G-1: renewal-policies API + frontend FK-drift fix

Three frontend call sites (OnboardingWizard.tsx:603, CertificatesPage.tsx:52,
CertificateDetailPage.tsx:169) populated the renewal_policy_id dropdown from
getPolicies() — the compliance-rule endpoint returning pol-* IDs — which
violated the FK managed_certificates.renewal_policy_id REFERENCES
renewal_policies(id) ON DELETE RESTRICT. Create would fail pg 23503 at insert.

Backend (new):
- RenewalPolicyRepository CRUD + ListAll/ExistsByID (pg 23503 → ErrRenewalPolicyInUse
  → HTTP 409; pg 23505 → ErrRenewalPolicyDuplicateName → HTTP 409)
- RenewalPolicyService with repo-only constructor. Service sentinels
  var-alias the repo sentinels so errors.Is walks across layers.
- RenewalPolicyHandler with validation bounds: name 1–255;
  renewal_window_days [1,365] default 30; max_retries [0,10] not defaulted;
  retry_interval_seconds [60,86400] default 3600; alert_thresholds_days
  [0,365] default [30,14,7,0]. Auto-generated IDs rp-<slug(name)>.
- Router registers 5 routes under /api/v1/renewal-policies[/{id}].

Frontend:
- CertificatesPage/CertificateDetailPage/OnboardingWizard now call
  getRenewalPolicies() and render rp-* IDs.
- client.ts adds getRenewalPolicies/createRenewalPolicy/updateRenewalPolicy/
  deleteRenewalPolicy. types.ts adds the RenewalPolicy shape.

OpenAPI: RenewalPolicies tag + 5 operations + 3 schemas (RenewalPolicy,
RenewalPolicyCreateRequest, RenewalPolicyUpdateRequest). 409 responses
on create/update duplicate-name and delete FK-in-use.

No migration — renewal_policies table already exists from the initial
schema (000001).

Tests:
- internal/service/renewal_policy_test.go: CRUD + validation + sentinel
  error wrapping.
- internal/api/handler/renewal_policy_handler_test.go: handler endpoint
  contracts including 400/404/409.
- web/src/api/client.test.ts: 4 subtests covering the 4 new API functions.

Phase 3 gates all green: go vet, build, short tests, race tests (service/
handler/router/scheduler), staticcheck (G-1 packages), govulncheck (0
reachable), coverage (service 69.7%, handler 79.0%, domain 86.9%,
middleware 80.6% — all above thresholds), tsc, vitest (256 passed),
vite build, OpenAPI structural validation.

internal/api/handler/renewal_policy.go

@@ -0,0 +1,243 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/shankar0123/certctl/internal/api/middleware"
+	"github.com/shankar0123/certctl/internal/domain"
+	"github.com/shankar0123/certctl/internal/service"
+)
+
+// RenewalPolicyService defines the service interface for renewal policy
+// operations. G-1: all methods take ctx so the handler can propagate
+// request-scoped cancellation/deadlines through the full stack.
+type RenewalPolicyService interface {
+	ListRenewalPolicies(ctx context.Context, page, perPage int) ([]domain.RenewalPolicy, int64, error)
+	GetRenewalPolicy(ctx context.Context, id string) (*domain.RenewalPolicy, error)
+	CreateRenewalPolicy(ctx context.Context, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error)
+	UpdateRenewalPolicy(ctx context.Context, id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error)
+	DeleteRenewalPolicy(ctx context.Context, id string) error
+}
+
+// RenewalPolicyHandler serves /api/v1/renewal-policies CRUD endpoints.
+//
+// G-1 design note: the service-level `ErrRenewalPolicyDuplicateName` /
+// `ErrRenewalPolicyInUse` sentinels alias the repository sentinels (same var
+// identity), so `errors.Is` walks transparently across layers. Delete/Update
+// not-found detection intentionally uses a `strings.Contains(err.Error(),
+// "not found")` substring check — the repo wraps `sql.ErrNoRows` as
+// `fmt.Errorf("renewal policy not found: %s", id)` which strips the sentinel,
+// and the handler red-tests' `ErrMockNotFound = errors.New("mock not found
+// error")` follows the same substring convention.
+type RenewalPolicyHandler struct {
+	svc RenewalPolicyService
+}
+
+// NewRenewalPolicyHandler constructs the handler with its service dependency.
+// Returned by value to match the house pattern (PolicyHandler, IssuerHandler
+// etc.) — the registry stores handlers by value in router.HandlerRegistry.
+func NewRenewalPolicyHandler(svc RenewalPolicyService) RenewalPolicyHandler {
+	return RenewalPolicyHandler{svc: svc}
+}
+
+// ListRenewalPolicies lists all renewal policies (paginated).
+// GET /api/v1/renewal-policies?page=1&per_page=50
+func (h RenewalPolicyHandler) ListRenewalPolicies(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		Error(w, http.StatusMethodNotAllowed, "Method not allowed")
+		return
+	}
+
+	requestID := middleware.GetRequestID(r.Context())
+
+	page := 1
+	perPage := 50
+	query := r.URL.Query()
+	if p := query.Get("page"); p != "" {
+		if parsed, err := strconv.Atoi(p); err == nil && parsed > 0 {
+			page = parsed
+		}
+	}
+	if pp := query.Get("per_page"); pp != "" {
+		if parsed, err := strconv.Atoi(pp); err == nil && parsed > 0 && parsed <= 500 {
+			perPage = parsed
+		}
+	}
+
+	policies, total, err := h.svc.ListRenewalPolicies(r.Context(), page, perPage)
+	if err != nil {
+		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to list renewal policies", requestID)
+		return
+	}
+
+	response := PagedResponse{
+		Data:    policies,
+		Total:   total,
+		Page:    page,
+		PerPage: perPage,
+	}
+
+	JSON(w, http.StatusOK, response)
+}
+
+// GetRenewalPolicy retrieves a single renewal policy by ID.
+// GET /api/v1/renewal-policies/{id}
+func (h RenewalPolicyHandler) GetRenewalPolicy(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		Error(w, http.StatusMethodNotAllowed, "Method not allowed")
+		return
+	}
+
+	requestID := middleware.GetRequestID(r.Context())
+
+	id := strings.TrimPrefix(r.URL.Path, "/api/v1/renewal-policies/")
+	parts := strings.Split(id, "/")
+	if len(parts) == 0 || parts[0] == "" {
+		ErrorWithRequestID(w, http.StatusBadRequest, "Renewal policy ID is required", requestID)
+		return
+	}
+	id = parts[0]
+
+	policy, err := h.svc.GetRenewalPolicy(r.Context(), id)
+	if err != nil {
+		// Matches the PolicyHandler.GetPolicy convention: any error from the
+		// service surfaces as 404. The repo wraps sql.ErrNoRows as
+		// "renewal policy not found: %s" and there's no other expected failure
+		// mode on Get — the caller gets a clean 404.
+		ErrorWithRequestID(w, http.StatusNotFound, "Renewal policy not found", requestID)
+		return
+	}
+
+	JSON(w, http.StatusOK, policy)
+}
+
+// CreateRenewalPolicy inserts a new renewal policy.
+// POST /api/v1/renewal-policies
+//
+// Error mapping:
+//   - invalid JSON / missing name  → 400
+//   - ErrRenewalPolicyDuplicateName (pg 23505 on name UNIQUE) → 409
+//   - anything else                → 500
+func (h RenewalPolicyHandler) CreateRenewalPolicy(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		Error(w, http.StatusMethodNotAllowed, "Method not allowed")
+		return
+	}
+
+	requestID := middleware.GetRequestID(r.Context())
+
+	var rp domain.RenewalPolicy
+	if err := json.NewDecoder(r.Body).Decode(&rp); err != nil {
+		ErrorWithRequestID(w, http.StatusBadRequest, "Invalid request body", requestID)
+		return
+	}
+
+	if err := ValidateRequired("name", rp.Name); err != nil {
+		ErrorWithRequestID(w, http.StatusBadRequest, err.Error(), requestID)
+		return
+	}
+
+	created, err := h.svc.CreateRenewalPolicy(r.Context(), rp)
+	if err != nil {
+		if errors.Is(err, service.ErrRenewalPolicyDuplicateName) {
+			ErrorWithRequestID(w, http.StatusConflict, "A renewal policy with that name already exists", requestID)
+			return
+		}
+		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to create renewal policy", requestID)
+		return
+	}
+
+	JSON(w, http.StatusCreated, created)
+}
+
+// UpdateRenewalPolicy replaces the fields of an existing renewal policy.
+// PUT /api/v1/renewal-policies/{id}
+//
+// Error mapping:
+//   - invalid JSON / empty ID      → 400
+//   - ErrRenewalPolicyDuplicateName → 409
+//   - error text contains "not found" → 404 (see struct doc comment re: substring check)
+//   - anything else                → 500
+func (h RenewalPolicyHandler) UpdateRenewalPolicy(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPut {
+		Error(w, http.StatusMethodNotAllowed, "Method not allowed")
+		return
+	}
+
+	requestID := middleware.GetRequestID(r.Context())
+
+	id := strings.TrimPrefix(r.URL.Path, "/api/v1/renewal-policies/")
+	parts := strings.Split(id, "/")
+	if len(parts) == 0 || parts[0] == "" {
+		ErrorWithRequestID(w, http.StatusBadRequest, "Renewal policy ID is required", requestID)
+		return
+	}
+	id = parts[0]
+
+	var rp domain.RenewalPolicy
+	if err := json.NewDecoder(r.Body).Decode(&rp); err != nil {
+		ErrorWithRequestID(w, http.StatusBadRequest, "Invalid request body", requestID)
+		return
+	}
+
+	updated, err := h.svc.UpdateRenewalPolicy(r.Context(), id, rp)
+	if err != nil {
+		if errors.Is(err, service.ErrRenewalPolicyDuplicateName) {
+			ErrorWithRequestID(w, http.StatusConflict, "A renewal policy with that name already exists", requestID)
+			return
+		}
+		if strings.Contains(err.Error(), "not found") {
+			ErrorWithRequestID(w, http.StatusNotFound, "Renewal policy not found", requestID)
+			return
+		}
+		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to update renewal policy", requestID)
+		return
+	}
+
+	JSON(w, http.StatusOK, updated)
+}
+
+// DeleteRenewalPolicy removes a renewal policy.
+// DELETE /api/v1/renewal-policies/{id}
+//
+// Error mapping:
+//   - empty ID (trailing slash)    → 400
+//   - ErrRenewalPolicyInUse (pg 23503 FK-RESTRICT against managed_certificates.renewal_policy_id) → 409
+//   - error text contains "not found" → 404
+//   - anything else                → 500
+func (h RenewalPolicyHandler) DeleteRenewalPolicy(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodDelete {
+		Error(w, http.StatusMethodNotAllowed, "Method not allowed")
+		return
+	}
+
+	requestID := middleware.GetRequestID(r.Context())
+
+	id := strings.TrimPrefix(r.URL.Path, "/api/v1/renewal-policies/")
+	parts := strings.Split(id, "/")
+	if len(parts) == 0 || parts[0] == "" {
+		ErrorWithRequestID(w, http.StatusBadRequest, "Renewal policy ID is required", requestID)
+		return
+	}
+	id = parts[0]
+
+	if err := h.svc.DeleteRenewalPolicy(r.Context(), id); err != nil {
+		if errors.Is(err, service.ErrRenewalPolicyInUse) {
+			ErrorWithRequestID(w, http.StatusConflict, "Renewal policy is still referenced by managed certificates", requestID)
+			return
+		}
+		if strings.Contains(err.Error(), "not found") {
+			ErrorWithRequestID(w, http.StatusNotFound, "Renewal policy not found", requestID)
+			return
+		}
+		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to delete renewal policy", requestID)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

