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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")
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