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Write Modes (reference)

write_mode

ValueDescription
replaceFull rewrite of the sheet
appendAppend/update; see output_options.append_policy
append_dedupAppend with dedup by key (+ incremental ads window)

append_policy (append only)

ValueDescription
soft_refreshAPI last−1…today, refreshes the tail by date
rewrite_from_lastAPI last…today, delete+rewrite from the last date
dumbFull range, physical append

Guide: Write Modes.

Maintained by the LightLead Documentation Team · Last verified: 2026-07-26