A saved list is one of two things, and the difference explains most confusion on the Lists page.
Filter-based lists
A filter list stores your filter set, not rows. Re-open it and it reflects the market as it is now: companies that entered the segment appear, people who moved on drop out. This is what you want for a segment you work repeatedly, for example 'DACH CFOs 200+'.
Because there are no stored rows, there is nothing to delete out of it:
Filter-based lists have no removable records
To shrink a filter list, tighten the filters. To carve out specific companies, use the exclusion options in search rather than deleting from the list.
Selected-record lists
A record list stores exactly the rows you picked. It is a snapshot: stable, auditable, and the right shape for 'the 300 accounts we agreed to work this quarter'. Rows can be added and removed individually.
Selected-record lists require record_ids
Through the API, a record list needs the ids of the rows it should contain. Creating one without them fails rather than silently creating an empty list.
Choosing between them
- Recurring campaign into a market - filter list. Fresh every time you export.
- An agreed account list - record list. Identical every time you open it.
- Suppression - record list, then exclude it from future searches so you never re-export the same people.
Both types are visible to your AI agent and both can be exported, tagged, and re-run on a schedule.