1 files changed, 36 insertions, 0 deletions
diff --git a/internal/lsp/chat_prompt_test.go b/internal/lsp/chat_prompt_test.go
new file mode 100644
index 0000000..f0f5446
--- /dev/null
+++ b/internal/lsp/chat_prompt_test.go
@@ -0,0 +1,36 @@
+package lsp
+
+import (
+    "bytes"
+    "testing"
+    "time"
+)
+
+func TestDetectAndHandleChat_UsesConfiguredSystemPrompt(t *testing.T) {
+    s := newTestServer()
+    cap := &captureLLM{}
+    s.llmClient = cap
+    s.promptChatSystem = "CHAT-SYS"
+    uri := "file:///chat.txt"
+    // Avoid nil writer in applyChatEdits
+    var out bytes.Buffer
+    s.out = &out
+    // Line that should trigger chat: ends with '>' and previous char in prefixes
+    s.setDocument(uri, "help?>\n")
+    s.detectAndHandleChat(uri)
+    // Wait briefly for async goroutine to call Chat
+    for i := 0; i < 20 && len(cap.msgs) == 0; i++ {
+        time.Sleep(10 * time.Millisecond)
+    }
+    if len(cap.msgs) == 0 {
+        t.Fatalf("expected Chat to be called")
+    }
+    if cap.msgs[0].Role != "system" || cap.msgs[0].Content != "CHAT-SYS" {
+        t.Fatalf("unexpected system msg: %+v", cap.msgs[0])
+    }
+    // Last should be user with prompt without trailing '>'
+    last := cap.msgs[len(cap.msgs)-1]
+    if last.Role != "user" || last.Content != "help?" {
+        t.Fatalf("unexpected last user msg: %+v", last)
+    }
+}