Merge pull request #7 from VictorVargas/fix/stream-tool-call-visibility

fix(agent): RunStream never surfaced tool calls to callers

pkg/agent/loop.go

@@ -205,6 +205,19 @@ func (l *Loop) RunStream(ctx context.Context, input string, history ...llm.Messa
 							Content:    result.Content,
 						})
 					}
+
+					// Surface which tools were actually called, and with
+					// what arguments, to the caller — a dedicated chunk,
+					// separate from the content-streaming gate below, since
+					// that gate exists to hide raw provider deltas during a
+					// tool-call round, not to hide the fact that a call
+					// happened at all. Without this, callers (e.g. a UI
+					// wanting to show "used tool X" or track which files a
+					// write/edit touched) have no way to observe tool
+					// calls unless they also happen to be the Approver.
+					if !yield(llm.StreamChunk{ToolCalls: chunk.ToolCalls}, nil) {
+						return
+					}
 				}
 
 				// A trailing usage-only chunk (no Delta/ReasoningDelta, per

pkg/agent/loop_test.go

@@ -669,11 +669,17 @@ func TestRun_Stream_WithToolCalls(t *testing.T) {
 		chunks = append(chunks, chunk)
 	}
 
-	if len(chunks) != 1 {
+	// One chunk surfacing the tool call itself (so callers can observe
-		t.Errorf("expected 1 chunk (only the 'done' chunk), got %d", len(chunks))
+	// which tools ran and with what arguments), then the final "done"
+	// content chunk.
+	if len(chunks) != 2 {
+		t.Fatalf("expected 2 chunks (tool call + 'done'), got %d: %+v", len(chunks), chunks)
 	}
-	if chunks[0].Delta != "done" {
+	if len(chunks[0].ToolCalls) != 1 || chunks[0].ToolCalls[0].Name != "greet" {
-		t.Errorf("expected 'done', got %q", chunks[0].Delta)
+		t.Errorf("expected the first chunk to surface the 'greet' tool call, got %+v", chunks[0].ToolCalls)
+	}
+	if chunks[1].Delta != "done" {
+		t.Errorf("expected 'done', got %q", chunks[1].Delta)
 	}
 }