internal/api/handler/renewal_policy_handler_test.go

@@ -0,0 +1,434 @@
+package handler
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/shankar0123/certctl/internal/domain"
+	"github.com/shankar0123/certctl/internal/service"
+)
+
+// G-1 red tests: lock in the HTTP surface of /api/v1/renewal-policies before
+// the production code exists. Every subtest here references a symbol that
+// Phase 2b must introduce:
+//
+//   - NewRenewalPolicyHandler(svc)             (constructor)
+//   - RenewalPolicyService                     (service-layer interface, in this package)
+//   - handler.ListRenewalPolicies / GetRenewalPolicy / CreateRenewalPolicy /
+//     UpdateRenewalPolicy / DeleteRenewalPolicy
+//   - service.ErrRenewalPolicyDuplicateName    (pg 23505 → 409 mapping)
+//   - service.ErrRenewalPolicyInUse            (pg 23503 → 409 mapping)
+
+// MockRenewalPolicyService is a mock implementation of RenewalPolicyService.
+type MockRenewalPolicyService struct {
+	ListRenewalPoliciesFn  func(page, perPage int) ([]domain.RenewalPolicy, int64, error)
+	GetRenewalPolicyFn     func(id string) (*domain.RenewalPolicy, error)
+	CreateRenewalPolicyFn  func(rp domain.RenewalPolicy) (*domain.RenewalPolicy, error)
+	UpdateRenewalPolicyFn  func(id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error)
+	DeleteRenewalPolicyFn  func(id string) error
+}
+
+func (m *MockRenewalPolicyService) ListRenewalPolicies(_ context.Context, page, perPage int) ([]domain.RenewalPolicy, int64, error) {
+	if m.ListRenewalPoliciesFn != nil {
+		return m.ListRenewalPoliciesFn(page, perPage)
+	}
+	return nil, 0, nil
+}
+
+func (m *MockRenewalPolicyService) GetRenewalPolicy(_ context.Context, id string) (*domain.RenewalPolicy, error) {
+	if m.GetRenewalPolicyFn != nil {
+		return m.GetRenewalPolicyFn(id)
+	}
+	return nil, nil
+}
+
+func (m *MockRenewalPolicyService) CreateRenewalPolicy(_ context.Context, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+	if m.CreateRenewalPolicyFn != nil {
+		return m.CreateRenewalPolicyFn(rp)
+	}
+	return nil, nil
+}
+
+func (m *MockRenewalPolicyService) UpdateRenewalPolicy(_ context.Context, id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+	if m.UpdateRenewalPolicyFn != nil {
+		return m.UpdateRenewalPolicyFn(id, rp)
+	}
+	return nil, nil
+}
+
+func (m *MockRenewalPolicyService) DeleteRenewalPolicy(_ context.Context, id string) error {
+	if m.DeleteRenewalPolicyFn != nil {
+		return m.DeleteRenewalPolicyFn(id)
+	}
+	return nil
+}
+
+// ----- List -----
+
+func TestListRenewalPolicies_Success(t *testing.T) {
+	now := time.Now()
+	rp1 := domain.RenewalPolicy{
+		ID: "rp-default", Name: "Default", RenewalWindowDays: 30,
+		MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	rp2 := domain.RenewalPolicy{
+		ID: "rp-urgent", Name: "Urgent", RenewalWindowDays: 7,
+		MaxRetries: 5, RetryInterval: 600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+
+	mock := &MockRenewalPolicyService{
+		ListRenewalPoliciesFn: func(page, perPage int) ([]domain.RenewalPolicy, int64, error) {
+			return []domain.RenewalPolicy{rp1, rp2}, 2, nil
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/renewal-policies", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.ListRenewalPolicies(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected status 200, got %d", w.Code)
+	}
+
+	var resp PagedResponse
+	if err := json.NewDecoder(w.Body).Decode(&resp); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+	if resp.Total != 2 {
+		t.Errorf("expected total 2, got %d", resp.Total)
+	}
+}
+
+func TestListRenewalPolicies_ServiceError(t *testing.T) {
+	mock := &MockRenewalPolicyService{
+		ListRenewalPoliciesFn: func(page, perPage int) ([]domain.RenewalPolicy, int64, error) {
+			return nil, 0, ErrMockServiceFailed
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/renewal-policies", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.ListRenewalPolicies(w, req)
+
+	if w.Code != http.StatusInternalServerError {
+		t.Fatalf("expected status 500, got %d", w.Code)
+	}
+}
+
+func TestListRenewalPolicies_MethodNotAllowed(t *testing.T) {
+	handler := NewRenewalPolicyHandler(&MockRenewalPolicyService{})
+	req := httptest.NewRequest(http.MethodDelete, "/api/v1/renewal-policies", nil)
+	w := httptest.NewRecorder()
+
+	handler.ListRenewalPolicies(w, req)
+
+	if w.Code != http.StatusMethodNotAllowed {
+		t.Fatalf("expected status 405, got %d", w.Code)
+	}
+}
+
+// ----- Get -----
+
+func TestGetRenewalPolicy_Success(t *testing.T) {
+	now := time.Now()
+	mock := &MockRenewalPolicyService{
+		GetRenewalPolicyFn: func(id string) (*domain.RenewalPolicy, error) {
+			return &domain.RenewalPolicy{
+				ID: id, Name: "Default", RenewalWindowDays: 30,
+				MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+				CreatedAt: now, UpdatedAt: now,
+			}, nil
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/renewal-policies/rp-default", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.GetRenewalPolicy(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected status 200, got %d", w.Code)
+	}
+}
+
+func TestGetRenewalPolicy_NotFound(t *testing.T) {
+	mock := &MockRenewalPolicyService{
+		GetRenewalPolicyFn: func(id string) (*domain.RenewalPolicy, error) {
+			return nil, ErrMockNotFound
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/renewal-policies/nonexistent", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.GetRenewalPolicy(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected status 404, got %d", w.Code)
+	}
+}
+
+// ----- Create -----
+
+func TestCreateRenewalPolicy_Success(t *testing.T) {
+	now := time.Now()
+	mock := &MockRenewalPolicyService{
+		CreateRenewalPolicyFn: func(rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+			rp.ID = "rp-new"
+			rp.CreatedAt = now
+			rp.UpdatedAt = now
+			return &rp, nil
+		},
+	}
+
+	body := map[string]interface{}{
+		"name":                  "New Policy",
+		"renewal_window_days":   30,
+		"max_retries":           3,
+		"retry_interval_seconds": 3600,
+		"auto_renew":            true,
+	}
+	bodyBytes, _ := json.Marshal(body)
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/renewal-policies", bytes.NewReader(bodyBytes))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.CreateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("expected status 201, got %d", w.Code)
+	}
+}
+
+func TestCreateRenewalPolicy_MissingName(t *testing.T) {
+	body := map[string]interface{}{
+		"renewal_window_days":   30,
+		"max_retries":           3,
+		"retry_interval_seconds": 3600,
+	}
+	bodyBytes, _ := json.Marshal(body)
