feat(search): Switch filter operator from contains to is on dropdown selection

static/app/components/searchQueryBuilder/hooks/useQueryBuilderState.tsx

@@ -185,6 +185,7 @@ type UpdateTokenValueAction = {
   token: TokenResult<Token.FILTER>;
   type: 'UPDATE_TOKEN_VALUE';
   value: string;
+  op?: TermOperator;
 };
 
 type MultiSelectFilterValueAction = {
@@ -605,7 +606,8 @@ function replaceTokensWithText(
 export function modifyFilterValue(
   query: string,
   token: TokenResult<Token.FILTER>,
-  newValue: string
+  newValue: string,
+  newOp?: TermOperator
 ): string {
   if (isDateToken(token)) {
     return modifyFilterValueDate(query, token, newValue);
@@ -614,7 +616,35 @@ export function modifyFilterValue(
   // stop the user from entering multiple wildcards by themselves
   newValue = newValue.replace(/\*\*+/g, '*');
 
-  return replaceQueryToken(query, token.value, newValue);
+  // No operator change — just replace the value (existing behavior)
+  if (newOp === undefined) {
+    return replaceQueryToken(query, token.value, newValue);
+  }
+
+  // Operator change — replace the entire filter token atomically
+  const negated =
+    newOp === TermOperator.NOT_EQUAL ||
+    newOp === TermOperator.DOES_NOT_CONTAIN ||
+    newOp === TermOperator.DOES_NOT_START_WITH ||
+    newOp === TermOperator.DOES_NOT_END_WITH;
+
+  let internalOp: TermOperator;
+  if (newOp === TermOperator.DOES_NOT_CONTAIN) {
+    internalOp = TermOperator.CONTAINS;
+  } else if (newOp === TermOperator.DOES_NOT_START_WITH) {
+    internalOp = TermOperator.STARTS_WITH;
+  } else if (newOp === TermOperator.DOES_NOT_END_WITH) {
+    internalOp = TermOperator.ENDS_WITH;
+  } else if (newOp === TermOperator.NOT_EQUAL) {
+    internalOp = TermOperator.DEFAULT;
+  } else {
+    internalOp = newOp;
+  }
+
+  const prefix = negated ? '!' : '';
+  const keyStr = stringifyToken(token.key);
+  const replacement = `${prefix}${keyStr}:${internalOp}${newValue}`;
+  return replaceQueryToken(query, token, replacement);
 }
 
 function updateFilterMultipleValues(
@@ -1049,7 +1079,7 @@ export function useQueryBuilderState({
         case 'UPDATE_TOKEN_VALUE':
           return {
             ...state,
-            query: modifyFilterValue(state.query, action.token, action.value),
+            query: modifyFilterValue(state.query, action.token, action.value, action.op),
           };
         case 'UPDATE_LOGIC_OPERATOR':
           return updateLogicOperator(state, action);

static/app/components/searchQueryBuilder/index.spec.tsx

@@ -1089,21 +1089,43 @@ describe('SearchQueryBuilder', () => {
 
       await userEvent.click(await screen.findByRole('option', {name: 'Firefox'}));
 
-      // New token should have a value
+      // New token should have a value, and selecting from dropdown switches operator to "is"
       expect(
         screen.getByRole('row', {
-          name: `browser.name:${WildcardOperators.CONTAINS}Firefox`,
+          name: 'browser.name:Firefox',
         })
       ).toBeInTheDocument();
 
       // Now we call onChange
       expect(mockOnChange).toHaveBeenCalledTimes(1);
       expect(mockOnChange).toHaveBeenCalledWith(
-        `browser.name:${WildcardOperators.CONTAINS}Firefox`,
+        'browser.name:Firefox',
         expect.anything()
       );
     });
 
+    it('does not switch operator to "is" when filter already has a value', async () => {
+      render(
+        <SearchQueryBuilder
+          {...defaultProps}
+          initialQuery={`browser.name:${WildcardOperators.CONTAINS}firefox`}
+        />,
+        {organization: {features: ['search-query-builder-input-flow-changes']}}
+      );
+
+      await userEvent.click(
+        screen.getByRole('button', {name: 'Edit value for filter: browser.name'})
+      );
+      await userEvent.click(await screen.findByRole('option', {name: 'Chrome'}));
+
+      // Operator should remain "contains" since there was already a value
+      expect(
+        await screen.findByRole('row', {
+          name: `browser.name:${WildcardOperators.CONTAINS}[firefox,Chrome]`,
+        })
+      ).toBeInTheDocument();
+    });
+
     it('can add free text by typing', async () => {
       const mockOnSearch = jest.fn();
       render(<SearchQueryBuilder {...defaultProps} onSearch={mockOnSearch} />);
@@ -1266,9 +1288,10 @@ describe('SearchQueryBuilder', () => {
       await userEvent.keyboard('{enter}');
       await userEvent.click(screen.getByRole('option', {name: '[Filtered]'}));
 
+      // Selecting from dropdown switches operator from contains to "is"
       expect(
         await screen.findByRole('row', {
-          name: `message:${WildcardOperators.CONTAINS}"[Filtered]"`,
+          name: 'message:"[Filtered]"',
         })
       ).toBeInTheDocument();
     });

static/app/components/searchQueryBuilder/tokens/filter/valueCombobox.tsx

@@ -749,7 +749,7 @@
   );
 
   const updateFilterValue = useCallback(
-    (value: string) => {
+    (value: string, op?: TermOperator) => {
       if (token.filter === FilterType.HAS) {
         const suggested = getSuggestedFilterKey(value);
         if (suggested) {
@@ -793,6 +793,7 @@
             type: 'UPDATE_TOKEN_VALUE',
             token,
             value: newValue,
+            op,
           });
 
           if (newValue && newValue !== '""' && !ctrlKeyPressed) {
@@ -809,6 +810,7 @@
             getFilterValueType(token, fieldDefinition),
             replaceCommaSeparatedValue(inputValue, selectionIndex, escapeTagValue(value))
           ),
+          op,
         });
 
         if (!ctrlKeyPressed) {
@@ -819,6 +821,7 @@
           type: 'UPDATE_TOKEN_VALUE',
           token,
           value: cleanedValue,
+          op,
         });
         onCommit();
       }
@@ -860,7 +863,13 @@
         return;
       }
 
-      updateFilterValue(value);
+      // When selecting from dropdown with no existing value, switch from "contains" to "is"
+      let newOp: TermOperator | undefined;
+      if (token.operator === TermOperator.CONTAINS && !token.value.value) {
+        newOp = token.negated ? TermOperator.NOT_EQUAL : TermOperator.DEFAULT;
+      }
+
+      updateFilterValue(value, newOp);
       trackAnalytics('search.value_autocompleted', {
         ...analyticsData,
         filter_value: value,