Files
rdbms-playground/docs/handoff
claude@clouddev1 a2fc3c9e57 docs: 4f plan + session handoff 39
- docs/plans/20260525-adr-0035-sql-ddl-4f.md — ALTER TABLE ALTER COLUMN
  TYPE plan (/runda'd; forks resolved). Advanced lossy = ForceConversion
  (reuse do_change_column_type; existing transformed_lossy note); the
  internal-__rdbms_* guard folds into do_change_column_type both surfaces
  (user-confirmed); int->serial is ALLOWED (ADR-0018 §8), only non-int
  ->serial / blob / date<->datetime are static-refused.
- docs/handoff/20260525-handoff-39.md — 4d/4e shipped; 4f is next
  (plan ready).
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