+
+	handler := NewRenewalPolicyHandler(&MockRenewalPolicyService{})
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/renewal-policies", bytes.NewReader(bodyBytes))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.CreateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected status 400, got %d", w.Code)
+	}
+}
+
+func TestCreateRenewalPolicy_InvalidJSON(t *testing.T) {
+	handler := NewRenewalPolicyHandler(&MockRenewalPolicyService{})
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/renewal-policies", bytes.NewReader([]byte("not json")))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.CreateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected status 400, got %d", w.Code)
+	}
+}
+
+func TestCreateRenewalPolicy_DuplicateName(t *testing.T) {
+	// Service bubbles up ErrRenewalPolicyDuplicateName (pg 23505) → handler maps to 409.
+	mock := &MockRenewalPolicyService{
+		CreateRenewalPolicyFn: func(rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+			return nil, service.ErrRenewalPolicyDuplicateName
+		},
+	}
+
+	body := map[string]interface{}{
+		"name":                  "Duplicate",
+		"renewal_window_days":   30,
+		"max_retries":           3,
+		"retry_interval_seconds": 3600,
+	}
+	bodyBytes, _ := json.Marshal(body)
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/renewal-policies", bytes.NewReader(bodyBytes))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.CreateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusConflict {
+		t.Fatalf("expected status 409 on duplicate name, got %d", w.Code)
+	}
+}
+
+func TestCreateRenewalPolicy_MethodNotAllowed(t *testing.T) {
+	handler := NewRenewalPolicyHandler(&MockRenewalPolicyService{})
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/renewal-policies", nil)
+	w := httptest.NewRecorder()
+
+	handler.CreateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusMethodNotAllowed {
+		t.Fatalf("expected status 405, got %d", w.Code)
+	}
+}
+
+// ----- Update -----
+
+func TestUpdateRenewalPolicy_Success(t *testing.T) {
+	now := time.Now()
+	mock := &MockRenewalPolicyService{
+		UpdateRenewalPolicyFn: func(id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+			return &domain.RenewalPolicy{
+				ID: id, Name: rp.Name, RenewalWindowDays: rp.RenewalWindowDays,
+				MaxRetries: rp.MaxRetries, RetryInterval: rp.RetryInterval,
+				AutoRenew: rp.AutoRenew,
+				CreatedAt: now, UpdatedAt: now,
+			}, nil
+		},
+	}
+
+	body := map[string]interface{}{
+		"name":                  "Updated Policy",
+		"renewal_window_days":   45,
+		"max_retries":           5,
+		"retry_interval_seconds": 1800,
+		"auto_renew":            true,
+	}
+	bodyBytes, _ := json.Marshal(body)
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodPut, "/api/v1/renewal-policies/rp-default", bytes.NewReader(bodyBytes))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.UpdateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected status 200, got %d", w.Code)
+	}
+}
+
+func TestUpdateRenewalPolicy_NotFound(t *testing.T) {
+	mock := &MockRenewalPolicyService{
+		UpdateRenewalPolicyFn: func(id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+			return nil, ErrMockNotFound
+		},
+	}
+
+	body := map[string]interface{}{
+		"name":                  "Updated",
+		"renewal_window_days":   30,
+		"max_retries":           3,
+		"retry_interval_seconds": 3600,
+	}
+	bodyBytes, _ := json.Marshal(body)
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodPut, "/api/v1/renewal-policies/rp-missing", bytes.NewReader(bodyBytes))
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.UpdateRenewalPolicy(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected status 404, got %d", w.Code)
+	}
+}
+
+// ----- Delete -----
+
+func TestDeleteRenewalPolicy_Success(t *testing.T) {
+	var deletedID string
+	mock := &MockRenewalPolicyService{
+		DeleteRenewalPolicyFn: func(id string) error {
+			deletedID = id
+			return nil
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodDelete, "/api/v1/renewal-policies/rp-default", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.DeleteRenewalPolicy(w, req)
+
+	if w.Code != http.StatusNoContent {
+		t.Fatalf("expected status 204, got %d", w.Code)
+	}
+	if deletedID != "rp-default" {
+		t.Errorf("expected deleted ID 'rp-default', got '%s'", deletedID)
+	}
+}
+
+func TestDeleteRenewalPolicy_NotFound(t *testing.T) {
+	mock := &MockRenewalPolicyService{
+		DeleteRenewalPolicyFn: func(id string) error {
+			return ErrMockNotFound
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodDelete, "/api/v1/renewal-policies/rp-missing", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.DeleteRenewalPolicy(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected status 404, got %d", w.Code)
+	}
+}
+
+func TestDeleteRenewalPolicy_InUseConflict(t *testing.T) {
+	// Service bubbles up ErrRenewalPolicyInUse (pg 23503 FK-RESTRICT) → handler maps to 409.
+	mock := &MockRenewalPolicyService{
+		DeleteRenewalPolicyFn: func(id string) error {
+			return service.ErrRenewalPolicyInUse
+		},
+	}
+
+	handler := NewRenewalPolicyHandler(mock)
+	req := httptest.NewRequest(http.MethodDelete, "/api/v1/renewal-policies/rp-active", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.DeleteRenewalPolicy(w, req)
+
+	if w.Code != http.StatusConflict {
+		t.Fatalf("expected status 409 on in-use conflict, got %d", w.Code)
+	}
+}
+
+func TestDeleteRenewalPolicy_EmptyID(t *testing.T) {
+	handler := NewRenewalPolicyHandler(&MockRenewalPolicyService{})
+	req := httptest.NewRequest(http.MethodDelete, "/api/v1/renewal-policies/", nil)
+	req = req.WithContext(contextWithRequestID())
+	w := httptest.NewRecorder()
+
+	handler.DeleteRenewalPolicy(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected status 400, got %d", w.Code)
+	}
+}

internal/api/router/router.go

@@ -65,8 +65,9 @@ type HandlerRegistry struct {
 	Verification   handler.VerificationHandler
 	Export         handler.ExportHandler
 	Digest         handler.DigestHandler
-	HealthChecks   *handler.HealthCheckHandler
-	BulkRevocation handler.BulkRevocationHandler
+	HealthChecks    *handler.HealthCheckHandler
+	BulkRevocation  handler.BulkRevocationHandler
+	RenewalPolicies handler.RenewalPolicyHandler
 }
 
 // RegisterHandlers sets up all API routes with their handlers.
@@ -167,6 +168,18 @@ func (r *Router) RegisterHandlers(reg HandlerRegistry) {
 	r.Register("DELETE /api/v1/policies/{id}", http.HandlerFunc(reg.Policies.DeletePolicy))
 	r.Register("GET /api/v1/policies/{id}/violations", http.HandlerFunc(reg.Policies.ListViolations))
 
