Summary

• Fixes [POST-RERUN] #880 residual: joined row aggregation bucket #1413 IC3/cross-country carried-row reentry shape: WITH person, collect(city) AS cities MATCH ...
• Admits multiple post-reentry WITH stages for the single-reentry IC3 suffix
• Carries collected node-entity lists through whole-row reentry and evaluates NOT friendCity IN cities
• Keeps direct optional-match RETURN n, collect(x) in the validation-failure bucket until optional null filtering is supported
• Adds adversarial regressions for collect(city), collect(DISTINCT city), CASE aggregation, post-aggregate filtering, TCK optional aggregate boundary, and cuDF reentry smoke

Validation

• PYTHONPATH=/tmp/pygraphistry-issue-1413-deps python3 -m pytest -q graphistry/tests/compute/gfql/cypher/test_lowering.py -k 'issue_1413_ic3 or optional_match_collect_null_whole_row_return_boundary or optional_match_collect_alias_property or optional_match_collect_case_relationship_rows or failfast_relationship_whole_row_grouped_count_star_boundary' -> 6 passed
• PYTHONPATH=/tmp/pygraphistry-issue-1413-deps python3 -m pytest -q graphistry/tests/compute/gfql/cypher/test_lowering.py -k '(issue_1413 or multi_alias_with_distinct_scalar_projection or graph_backed_unwind_after_with or post_with_match_collect_unwind_match or multi_stage_with_match_reentry or aggregate_whole_row or collect_alias_property or optional_match_collect_null_whole_row_return_boundary) and not cudf' -> 23 passed
• PYTHONPATH=/tmp/pygraphistry-issue-1413-deps python3 -m pytest -q graphistry/tests/compute/gfql/cypher/test_lowering.py -k 'not cudf' -> 896 passed, 12 skipped
• PYTHONPATH=/home/lmeyerov/Work/pygraphistry2:/tmp/tck-gfql-f02d17c:/tmp/pygraphistry-issue-1413-deps python3 -m pytest -q tests/cypher_tck/test_tck_runner.py::test_direct_cypher_xfail_contract --tb=short -> 783 passed
• python3 -m ruff check ... -> passed
• PYTHONPATH=/tmp/pygraphistry-issue-1413-deps python3 -m py_compile ... -> passed
• PYTHONPATH=/tmp/pygraphistry-issue-1413-deps python3 bin/ci_cypher_surface_guard.py -> passed
• git diff --check -> passed
• DGX Spark RAPIDS matrix: MATRIX_CELLS="25.02:gfql 26.02:gfql" WITH_IMAGE_BUILD=0 WITH_GPU=1 WITH_LINT=0 WITH_TYPECHECK=0 WITH_TEST=1 PROFILE=gfql TEST_FILES="..." ./test-rapids-official-matrix.sh -> 25.02/gfql PASS, 26.02/gfql PASS
• GitHub PR checks on f111dac4 -> green, including duplicated tck-gfql

Notes

• Surface guard baseline line-count update is intentional for this compiler slice; dataclass/API surface counts are unchanged.