cli/sync(fix[sync]) Emit summary when all sync patterns are unmatched

why: When every pattern is unmatched (total_repos == 0, unmatched_count > 0),
the early return skipped summary emission. JSON/NDJSON consumers got no
machine-readable output; humans saw no summary line.
what:
- Emit summary event and human-readable summary before early return
- Add test for all-patterns-unmatched scenario

Author: tony

src/vcspull/cli/sync.py

@@ -697,7 +697,26 @@ def sync(
         return
 
     if total_repos == 0:
-        formatter.emit_text(colors.warning("No repositories matched the criteria."))
+        if unmatched_count > 0:
+            summary = {
+                "total": unmatched_count,
+                "synced": 0,
+                "previewed": 0,
+                "failed": unmatched_count,
+            }
+            formatter.emit({"reason": "summary", **summary})
+            if formatter.mode == OutputMode.HUMAN:
+                formatter.emit_text(
+                    f"\n{colors.info('Summary:')} "
+                    f"{summary['total']} repos, "
+                    f"{colors.success(str(summary['synced']))} synced, "
+                    f"{colors.warning(str(summary['previewed']))} previewed, "
+                    f"{colors.error(str(summary['failed']))} failed",
+                )
+        else:
+            formatter.emit_text(
+                colors.warning("No repositories matched the criteria."),
+            )
         formatter.finalize()
         return
 

tests/test_cli.py

@@ -2052,6 +2052,52 @@ def test_sync_unmatched_pattern_counts_in_summary(
     assert "1 synced" in output
 
 
+def test_sync_all_patterns_unmatched_emits_summary(
+    tmp_path: pathlib.Path,
+    capsys: pytest.CaptureFixture[str],
+    caplog: pytest.LogCaptureFixture,
+    monkeypatch: pytest.MonkeyPatch,
+    user_path: pathlib.Path,
+    config_path: pathlib.Path,
+    git_repo: GitSync,
+) -> None:
+    """Summary should be emitted even when ALL patterns are unmatched.
+
+    When every pattern fails to match a repo (``total_repos == 0``), the early
+    return must still emit a summary event with the correct failure count so
+    both human-readable and machine-readable consumers see a summary.
+    """
+    config = {
+        "~/github_projects/": {
+            "my_git_project": {
+                "url": f"git+file://{git_repo.path}",
+                "remotes": {"test_remote": f"git+file://{git_repo.path}"},
+            },
+        },
+    }
+    yaml_config = config_path / ".vcspull.yaml"
+    yaml_config.write_text(
+        yaml.dump(config, default_flow_style=False), encoding="utf-8"
+    )
+
+    monkeypatch.chdir(tmp_path)
+    caplog.set_level(logging.INFO)
+
+    with contextlib.suppress(SystemExit):
+        cli(["sync", "not_in_config1", "not_in_config2"])
+
+    captured = capsys.readouterr()
+    output = "".join([*caplog.messages, captured.out, captured.err])
+
+    # Both unmatched patterns should appear in the output
+    assert "not_in_config1" in output
+    assert "not_in_config2" in output
+
+    # Summary should reflect both unmatched patterns as failures
+    assert "2 failed" in output
+    assert "0 synced" in output
+
+
 def test_sync_unmatched_pattern_no_duplicate_log(
     tmp_path: pathlib.Path,
     capsys: pytest.CaptureFixture[str],