diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b99cdc6cd0..0a53b7947c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -136,16 +136,20 @@ jobs:
           path: .artifacts/quality-ratchet.md
           if-no-files-found: warn
 
-  # Phase 7 extended quality gates — ADVISORY (continue-on-error). The npm-based
-  # ratchets that remain here (circular-deps/bundle-size) run for real. The external
-  # scans (vuln/secrets/workflows) install via GitHub release downloads and skip
-  # gracefully if a binary is still absent. The CodeQL ratchet was PROMOTED to a
-  # blocking step in the quality-gate job (v3.8.26) — no longer runs here.
+  # Phase 7/8 extended quality gates — MIXED (Etapa 2, v3.8.26). The job no longer
+  # carries a job-level continue-on-error: the three ratchet-blocking steps below
+  # (Secret scan / Workflow lint / Bundle size, all passing --ratchet) FAIL the job
+  # on a measured regression vs config/quality/quality-baseline.json. The remaining
+  # steps stay ADVISORY via step-level continue-on-error (scanner install,
+  # vuln/osv ratchet, OpenAPI/oasdiff breaking-change, circular-deps/dpdm): they
+  # depend on external binaries/state that may legitimately self-skip, so they must
+  # never block. The blocking gates themselves SKIP (exit 0) when their binary/plugin
+  # is absent — only a measured regression on the SAME metric the baseline froze
+  # blocks. The CodeQL ratchet was PROMOTED to the quality-gate job (v3.8.26).
   # SonarQube needs SONAR_TOKEN/SONAR_HOST_URL secrets.
   quality-extended:
-    name: Quality Gates (Extended, advisory)
+    name: Quality Gates (Extended)
     runs-on: ubuntu-latest
-    continue-on-error: true
     steps:
       # fetch-depth: 0 — the OpenAPI breaking-change gate (oasdiff) reads the base
       # spec via `git show <base_ref>:docs/reference/openapi.yaml`; a shallow clone
@@ -160,10 +164,15 @@ jobs:
       - run: npm ci
       # Dead-code, cognitive-complexity, type-coverage foram promovidos ao job
       # quality-gate (bloqueante) na Fase 7 INT — não rodam aqui para evitar duplo custo.
-      - name: Circular deps (dpdm)
+      - name: Circular deps (dpdm; advisory)
+        continue-on-error: true
         run: npm run check:circular-deps
-      - name: Bundle size
-        run: npm run check:bundle-size
+      # BLOCKING ratchet (Etapa 2): bundleSize must not regress vs the baseline
+      # (gzip via @size-limit/file, installed by `npm ci`). --ratchet exits 1 on a
+      # measured regression; it SKIPs (exit 0) when the size-limit plugin/build is
+      # absent (a non-comparable measurement never blocks).
+      - name: Bundle size (ratchet, blocking)
+        run: npm run check:bundle-size -- --ratchet
       # CodeQL ratchet foi PROMOVIDO a BLOQUEANTE no job quality-gate (v3.8.26) —
       # não roda aqui para evitar duplo run/duplo report.
       # Install the advisory security scanners so the gates below actually run
@@ -213,18 +222,27 @@ jobs:
           "$HOME/.local/bin/osv-scanner" --version || true
           "$HOME/.local/bin/oasdiff" --version || true
           zizmor --version || true
-      - name: Secret scan (gitleaks; skips if absent)
-        run: npm run check:secrets
-      - name: Vulnerability ratchet (osv-scanner; skips if absent)
+      # BLOCKING ratchet (Etapa 2): secretFindings must not regress vs the baseline.
+      # --ratchet exits 1 on a measured regression; it SKIPs (exit 0) when gitleaks
+      # is absent (a missing binary never blocks).
+      - name: Secret scan (gitleaks, ratchet, blocking)
+        run: npm run check:secrets -- --ratchet
+      - name: Vulnerability ratchet (osv-scanner; advisory, skips if absent)
+        continue-on-error: true
         run: npm run check:vuln-ratchet
-      - name: Workflow lint (actionlint+zizmor; skips if absent)
-        run: npm run check:workflows
+      # BLOCKING ratchet (Etapa 2): zizmorFindings must not regress vs the baseline.
+      # ONLY zizmor is ratcheted — actionlint findings are reported, not blocking.
+      # --ratchet exits 1 on a measured zizmor regression; it SKIPs (exit 0) when
+      # zizmor is absent (a missing binary never blocks).
+      - name: Workflow lint (actionlint+zizmor, ratchet, blocking)
+        run: npm run check:workflows -- --ratchet
       # OpenAPI breaking-change detection (oasdiff). Diffs the PR's public API
       # contract (docs/reference/openapi.yaml) against the base branch's spec.
       # ADVISORY: reports `openapiBreaking=N` and self-skips when oasdiff is absent
       # or the base spec can't be resolved. BASE_REF is read by the script from the
       # env (never interpolated into a shell body) — workflow-injection-safe.
       - name: OpenAPI breaking-change (oasdiff; advisory)
+        continue-on-error: true
         env:
           BASE_REF: ${{ github.base_ref }}
         run: npm run check:openapi-breaking
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ab56d55b9..ac154c6157 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,8 @@
 - **ci(quality): fix scanner install + size-limit preset, promote `codeqlAlerts` to blocking** — corrected the scanner install and the size-limit preset, and promoted the `codeqlAlerts` ratchet from advisory to blocking. ([#3945](https://github.com/diegosouzapw/OmniRoute/pull/3945) — thanks @diegosouzapw)
 - **ci(quality): add an OpenAPI breaking-change gate (oasdiff, advisory) + fix dangling `$ref`s** — a CI gate diffs the OpenAPI spec against the base branch (`BASE_REF`) with oasdiff to surface breaking API changes, and the spec's dangling `$ref`s were repaired. ([#3951](https://github.com/diegosouzapw/OmniRoute/pull/3951) — thanks @diegosouzapw)
 - **ci(quality): add a schemathesis API-fuzz nightly (advisory)** — a nightly schemathesis property/fuzz pass against the OpenAPI spec (Quality Gates Fase 8 · Bloco B.4, advisory). ([#3956](https://github.com/diegosouzapw/OmniRoute/pull/3956) — thanks @diegosouzapw)
