Defame1297 52bbd62286 test: stop the runners reporting green on suites that never ran ...

run_bats() was an if with no else, so a missing or non-executable run-bats.sh
made all 166 bats tests disappear with no diagnostic while the run printed a
green summary and exited 0. --bats-only became a total no-op. This is the same
defect the PR fixed one level down, left open in the dispatcher that pre-push
actually invokes -- and nothing tested run-tests.sh at all.

run-bats.sh's aggregation was asserted by nothing. Three separate mutations to
its failure-detection line all survived the existing suite, because real bats
emits both a nonzero exit and "not ok" lines, so each signal masked the other.
The new cases produce each signal without the other; all three mutants now die.

Also in this pass:
- zero discovered .bats files exited 0, so a widened path exclusion retired the
  suite silently. Replaced with a file-count floor: a collapse to one or two
  files is the same failure as a collapse to zero
- an existing-but-empty status file counted as a pass, because [[ "" -eq 0 ]]
  is arithmetic-true and the || echo 1 fallback only covered a missing file.
  The repro is deterministic: the stub truncates its own status file, then
  kill -9s its parent so the real exit-code write never happens

Adds tests/test-run-tests.sh, 9 cases pinning the exit 0 / 1 / 77 three-way
split against a single summary line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X7GvKuJfy2WrdBmUttV4DT

2026-08-14 11:04:22 +00:00

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