diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 44496a6e..14262138 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -230,7 +230,7 @@ jobs:
       - name: Log deploy deferral
         if: steps.tip.outputs.stale != 'true' && steps.cooldown.outputs.active == 'true'
         run: |
-          echo "Deploy deferred: last production deploy is younger than 30 minutes."
+          echo "Deploy deferred: last production deploy is younger than 15 minutes."
           echo "Requeue will retry in ${{ steps.cooldown.outputs.wait_seconds }}s."
       # `vercel build` shells out to pnpm (packageManager in package.json); without
       # these steps the runner only has npm → spawn pnpm ENOENT.
diff --git a/docs/plans/ci-deploy-cooldown-15min-impl.md b/docs/plans/ci-deploy-cooldown-15min-impl.md
new file mode 100644
index 00000000..5955067f
--- /dev/null
+++ b/docs/plans/ci-deploy-cooldown-15min-impl.md
@@ -0,0 +1,70 @@
+# Impl: CI — cooldown de deploy de produção: 30 → 15 min
+
+Status: aprovado
+Atualizado em: 2026-08-02
+Issue: #259
+Intenção: docs/plans/ci-deploy-cooldown-15min.md
+Appetite restante: herdado (~0,25 dia) — só constante + pins
+
+## Leitura da intenção
+
+- **Outcome:** intervalo mínimo entre deploys READY de produção passa de 30 para **15 minutos**; deferral + requeue inalterados; logs/pins honestos.
+- **O que NÃO negociar:** não remover cooldown; não mudar fonte da idade (Vercel READY production); não tocar `ci-pr.yml` / required checks / preview Git.
+- **O que reavaliar:** hipótese do plano de intenção confirma — dono é `DEPLOY_COOLDOWN_MS` em `scripts/lib/vercel-deploy-cooldown.mjs`; CLI já deriva minutos do constante.
+
+## Abordagem recomendada
+
+```mermaid
+flowchart LR
+  A[ci.yml deploy job] --> B[vercel-deploy-cooldown.mjs]
+  B --> C[evaluateDeployCooldown]
+  C --> D{DEPLOY_COOLDOWN_MS}
+  D -->|"< 15 min"| E[defer + requeue]
+  D -->|">= 15 min"| F[vercel deploy --prod]
+```
+
+**Opções consideradas:**
+
+- **A)** Alterar só `DEPLOY_COOLDOWN_MS` + pins — mínimo diff, CLI auto-ajusta log.
+- **B)** Parametrizar via env `DEPLOY_COOLDOWN_MINUTES` no workflow — flexível, mas YAGNI e duplica fonte da verdade.
+- **C)** Documentar 15 min só no workflow, constante 30 no script — mente nos testes.
+
+**Recomendação:** **A** — uma constante nomeada já é o contrato OPS11; workflow só precisa do echo humano.
+
+**Rejeitadas:** B (over-engineering); C (pins mentirosos).
+
+### Componentes / mudanças
+
+- **`DEPLOY_COOLDOWN_MS`** (`scripts/lib/vercel-deploy-cooldown.mjs`): `30 * 60 * 1000` → `15 * 60 * 1000`.
+- **`.github/workflows/ci.yml`**: echo de deferral "30 minutes" → "15 minutes".
+- **`tests/unit/vercelDeployCooldown.unit.spec.ts`**: pin da constante + descrições; ajustar `waitSeconds` no caso 10 min atrás (20 min → 5 min residual).
+- **Migration:** sem migration.
+- **Access / Consent:** N/A.
+- **UI:** N/A (Impeccable A).
+
+### Dados → forma
+
+N/A — política de infra.
+
+## Fases verificáveis
+
+1. **Constante + workflow log** — alterar `DEPLOY_COOLDOWN_MS` e echo em `ci.yml`.
+2. **Pins unitários** — atualizar `vercelDeployCooldown.unit.spec.ts`.
+3. **Gates** — `pnpm gate:fast`; entrega com `pnpm push`.
+
+## Rabbit holes / Não escopo (engenharia)
+
+- Reescrever `docs/plans/ci-deploy-cooldown-vercel.md` (histórico OPS11).
+- Parametrizar cooldown por env sem pedido de produto.
+- Batch de merges / teto diário de deploys.
+
+## Riscos e mitigação
+
+- **429 `api-upload-free` volta:** observar pós-merge; reabrir com evidência (assumido na intenção).
+- **Echo hardcoded no workflow:** aceito — único lugar; constante é fonte da verdade para lógica.
+
+## Aceite de engenharia
+
+- [x] Aceite de produto da intenção ainda coberto
+- [x] Invariantes AGENTS/engineering-standards
+- [x] Testes de domínio previstos (unit pins existentes)
diff --git a/scripts/lib/vercel-deploy-cooldown.mjs b/scripts/lib/vercel-deploy-cooldown.mjs
index 86199037..2900fb1d 100644
--- a/scripts/lib/vercel-deploy-cooldown.mjs
+++ b/scripts/lib/vercel-deploy-cooldown.mjs
@@ -3,7 +3,7 @@
  * deployment and computes whether CI should defer another upload (OPS11).
  */
 
-export const DEPLOY_COOLDOWN_MS = 30 * 60 * 1000
+export const DEPLOY_COOLDOWN_MS = 15 * 60 * 1000
 
 const VERCEL_API_BASE = 'https://api.vercel.com'
 
diff --git a/tests/unit/vercelDeployCooldown.unit.spec.ts b/tests/unit/vercelDeployCooldown.unit.spec.ts
index e8e1bd11..f2b52709 100644
--- a/tests/unit/vercelDeployCooldown.unit.spec.ts
+++ b/tests/unit/vercelDeployCooldown.unit.spec.ts
@@ -27,8 +27,8 @@ const captureFetch = (response: Response) => {
 }
 
 describe('vercelDeployCooldown', () => {
-  it('uses a 30-minute cooldown constant', () => {
-    expect(DEPLOY_COOLDOWN_MS).toBe(30 * 60 * 1000)
+  it('uses a 15-minute cooldown constant', () => {
+    expect(DEPLOY_COOLDOWN_MS).toBe(15 * 60 * 1000)
   })
 
   it('lastProductionReadyAtFromDeployment prefers ready over createdAt', () => {
@@ -45,25 +45,25 @@ describe('vercelDeployCooldown', () => {
     })
   })
 
-  it('computeCooldownWait defers when the last deploy is younger than 30 minutes', () => {
+  it('computeCooldownWait defers when the last deploy is younger than 15 minutes', () => {
     const now = 1_700_000_000_000
     const last = now - 10 * 60 * 1000
 
     expect(computeCooldownWait(last, now)).toEqual({
       active: true,
-      waitSeconds: 20 * 60,
+      waitSeconds: 5 * 60,
       ageMs: 10 * 60 * 1000,
     })
   })
 
-  it('computeCooldownWait clears when the last deploy is older than 30 minutes', () => {
+  it('computeCooldownWait clears when the last deploy is older than 15 minutes', () => {
     const now = 1_700_000_000_000
-    const last = now - 31 * 60 * 1000
+    const last = now - 16 * 60 * 1000
 
     expect(computeCooldownWait(last, now)).toEqual({
       active: false,
       waitSeconds: 0,
-      ageMs: 31 * 60 * 1000,
+      ageMs: 16 * 60 * 1000,
     })
   })