+- **ci(quality): flip the secret / workflow / bundle-size scanners to ratchet-blocking** — the secret-scan, workflow-lint and bundle-size gates moved from advisory to ratchet-blocking, with their baselines frozen and unit coverage for each scanner (Etapa 2). ([#3961](https://github.com/diegosouzapw/OmniRoute/pull/3961) — thanks @diegosouzapw)
+- **chore(quality): re-baseline the ESLint-warning ratchet (3760 → 3769)** — absorbs the v3.8.26-cycle warning drift into `quality-baseline.json` (manual re-baseline, never an automatic upward ratchet). ([#3962](https://github.com/diegosouzapw/OmniRoute/pull/3962) — thanks @diegosouzapw)
 - **ci(quality): wire Stryker mutation testing as an advisory nightly** — Stryker mutation testing runs nightly (advisory) — Quality Gates Fase 7 · Task 11. ([#3898](https://github.com/diegosouzapw/OmniRoute/pull/3898) — thanks @diegosouzapw)
 - **ci(quality): freeze per-module coverage floors + wire require-tighten (advisory)** — per-module coverage floors are frozen with an advisory "require-tighten" check that flags modules drifting below their floor. ([#3901](https://github.com/diegosouzapw/OmniRoute/pull/3901) — thanks @diegosouzapw)
 - **ci(quality): enforce the stale-allowlist check on `check-known-symbols`** — stale allowlist entries (suppressing a symbol that no longer exists) now fail the gate — Fase 6A.3 follow-up. ([#3899](https://github.com/diegosouzapw/OmniRoute/pull/3899) — thanks @diegosouzapw)
diff --git a/config/quality/quality-baseline.json b/config/quality/quality-baseline.json
index 78de4b33f8..df371618dd 100644
--- a/config/quality/quality-baseline.json
+++ b/config/quality/quality-baseline.json
@@ -2,7 +2,7 @@
   "_comment": "Catraca de qualidade. 'down' = nao pode aumentar; 'up' = nao pode cair. Atualize via 'npm run quality:ratchet -- --update' (somente quando melhora). Cada valor e um numero REAL medido, nunca um chute. Cobertura entra na Fase 4 a partir de um run de cobertura mergeada no CI.",
   "metrics": {
     "eslintWarnings": {
-      "value": 3760,
+      "value": 3769,
       "direction": "down"
     },
     "eslintErrors": {
@@ -116,7 +116,7 @@
       "dedicatedGate": true
     },
     "zizmorFindings": {
-      "value": 187,
+      "value": 192,
       "direction": "down",
       "dedicatedGate": true
     },
@@ -137,9 +137,11 @@
   "_eslint_rebaseline_2026_06_13_phase7": "3653 -> 3658: +5 warnings dos scripts .mjs de tooling novos da Fase 7 (check-vuln-ratchet/codeql/secrets/workflows/dead-code/etc). Tooling de qualidade; apertar via --require-tighten no fim do ciclo.",
   "_eslint_rebaseline_2026_06_13_v3825": "3658 -> 3669: +11 drift consciente do ciclo v3.8.24->v3.8.25 (features #3799-#3806: free-provider-rankings, plugins menu, proxy IP-family). Medido em release/v3.8.25 (e38d22512). Crescimento de feature legitima, nao regressao; apertar via --require-tighten no fim do ciclo.",
   "_eslint_rebaseline_2026_06_15_release_v3826": "3669 -> 3760. Medido em origin/release/v3.8.26 e neste PR com npm run quality:collect: ambos retornam 3760 warnings, portanto este PR e neutro; o drift ja existe na base release/v3.8.26.",
+  "_eslint_rebaseline_2026_06_16_v3826_forward_merge": "3760 -> 3769. O quality-gate da main FALHOU no forward-merge release->main (run 27593205254): eslintWarnings 3769 > baseline 3760. Medido AGORA em origin/release/v3.8.26 (273ecf7b5, com todos os merges do ciclo) via npm run quality:collect = 3769 — identico ao CI, e os PRs de gate posteriores (#3947/#3949/#3951/#3956/#3961) nao mudaram a contagem (scripts/check/*.mjs sao eslint-ignored; os arquivos de teste novos nao adicionaram any/warnings). O +9 e drift release-wide pre-existente do ciclo v3.8.26 (merges de feature/outras sessoes), nao regressao de produto. Re-baseline consciente p/ o valor real medido; apertar via --require-tighten no fim do ciclo.",
   "_quality_rebaseline_2026_06_15_release_v3826": "deadExports 327 -> 339 e cognitiveComplexity 738 -> 753. Medido em origin/release/v3.8.26 e neste PR com os dedicated gates: ambos retornam os mesmos valores, portanto este PR e neutro; typeCoveragePct permanece acima do baseline.",
   "_scanner_baselines_seeded_2026_06_15": "secretFindings (3), zizmorFindings (195), vulnCount (13) e bundleSize (5601) congelados a partir de um run LOCAL em 2026-06-15 com os binarios reais no PATH (gitleaks 8.30.1, osv-scanner 2.3.8, zizmor 1.25.2, @size-limit/file 12.1.0). Medicoes: (a) secretFindings=3 via 'gitleaks dir <dir>' por diretorio de fonte (src/open-sse/bin/electron/scripts) APOS corrigir o .gitleaks.toml para [extend].useDefault=true (sem isso o config customizado zerava o ruleset e nunca detectava nada) e a invocacao para escopo por-dir (gitleaks dir aceita 1 path; multiplos caiam para escanear o CWD inteiro/node_modules->timeout). Os 3 sao falsos-positivos do heuristico generic-api-key (string de header beta Anthropic + nomes de coluna latencyP50Ms/latencyP95Ms), a serem allowlistados ao longo do tempo; (b) zizmorFindings=195 via 'npm run check:workflows' APOS migrar .zizmor.yml do schema antigo 'ignores: []' para 'rules: {}' (zizmor 1.25.2 rejeitava o campo 'ignores'); (c) vulnCount=13 (LOW=4/MOD=7/HIGH=2) via osv-scanner; (d) bundleSize=5601 (gzip dos 4 entrypoints bin/*.mjs) via size-limit+@size-limit/file. Todos os 4 sao dedicatedGate:true => SKIP no ratchet BLOQUEANTE (job quality-gate) e ADVISORY no job quality-extended (continue-on-error). Permanecem advisory ate um run VERDE de CI confirmar que a tooling corrigida (install via 'gh release download' em vez de api.github.com nao-autenticado) produz os valores; o flip para bloqueante (remover continue-on-error) fica para um PR de follow-up. Direction:down em todos.",
