chore(repo): replace app symlink/submodule with in-repo app directory; enable committing app/Dockerfile and tooling\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/migration_pipeline/quality_gate.py

@@ -0,0 +1,56 @@
+"""Quality gate evaluation.
+
+Gates (in order):
+  1. Build green  – cmake --build succeeds with zero errors
+  2. Existing tests green  – full CTest suite passes
+  3. New tests green  – only the newly generated tests pass
+
+Warnings are always collected and stored for reporting, but they are
+advisory only (do NOT block) unless config.WARNINGS_ARE_BLOCKING=True.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+from migration_pipeline.build_runner import cmake_build, parse_warnings, run_ctest
+from migration_pipeline.models import QualityGateResult
+
+
+async def evaluate_gates(
+    build_dir: Path,
+    test_prefix: str | None = None,
+) -> QualityGateResult:
+    """Run all quality gates and return an aggregated result.
+
+    *test_prefix* is the CTest regex for newly generated tests.
+    If None, the new-tests gate is skipped (considered passing).
+    """
+    gate = QualityGateResult()
+
+    # --- Gate 1: Build ------------------------------------------------------
+    build_ok, build_out, build_err = await cmake_build(build_dir)
+    gate.build_ok = build_ok
+    gate.build_errors = build_err
+    gate.build_warnings = parse_warnings(build_out + "\n" + build_err)
+
+    if not build_ok:
+        # Short-circuit: remaining gates cannot run without a successful build.
+        return gate
+
+    # --- Gate 2: Existing tests ---------------------------------------------
+    existing_ok, ctest_out, ctest_err = await run_ctest(build_dir)
+    gate.existing_tests_ok = existing_ok
+    gate.test_output = ctest_out + "\n" + ctest_err
+    gate.test_warnings = parse_warnings(ctest_err)
+
+    # --- Gate 3: New tests only ---------------------------------------------
+    if test_prefix:
+        new_ok, new_out, new_err = await run_ctest(build_dir, test_prefix)
+        gate.new_tests_ok = new_ok
+        gate.test_output += f"\n--- New tests ({test_prefix}) ---\n{new_out}{new_err}"
+        gate.test_warnings += parse_warnings(new_err)
+    else:
+        gate.new_tests_ok = True   # no new test → gate vacuously true
+
+    return gate