Add a NOT IN operator for KeywordList search attributes

[rossedfort]

Description & motivation 💭

KeywordList search attributes (BuildIds, TemporalChangeVersion, and any custom one) could be filtered with in, =, !=, is null and is not null, but there was no way to express "this list contains none of these values". != is not a substitute — it compares a single value, so excluding three build IDs meant three separate chips.

Every layer below the UI already handled not in:

• 'not in' is in the conditionals grammar list in src/lib/utilities/is.ts, and isInConditional matches it.
• tokenize.ts has a six-character lookahead written specifically to lex it, already covered by a test.
• formatValue in filter-workflow-query.ts passes the parenthesized literal through unquoted for any in-style conditional.
• The generic branch of toListWorkflowFilters stores the whole ("a", "b") token as the value and captures not in as the conditional.

So the fix is one entry in listConditionalOptions. The chip's value editor already picks ChipInput vs. a plain input via isInConditional, and applyChanges already re-serializes chips to ("a", "b") for it.

The query serializes unspaced, matching how in is emitted today: `BuildIds`not in("a", "b").

Confirmed server-side support before building this: in common/persistence/visibility/store/query/converter.go, supportedKeywordListOperators is exactly EqualStr, NotEqualStr, InStr, NotInStr. (The List Filter docs page doesn't mention NOT IN, but the converter accepts it.)

Scoped to KeywordList only. Keyword attributes support NOT IN server-side too, but they have no In option in the UI today, so adding Not In there alone would be inconsistent.

The hardcoded English 'In' label moved to a translation key alongside the new 'Not In', so the pair stays consistent.

Testing 🧪

How was this tested 👻

• Manual testing
• E2E tests added
• Unit tests added

Unit: not in serialization (alone and AND-joined) in filter-workflow-query.test.ts; parsing `CustomKeywordListField`not in("Hello", "World") back into a filter (alone and joined) in to-list-workflow-filters.test.ts.

E2E: a KeywordList search attributes block registering a KeywordList custom attribute, covering the Not In flow, the unchanged In flow, and a round trip through the raw query box.

Full unit suite and the integration suite pass; cold svelte-check reports 0 errors; lint:ci is clean.

Manual testing has not been done — nothing here has exercised a real NOT IN query against Elasticsearch. Worth a pass before merge.

Steps for others to test: 🚶🏽‍♂️🚶🏽‍♀️

1. Run the UI against a server with a KeywordList search attribute populated (BuildIds or TemporalChangeVersion).
2. On the workflows list, Add Filter → pick the KeywordList attribute.
3. Choose Not In, enter two values, Apply.
4. The URL should read `BuildIds`not in("a", "b") and the results should exclude matching workflows.
5. Reload — the chip should rebuild with Not In still selected.
6. Toggle the raw query box — it should show the same string and re-accept it.

Issue(s) closed

FE-613

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
holocene	Ready	Preview	Sep 29, 2026 7:51pm UTC

[andrewzamojc]

LGTM.

[andrewzamojc]

I guess this is already working and you're just adding it to the FE? All the other files are tests.