From https://github.com/can1357/llm-git/pull/40

Keep pipe-mode stdout to the commit message only: the LLM spend line and the
smart-truncation notice are status output, so they go to stderr when stdout is
not a terminal.

diff --git a/lgit/cli.py b/lgit/cli.py
--- a/lgit/cli.py
+++ b/lgit/cli.py
@@ -383,7 +383,7 @@ def _print_llm_spend() -> None:
         line = f"LLM cost: ${spend.cost_usd:.4f} ({tokens})"
         if spend.saved_usd > 0:
             line += f", saved ${spend.saved_usd:.4f} via cache"
-    print(style.dim(line))
+    style.status(style.dim(line))
 
 
 def _compact_count(count: int) -> str:
@@ -585,7 +585,7 @@ async def _generate_standard_workflow(
         if use_map_reduce:
             analysis_diff = diff
         elif len(diff) > int(config.max_diff_length):
-            print(style.warning(f"Applying smart truncation (diff size: {len(diff)} characters)"))
+            style.status(style.warning(f"Applying smart truncation (diff size: {len(diff)} characters)"))
             analysis_diff = smart_truncate_diff(diff, int(config.max_diff_length), config, token_counter)
         else:
             analysis_diff = diff
diff --git a/tests/test_cli.py b/tests/test_cli.py
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -97,6 +97,28 @@ def test_emit_commit_hash_only_prints_to_stdout_when_piped(
     assert capsys.readouterr().out == ""
 
 
+def test_dry_run_pipe_stdout_carries_only_the_commit_message(
+    capsys: pytest.CaptureFixture[str], monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Pipe-mode stdout must be the commit message only; LLM spend goes to stderr."""
+    from lgit import pricing, style
+    from lgit.models import ConventionalCommit
+
+    monkeypatch.setattr(style, "_PIPE_MODE", True)
+    pricing.reset_session()
+    pricing.record_usage("claude-haiku-4-5", pricing.TokenUsage(input_tokens=100, output_tokens=20))
+
+    message = ConventionalCommit.from_raw(
+        commit_type="feat", scope="sandbox", summary="added mock feature", body=["Added a sample feature."]
+    )
+    cli._print_message(message, title="Generated Commit Message")
+    cli._print_llm_spend()
+
+    captured = capsys.readouterr()
+    assert captured.out == message.format_commit_message()
+    assert "LLM cost" in captured.err
+
+
 def test_trace_output_flag_enables_file_profiling() -> None:
     args = _args("--trace-output", "profile.jsonl", "--dry-run")