From ef44e7ada2498b5fdbc1ffa8dc152482c8dcf5fc Mon Sep 17 00:00:00 2001
From: Virgil <virgil@lethean.io>
Date: Wed, 1 Apr 2026 05:37:02 +0000
Subject: [PATCH] Add milestone edit and delete APIs

Co-Authored-By: Virgil <virgil@lethean.io>
---
 milestones.go      | 16 ++++++++++++++
 milestones_test.go | 53 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)

diff --git a/milestones.go b/milestones.go
index 84c3365..d46ea3e 100644
--- a/milestones.go
+++ b/milestones.go
@@ -45,3 +45,19 @@ func (s *MilestoneService) Create(ctx context.Context, owner, repo string, opts
 	}
 	return &out, nil
 }
+
+// Edit updates an existing milestone.
+func (s *MilestoneService) Edit(ctx context.Context, owner, repo string, id int64, opts *types.EditMilestoneOption) (*types.Milestone, error) {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/milestones/{id}", pathParams("owner", owner, "repo", repo, "id", int64String(id)))
+	var out types.Milestone
+	if err := s.client.Patch(ctx, path, opts, &out); err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// Delete removes a milestone.
+func (s *MilestoneService) Delete(ctx context.Context, owner, repo string, id int64) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/milestones/{id}", pathParams("owner", owner, "repo", repo, "id", int64String(id)))
+	return s.client.Delete(ctx, path)
+}
diff --git a/milestones_test.go b/milestones_test.go
index f5e5a21..04f0b9e 100644
--- a/milestones_test.go
+++ b/milestones_test.go
@@ -97,3 +97,56 @@ func TestMilestoneService_Create_Good(t *testing.T) {
 		t.Errorf("got title=%q, want %q", milestone.Title, "v1.0")
 	}
 }
+
+func TestMilestoneService_Edit_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPatch {
+			t.Errorf("expected PATCH, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/repos/core/go-forge/milestones/3" {
+			t.Errorf("wrong path: %s", r.URL.Path)
+		}
+		var opts types.EditMilestoneOption
+		if err := json.NewDecoder(r.Body).Decode(&opts); err != nil {
+			t.Fatal(err)
+		}
+		if opts.Title != "v1.1" {
+			t.Errorf("got title=%q, want %q", opts.Title, "v1.1")
+		}
+
+		json.NewEncoder(w).Encode(types.Milestone{ID: 3, Title: opts.Title})
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	milestone, err := f.Milestones.Edit(context.Background(), "core", "go-forge", 3, &types.EditMilestoneOption{
+		Title: "v1.1",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if milestone.ID != 3 {
+		t.Errorf("got id=%d, want 3", milestone.ID)
+	}
+	if milestone.Title != "v1.1" {
+		t.Errorf("got title=%q, want %q", milestone.Title, "v1.1")
+	}
+}
+
+func TestMilestoneService_Delete_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Errorf("expected DELETE, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/repos/core/go-forge/milestones/3" {
+			t.Errorf("wrong path: %s", r.URL.Path)
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Milestones.Delete(context.Background(), "core", "go-forge", 3); err != nil {
+		t.Fatal(err)
+	}
+}