Release checklist

What to settle before the first tag, then the work that follows in a later, data-heavy release.

Before the first release — settle the record flag and API contract

--format vocabulary — confirm text, json, ndjson, csv, sql; the json-as-array vs ndjson-as-lines split; --table (the SQL INSERT target); the --separator rejection on record formats; and the exit codes (misuse 2, runtime 1).
Library surface — confirm Record, FakeRecord, NewRecordTemplate, RecordTemplate, Column/Columns(), and the JSON(), CSVHeader(), CSVLine(), SQLInsert() serializers.
Typed scalars — columns are strings today ("42", quoted SQL). Confirm that stays out of scope, or add a per-column kind before the tag.
Struct-filling — fake:"..." tags (reflection over an arbitrary struct) stay out of scope; Columns() hands the caller the values to map themselves. Confirm.
Independent reference draw — within one record every tailed reference to a category is one draw, with no spelling for "these columns should disagree". Confirm the per-record contract, or add the spelling.

Shipped-data de-duplication — email.json's local is a drifted copy of username.json; fold it in when the shipped set grows and we add lots more data.