+	// Renewal Policies routes: /api/v1/renewal-policies
+	// G-1: fixes frontend FK drift — OnboardingWizard + CertificatesPage dropdowns
+	// were previously populating renewal_policy_id from /api/v1/policies (compliance
+	// rules, pol-* IDs), violating FK managed_certificates.renewal_policy_id →
+	// renewal_policies(id) ON DELETE RESTRICT. This block is the backend half; the
+	// frontend half swaps getPolicies → getRenewalPolicies at 3 call sites.
+	r.Register("GET /api/v1/renewal-policies", http.HandlerFunc(reg.RenewalPolicies.ListRenewalPolicies))
+	r.Register("POST /api/v1/renewal-policies", http.HandlerFunc(reg.RenewalPolicies.CreateRenewalPolicy))
+	r.Register("GET /api/v1/renewal-policies/{id}", http.HandlerFunc(reg.RenewalPolicies.GetRenewalPolicy))
+	r.Register("PUT /api/v1/renewal-policies/{id}", http.HandlerFunc(reg.RenewalPolicies.UpdateRenewalPolicy))
+	r.Register("DELETE /api/v1/renewal-policies/{id}", http.HandlerFunc(reg.RenewalPolicies.DeleteRenewalPolicy))
+
 	// Profiles routes: /api/v1/profiles
 	r.Register("GET /api/v1/profiles", http.HandlerFunc(reg.Profiles.ListProfiles))
 	r.Register("POST /api/v1/profiles", http.HandlerFunc(reg.Profiles.CreateProfile))

internal/integration/lifecycle_test.go

@@ -1151,6 +1151,25 @@ func (m *mockRenewalPolicyRepository) List(ctx context.Context) ([]*domain.Renew
 	return policies, nil
 }
 
+// Create/Update/Delete satisfy the G-1 interface extension. The integration
+// harness never drives the CRUD endpoints directly — these methods exist
+// purely for interface compliance so the binary still builds.
+func (m *mockRenewalPolicyRepository) Create(ctx context.Context, policy *domain.RenewalPolicy) error {
+	m.policies[policy.ID] = policy
+	return nil
+}
+
+func (m *mockRenewalPolicyRepository) Update(ctx context.Context, id string, policy *domain.RenewalPolicy) error {
+	policy.ID = id
+	m.policies[id] = policy
+	return nil
+}
+
+func (m *mockRenewalPolicyRepository) Delete(ctx context.Context, id string) error {
+	delete(m.policies, id)
+	return nil
+}
+
 type mockIssuerRepository struct {
 	issuers map[string]*domain.Issuer
 }

internal/repository/interfaces.go

@@ -2,11 +2,27 @@ package repository
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/shankar0123/certctl/internal/domain"
 )
 
+// Repository-level sentinel errors. Repositories (primarily the postgres
+// implementation) translate RDBMS-specific errors into these typed envelopes
+// so the service/handler layers can branch with errors.Is without importing
+// lib/pq or care about SQLSTATE codes.
+//
+// G-1: renewal-policy sentinels — DuplicateName → HTTP 409 (pg 23505 on
+// renewal_policies.name UNIQUE), InUse → HTTP 409 (pg 23503 on the FK from
+// managed_certificates.renewal_policy_id to renewal_policies.id with ON
+// DELETE RESTRICT). Both map onto the same 409 status but with distinct
+// messages so operators can tell them apart.
+var (
+	ErrRenewalPolicyDuplicateName = errors.New("renewal policy name already exists")
+	ErrRenewalPolicyInUse         = errors.New("renewal policy is still referenced by managed certificates")
+)
+
 // CertificateRepository defines operations for managing certificates.
 type CertificateRepository interface {
 	// List returns a paginated list of certificates matching the filter criteria.
@@ -258,11 +274,35 @@ type JobRepository interface {
 }
 
 // RenewalPolicyRepository defines operations for managing renewal policies.
+//
+// G-1: extended with Create/Update/Delete so the new /api/v1/renewal-policies
+// CRUD surface has a repo contract to lean on. Delete must map the PostgreSQL
+// 23503 (foreign_key_violation on managed_certificates.renewal_policy_id
+// REFERENCES renewal_policies(id) ON DELETE RESTRICT) onto the typed
+// ErrRenewalPolicyInUse sentinel so the handler can emit a 409 Conflict
+// instead of an opaque 500. Create/Update map PostgreSQL 23505
+// (unique_violation on renewal_policies.name) onto ErrRenewalPolicyDuplicateName
+// for the same 409 Conflict reason.
+//
+// List stays single-shot (no pagination params) because the production row
+// count is in the single digits — the service layer paginates/sorts in Go.
+// Changing the signature would churn every mock without functional benefit.
 type RenewalPolicyRepository interface {
 	// Get retrieves a renewal policy by ID.
 	Get(ctx context.Context, id string) (*domain.RenewalPolicy, error)
-	// List returns all renewal policies.
+	// List returns all renewal policies, ordered by name.
 	List(ctx context.Context) ([]*domain.RenewalPolicy, error)
+	// Create inserts a new renewal policy. The caller is responsible for
+	// populating Name; Create auto-generates ID (as rp-<slug(name)>) if empty.
+	// Returns ErrRenewalPolicyDuplicateName on pg 23505.
+	Create(ctx context.Context, policy *domain.RenewalPolicy) error
+	// Update modifies an existing renewal policy in-place. Returns
+	// sql.ErrNoRows-wrapped error when id is unknown, or
+	// ErrRenewalPolicyDuplicateName on pg 23505 (name collision with another row).
+	Update(ctx context.Context, id string, policy *domain.RenewalPolicy) error
+	// Delete removes a renewal policy. Returns ErrRenewalPolicyInUse when the
+	// policy is still referenced by rows in managed_certificates (pg 23503).
+	Delete(ctx context.Context, id string) error
 }
 
 // PolicyRepository defines operations for managing compliance policies and violations.

internal/repository/postgres/renewal_policy.go

@@ -4,46 +4,61 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/lib/pq"
 
 	"github.com/shankar0123/certctl/internal/domain"
+	"github.com/shankar0123/certctl/internal/repository"
 )
 
-// RenewalPolicyRepository implements repository.RenewalPolicyRepository
+// RenewalPolicyRepository implements repository.RenewalPolicyRepository.
 type RenewalPolicyRepository struct {
 	db *sql.DB
 }
 
-// NewRenewalPolicyRepository creates a new RenewalPolicyRepository
+// NewRenewalPolicyRepository creates a new RenewalPolicyRepository.
 func NewRenewalPolicyRepository(db *sql.DB) *RenewalPolicyRepository {
 	return &RenewalPolicyRepository{db: db}
 }
 
-// Get retrieves a renewal policy by ID
-func (r *RenewalPolicyRepository) Get(ctx context.Context, id string) (*domain.RenewalPolicy, error) {
+// SELECT column order is the shared contract between scanRenewalPolicy and
+// every SELECT/RETURNING in this file. Keep them in lockstep; if you add a
+// new column, add it to all SELECTs, all scan calls, and scanRenewalPolicy.
+//
+// Note: certificate_profile_id and agent_group_id live on renewal_policies
+// (migrations 000003 and 000004) but are deliberately NOT read here — that
+// pre-existing drift is out of G-1's minimum-viable-delta and is tracked in
+// the design doc §8. Introducing them would change struct shapes / JSON tags
+// and require domain-layer churn we're not taking on in this change.
+const renewalPolicyColumns = `
+	id, name, renewal_window_days, auto_renew, max_retries,
+	retry_interval_minutes, alert_thresholds_days, created_at, updated_at
+`
+
+// scanRenewalPolicy decodes one renewal_policies row from a Row or Rows
+// scanner, unmarshaling alert_thresholds_days JSONB into the domain slice.
+// Malformed JSONB silently falls back to DefaultAlertThresholds() — same
+// behavior as the pre-G-1 code so we don't change observable semantics.
+func scanRenewalPolicy(scanner interface {
+	Scan(dest ...any) error
+}) (*domain.RenewalPolicy, error) {
 	var policy domain.RenewalPolicy
 	var thresholdsJSON []byte
 
-	err := r.db.QueryRowContext(ctx, `
-		SELECT id, name, renewal_window_days, auto_renew, max_retries,
-		       retry_interval_minutes, alert_thresholds_days, created_at, updated_at
-		FROM renewal_policies
-		WHERE id = $1
-	`, id).Scan(&policy.ID, &policy.Name, &policy.RenewalWindowDays, &policy.AutoRenew,
+	if err := scanner.Scan(
+		&policy.ID, &policy.Name, &policy.RenewalWindowDays, &policy.AutoRenew,
 		&policy.MaxRetries, &policy.RetryInterval, &thresholdsJSON,
-		&policy.CreatedAt, &policy.UpdatedAt)
-
-	if err != nil {
-		if err == sql.ErrNoRows {
-			return nil, fmt.Errorf("renewal policy not found: %s", id)
-		}
-		return nil, fmt.Errorf("failed to query renewal policy: %w", err)
+		&policy.CreatedAt, &policy.UpdatedAt,
+	); err != nil {
+		return nil, err
 	}
 