   "_scanner_remediation_2026_06_15": "Remediacao das findings reais que os scanners semeados acima expuseram (medido localmente em 2026-06-15 com os mesmos binarios). vulnCount 13->10: bump dos 2 HIGH transitivos via package.json overrides — form-data 4.0.5->^4.0.6 (GHSA-hmw2-7cc7-3qxx, via axios) e vite 8.0.5->^8.0.16 (GHSA-fx2h-pf6j-xcff HIGH + GHSA-v6wh-96g9-6wx3 MODERATE, dev-only via vitest/@vitejs/plugin-react/fumadocs-mdx); osv-scanner confirma 0 HIGH restante; build:cli e a suite vitest MCP (16 files/187 testes) verdes pos-bump. zizmorFindings 195->187: env-harden de 7 findings template-injection (ci.yml job i18n; electron-release.yml jobs validate/build/release — o step 'Create source archives' sozinho gerava 4 das 7) movendo cada ${{...}} para 'env:' e referenciando \"$VAR\" no script, + allowlist de 1 dangerous-triggers (deploy-vps.yml on:workflow_run — guardado por conclusion=='success', deploy via SSH sem checkout de codigo nao-confiavel; entry em .zizmor.yml rules.dangerous-triggers.ignore). secretFindings (3) e bundleSize (5601) intocados neste PR. Apertados via edicao manual (direction:down).",
+  "_scanner_flip_blocking_2026_06_16": "Etapa 2: secretFindings (3), zizmorFindings e bundleSize (5601) PROMOVIDOS de ADVISORY para RATCHET BLOQUEANTE. Os 3 scripts (check-secrets/check-workflows/check-bundle-size) ganharam um modo --ratchet que le metrics.<key>.value daqui, compara a contagem MEDIDA e sai 1 SOMENTE numa regressao real (medida > baseline). Sem --ratchet permanecem advisory (exit 0). Qualquer SKIP gracioso (binario ausente, plugin size-limit ausente => fallback-stat/no-build, build nao rodou) sai 0 MESMO com --ratchet — falta de infra nunca bloqueia, so uma regressao medida bloqueia. zizmorFindings re-baselineada 187 -> 192: o +5 e drift LEGITIMO de novos arquivos de workflow (nightly-schemathesis.yml etc.) adicionados no ciclo v3.8.26, mesma convencao @vN unpinned de todos os workflows; reproduzivel localmente E confirmado no run de CI #27593205254 (job 81578109020) = 192. secretFindings (3) e bundleSize (5601) intocados — ja batiam o valor do CI. NB: bundleSize=5601 e o valor GZIP do size-limit + @size-limit/file (instalado por 'npm ci' no CI); o fallback-stat le bytes CRUS (16670, metrica diferente) e por isso o modo --ratchet SO bloqueia quando a medicao veio do size-limit real, fazendo SKIP no fallback. actionlintFindings NAO entra no ratchet (so reportada); o --strict all-or-nothing do check-workflows permanece separado.",
   "_codeql_promote_blocking_2026_06_15": "codeqlAlerts (value 0, direction down) PROMOVIDO de ADVISORY para RATCHET BLOQUEANTE como dedicated gate. CodeQL default-setup esta ON no repo e 'gh api repos/diegosouzapw/OmniRoute/code-scanning/alerts?state=open' retorna 0 alertas abertos (limpo). check-codeql-ratchet.mjs agora le metrics.codeqlAlerts.value, compara e sai 1 SOMENTE numa regressao real (medida > baseline); QUALQUER falha de medicao (gh ausente/sem auth/sem repo/erro de API) e SKIP gracioso com exit 0 — nunca bloqueia por falta de infraestrutura. O step bloqueante vive no job quality-gate (GH_TOKEN + permissions security-events:read); o step advisory duplicado foi removido do quality-extended. Substitui a nota _int_wiring_2026_06_13 que dizia 'codeqlAlerts permanece advisory'.",
   "_metrics_added_2026_06_13_6a11": "openapiCoverage.pct (38.3) e i18nUiCoverage.pct (80.1) promovidas de pisos manuais THRESHOLD para metricas de catraca (direction up) na Task 6A.11. eslintErrors fixado em 0 (era metrica orfa detectada pelo motor v2 da 6A.5).",
   "_int_wiring_2026_06_13": "Fase 7 INT: 3 metricas promovidas de ADVISORY para RATCHET BLOQUEANTE. Valores REAIS medidos em 2026-06-13 no HEAD desta branch: deadExports=327 (knip --reporter json, DEAD_TOTAL=exports+files), cognitiveComplexity=738 (eslint sonarjs/cognitive-complexity via eslint.sonarjs.config.mjs), typeCoveragePct=92.17 (type-coverage --json-output -p open-sse/tsconfig.json). Os scripts check-dead-code.mjs/check-cognitive-complexity.mjs/check-type-coverage.mjs foram convertidos de advisory (exit 0 sempre) para ratchet (exit 1 em regressao). vulnCount e codeqlAlerts permanecem advisory no job quality-extended: dependem de binarios externos (osv-scanner) e token GitHub (gh api) nao disponiveis localmente — nao podem ser medidos/congelados honestamente sem infraestrutura de CI.",
diff --git a/scripts/check/check-bundle-size.mjs b/scripts/check/check-bundle-size.mjs
index 994b0bf3d6..8569a0837a 100644
--- a/scripts/check/check-bundle-size.mjs
+++ b/scripts/check/check-bundle-size.mjs
@@ -16,13 +16,23 @@
 //   arquivos apontados são artefatos gerados), emite `bundleSize=SKIP reason=no-build`
 //   e sai 0.
 //
-// Esta versão é ADVISORY: sempre sai 0 independente do resultado.
-// O ratchet (direction:down) é gerenciado pelo motor de quality-baseline.json na
-// integração com o CI (Task 12 INT).
+// Por default é ADVISORY: sempre sai 0 independente do resultado. Passe --ratchet
+// para tornar BLOQUEANTE: lê metrics.bundleSize.value de
+// config/quality/quality-baseline.json, compara o total MEDIDO e SAI 1 SE — E SOMENTE
+// SE — o medido for MAIOR que o baseline (regressão real, direction:down).
+//
+// IMPORTANTE: o baseline (5601) é o valor GZIP do size-limit + @size-limit/file
+// (instalado por 'npm ci' no CI). O modo FALLBACK-stat lê bytes CRUS (uma métrica
+// DIFERENTE e maior) — comparar fallback-stat contra o baseline gzip seria um falso-
+// positivo. Por isso o --ratchet SÓ bloqueia quando a medição veio do size-limit
+// REAL (plugin presente); o fallback-stat e o no-build são SKIP gracioso (exit 0)
+// mesmo com --ratchet — falta de plugin/build nunca bloqueia, só uma regressão
+// medida na MESMA métrica do baseline bloqueia.
 //
 // Uso:
 //   node scripts/check/check-bundle-size.mjs
-//   node scripts/check/check-bundle-size.mjs --json   (força saída JSON de size-limit se possível)
+//   node scripts/check/check-bundle-size.mjs --json     (força saída JSON de size-limit se possível)
+//   node scripts/check/check-bundle-size.mjs --ratchet   (falha exit 1 numa regressão)
 import fs from "node:fs";
 import path from "node:path";
 import { execFileSync } from "node:child_process";
@@ -31,6 +41,8 @@ import { pathToFileURL, fileURLToPath } from "node:url";
 const ROOT = process.cwd();
 const SIZE_LIMIT_CONFIG = path.join(ROOT, ".size-limit.json");
 const SIZE_LIMIT_BIN = path.join(ROOT, "node_modules", ".bin", "size-limit");
+const BASELINE_PATH = path.join(ROOT, "config/quality/quality-baseline.json");
+const RATCHET = process.argv.includes("--ratchet");
 
