From 221c5fa94f1693904f2c19f207540c1f3746c392 Mon Sep 17 00:00:00 2001
From: Virgil <virgil@lethean.io>
Date: Wed, 1 Apr 2026 22:18:01 +0000
Subject: [PATCH] Add repo topic add/delete helpers

Co-Authored-By: Virgil <virgil@lethean.io>
---
 repos.go      | 12 ++++++++++++
 repos_test.go | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/repos.go b/repos.go
index ba3a711..5c08fe1 100644
--- a/repos.go
+++ b/repos.go
@@ -105,6 +105,18 @@ func (s *RepoService) UpdateTopics(ctx context.Context, owner, repo string, topi
 	return s.client.Put(ctx, path, types.RepoTopicOptions{Topics: topics}, nil)
 }
 
+// AddTopic adds a topic to a repository.
+func (s *RepoService) AddTopic(ctx context.Context, owner, repo, topic string) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/topics/{topic}", pathParams("owner", owner, "repo", repo, "topic", topic))
+	return s.client.Put(ctx, path, nil, nil)
+}
+
+// DeleteTopic removes a topic from a repository.
+func (s *RepoService) DeleteTopic(ctx context.Context, owner, repo, topic string) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/topics/{topic}", pathParams("owner", owner, "repo", repo, "topic", topic))
+	return s.client.Delete(ctx, path)
+}
+
 // GetNewPinAllowed returns whether new issue pins are allowed for a repository.
 func (s *RepoService) GetNewPinAllowed(ctx context.Context, owner, repo string) (*types.NewIssuePinsAllowed, error) {
 	path := ResolvePath("/api/v1/repos/{owner}/{repo}/new_pin_allowed", pathParams("owner", owner, "repo", repo))
diff --git a/repos_test.go b/repos_test.go
index da73252..d8bd358 100644
--- a/repos_test.go
+++ b/repos_test.go
@@ -64,6 +64,46 @@ func TestRepoService_UpdateTopics_Good(t *testing.T) {
 	}
 }
 
+func TestRepoService_AddTopic_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPut {
+			t.Errorf("expected PUT, got %s", r.Method)
+		}
+		if r.URL.EscapedPath() != "/api/v1/repos/core/go-forge/topics/release%20candidate" {
+			t.Errorf("wrong path: %s", r.URL.EscapedPath())
+			http.NotFound(w, r)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Repos.AddTopic(context.Background(), "core", "go-forge", "release candidate"); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestRepoService_DeleteTopic_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.EscapedPath() != "/api/v1/repos/core/go-forge/topics/release%20candidate" {
+			t.Errorf("wrong path: %s", r.URL.EscapedPath())
+			http.NotFound(w, r)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Repos.DeleteTopic(context.Background(), "core", "go-forge", "release candidate"); err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestRepoService_GetNewPinAllowed_Good(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {