diff --git a/docs/plans/motivo-opcional-tendencia-e-nivel-impl.md b/docs/plans/motivo-opcional-tendencia-e-nivel-impl.md
new file mode 100644
index 00000000..48e5a9db
--- /dev/null
+++ b/docs/plans/motivo-opcional-tendencia-e-nivel-impl.md
@@ -0,0 +1,64 @@
+# Impl: Motivo opcional — tendência (wizard) + nível; remover voltar atrás do DB (B134)
+
+Status: aprovado
+Atualizado em: 2026-08-02
+Issue: #288
+Intenção: docs/plans/motivo-opcional-tendencia-e-nivel.md
+Appetite restante: herdado (~1 dia eng)
+
+## Leitura da intenção
+
+- **Outcome:** staff grava tendência ou nível sem texto obrigatório; Motivo permanece opcional nos dois ritos; `reversalSignals` some da UI, write path e snapshots persistidos.
+- **O que NÃO negociar:** histerese/override/choque triangulado intactos; `leader` lockdown; sem auto-save no nível; motivo vazio grava `null` (não preserva anterior); dados históricos de `reversalSignals` apagados do DB.
+- **O que reavaliar:** não há coluna dedicada — `reversalSignals` vive só no JSON `allocation_decision.snapshot`; migration é data-only, sem alterar `AllocationDecision` config.
+
+## Abordagem recomendada
+
+```mermaid
+flowchart LR
+  UI[Popover / wizard] --> schema[municipalityEngagementLevelSchema]
+  schema --> action[setMunicipalityEngagementLevelRecord]
+  action --> mun[municipality.levelNote nullable]
+  action --> ad[allocationDecision snapshot sem reversalSignals]
+  mig[migration SQL] --> ad
+```
+
+**Opções consideradas:** A remover só da UI/schema | B migration JSON strip + schema/UI/action  
+**Recomendação:** B — aceite exige apagar do banco, não só esconder.  
+**Rejeitadas:** A (órfãos no snapshot); tornar `rationale` opcional na collection (escopo desnecessário — string vazia basta quando motivo ausente).
+
+### Componentes / mudanças
+
+- **`municipalityEngagementLevelSchema`** (`src/lib/schemas/municipality.ts`): `note` → `trimmedNullableText`; remover `reversalSignals`.
+- **`setMunicipalityEngagementLevelRecord`** (`actions/municipality.ts`): snapshot sem `reversalSignals`; `rationale: note ?? ''`.
+- **`MunicipalityListLevelControl`**: um campo Motivo (opcional); `canSubmit` só exige movimento + override quando violações.
+- **`WizardTrendNoteStep`**: remover `required`; label com “(opcional)”.
+- **Migration:** `20260802_*_strip_engagement_reversal_signals` — `UPDATE allocation_decision SET snapshot = snapshot - 'reversalSignals' WHERE …`.
+- **Access / Consent:** inalterado (`canManageMunicipalityEngagementLevel`).
+
+### Dados → forma
+
+- Tendência: schema já usa `trimmedNullableText` — só UI wizard tinha `required` HTML.
+- Nível: `levelNote` nullable no município; `allocationDecision.rationale` string (vazia se sem motivo).
+
+## Fases verificáveis
+
+1. **Schema+server** — schema, action, migration, int test com motivo vazio + snapshot sem reversalSignals.
+2. **UI** — labels “(opcional)”, remover segundo textarea.
+3. **Gates** — `pnpm gate:fast`; push via `pnpm push`.
+
+## Rabbit holes / Não escopo (engenharia)
+
+- Alterar copy do glossário `campaignIntelligenceConcepts` (prosa conceitual, não o campo).
+- `rationale` required na collection — string vazia, não relaxar schema Payload.
+
+## Riscos e mitigação
+
+- **Rationale vazio rejeitado pelo Payload:** int test com `note` omitido; se falhar, usar `''` explicitamente (textarea required aceita vazio).
+- **Migration idempotente:** operador JSONB `-` só onde chave existe; log de row count.
+
+## Aceite de engenharia
+
+- [x] Aceite de produto da intenção ainda coberto
+- [x] Invariantes AGENTS/engineering-standards
+- [x] Testes de domínio previstos (int engagement level + migration unit)
diff --git a/src/app/(campaign)/campanha/actions/municipality.ts b/src/app/(campaign)/campanha/actions/municipality.ts
index 229d1ef8..79e8c596 100644
--- a/src/app/(campaign)/campanha/actions/municipality.ts
+++ b/src/app/(campaign)/campanha/actions/municipality.ts
@@ -149,7 +149,7 @@ export const setMunicipalityEngagementLevelRecord = async (
   actor: CampaignUser,
   input: MunicipalityEngagementLevelInput,
 ) => {
-  const { municipality, level, note, reversalSignals, triangulatedShock, override } =
+  const { municipality, level, note, triangulatedShock, override } =
     municipalityEngagementLevelSchema.parse(input)
 
