diff --git a/testing/ci/publish_metrics.py b/testing/ci/publish_metrics.py
index c59dc3c..d816db6 100644
--- a/testing/ci/publish_metrics.py
+++ b/testing/ci/publish_metrics.py
@@ -20,6 +20,8 @@ def _build_parser() -> argparse.ArgumentParser:
     parser.add_argument("--status", choices=("ok", "failed"), required=True, help="Gate outcome")
     parser.add_argument("--junit", nargs="*", default=(), help="JUnit XML files to aggregate")
     parser.add_argument("--quality-report", default="build/quality-gate.json", help="Quality gate JSON report")
+    parser.add_argument("--branch", default=os.getenv("BRANCH_NAME", os.getenv("GIT_BRANCH", "")), help="SCM branch")
+    parser.add_argument("--build-number", default=os.getenv("BUILD_NUMBER", ""), help="Jenkins build number")
     return parser
 
 
@@ -104,6 +106,8 @@ def main(argv: list[str] | None = None) -> int:
         summary=summary,
         workspace_line_coverage_percent=coverage_percent,
         source_lines_over_500=source_lines_over_500,
+        branch=args.branch,
+        build_number=args.build_number,
         checks=checks,
         test_cases=test_cases,
     )
diff --git a/testing/ci/summary.py b/testing/ci/summary.py
index c608fd5..5e4eb14 100644
--- a/testing/ci/summary.py
+++ b/testing/ci/summary.py
@@ -15,6 +15,12 @@ def _escape_label(value: str) -> str:
     return value.replace("\\", "\\\\").replace("\n", "\\n").replace('"', '\\"')
 
 
+def _label_str(labels: dict[str, str]) -> str:
+    """Render Prometheus labels, omitting empty optional values."""
+    parts = [f'{key}="{_escape_label(val)}"' for key, val in labels.items() if val]
+    return "{" + ",".join(parts) + "}" if parts else ""
+
+
 @dataclass(frozen=True)
 class RunSummary:
     """Aggregate counts from a collection of JUnit XML files."""
@@ -102,6 +108,8 @@ def render_payload(
     summary: RunSummary,
     workspace_line_coverage_percent: float = 0.0,
     source_lines_over_500: int = 0,
+    branch: str = "",
+    build_number: str = "",
     checks: dict[str, str] | None = None,
     test_cases: list[tuple[str, str]] | None = None,
 ) -> str:
@@ -119,6 +127,8 @@ def render_payload(
         f'platform_quality_gate_workspace_line_coverage_percent{{suite="{suite}"}} {workspace_line_coverage_percent:.3f}\n'
         "# TYPE platform_quality_gate_source_lines_over_500_total gauge\n"
         f'platform_quality_gate_source_lines_over_500_total{{suite="{suite}"}} {int(source_lines_over_500)}\n'
+        "# TYPE platform_quality_gate_build_info gauge\n"
+        f'platform_quality_gate_build_info{_label_str({"suite": suite, "branch": branch, "build_number": build_number})} 1\n'
     )
     if checks:
         payload += "# TYPE bstein_home_quality_gate_checks_total gauge\n"
@@ -146,6 +156,8 @@ def publish_quality_metrics(
     summary: RunSummary,
     workspace_line_coverage_percent: float = 0.0,
     source_lines_over_500: int = 0,
+    branch: str = "",
+    build_number: str = "",
     checks: dict[str, str] | None = None,
     test_cases: list[tuple[str, str]] | None = None,
 ) -> None:
@@ -166,6 +178,8 @@ def publish_quality_metrics(
         summary=summary,
         workspace_line_coverage_percent=workspace_line_coverage_percent,
         source_lines_over_500=source_lines_over_500,
+        branch=branch,
+        build_number=build_number,
         checks=checks,
         test_cases=test_cases,
     )