 /**
  * Tenta rodar size-limit --json e retorna o array de resultados.
@@ -110,9 +122,7 @@ export function measureViaFileStat(configPath = SIZE_LIMIT_CONFIG, cwd = ROOT) {
   let found = 0;
   const entries = [];
   for (const entry of config) {
-    const entryPath = path.isAbsolute(entry.path)
-      ? entry.path
-      : path.join(cwd, entry.path);
+    const entryPath = path.isAbsolute(entry.path) ? entry.path : path.join(cwd, entry.path);
     if (!fs.existsSync(entryPath)) {
       entries.push({ name: entry.name, path: entry.path, size: null });
       continue;
@@ -125,6 +135,83 @@ export function measureViaFileStat(configPath = SIZE_LIMIT_CONFIG, cwd = ROOT) {
   return { total, entries, allMissing: found === 0 };
 }
 
+// ---------------------------------------------------------------------------
+// Ratchet (direction:down) — exported for tests
+// ---------------------------------------------------------------------------
+
+/**
+ * Avalia o total MEDIDO de bytes contra o baseline.
+ * Direction: down (o tamanho só pode CAIR — maior = regressão).
+ *
+ * @param {number} current  - Total de bytes medido agora (gzip, via size-limit).
+ * @param {number} baseline - Total congelado em quality-baseline.json.
+ * @returns {{ regressed: boolean, improved: boolean }}
+ */
+export function evaluateBundleSizeRatchet(current, baseline) {
+  return {
+    regressed: current > baseline,
+    improved: current < baseline,
+  };
+}
+
+/**
+ * Lê metrics.bundleSize.value do quality-baseline.json.
+ * Retorna null se o arquivo ou a métrica estiverem ausentes (sem baseline não há
+ * ratchet possível — o caller trata como SKIP gracioso, exit 0).
+ *
+ * @param {string} baselinePath
+ * @returns {number|null}
+ */
+export function readBaselineBundleSizeValue(baselinePath = BASELINE_PATH) {
+  if (!fs.existsSync(baselinePath)) return null;
+  let baselineJson;
+  try {
+    baselineJson = JSON.parse(fs.readFileSync(baselinePath, "utf8"));
+  } catch {
+    return null;
+  }
+  const metric = baselineJson?.metrics?.bundleSize;
+  if (!metric || typeof metric.value !== "number") return null;
+  return metric.value;
+}
+
+/**
+ * Aplica o ratchet (direction:down) sobre o total medido vs o baseline.
+ * Sem --ratchet: advisory (exit 0). Com --ratchet + medição comparável (gzip via
+ * size-limit): exit 1 numa regressão real (medido > baseline). Baseline ausente →
+ * SKIP gracioso (exit 0). Define process.exitCode; não lança.
+ *
+ * @param {number} totalBytes - Total MEDIDO pelo size-limit (gzip).
+ */
+function applyRatchet(totalBytes) {
+  if (!RATCHET) {
+    process.exitCode = 0;
+    return;
+  }
+
+  const baselineValue = readBaselineBundleSizeValue(BASELINE_PATH);
+  if (baselineValue === null) {
+    console.log("[bundle-size] --ratchet: baseline ausente (metrics.bundleSize) — SKIP, sai 0.");
+    process.exitCode = 0;
+    return;
+  }
+
+  const { regressed } = evaluateBundleSizeRatchet(totalBytes, baselineValue);
+  if (regressed) {
+    console.error(
+      `[bundle-size] REGRESSÃO — ${totalBytes} bytes > baseline ${baselineValue}.\n` +
+        "  → Reduza o tamanho dos entrypoints, ou re-baseline metrics.bundleSize em\n" +
+        "    config/quality/quality-baseline.json se o crescimento for legítimo e justificado."
+    );
+    process.exitCode = 1;
+    return;
+  }
+  console.log(
+    `[bundle-size] --ratchet OK — ${totalBytes} bytes, baseline ${baselineValue} (sem regressão).`
+  );
+  process.exitCode = 0;
+}
+
 function main() {
   // Step 1: tenta com size-limit + plugin instalado
   let totalBytes = null;
@@ -140,10 +227,13 @@ function main() {
       const { total, entries, allMissing } = measureViaFileStat(SIZE_LIMIT_CONFIG, ROOT);
 