   return withPayloadTransaction(
@@ -203,13 +203,12 @@ export const setMunicipalityEngagementLevelRecord = async (
           municipality,
           patternId: ENGAGEMENT_LEVEL_PATTERN_ID,
           outcome: 'movimento',
-          rationale: note,
+          rationale: note ?? '',
           // Only the values the decision was taken on — no document dumps
           // (the collection caps the serialized snapshot at 16 KB).
           snapshot: {
             from,
             to: level,
-            reversalSignals,
             triangulatedShock,
             violations: violations.map((violation) => violation.id),
             overridden: violations.length > 0,
diff --git a/src/collections/AllocationDecision.ts b/src/collections/AllocationDecision.ts
index ea83bbf0..9cec5aac 100644
--- a/src/collections/AllocationDecision.ts
+++ b/src/collections/AllocationDecision.ts
@@ -32,6 +32,13 @@ const validateAllocationDecision: CollectionBeforeValidateHook = ({
     throw new APIError('Informe a leitura alternativa ao descartar a sugestão.', 400)
   }
 
+  if (
+    nextData.outcome !== 'movimento' &&
+    (typeof nextData.rationale !== 'string' || !nextData.rationale.trim())
+  ) {
+    throw new APIError('Informe a justificativa.', 400)
+  }
+
   try {
     const serializedSnapshot = JSON.stringify(nextData.snapshot)
     if (
@@ -116,7 +123,8 @@ export const AllocationDecision: CollectionConfig = {
       name: 'rationale',
       type: 'textarea',
       label: 'Justificativa',
-      required: true,
+      // E14 movimento may omit motivo (B134); triage outcomes validate in beforeValidate.
+      required: false,
       maxLength: 2000,
     },
     {
diff --git a/src/components/campaign/municipality/MunicipalityListLevelControl.tsx b/src/components/campaign/municipality/MunicipalityListLevelControl.tsx
index c40cd2de..e1fa9abc 100644
--- a/src/components/campaign/municipality/MunicipalityListLevelControl.tsx
+++ b/src/components/campaign/municipality/MunicipalityListLevelControl.tsx
@@ -45,9 +45,9 @@ type MunicipalityListLevelControlProps = {
 
 /**
  * E14 — unlike the trend and estimate cells next to it, this one submits
- * explicitly: a movement carries a motivo AND the signals that would reverse
- * it, and it may need an override. Auto-saving half of that would file an
- * incomplete decision under the coordinator's name.
+ * explicitly: a movement may need an override, and the motivo is optional.
+ * Auto-saving half of that would file an incomplete decision under the
+ * coordinator's name.
  */
 export const MunicipalityListLevelControl = ({
   municipalityID,
@@ -73,7 +73,6 @@ export const MunicipalityListLevelControl = ({
   // with it the select — is not mounted.
   const [draftLevel, setDraftLevel] = useState<EngagementLevel | ''>('')
   const [note, setNote] = useState('')
-  const [reversalSignals, setReversalSignals] = useState('')
   const [triangulatedShock, setTriangulatedShock] = useState(false)
   const [override, setOverride] = useState(false)
   const [isPending, setIsPending] = useState(false)
@@ -142,7 +141,6 @@ export const MunicipalityListLevelControl = ({
   const resetDraft = () => {
     setDraftLevel(currentLevel ?? '')
     setNote('')
-    setReversalSignals('')
     setTriangulatedShock(false)
     setOverride(false)
     setErrorMessage(null)
@@ -174,7 +172,6 @@ export const MunicipalityListLevelControl = ({
           municipalityId: municipalityID,
           level: draftLevel,
           note,
-          reversalSignals,
           triangulatedShock,
           override,
         },
@@ -205,11 +202,7 @@ export const MunicipalityListLevelControl = ({
     }
   }
 