-	// Parse alert thresholds from JSONB
 	if len(thresholdsJSON) > 0 {
 		if err := json.Unmarshal(thresholdsJSON, &policy.AlertThresholdsDays); err != nil {
-			// Fall back to defaults if JSON is malformed
 			policy.AlertThresholdsDays = domain.DefaultAlertThresholds()
 		}
 	}
@@ -51,14 +66,23 @@ func (r *RenewalPolicyRepository) Get(ctx context.Context, id string) (*domain.R
 	return &policy, nil
 }
 
-// List returns all renewal policies
+// Get retrieves a renewal policy by ID.
+func (r *RenewalPolicyRepository) Get(ctx context.Context, id string) (*domain.RenewalPolicy, error) {
+	row := r.db.QueryRowContext(ctx, `SELECT `+renewalPolicyColumns+` FROM renewal_policies WHERE id = $1`, id)
+	policy, err := scanRenewalPolicy(row)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("renewal policy not found: %s", id)
+		}
+		return nil, fmt.Errorf("failed to query renewal policy: %w", err)
+	}
+	return policy, nil
+}
+
+// List returns all renewal policies, ordered by name (matches the index on
+// renewal_policies.name from migration 000001 so ORDER BY is index-served).
 func (r *RenewalPolicyRepository) List(ctx context.Context) ([]*domain.RenewalPolicy, error) {
-	rows, err := r.db.QueryContext(ctx, `
-		SELECT id, name, renewal_window_days, auto_renew, max_retries,
-		       retry_interval_minutes, alert_thresholds_days, created_at, updated_at
-		FROM renewal_policies
-		ORDER BY name
-	`)
+	rows, err := r.db.QueryContext(ctx, `SELECT `+renewalPolicyColumns+` FROM renewal_policies ORDER BY name`)
 	if err != nil {
 		return nil, fmt.Errorf("failed to query renewal policies: %w", err)
 	}
@@ -66,22 +90,11 @@ func (r *RenewalPolicyRepository) List(ctx context.Context) ([]*domain.RenewalPo
 
 	var policies []*domain.RenewalPolicy
 	for rows.Next() {
-		var policy domain.RenewalPolicy
-		var thresholdsJSON []byte
-
-		if err := rows.Scan(&policy.ID, &policy.Name, &policy.RenewalWindowDays, &policy.AutoRenew,
-			&policy.MaxRetries, &policy.RetryInterval, &thresholdsJSON,
-			&policy.CreatedAt, &policy.UpdatedAt); err != nil {
+		policy, err := scanRenewalPolicy(rows)
+		if err != nil {
 			return nil, fmt.Errorf("failed to scan renewal policy: %w", err)
 		}
-
-		if len(thresholdsJSON) > 0 {
-			if err := json.Unmarshal(thresholdsJSON, &policy.AlertThresholdsDays); err != nil {
-				policy.AlertThresholdsDays = domain.DefaultAlertThresholds()
-			}
-		}
-
-		policies = append(policies, &policy)
+		policies = append(policies, policy)
 	}
 
 	if err := rows.Err(); err != nil {
@@ -90,3 +103,187 @@ func (r *RenewalPolicyRepository) List(ctx context.Context) ([]*domain.RenewalPo
 
 	return policies, nil
 }
+
+// slugRegex matches non-alphanumeric characters that slugifyPolicyName strips.
+var slugRegex = regexp.MustCompile(`[^a-z0-9-]+`)
+
+// slugifyPolicyName produces `rp-<slug>` for an auto-generated policy ID.
+// Slug: lowercase, spaces→hyphens, non-alphanumeric stripped, trimmed to 64
+// chars. Matches the existing seed convention (rp-default, rp-standard,
+// rp-urgent). Collision resolution is handled by Create's retry loop.
+func slugifyPolicyName(name string) string {
+	slug := strings.ToLower(strings.TrimSpace(name))
+	slug = strings.ReplaceAll(slug, " ", "-")
+	slug = slugRegex.ReplaceAllString(slug, "")
+	slug = strings.Trim(slug, "-")
+	if slug == "" {
+		slug = "policy"
+	}
+	if len(slug) > 64 {
+		slug = slug[:64]
+	}
+	return "rp-" + slug
+}
+
+// isUniqueViolation reports whether err is a PostgreSQL 23505 unique_violation.
+// Used by Create/Update to translate name-collision errors onto the typed
+// ErrRenewalPolicyDuplicateName sentinel.
+func isUniqueViolation(err error) bool {
+	var pqErr *pq.Error
+	return errors.As(err, &pqErr) && pqErr.Code == "23505"
+}
+
+// isForeignKeyViolation reports whether err is a PostgreSQL 23503
+// foreign_key_violation. Used by Delete to translate ON DELETE RESTRICT
+// failures onto the typed ErrRenewalPolicyInUse sentinel.
+func isForeignKeyViolation(err error) bool {
+	var pqErr *pq.Error
+	return errors.As(err, &pqErr) && pqErr.Code == "23503"
+}
+
+// Create inserts a new renewal policy. If policy.ID is empty, auto-generates
+// `rp-<slug(name)>` with -2/-3/... suffixes on collision (up to 10 attempts).
+// Returns ErrRenewalPolicyDuplicateName on pg 23505 (name collision).
+//
+// alert_thresholds_days is marshaled to JSONB here rather than relying on the
+// DB default because the service layer already applies DefaultAlertThresholds
+// for empty input — the DB default is a safety net, not the primary path.
+func (r *RenewalPolicyRepository) Create(ctx context.Context, policy *domain.RenewalPolicy) error {
+	if policy == nil {
+		return errors.New("renewal policy is nil")
+	}
+
+	thresholdsJSON, err := json.Marshal(policy.AlertThresholdsDays)
+	if err != nil {
+		return fmt.Errorf("failed to marshal alert thresholds: %w", err)
+	}
+
+	// ID auto-generation with collision retry. We attempt up to 10 suffix
+	// variants (rp-foo, rp-foo-2, ..., rp-foo-10) before giving up — the
+	// 23505 error the caller gets back past that point is on Name (their
+	// job to fix) rather than on a slug-collision we swallowed.
+	baseID := policy.ID
+	if baseID == "" {
+		baseID = slugifyPolicyName(policy.Name)
+	}
+
+	insertSQL := `
+		INSERT INTO renewal_policies (
+			id, name, renewal_window_days, auto_renew, max_retries,
+			retry_interval_minutes, alert_thresholds_days, created_at, updated_at
+		) VALUES ($1, $2, $3, $4, $5, $6, $7, NOW(), NOW())
+		RETURNING ` + renewalPolicyColumns
+
+	maxAttempts := 10
+	if policy.ID != "" {
+		// Caller supplied a specific ID — no collision-retry, just one shot.
+		maxAttempts = 1
+	}
+
+	for attempt := 1; attempt <= maxAttempts; attempt++ {
+		candidateID := baseID
+		if attempt > 1 {
+			candidateID = fmt.Sprintf("%s-%d", baseID, attempt)
+		}
+
+		row := r.db.QueryRowContext(ctx, insertSQL,
+			candidateID, policy.Name, policy.RenewalWindowDays, policy.AutoRenew,
+			policy.MaxRetries, policy.RetryInterval, thresholdsJSON,
+		)
+
+		inserted, scanErr := scanRenewalPolicy(row)
+		if scanErr == nil {
+			*policy = *inserted
+			return nil
+		}
+
+		if isUniqueViolation(scanErr) {
+			// Determine which unique constraint — if it's the name UNIQUE
+			// we can't recover (caller has to pick a new name); if it's the
+			// primary-key slug collision we loop to the next suffix.
+			var pqErr *pq.Error
+			errors.As(scanErr, &pqErr)
+			// Postgres reports the constraint name in pqErr.Constraint;
+			// renewal_policies_name_key is the name UNIQUE, renewal_policies_pkey
+			// is the PK. Name collision is terminal, PK collision is retryable.
+			if pqErr.Constraint != "" && !strings.Contains(pqErr.Constraint, "pkey") {
+				return repository.ErrRenewalPolicyDuplicateName
+			}
+			// PK collision — try next suffix.
+			continue
+		}
+
+		return fmt.Errorf("failed to insert renewal policy: %w", scanErr)
+	}
+
+	// Exhausted retry budget on PK collisions — surface as duplicate so the
+	// caller at least gets a 409 rather than a mysterious 500.
+	return repository.ErrRenewalPolicyDuplicateName
+}
+
+// Update modifies an existing renewal policy by ID. Returns an error wrapping
+// sql.ErrNoRows when id is unknown (detected by RETURNING returning zero rows),
+// or ErrRenewalPolicyDuplicateName on pg 23505 (name collision with another row).
+func (r *RenewalPolicyRepository) Update(ctx context.Context, id string, policy *domain.RenewalPolicy) error {
+	if policy == nil {
+		return errors.New("renewal policy is nil")
+	}
+
+	thresholdsJSON, err := json.Marshal(policy.AlertThresholdsDays)
+	if err != nil {
+		return fmt.Errorf("failed to marshal alert thresholds: %w", err)
+	}
+
+	row := r.db.QueryRowContext(ctx, `
+		UPDATE renewal_policies SET
+			name = $2,
+			renewal_window_days = $3,
+			auto_renew = $4,
+			max_retries = $5,
+			retry_interval_minutes = $6,
+			alert_thresholds_days = $7,
+			updated_at = NOW()
+		WHERE id = $1
+		RETURNING `+renewalPolicyColumns,
+		id, policy.Name, policy.RenewalWindowDays, policy.AutoRenew,
+		policy.MaxRetries, policy.RetryInterval, thresholdsJSON,
+	)
+
+	updated, err := scanRenewalPolicy(row)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return fmt.Errorf("renewal policy not found: %s", id)
+		}
+		if isUniqueViolation(err) {
+			return repository.ErrRenewalPolicyDuplicateName
+		}
+		return fmt.Errorf("failed to update renewal policy: %w", err)
+	}
+
+	*policy = *updated
+	return nil
+}
+
+// Delete removes a renewal policy by ID. Returns ErrRenewalPolicyInUse when
+// the policy is still referenced by rows in managed_certificates (pg 23503
+// foreign_key_violation against the ON DELETE RESTRICT FK from
+// managed_certificates.renewal_policy_id). Returns an error wrapping
+// sql.ErrNoRows when id is unknown.
+func (r *RenewalPolicyRepository) Delete(ctx context.Context, id string) error {
+	result, err := r.db.ExecContext(ctx, `DELETE FROM renewal_policies WHERE id = $1`, id)
+	if err != nil {
+		if isForeignKeyViolation(err) {
+			return repository.ErrRenewalPolicyInUse
+		}
+		return fmt.Errorf("failed to delete renewal policy: %w", err)
+	}
+
+	rows, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to read RowsAffected for delete: %w", err)
+	}
+	if rows == 0 {
+		return fmt.Errorf("renewal policy not found: %s", id)
+	}
+	return nil
+}

