Description",
+		})
+		if err != domain.ErrInvalidExampleName {
+			t.Errorf("expected ErrInvalidExampleName, got %v", err)
+		}
+	})
+}
+
+func TestExampleService_Get(t *testing.T) {
+	repo := newMockExampleRepository()
+	svc := NewExampleService(repo, logging.Nop())
+
+	// Create an example first
+	created, _ := svc.Create(context.Background(), CreateInput{
+		Name:        "Get Test",
+		Description: "Description",
+	})
+
+	t.Run("returns existing example", func(t *testing.T) {
+		example, err := svc.Get(context.Background(), created.ID)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if example.Name != "Get Test" {
+			t.Errorf("expected name 'Get Test', got '%s'", example.Name)
+		}
+	})
+
+	t.Run("returns not found for missing example", func(t *testing.T) {
+		_, err := svc.Get(context.Background(), "nonexistent-id")
+		if err != domain.ErrExampleNotFound {
+			t.Errorf("expected ErrExampleNotFound, got %v", err)
+		}
+	})
+}
+
+func TestExampleService_Update(t *testing.T) {
+	repo := newMockExampleRepository()
+	svc := NewExampleService(repo, logging.Nop())
+
+	// Create examples
+	example1, _ := svc.Create(context.Background(), CreateInput{
+		Name:        "Update Test 1",
+		Description: "Original",
+	})
+	_, _ = svc.Create(context.Background(), CreateInput{
+		Name:        "Update Test 2",
+		Description: "Other",
+	})
+
+	t.Run("updates example successfully", func(t *testing.T) {
+		updated, err := svc.Update(context.Background(), example1.ID, UpdateInput{
+			Name:        "Updated Name",
+			Description: "Updated description",
+		})
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if updated.Name != "Updated Name" {
+			t.Errorf("expected name 'Updated Name', got '%s'", updated.Name)
+		}
+	})
+
+	t.Run("allows same name on same example", func(t *testing.T) {
+		_, err := svc.Update(context.Background(), example1.ID, UpdateInput{
+			Name:        "Updated Name",
+			Description: "Same name",
+		})
+		if err != nil {
+			t.Errorf("unexpected error updating with same name: %v", err)
+		}
+	})
+
+	t.Run("rejects name conflict", func(t *testing.T) {
+		_, err := svc.Update(context.Background(), example1.ID, UpdateInput{
+			Name:        "Update Test 2",
+			Description: "Conflict",
+		})
+		if err != domain.ErrDuplicateExample {
+			t.Errorf("expected ErrDuplicateExample, got %v", err)
+		}
+	})
+
+	t.Run("returns not found for missing example", func(t *testing.T) {
+		_, err := svc.Update(context.Background(), "nonexistent-id", UpdateInput{
+			Name:        "Anything",
+			Description: "",
+		})
+		if err != domain.ErrExampleNotFound {
+			t.Errorf("expected ErrExampleNotFound, got %v", err)
+		}
+	})
+}
+
+func TestExampleService_Delete(t *testing.T) {
+	repo := newMockExampleRepository()
+	svc := NewExampleService(repo, logging.Nop())
+
+	// Create an example first
+	created, _ := svc.Create(context.Background(), CreateInput{
+		Name:        "Delete Test",
+		Description: "To be deleted",
+	})
+
+	t.Run("deletes example successfully", func(t *testing.T) {
+		err := svc.Delete(context.Background(), created.ID)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+
+		// Verify deleted
+		_, err = svc.Get(context.Background(), created.ID)
+		if err != domain.ErrExampleNotFound {
+			t.Errorf("expected ErrExampleNotFound after delete, got %v", err)
+		}
+	})
+
+	t.Run("returns not found for missing example", func(t *testing.T) {
+		err := svc.Delete(context.Background(), "nonexistent-id")
+		if err != domain.ErrExampleNotFound {
+			t.Errorf("expected ErrExampleNotFound, got %v", err)
+		}
+	})
+}
+
+func TestExampleService_List(t *testing.T) {
+	repo := newMockExampleRepository()
+	svc := NewExampleService(repo, logging.Nop())
+
+	t.Run("returns empty list initially", func(t *testing.T) {
+		examples, err := svc.List(context.Background())
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if len(examples) != 0 {
+			t.Errorf("expected 0 examples, got %d", len(examples))
+		}
+	})
+
+	// Create some examples
+	_, _ = svc.Create(context.Background(), CreateInput{Name: "List Test 1", Description: ""})
+	_, _ = svc.Create(context.Background(), CreateInput{Name: "List Test 2", Description: ""})
+
+	t.Run("returns all examples", func(t *testing.T) {
+		examples, err := svc.List(context.Background())
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if len(examples) != 2 {
+			t.Errorf("expected 2 examples, got %d", len(examples))
+		}
+	})
+}