       if (allMissing) {
-        // Step 3: skip gracioso — entradas não existem (build necessário)
+        // Step 3: skip gracioso — entradas não existem (build necessário).
+        // SKIP sai 0 mesmo com --ratchet (build ausente nunca bloqueia).
         console.log("bundleSize=SKIP reason=no-build");
         if (process.env.CI) {
-          console.log("::notice::check-bundle-size skipped — entradas do .size-limit.json não encontradas (build necessário)");
+          console.log(
+            "::notice::check-bundle-size skipped — entradas do .size-limit.json não encontradas (build necessário)"
+          );
         }
         return;
       }
@@ -158,7 +248,8 @@ function main() {
         }
       }
     } else {
-      // Erro inesperado — reporta mas não falha (advisory)
+      // Erro inesperado — reporta mas não falha (advisory).
+      // SKIP sai 0 mesmo com --ratchet (erro de medição nunca bloqueia).
       console.error(`[bundle-size] Aviso: size-limit retornou erro inesperado: ${err.message}`);
       console.log("bundleSize=SKIP reason=size-limit-error");
       return;
@@ -167,7 +258,28 @@ function main() {
 
   const kb = (totalBytes / 1024).toFixed(2);
   console.log(`bundleSize=${totalBytes}`);
-  console.log(`[bundle-size] ${mode}: total ${kb} KB (${totalBytes} bytes) — advisory, saindo 0`);
+
+  // O ratchet só pode comparar a MESMA métrica que congelou o baseline (gzip via
+  // size-limit + @size-limit/file). O fallback-stat lê bytes CRUS — uma métrica
+  // diferente e maior — então com --ratchet ele faz SKIP gracioso (exit 0) em vez
+  // de um falso-positivo. Sem --ratchet, ambos os modos só reportam (advisory).
+  if (mode !== "size-limit") {
+    if (RATCHET) {
+      console.log(
+        `[bundle-size] ${mode}: total ${kb} KB (${totalBytes} bytes) — ` +
+          "--ratchet SKIP (medição não-comparável ao baseline gzip; instale @size-limit/file)."
+      );
+      process.exitCode = 0;
+      return;
+    }
+    console.log(`[bundle-size] ${mode}: total ${kb} KB (${totalBytes} bytes) — advisory, saindo 0`);
+    return;
+  }
+
+  if (!RATCHET) {
+    console.log(`[bundle-size] ${mode}: total ${kb} KB (${totalBytes} bytes) — advisory, saindo 0`);
+  }
+  applyRatchet(totalBytes);
 }
 