internal/service/renewal_policy.go

@@ -0,0 +1,211 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/shankar0123/certctl/internal/domain"
+	"github.com/shankar0123/certctl/internal/repository"
+)
+
+// G-1: service-level sentinels alias the repository sentinels so errors.Is
+// walks transparently across layers. Do NOT errors.New a fresh copy — the
+// handler's `errors.Is(err, repository.ErrRenewalPolicyInUse)` branch and
+// the service-layer tests' `errors.Is(err, service.ErrRenewalPolicyInUse)`
+// branch need to match the same sentinel var identity.
+var (
+	ErrRenewalPolicyDuplicateName = repository.ErrRenewalPolicyDuplicateName
+	ErrRenewalPolicyInUse         = repository.ErrRenewalPolicyInUse
+)
+
+// RenewalPolicyService implements the /api/v1/renewal-policies CRUD surface.
+//
+// G-1 scope note: the red-test contract pins NewRenewalPolicyService to a
+// repo-only signature (no auditService). Renewal-policy CRUD does not emit
+// audit events in this change — if audit coverage is needed later, add a
+// SetAuditService setter rather than churning the constructor signature.
+type RenewalPolicyService struct {
+	repo repository.RenewalPolicyRepository
+}
+
+// NewRenewalPolicyService constructs the service bound to its repository.
+func NewRenewalPolicyService(repo repository.RenewalPolicyRepository) *RenewalPolicyService {
+	return &RenewalPolicyService{repo: repo}
+}
+
+// rpSlugRegex matches non-alphanumeric characters that slugifyRenewalPolicyName strips.
+// Mirrors the identical regex in internal/repository/postgres/renewal_policy.go —
+// the service owns the rp-<slug> convention so the repo's retry loop is a
+// pure PK-collision safety net, not the primary ID generator.
+var rpSlugRegex = regexp.MustCompile(`[^a-z0-9-]+`)
+
+// slugifyRenewalPolicyName produces `rp-<slug>` for an auto-generated policy
+// ID. Slug: lowercase, spaces→hyphens, non-alphanumeric stripped, trimmed to
+// 64 chars. Matches the seed convention (rp-default, rp-standard, rp-urgent)
+// and the repo's slugifyPolicyName byte-for-byte.
+func slugifyRenewalPolicyName(name string) string {
+	slug := strings.ToLower(strings.TrimSpace(name))
+	slug = strings.ReplaceAll(slug, " ", "-")
+	slug = rpSlugRegex.ReplaceAllString(slug, "")
+	slug = strings.Trim(slug, "-")
+	if slug == "" {
+		slug = "policy"
+	}
+	if len(slug) > 64 {
+		slug = slug[:64]
+	}
+	return "rp-" + slug
+}
+
+// ListRenewalPolicies returns a single page of renewal policies sorted by
+// name (the repo's ORDER BY name is index-served via idx_renewal_policies_name).
+// Pagination is done in Go rather than SQL — the expected row count is in the
+// single digits so LIMIT/OFFSET would be premature optimization and would
+// churn the repo contract for no measurable benefit (design doc §Known
+// Caller Audit).
+//
+// Bounds: page defaults to 1, per_page defaults to 50, caps at 500 to match
+// the /api/v1/policies handler's behavior. Past-end slices return an empty
+// slice with no error — callers use `total` to detect end of pagination.
+func (s *RenewalPolicyService) ListRenewalPolicies(ctx context.Context, page, perPage int) ([]domain.RenewalPolicy, int64, error) {
+	if page < 1 {
+		page = 1
+	}
+	if perPage < 1 {
+		perPage = 50
+	}
+	if perPage > 500 {
+		perPage = 500
+	}
+
+	items, err := s.repo.List(ctx)
+	if err != nil {
+		return nil, 0, fmt.Errorf("failed to list renewal policies: %w", err)
+	}
+
+	total := int64(len(items))
+	start := (page - 1) * perPage
+	if start >= int(total) {
+		return nil, total, nil
+	}
+	end := start + perPage
+	if end > int(total) {
+		end = int(total)
+	}
+
+	out := make([]domain.RenewalPolicy, 0, end-start)
+	for _, p := range items[start:end] {
+		if p != nil {
+			out = append(out, *p)
+		}
+	}
+	return out, total, nil
+}
+
+// GetRenewalPolicy retrieves one renewal policy by ID. Not-found errors
+// surface from the repo verbatim; the handler translates them to 404.
+func (s *RenewalPolicyService) GetRenewalPolicy(ctx context.Context, id string) (*domain.RenewalPolicy, error) {
+	return s.repo.Get(ctx, id)
+}
+
+// validateBounds enforces the design doc §Validation Bounds invariants:
+//   - name required, ≤ 255 chars
+//   - renewal_window_days in [1, 365]
+//   - max_retries in [0, 10]
+//   - retry_interval_seconds in [60, 86400]
+//   - alert_thresholds_days each in [0, 365]
+//
+// Called after applyCreateDefaults so zero-value fields that the caller
+// expects to be defaulted don't trip the range checks.
+func (s *RenewalPolicyService) validateBounds(rp *domain.RenewalPolicy) error {
+	if strings.TrimSpace(rp.Name) == "" {
+		return fmt.Errorf("name is required")
+	}
+	if len(rp.Name) > 255 {
+		return fmt.Errorf("name must be 255 characters or fewer, got %d", len(rp.Name))
+	}
+	if rp.RenewalWindowDays < 1 || rp.RenewalWindowDays > 365 {
+		return fmt.Errorf("renewal_window_days must be between 1 and 365, got %d", rp.RenewalWindowDays)
+	}
+	if rp.MaxRetries < 0 || rp.MaxRetries > 10 {
+		return fmt.Errorf("max_retries must be between 0 and 10, got %d", rp.MaxRetries)
+	}
+	if rp.RetryInterval < 60 || rp.RetryInterval > 86400 {
+		return fmt.Errorf("retry_interval_seconds must be between 60 and 86400, got %d", rp.RetryInterval)
+	}
+	for i, t := range rp.AlertThresholdsDays {
+		if t < 0 || t > 365 {
+			return fmt.Errorf("alert_thresholds_days[%d]=%d must be between 0 and 365", i, t)
+		}
+	}
+	return nil
+}
+
+// applyCreateDefaults fills in zero-valued optional fields with the design
+// doc defaults. Name is never defaulted — missing name fails validation.
+// MaxRetries=0 is a legal explicit value (no retries), so it is NOT
+// defaulted; the DB default column handles that path if needed.
+func (s *RenewalPolicyService) applyCreateDefaults(rp *domain.RenewalPolicy) {
+	if rp.RenewalWindowDays == 0 {
+		rp.RenewalWindowDays = 30
+	}
+	if rp.RetryInterval == 0 {
+		rp.RetryInterval = 3600
+	}
+	if len(rp.AlertThresholdsDays) == 0 {
+		rp.AlertThresholdsDays = domain.DefaultAlertThresholds()
+	}
+}
+
+// CreateRenewalPolicy inserts a new renewal policy. Auto-generates
+// `rp-<slug(name)>` for ID if empty. Defaults are applied before bounds
+// validation so a caller can omit RenewalWindowDays / RetryInterval and
+// still pass bounds. Returns ErrRenewalPolicyDuplicateName unwrapped from
+// the repo when a name collision occurs (pg 23505 on the UNIQUE constraint);
+// the handler surfaces that as 409 Conflict.
+func (s *RenewalPolicyService) CreateRenewalPolicy(ctx context.Context, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+	s.applyCreateDefaults(&rp)
+	if err := s.validateBounds(&rp); err != nil {
+		return nil, err
+	}
+	if rp.ID == "" {
+		rp.ID = slugifyRenewalPolicyName(rp.Name)
+	}
+	if rp.CreatedAt.IsZero() {
+		rp.CreatedAt = time.Now()
+	}
+	if err := s.repo.Create(ctx, &rp); err != nil {
+		// Propagate repository sentinels verbatim — service-level sentinels
+		// alias repo sentinels (same var identity), so errors.Is walks
+		// through without any translation.
+		return nil, err
+	}
+	return &rp, nil
+}
+
+// UpdateRenewalPolicy replaces the fields of an existing renewal policy.
+// Applies the same defaults+bounds as Create so partial updates do not slip
+// an invalid row past validation via zero-value fields. id in the path wins
+// over any id the caller supplied in the body.
+func (s *RenewalPolicyService) UpdateRenewalPolicy(ctx context.Context, id string, rp domain.RenewalPolicy) (*domain.RenewalPolicy, error) {
+	s.applyCreateDefaults(&rp)
+	if err := s.validateBounds(&rp); err != nil {
+		return nil, err
+	}
+	rp.ID = id
+	if err := s.repo.Update(ctx, id, &rp); err != nil {
+		return nil, err
+	}
+	return &rp, nil
+}
+
+// DeleteRenewalPolicy removes a renewal policy. Returns ErrRenewalPolicyInUse
+// when the policy is still referenced by rows in managed_certificates (the
+// repo translates pg 23503 FK_RESTRICT violations onto that sentinel). The
+// handler surfaces that as 409 Conflict.
+func (s *RenewalPolicyService) DeleteRenewalPolicy(ctx context.Context, id string) error {
+	return s.repo.Delete(ctx, id)
+}

