The pql integration tests (test/pql/client_test.dart) and pql.* daemon
handler tests (test/daemon/pql_commands_test.dart) each spawn a real
`pql` process against the shared on-disk .pql/pql.db. In the parallel
test pool, concurrent invocations contend for the SQLite lock and flake
with PqlException(69) (db busy) — surfaced reliably by the pql 1.10
record_id migration. They pass one-at-a-time, so isolation is the fix.
Tag both files @Tags(['serial']) and add a --concurrency=1 serial pass
to ci/test_core.sh (pty + serial together), mirroring ci/test.sh's
existing serial handling. The error-path companion uses a fake binary,
so it stays parallel.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
ceaa8392d7