 if (import.meta.url === pathToFileURL(process.argv[1] || "").href) main();
diff --git a/scripts/check/check-secrets.mjs b/scripts/check/check-secrets.mjs
index b61c7ac478..5b1829b320 100644
--- a/scripts/check/check-secrets.mjs
+++ b/scripts/check/check-secrets.mjs
@@ -10,13 +10,18 @@
 //   secretFindings=N      — número de findings do gitleaks
 //   secretFindings=SKIP reason=binary-absent   — gitleaks não está no PATH
 //
-// Esta versão é ADVISORY (sai 0 sempre). O ratchet (direction:down) é gerenciado
-// pelo motor quality-baseline.json no CI (Task 7.18 INT).
+// Por default é ADVISORY (sai 0 sempre). Passe --ratchet para tornar BLOQUEANTE:
+// lê metrics.secretFindings.value de config/quality/quality-baseline.json, compara
+// a contagem MEDIDA e SAI 1 SE — E SOMENTE SE — a medida for MAIOR que o baseline
+// (regressão real, direction:down). Qualquer SKIP gracioso (binário ausente, nenhum
+// dir de fonte) SAI 0 mesmo com --ratchet — falta de infraestrutura nunca bloqueia,
+// só uma regressão medida bloqueia.
 //
 // Uso:
 //   node scripts/check/check-secrets.mjs
-//   node scripts/check/check-secrets.mjs --json    # imprime JSON bruto do gitleaks
-//   node scripts/check/check-secrets.mjs --quiet   # suprime logs de diagnóstico
+//   node scripts/check/check-secrets.mjs --json     # imprime JSON bruto do gitleaks
+//   node scripts/check/check-secrets.mjs --quiet    # suprime logs de diagnóstico
+//   node scripts/check/check-secrets.mjs --ratchet   # falha (exit 1) numa regressão
 
 import fs from "node:fs";
 import { execFileSync, spawnSync } from "node:child_process";
@@ -26,7 +31,9 @@ import { pathToFileURL } from "node:url";
 const ROOT = process.cwd();
 const QUIET = process.argv.includes("--quiet");
 const PRINT_JSON = process.argv.includes("--json");
+const RATCHET = process.argv.includes("--ratchet");
 const GITLEAKS_CONFIG = path.join(ROOT, ".gitleaks.toml");
+const BASELINE_PATH = path.join(ROOT, "config/quality/quality-baseline.json");
 
 // Source directories to scan for secrets. We deliberately scope to the
 // production/source trees instead of scanning the whole working dir:
@@ -105,6 +112,46 @@ export function parseGitleaksJson(gitleaksJson) {
   return { findingCount, byRule, byFile };
 }
 
+// ---------------------------------------------------------------------------
+// Ratchet (direction:down) — exported for tests
+// ---------------------------------------------------------------------------
+
+/**
+ * Avalia a contagem MEDIDA de secrets contra o baseline.
+ * Direction: down (a contagem só pode CAIR — mais secrets = regressão).
+ *
+ * @param {number} current  - Contagem de findings medida agora.
+ * @param {number} baseline - Contagem congelada em quality-baseline.json.
+ * @returns {{ regressed: boolean, improved: boolean }}
+ */
+export function evaluateSecretsRatchet(current, baseline) {
+  return {
+    regressed: current > baseline,
+    improved: current < baseline,
+  };
+}
+
+/**
+ * Lê metrics.secretFindings.value do quality-baseline.json.
+ * Retorna null se o arquivo ou a métrica estiverem ausentes (sem baseline não há
+ * ratchet possível — o caller trata como SKIP gracioso, exit 0).
+ *
+ * @param {string} baselinePath
+ * @returns {number|null}
+ */
+export function readBaselineSecretsValue(baselinePath = BASELINE_PATH) {
+  if (!fs.existsSync(baselinePath)) return null;
+  let baselineJson;
+  try {
+    baselineJson = JSON.parse(fs.readFileSync(baselinePath, "utf8"));
+  } catch {
+    return null;
+  }
+  const metric = baselineJson?.metrics?.secretFindings;
+  if (!metric || typeof metric.value !== "number") return null;
+  return metric.value;
+}
+
 // ---------------------------------------------------------------------------
 // Binary detection
 // ---------------------------------------------------------------------------
@@ -156,7 +203,7 @@ function main() {
       process.stderr.write(
         "[check-secrets] SKIP — gitleaks não encontrado no PATH.\n" +
           "[check-secrets] Instale via: https://github.com/gitleaks/gitleaks\n" +
-          "[check-secrets] ADVISORY — este gate sai 0 (ratchet entra no CI da Fase 7 INT).\n"
+          "[check-secrets] SKIP gracioso — sai 0 mesmo com --ratchet (binário ausente nunca bloqueia).\n"
       );
     }
     process.exitCode = 0;
@@ -271,12 +318,57 @@ function main() {
     } else {
       process.stderr.write("[check-secrets] Nenhum finding detectado.\n");
     }
-    process.stderr.write(
-      "[check-secrets] ADVISORY — esta versão não falha pela contagem (ratchet entra no CI).\n"
-    );
   }
 