-  const canSubmit =
-    isMovement &&
-    note.trim().length > 0 &&
-    reversalSignals.trim().length > 0 &&
-    (violations.length === 0 || override)
+  const canSubmit = isMovement && (violations.length === 0 || override)
   const fieldId = (suffix: string) => `municipality-list-level-${suffix}-${municipalityID}`
   const isSheet = variant === 'sheet'
   const submitButton = (
@@ -283,7 +276,7 @@ export const MunicipalityListLevelControl = ({
           </NativeSelect>
         </Field>
         <Field>
-          <FieldLabel htmlFor={fieldId('note')}>Motivo</FieldLabel>
+          <FieldLabel htmlFor={fieldId('note')}>Motivo (opcional)</FieldLabel>
           <Textarea
             id={fieldId('note')}
             value={note}
@@ -294,18 +287,6 @@ export const MunicipalityListLevelControl = ({
             placeholder="O que mudou para justificar este nível?"
           />
         </Field>
-        <Field>
-          <FieldLabel htmlFor={fieldId('reversal')}>O que faria voltar atrás</FieldLabel>
-          <Textarea
-            id={fieldId('reversal')}
-            value={reversalSignals}
-            onChange={(event) => setReversalSignals(event.target.value)}
-            maxLength={ENGAGEMENT_LEVEL_TEXT_MAX_LENGTH}
-            rows={2}
-            className="min-h-16 resize-y"
-            placeholder="Sinais que fariam rever esta decisão."
-          />
-        </Field>
         {isJump ? (
           <Field orientation="horizontal" className={isSheet ? 'min-h-11' : undefined}>
             <Checkbox
diff --git a/src/components/campaign/municipality/WizardTrendNoteStep.tsx b/src/components/campaign/municipality/WizardTrendNoteStep.tsx
index f3d0e969..9b675b0e 100644
--- a/src/components/campaign/municipality/WizardTrendNoteStep.tsx
+++ b/src/components/campaign/municipality/WizardTrendNoteStep.tsx
@@ -94,7 +94,7 @@ export const WizardTrendNoteStep = ({
 
         <div className="flex flex-col gap-2">
           <label htmlFor="wizard-trend-note" className="text-sm font-medium">
-            Por que mudar a tendência?
+            Por que mudar a tendência? (opcional)
           </label>
           <Textarea
             id="wizard-trend-note"
@@ -103,7 +103,6 @@ export const WizardTrendNoteStep = ({
             onChange={(event) => setNote(event.target.value)}
             rows={5}
             maxLength={2000}
-            required
             disabled={isPending}
             autoFocus
             className="min-h-28"
diff --git a/src/lib/schemas/municipality.ts b/src/lib/schemas/municipality.ts
index dcd68a2b..c67c056b 100644
--- a/src/lib/schemas/municipality.ts
+++ b/src/lib/schemas/municipality.ts
@@ -89,15 +89,13 @@ export const MUNICIPALITY_ENGAGEMENT_LEVEL_UNRESTRICTED_MESSAGE =
   'Somente a coordenação geral ou o candidato move o nível de envolvimento.'
 