internal/service/renewal_policy_test.go

@@ -0,0 +1,341 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/shankar0123/certctl/internal/domain"
+)
+
+// G-1 red tests: lock in the behavior of RenewalPolicyService before
+// the production code exists. Every subtest here references a type or
+// method that Phase 2b must introduce:
+//
+//   - NewRenewalPolicyService(repo)          (constructor)
+//   - svc.ListRenewalPolicies(ctx, page, pp) ([]RenewalPolicy, int64, error)
+//   - svc.GetRenewalPolicy(ctx, id)           (*RenewalPolicy, error)
+//   - svc.CreateRenewalPolicy(ctx, rp)        (*RenewalPolicy, error)
+//   - svc.UpdateRenewalPolicy(ctx, id, rp)    (*RenewalPolicy, error)
+//   - svc.DeleteRenewalPolicy(ctx, id)         error
+//   - ErrRenewalPolicyDuplicateName            sentinel (pg 23505 → 409)
+//   - ErrRenewalPolicyInUse                    sentinel (pg 23503 → 409)
+//
+// Once Phase 2b lands, these should all turn green without modification.
+
+func TestRenewalPolicyService_List_Success(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	repo := &mockRenewalPolicyRepo{
+		Policies: map[string]*domain.RenewalPolicy{
+			"rp-default": {
+				ID: "rp-default", Name: "Default", RenewalWindowDays: 30,
+				MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+				CreatedAt: now, UpdatedAt: now,
+			},
+			"rp-urgent": {
+				ID: "rp-urgent", Name: "Urgent", RenewalWindowDays: 7,
+				MaxRetries: 5, RetryInterval: 600, AutoRenew: true,
+				CreatedAt: now, UpdatedAt: now,
+			},
+		},
+	}
+	svc := NewRenewalPolicyService(repo)
+
+	items, total, err := svc.ListRenewalPolicies(ctx, 1, 50)
+	if err != nil {
+		t.Fatalf("ListRenewalPolicies failed: %v", err)
+	}
+	if total != 2 {
+		t.Errorf("expected total 2, got %d", total)
+	}
+	if len(items) != 2 {
+		t.Errorf("expected 2 items, got %d", len(items))
+	}
+}
+
+func TestRenewalPolicyService_List_Empty(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	items, total, err := svc.ListRenewalPolicies(ctx, 1, 50)
+	if err != nil {
+		t.Fatalf("ListRenewalPolicies failed: %v", err)
+	}
+	if total != 0 {
+		t.Errorf("expected total 0, got %d", total)
+	}
+	if len(items) != 0 {
+		t.Errorf("expected 0 items, got %d", len(items))
+	}
+}
+
+func TestRenewalPolicyService_List_Pagination(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	// Seed 5 policies, names A..E so the mock's sort.Slice yields a deterministic
+	// ordering that pagination boundaries can assert against.
+	for _, name := range []string{"A", "B", "C", "D", "E"} {
+		p := &domain.RenewalPolicy{
+			ID: "rp-" + strings.ToLower(name), Name: name,
+			RenewalWindowDays: 30, MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+			CreatedAt: now, UpdatedAt: now,
+		}
+		repo.Policies[p.ID] = p
+	}
+	svc := NewRenewalPolicyService(repo)
+
+	// Page 1, size 2 → [A, B]
+	page1, total, err := svc.ListRenewalPolicies(ctx, 1, 2)
+	if err != nil {
+		t.Fatalf("page 1 failed: %v", err)
+	}
+	if total != 5 {
+		t.Errorf("expected total 5, got %d", total)
+	}
+	if len(page1) != 2 || page1[0].Name != "A" || page1[1].Name != "B" {
+		t.Errorf("unexpected page 1 slice: %+v", page1)
+	}
+
+	// Page 3, size 2 → [E]  (single-item last page)
+	page3, _, err := svc.ListRenewalPolicies(ctx, 3, 2)
+	if err != nil {
+		t.Fatalf("page 3 failed: %v", err)
+	}
+	if len(page3) != 1 || page3[0].Name != "E" {
+		t.Errorf("unexpected page 3 slice: %+v", page3)
+	}
+
+	// Page 4, size 2 → [] (past the end, no error)
+	page4, _, err := svc.ListRenewalPolicies(ctx, 4, 2)
+	if err != nil {
+		t.Fatalf("page 4 failed: %v", err)
+	}
+	if len(page4) != 0 {
+		t.Errorf("expected empty past-end slice, got %+v", page4)
+	}
+}
+
+func TestRenewalPolicyService_List_RepoError(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{
+		Policies: map[string]*domain.RenewalPolicy{},
+		ListErr:  errors.New("boom"),
+	}
+	svc := NewRenewalPolicyService(repo)
+
+	_, _, err := svc.ListRenewalPolicies(ctx, 1, 50)
+	if err == nil {
+		t.Fatal("expected error, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Get_Success(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	rp := &domain.RenewalPolicy{
+		ID: "rp-default", Name: "Default", RenewalWindowDays: 30,
+		MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{"rp-default": rp}}
+	svc := NewRenewalPolicyService(repo)
+
+	got, err := svc.GetRenewalPolicy(ctx, "rp-default")
+	if err != nil {
+		t.Fatalf("GetRenewalPolicy failed: %v", err)
+	}
+	if got.Name != "Default" {
+		t.Errorf("expected name Default, got %s", got.Name)
+	}
+}
+
+func TestRenewalPolicyService_Get_NotFound(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	_, err := svc.GetRenewalPolicy(ctx, "rp-missing")
+	if err == nil {
+		t.Fatal("expected error for missing policy, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Create_Success(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	rp := domain.RenewalPolicy{
+		Name:              "Weekly Renewal",
+		RenewalWindowDays: 7,
+		MaxRetries:        3,
+		RetryInterval:     3600,
+		AutoRenew:         true,
+	}
+	created, err := svc.CreateRenewalPolicy(ctx, rp)
+	if err != nil {
+		t.Fatalf("CreateRenewalPolicy failed: %v", err)
+	}
+	if created.ID == "" {
+		t.Fatal("expected auto-generated ID, got empty")
+	}
+	// ID convention: rp-<slug(name)> matches seed rows rp-default/rp-standard/rp-urgent.
+	if !strings.HasPrefix(created.ID, "rp-") {
+		t.Errorf("expected ID prefix rp-, got %s", created.ID)
+	}
+	if created.CreatedAt.IsZero() {
+		t.Error("expected CreatedAt to be populated")
+	}
+}
+
+func TestRenewalPolicyService_Create_MissingName(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	_, err := svc.CreateRenewalPolicy(ctx, domain.RenewalPolicy{
+		RenewalWindowDays: 30, MaxRetries: 3, RetryInterval: 3600,
+	})
+	if err == nil {
+		t.Fatal("expected validation error for missing name, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Create_BoundsViolation(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	// RenewalWindowDays out of range [1, 365]
+	_, err := svc.CreateRenewalPolicy(ctx, domain.RenewalPolicy{
+		Name:              "Bad Window",
+		RenewalWindowDays: 999,
+		MaxRetries:        3,
+		RetryInterval:     3600,
+	})
+	if err == nil {
+		t.Fatal("expected bounds violation on RenewalWindowDays, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Create_DuplicateName(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{
+		Policies:  map[string]*domain.RenewalPolicy{},
+		CreateErr: ErrRenewalPolicyDuplicateName,
+	}
+	svc := NewRenewalPolicyService(repo)
+
+	_, err := svc.CreateRenewalPolicy(ctx, domain.RenewalPolicy{
+		Name:              "Duplicate",
+		RenewalWindowDays: 30,
+		MaxRetries:        3,
+		RetryInterval:     3600,
+	})
+	if err == nil {
+		t.Fatal("expected duplicate-name error, got nil")
+	}
+	if !errors.Is(err, ErrRenewalPolicyDuplicateName) {
+		t.Errorf("expected ErrRenewalPolicyDuplicateName, got %v", err)
+	}
+}
+
+func TestRenewalPolicyService_Update_Success(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	rp := &domain.RenewalPolicy{
+		ID: "rp-default", Name: "Default", RenewalWindowDays: 30,
+		MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{"rp-default": rp}}
+	svc := NewRenewalPolicyService(repo)
+
+	updated, err := svc.UpdateRenewalPolicy(ctx, "rp-default", domain.RenewalPolicy{
+		Name:              "Default Renamed",
+		RenewalWindowDays: 45,
+		MaxRetries:        5,
+		RetryInterval:     1800,
+		AutoRenew:         true,
+	})
+	if err != nil {
+		t.Fatalf("UpdateRenewalPolicy failed: %v", err)
+	}
+	if updated.Name != "Default Renamed" {
+		t.Errorf("expected updated name, got %s", updated.Name)
+	}
+	if updated.RenewalWindowDays != 45 {
+		t.Errorf("expected window 45, got %d", updated.RenewalWindowDays)
+	}
+}
+
+func TestRenewalPolicyService_Update_NotFound(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	_, err := svc.UpdateRenewalPolicy(ctx, "rp-missing", domain.RenewalPolicy{
+		Name: "X", RenewalWindowDays: 30, MaxRetries: 3, RetryInterval: 3600,
+	})
+	if err == nil {
+		t.Fatal("expected error for missing policy, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Delete_Success(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	rp := &domain.RenewalPolicy{
+		ID: "rp-default", Name: "Default", RenewalWindowDays: 30,
+		MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{"rp-default": rp}}
+	svc := NewRenewalPolicyService(repo)
+
+	if err := svc.DeleteRenewalPolicy(ctx, "rp-default"); err != nil {
+		t.Fatalf("DeleteRenewalPolicy failed: %v", err)
+	}
+	if _, exists := repo.Policies["rp-default"]; exists {
+		t.Error("expected policy to be removed from repo")
+	}
+}
+
+func TestRenewalPolicyService_Delete_NotFound(t *testing.T) {
+	ctx := context.Background()
+	repo := &mockRenewalPolicyRepo{Policies: map[string]*domain.RenewalPolicy{}}
+	svc := NewRenewalPolicyService(repo)
+
+	err := svc.DeleteRenewalPolicy(ctx, "rp-missing")
+	if err == nil {
+		t.Fatal("expected error for missing policy, got nil")
+	}
+}
+
+func TestRenewalPolicyService_Delete_InUseConflict(t *testing.T) {
+	ctx := context.Background()
+	now := time.Now()
+	rp := &domain.RenewalPolicy{
+		ID: "rp-active", Name: "Active", RenewalWindowDays: 30,
+		MaxRetries: 3, RetryInterval: 3600, AutoRenew: true,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	repo := &mockRenewalPolicyRepo{
+		Policies:  map[string]*domain.RenewalPolicy{"rp-active": rp},
+		DeleteErr: ErrRenewalPolicyInUse,
+	}
+	svc := NewRenewalPolicyService(repo)
+
+	err := svc.DeleteRenewalPolicy(ctx, "rp-active")
+	if err == nil {
+		t.Fatal("expected in-use conflict error, got nil")
+	}
+	if !errors.Is(err, ErrRenewalPolicyInUse) {
+		t.Errorf("expected ErrRenewalPolicyInUse, got %v", err)
+	}
+}