-  // Sai 0 sempre nesta versão (advisory)
+  // Medição bem-sucedida → aplica o ratchet (bloqueante só com --ratchet).
+  applyRatchet(findingCount);
+}
+
+/**
+ * Aplica o ratchet (direction:down) sobre a contagem medida vs o baseline.
+ * Sem --ratchet: advisory (exit 0). Com --ratchet: exit 1 numa regressão real
+ * (medida > baseline). Baseline ausente → SKIP gracioso (exit 0).
+ *
+ * @param {number} findingCount - Contagem MEDIDA (medição bem-sucedida).
+ */
+function applyRatchet(findingCount) {
+  if (!RATCHET) {
+    if (!QUIET) {
+      process.stderr.write(
+        "[check-secrets] ADVISORY — não falha pela contagem (passe --ratchet para bloquear regressão).\n"
+      );
+    }
+    process.exitCode = 0;
+    return;
+  }
+
+  const baselineValue = readBaselineSecretsValue(BASELINE_PATH);
+  if (baselineValue === null) {
+    if (!QUIET) {
+      process.stderr.write(
+        "[check-secrets] baseline ausente (metrics.secretFindings) — SKIP gracioso, sai 0.\n"
+      );
+    }
+    process.exitCode = 0;
+    return;
+  }
+
+  const { regressed } = evaluateSecretsRatchet(findingCount, baselineValue);
+  if (regressed) {
+    process.stderr.write(
+      `[check-secrets] REGRESSÃO — ${findingCount} secret findings > baseline ${baselineValue}\n` +
+        "  → Remova o novo secret (ou allowliste em .gitleaks.toml se for falso-positivo legítimo),\n" +
+        "    depois re-baseline metrics.secretFindings em config/quality/quality-baseline.json.\n"
+    );
+    process.exitCode = 1;
+    return;
+  }
+
+  if (!QUIET) {
+    process.stderr.write(
+      `[check-secrets] OK — sem regressão (${findingCount} findings, baseline ${baselineValue}).\n`
+    );
+  }
   process.exitCode = 0;
 }
 
diff --git a/scripts/check/check-workflows.mjs b/scripts/check/check-workflows.mjs
index 194427eeed..5887134ecb 100644
--- a/scripts/check/check-workflows.mjs
+++ b/scripts/check/check-workflows.mjs
@@ -20,12 +20,22 @@
 //   zizmorFindings=<n>     — findings from zizmor alone
 //
 // Exit codes:
-//   0  — SKIP (binary absent) or all tools passed (0 findings each)
-//   1  — one or more findings (gate failure; advisory mode = always 0; see --advisory)
+//   0  — SKIP (binary absent) or all tools passed / no ratchet regression
+//   1  — gate failure: --strict + any finding, OR --ratchet + zizmorFindings
+//        regression (measured > baseline)
+//
+// Ratchet mode (--ratchet): reads metrics.zizmorFindings.value from
+// config/quality/quality-baseline.json and exits 1 IF — AND ONLY IF — the MEASURED
+// zizmor count is GREATER than the baseline (real regression, direction:down).
+// ONLY zizmorFindings is ratcheted; actionlint findings are REPORTED but NOT
+// ratcheted (use the separate --strict all-or-nothing flag for those). Any graceful
+// SKIP (binary absent, no workflows) exits 0 even with --ratchet — missing infra
+// never blocks, only a measured regression does.
 //
 // Usage:
 //   node scripts/check/check-workflows.mjs               # advisory (exit 0 always)
 //   node scripts/check/check-workflows.mjs --strict      # fail on any finding
+//   node scripts/check/check-workflows.mjs --ratchet     # fail on zizmor regression
 //   node scripts/check/check-workflows.mjs --quiet       # suppress progress logs
 
 import { execFileSync, spawnSync } from "node:child_process";
@@ -36,8 +46,10 @@ import { pathToFileURL } from "node:url";
 const ROOT = process.cwd();
 const WORKFLOWS_DIR = path.join(ROOT, ".github", "workflows");
 const ZIZMOR_CONFIG = path.join(ROOT, ".zizmor.yml");
+const BASELINE_PATH = path.join(ROOT, "config/quality/quality-baseline.json");
 
 const STRICT = process.argv.includes("--strict");
+const RATCHET = process.argv.includes("--ratchet");
 const QUIET = process.argv.includes("--quiet");
 
 // ---------------------------------------------------------------------------
@@ -129,6 +141,46 @@ export function parseZizmorOutput(stdout) {
   }
 }
 
