#10244 feat(core): Error on missing explicit stream selections Pull request opened by isjiajia01 Description Raise

PluginExecutionError

when a full-stream selection rule names a literal stream that is absent from the discovered catalog. Stream-only rules retain their established equivalence to

stream.*

. Exact property selections remain warning-only, while wildcard/glob and negated stream patterns remain non-fatal. Custom catalogs and runtime

select_filter

rules are unchanged. The discovered catalog is preserved when validation fails. Added focused regression coverage for both fatal forms and representative property, glob, and negated non-fatal cases. Validation completed: •

uv run --frozen python -m pytest tests/meltano/core/plugin/singer/test_tap.py tests/meltano/core/plugin/singer/test_catalog.py -q

(

107 passed, 1 xfailed

) •

nox -t lint

• Independent read-only review: APPROVE, no correctness blockers • Final diff reviewed by the author Checklist • I have read the contribution guide Was generative AI tooling used to co-author this PR? • Yes (Codex) Generated-by: Codex following the agentic coding guidelines Related Issues • Closes #6147 Summary by Sourcery Enforce validation of explicit stream selection rules against the discovered Singer catalog and raise a plugin execution error when a required stream is missing. New Features: • Add validation that full-stream selection rules referencing literal stream names must match streams present in the discovered Singer catalog. Enhancements: • Refactor select metadata rule construction to reuse parsed selection patterns in both catalog utilities and Singer tap catalog rule application. Tests: • Add regression tests covering fatal errors for missing explicit streams and non-fatal behavior for property, wildcard, and negated selection patterns. meltano/meltano