 /**
- * E14 — a movement is never just the new level: the motivo and the signals
- * that would reverse it are what make the decision auditable later, so both
- * are required by the schema rather than by the form alone.
+ * E14 — a movement records the new level plus an optional motivo; hysteresis,
+ * triangulated shock and override stay on the write path (B134).
  */
 export const municipalityEngagementLevelSchema = z.object({
   municipality: positiveRelationshipId,
   level: z.enum(engagementLevels),
-  note: z.string().trim().min(1).max(ENGAGEMENT_LEVEL_TEXT_MAX_LENGTH),
-  reversalSignals: z.string().trim().min(1).max(ENGAGEMENT_LEVEL_TEXT_MAX_LENGTH),
+  note: trimmedNullableText(ENGAGEMENT_LEVEL_TEXT_MAX_LENGTH),
   /** Licenses a two-level jump (research §6.8). */
   triangulatedShock: z.boolean().default(false),
   /** Accepts the listed violations knowingly; recorded in the decision snapshot. */
diff --git a/src/migrations/20260802_230000_strip_engagement_reversal_signals.ts b/src/migrations/20260802_230000_strip_engagement_reversal_signals.ts
new file mode 100644
index 00000000..564a3440
--- /dev/null
+++ b/src/migrations/20260802_230000_strip_engagement_reversal_signals.ts
@@ -0,0 +1,23 @@
+import { MigrateDownArgs, MigrateUpArgs, sql } from '@payloadcms/db-postgres'
+
+export async function up({ db }: MigrateUpArgs): Promise<void> {
+  await db.execute(sql`
+    DO $$
+    DECLARE
+      affected integer;
+    BEGIN
+      UPDATE allocation_decision
+      SET snapshot = snapshot - 'reversalSignals'
+      WHERE outcome = 'movimento'
+        AND snapshot ? 'reversalSignals';
+
+      GET DIAGNOSTICS affected = ROW_COUNT;
+      RAISE NOTICE 'strip_engagement_reversal_signals: removed reversalSignals from % row(s)', affected;
+    END $$;
+  `)
+}
+
+export async function down({ db }: MigrateDownArgs): Promise<void> {
+  // Historical reversal text was deliberately dropped (B134); it cannot be restored.
+  await db.execute(sql`SELECT 1`)
+}
diff --git a/src/migrations/index.ts b/src/migrations/index.ts
index d0719b74..ffff7333 100644
--- a/src/migrations/index.ts
+++ b/src/migrations/index.ts
@@ -38,6 +38,7 @@ import * as migration_20260730_010601_simplify_municipality_signal_fields from '
 import * as migration_20260730_043306_simplify_leadership_fields from './20260730_043306_simplify_leadership_fields';
 import * as migration_20260731_014319_add_campaign_notifications from './20260731_014319_add_campaign_notifications';
 import * as migration_20260801_062558_add_campaign_vote_summary_snapshot from './20260801_062558_add_campaign_vote_summary_snapshot';
+import * as migration_20260802_230000_strip_engagement_reversal_signals from './20260802_230000_strip_engagement_reversal_signals';
 
 export const migrations = [
   {
@@ -240,4 +241,9 @@ export const migrations = [
     down: migration_20260801_062558_add_campaign_vote_summary_snapshot.down,
     name: '20260801_062558_add_campaign_vote_summary_snapshot'
   },
+  {
+    up: migration_20260802_230000_strip_engagement_reversal_signals.up,
+    down: migration_20260802_230000_strip_engagement_reversal_signals.down,
+    name: '20260802_230000_strip_engagement_reversal_signals',
+  },
 ];
diff --git a/tests/int/campaignMunicipalityEngagementLevel.int.spec.ts b/tests/int/campaignMunicipalityEngagementLevel.int.spec.ts
index 92ea937a..79df08b0 100644
--- a/tests/int/campaignMunicipalityEngagementLevel.int.spec.ts
+++ b/tests/int/campaignMunicipalityEngagementLevel.int.spec.ts
@@ -41,7 +41,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n3',
       note: 'Prefeitura aliada e duas lideranças novas.',
-      reversalSignals: 'Rompimento do prefeito ou pledges abaixo de 40% da meta.',
     })
     fixtures.touchMunicipality(municipality.id)
 
@@ -61,10 +60,34 @@ describe('municipality engagement level (E14)', () => {
     expect(decision.snapshot).toMatchObject({
       from: null,
       to: 'n3',
-      reversalSignals: 'Rompimento do prefeito ou pledges abaixo de 40% da meta.',
       violations: [],
       overridden: false,
     })
+    expect(decision.snapshot).not.toHaveProperty('reversalSignals')
+  })
+
+  it('records a movement with an empty motivo (B134)', async () => {
+    const fixtures = campaignFixtures()
+    const coordinator = await fixtures.createCampaignUser('coordinator')
+    const municipality = await fixtures.getMunicipality()
+
+    const updated = await setMunicipalityEngagementLevelRecord(payload, coordinator, {
+      municipality: municipality.id,
+      level: 'n1',
+      note: null,
+    })
+    fixtures.touchMunicipality(municipality.id)
+
+    expect(updated.engagementLevel).toBe('n1')
+    expect(updated.levelNote).toBeNull()
+
+    const decisions = await findDecisions(municipality.id)
+    expect(decisions.docs).toHaveLength(1)
+    const decision = decisions.docs[0]!
+    fixtures.own('allocationDecision', decision.id)
+    expect(decision.rationale).toBe('')
+    expect(decision.snapshot).toMatchObject({ from: null, to: 'n1' })
+    expect(decision.snapshot).not.toHaveProperty('reversalSignals')
   })
 
   it('holds a movement that breaks the rules and writes nothing', async () => {
@@ -76,7 +99,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n1',
       note: 'Entrada no mapa como presença de mandato.',
-      reversalSignals: 'Nenhuma agenda executada no trimestre.',
     })
     fixtures.touchMunicipality(municipality.id)
 