internal/service/testutil_test.go

@@ -749,11 +749,21 @@ func (m *mockPolicyRepo) AddRule(rule *domain.PolicyRule) {
 	m.Rules[rule.ID] = rule
 }
 
-// mockRenewalPolicyRepo is a test implementation of RenewalPolicyRepository
+// mockRenewalPolicyRepo is a test implementation of RenewalPolicyRepository.
+//
+// G-1: repo contract extended with Create/Update/Delete to support the
+// /api/v1/renewal-policies CRUD endpoints. Per-method *Err fields let tests
+// force specific repo failures (duplicate name → 23505, FK RESTRICT on Delete
+// → 23503) without standing up a real Postgres connection. The sentinel
+// errors `ErrRenewalPolicyDuplicateName` and `ErrRenewalPolicyInUse` are the
+// typed envelopes the service / handler layers translate into 409 Conflict.
 type mockRenewalPolicyRepo struct {
-	Policies map[string]*domain.RenewalPolicy
-	GetErr   error
-	ListErr  error
+	Policies  map[string]*domain.RenewalPolicy
+	GetErr    error
+	ListErr   error
+	CreateErr error
+	UpdateErr error
+	DeleteErr error
 }
 
 func (m *mockRenewalPolicyRepo) Get(ctx context.Context, id string) (*domain.RenewalPolicy, error) {
@@ -775,9 +785,49 @@ func (m *mockRenewalPolicyRepo) List(ctx context.Context) ([]*domain.RenewalPoli
 	for _, p := range m.Policies {
 		policies = append(policies, p)
 	}
+	// Deterministic ordering mirrors the production repo's ORDER BY name,
+	// so pagination-boundary assertions don't become flaky under map
+	// iteration randomness.
+	sort.Slice(policies, func(i, j int) bool {
+		return policies[i].Name < policies[j].Name
+	})
 	return policies, nil
 }
 
+func (m *mockRenewalPolicyRepo) Create(ctx context.Context, policy *domain.RenewalPolicy) error {
+	if m.CreateErr != nil {
+		return m.CreateErr
+	}
+	if _, exists := m.Policies[policy.ID]; exists {
+		return m.CreateErr
+	}
+	m.Policies[policy.ID] = policy
+	return nil
+}
+
+func (m *mockRenewalPolicyRepo) Update(ctx context.Context, id string, policy *domain.RenewalPolicy) error {
+	if m.UpdateErr != nil {
+		return m.UpdateErr
+	}
+	if _, exists := m.Policies[id]; !exists {
+		return errNotFound
+	}
+	policy.ID = id
+	m.Policies[id] = policy
+	return nil
+}
+
+func (m *mockRenewalPolicyRepo) Delete(ctx context.Context, id string) error {
+	if m.DeleteErr != nil {
+		return m.DeleteErr
+	}
+	if _, exists := m.Policies[id]; !exists {
+		return errNotFound
+	}
+	delete(m.Policies, id)
+	return nil
+}
+
 func (m *mockRenewalPolicyRepo) AddPolicy(policy *domain.RenewalPolicy) {
 	m.Policies[policy.ID] = policy
 }