diff --git a/docs/plans/atividades-omnibox-presets-busca-impl.md b/docs/plans/atividades-omnibox-presets-busca-impl.md
index 827a1da3..c6344316 100644
--- a/docs/plans/atividades-omnibox-presets-busca-impl.md
+++ b/docs/plans/atividades-omnibox-presets-busca-impl.md
@@ -60,8 +60,7 @@ flowchart LR
 - **Tab + status em Todos:** ao mudar tab, limpar `status` se sair de `todos` (mesmo comportamento do antigo `buildTabHref`).
 - **`q` + tab:** filtros AND — busca restringe dentro da janela ativa.
 
-## Aceite de engenharia
+## Débitos deferidos (simplify B138)
 
-- [x] Aceite de produto da intenção ainda coberto
-- [x] Invariantes AGENTS/engineering-standards
-- [x] Testes de domínio previstos (unit) onde URL/where mudam
+- **DRY municipality/setExclusiveField helpers** (score 3, `defer_trigger`): extrair quando 3º domínio omnibox precisar do mesmo padrão — já ledgerado em B128; não bloqueia B138.
+- **Int test `responsible.name` contains** (score 3, `defer_trigger`): where JSON coberto em unit; int espelhando supporter quando houver fixture de activity com responsável.
diff --git a/src/utilities/activityOmnibox.ts b/src/utilities/activityOmnibox.ts
index 0aa2c203..a7594271 100644
--- a/src/utilities/activityOmnibox.ts
+++ b/src/utilities/activityOmnibox.ts
@@ -8,6 +8,7 @@ import {
   type CampaignListOmniboxChip,
   type CampaignListOmniboxSuggestion,
 } from '@/lib/campaignListOmnibox'
+import { isContactSearchQueryReady, normalizeContactSearchQuery } from '@/lib/contactSearchQuery'
 import { activityKindLabels, activityStatusLabels } from '@/lib/schemas/activity'
 import {
   activityTabLabels,
@@ -197,8 +198,9 @@ export const applyActivityOmniboxSuggestion = ({
   suggestionId: string
 }): ActivityOmniboxAction => {
   if (suggestionId.startsWith('q:')) {
-    const q = suggestionId.slice(2)
-    return { kind: 'url', state: withPageReset({ ...state, q: q || undefined }) }
+    const { trimmed } = normalizeContactSearchQuery(suggestionId.slice(2))
+    const q = isContactSearchQueryReady(trimmed) ? trimmed : undefined
+    return { kind: 'url', state: withPageReset({ ...state, q }) }
   }
 
   if (suggestionId.startsWith('tab:')) {
diff --git a/src/utilities/activityUi.ts b/src/utilities/activityUi.ts
index 490fcd9e..a42236fa 100644
--- a/src/utilities/activityUi.ts
+++ b/src/utilities/activityUi.ts
@@ -1,5 +1,6 @@
 import type { Where } from 'payload'
 
+import { isContactSearchQueryReady, normalizeContactSearchQuery } from '@/lib/contactSearchQuery'
 import { activityKinds, activityStatuses, type ActivityKind } from '@/lib/schemas/activity'
 import {
   buildListHref,
@@ -48,9 +49,15 @@ const isActivityKind = (value: string | undefined): value is ActivityKind =>
 const isActivityStatus = (value: string | undefined): value is ActivityStatus =>
   activityStatuses.includes(value as ActivityStatus)
 
+const isActivityListSearchReady = (raw: string | undefined): string | undefined => {
+  if (!raw) return undefined
+  const { trimmed } = normalizeContactSearchQuery(raw)
+  return isContactSearchQueryReady(trimmed) ? trimmed : undefined
+}
+
 export const parseActivityListParams = (params: RawSearchParams): ActivityListState => {
   const rawPage = strictDecimalInteger(firstValue(params.page))
-  const q = normalizedText(firstValue(params.q))
+  const q = isActivityListSearchReady(normalizedText(firstValue(params.q)))
   const rawTab = firstValue(params.tab)
   const tab = isActivityTab(rawTab) ? rawTab : 'proximos'
   const rawKind = firstValue(params.kind)
@@ -73,9 +80,12 @@ export const buildActivityListWhere = (state: ActivityListState, now: Date): Whe
   const filters: Where[] = []
 
   if (state.q) {
-    filters.push({
-      or: [{ title: { contains: state.q } }, { 'responsible.name': { contains: state.q } }],
-    })
+    const q = isActivityListSearchReady(state.q)
+    if (q) {
+      filters.push({
+        or: [{ title: { contains: q } }, { 'responsible.name': { contains: q } }],
+      })
+    }
   }
 
   if (state.kind) filters.push({ kind: { equals: state.kind } })
diff --git a/tests/unit/activityUi.unit.spec.ts b/tests/unit/activityUi.unit.spec.ts
index e5dd86b2..e91cab15 100644
--- a/tests/unit/activityUi.unit.spec.ts
+++ b/tests/unit/activityUi.unit.spec.ts
@@ -43,6 +43,7 @@ describe('parseActivityListParams', () => {
   it('parses and trims q', () => {
     expect(parseActivityListParams({ q: '  comício  ' }).q).toBe('comício')
     expect(parseActivityListParams({ q: '   ' }).q).toBeUndefined()
+    expect(parseActivityListParams({ q: 'a' }).q).toBeUndefined()
   })
 })