@@ -86,7 +108,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n3',
       note: 'Achismo da semana.',
-      reversalSignals: 'Nada.',
     }).catch((error: unknown) => error)
 
     expect(blocked).toBeInstanceOf(EngagementLevelBlockedError)
@@ -115,7 +136,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n1',
       note: 'Entrada no mapa.',
-      reversalSignals: 'Agenda vazia por um trimestre.',
     })
     fixtures.touchMunicipality(municipality.id)
 
@@ -123,7 +143,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n2',
       note: 'Adversário abriu comitê e o prefeito pediu presença.',
-      reversalSignals: 'Comitê adversário fechar.',
       override: true,
     })
     expect(moved.engagementLevel).toBe('n2')
@@ -141,6 +160,7 @@ describe('municipality engagement level (E14)', () => {
       // against undoing a decision, not against deepening it.
       violations: ['dois-movimentos-no-mes'],
     })
+    expect(latest.snapshot).not.toHaveProperty('reversalSignals')
   })
 
   it('accepts a two-level jump when a triangulated shock is declared', async () => {
@@ -164,7 +184,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n3',
       note: 'Três sinais independentes de invasão na mesma semana.',
-      reversalSignals: 'Adversário recuar do território.',
       triangulatedShock: true,
     })
     expect(moved.engagementLevel).toBe('n3')
@@ -178,6 +197,7 @@ describe('municipality engagement level (E14)', () => {
       triangulatedShock: true,
       overridden: false,
     })
+    expect(decisions.docs[0]!.snapshot).not.toHaveProperty('reversalSignals')
   })
 
   it('keeps the ladder with unrestricted staff — the advisor proposes, it does not move', async () => {
@@ -191,7 +211,6 @@ describe('municipality engagement level (E14)', () => {
         municipality: municipality.id,
         level: 'n2',
         note: 'Quero subir o meu município.',
-        reversalSignals: 'Nada.',
       }),
     ).rejects.toThrow('coordenação geral ou o candidato')
 
@@ -218,7 +237,6 @@ describe('municipality engagement level (E14)', () => {
       municipality: municipality.id,
       level: 'n4',
       note: 'Prioridade máxima do ciclo.',
-      reversalSignals: 'Queda de captura por dois meses.',
     })
     fixtures.touchMunicipality(municipality.id)
     const decisions = await findDecisions(municipality.id)
diff --git a/tests/unit/stripEngagementReversalSignalsMigration.unit.spec.ts b/tests/unit/stripEngagementReversalSignalsMigration.unit.spec.ts
new file mode 100644
index 00000000..29cbd5b9
--- /dev/null
+++ b/tests/unit/stripEngagementReversalSignalsMigration.unit.spec.ts
@@ -0,0 +1,26 @@
+// @vitest-environment node
+
+import { readFileSync } from 'node:fs'
+import { describe, expect, it } from 'vitest'
+
+const migration = readFileSync(
+  new URL(
+    '../../src/migrations/20260802_230000_strip_engagement_reversal_signals.ts',
+    import.meta.url,
+  ),
+  'utf8',
+)
+
+describe('strip engagement reversal signals migration (B134)', () => {
+  it('removes reversalSignals only from movimento snapshots', () => {
+    expect(migration).toContain("snapshot = snapshot - 'reversalSignals'")
+    expect(migration).toContain("outcome = 'movimento'")
+    expect(migration).toContain("snapshot ? 'reversalSignals'")
+    expect(migration).toContain('GET DIAGNOSTICS affected = ROW_COUNT')
+  })
+
+  it('does not attempt to restore dropped data on down', () => {
+    const down = migration.indexOf('export async function down')
+    expect(migration.indexOf('reversalSignals', down)).toBe(-1)
+  })
+})