+// ---------------------------------------------------------------------------
+// Ratchet (direction:down, zizmorFindings only) — exported for tests
+// ---------------------------------------------------------------------------
+
+/**
+ * Evaluates the MEASURED zizmor finding count against the baseline.
+ * Direction: down (the count may only DROP — more findings = regression).
+ *
+ * @param {number} current  - Measured zizmor finding count.
+ * @param {number} baseline - Frozen count in quality-baseline.json.
+ * @returns {{ regressed: boolean, improved: boolean }}
+ */
+export function evaluateZizmorRatchet(current, baseline) {
+  return {
+    regressed: current > baseline,
+    improved: current < baseline,
+  };
+}
+
+/**
+ * Reads metrics.zizmorFindings.value from quality-baseline.json.
+ * Returns null when the file or metric is missing (no baseline → no ratchet
+ * possible; the caller treats this as a graceful SKIP, exit 0).
+ *
+ * @param {string} baselinePath
+ * @returns {number|null}
+ */
+export function readBaselineZizmorValue(baselinePath = BASELINE_PATH) {
+  if (!fs.existsSync(baselinePath)) return null;
+  let baselineJson;
+  try {
+    baselineJson = JSON.parse(fs.readFileSync(baselinePath, "utf8"));
+  } catch {
+    return null;
+  }
+  const metric = baselineJson?.metrics?.zizmorFindings;
+  if (!metric || typeof metric.value !== "number") return null;
+  return metric.value;
+}
+
 // ---------------------------------------------------------------------------
 // Runner helpers
 // ---------------------------------------------------------------------------
@@ -216,7 +268,7 @@ function main() {
         "  Install them to enable workflow linting and security audit:\n" +
         "  • actionlint: https://github.com/rhysd/actionlint\n" +
         "  • zizmor:     https://github.com/woodruffw/zizmor\n" +
-        "  This gate is advisory — the build is not blocked."
+        "  Graceful SKIP — exits 0 even with --ratchet (missing binaries never block)."
     );
     process.stdout.write("workflowFindings=SKIP\n");
     process.exit(0);
@@ -226,7 +278,9 @@ function main() {
 
   if (workflowFiles.length === 0) {
     if (!QUIET) {
-      console.log(`[check-workflows] No workflow files found in ${WORKFLOWS_DIR} — nothing to check.`);
+      console.log(
+        `[check-workflows] No workflow files found in ${WORKFLOWS_DIR} — nothing to check.`
+      );
     }
     process.stdout.write("workflowFindings=0\nactionlintFindings=0\nzizmorFindings=0\n");
     process.exit(0);
@@ -285,16 +339,56 @@ function main() {
   process.stdout.write(`zizmorFindings=${zizmorCount}\n`);
 
   if (STRICT && total > 0) {
-    console.error(
-      `\n[check-workflows] FAIL — ${total} workflow finding(s) total (--strict mode).`
-    );
+    console.error(`\n[check-workflows] FAIL — ${total} workflow finding(s) total (--strict mode).`);
     process.exit(1);
   }
 
+  // ── ratchet (zizmorFindings only, direction:down) ──────────────────────────
+  // We can only ratchet zizmor when zizmor actually RAN (binary present). If
+  // zizmor is absent we have no comparable measurement → graceful SKIP (exit 0):
+  // a missing binary must never block, only a measured regression does.
+  if (RATCHET) {
+    if (!hasZizmor) {
+      if (!QUIET) {
+        process.stderr.write(
+          "[check-workflows] --ratchet: zizmor absent — SKIP (no measurement, never blocks).\n"
+        );
+      }
+      process.exit(0);
+    }
+
+    const baselineValue = readBaselineZizmorValue(BASELINE_PATH);
+    if (baselineValue === null) {
+      if (!QUIET) {
+        process.stderr.write(
+          "[check-workflows] --ratchet: baseline absent (metrics.zizmorFindings) — SKIP, exit 0.\n"
+        );
+      }
+      process.exit(0);
+    }
+
+    const { regressed } = evaluateZizmorRatchet(zizmorCount, baselineValue);
+    if (regressed) {
+      console.error(
+        `\n[check-workflows] REGRESSION — ${zizmorCount} zizmor finding(s) > baseline ${baselineValue}.\n` +
+          "  → Fix the new workflow finding(s), or re-baseline metrics.zizmorFindings in\n" +
+          "    config/quality/quality-baseline.json if the rise is a legitimate, justified drift.\n" +
+          "  (actionlint findings are reported, not ratcheted — use --strict for those.)"
+      );
+      process.exit(1);
+    }
+    if (!QUIET) {
+      process.stderr.write(
+        `[check-workflows] --ratchet OK — ${zizmorCount} zizmor finding(s), baseline ${baselineValue} (no regression).\n`
+      );
+    }
+    process.exit(0);
+  }
+
   if (total > 0 && !QUIET) {
     console.log(
       `[check-workflows] ADVISORY — ${total} finding(s) detected. ` +
-        "Pass --strict to block the gate."
+        "Pass --strict to block on any finding, or --ratchet to block on a zizmor regression."
     );
   }
 
diff --git a/tests/unit/build/check-bundle-size.test.ts b/tests/unit/build/check-bundle-size.test.ts
index 1d5e7f893b..35b9f63884 100644
--- a/tests/unit/build/check-bundle-size.test.ts
+++ b/tests/unit/build/check-bundle-size.test.ts
@@ -3,13 +3,22 @@ import assert from "node:assert/strict";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
-// @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
 import {
   parseSizeLimitResults,
   measureViaFileStat,
   runSizeLimit,
+  evaluateBundleSizeRatchet,
+  readBaselineBundleSizeValue,
+  // @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
 } from "../../../scripts/check/check-bundle-size.mjs";
 
+type RatchetVerdict = { regressed: boolean; improved: boolean };
+const evaluateSize = evaluateBundleSizeRatchet as (
+  current: number,
+  baseline: number
+) => RatchetVerdict;
+const readSizeBaseline = readBaselineBundleSizeValue as (p?: string) => number | null;
+
 // ---------------------------------------------------------------------------
 // parseSizeLimitResults
 // ---------------------------------------------------------------------------
@@ -123,7 +132,10 @@ test("measureViaFileStat: soma múltiplos arquivos existentes", () => {
 });
 
 test("measureViaFileStat: config ausente retorna allMissing=true e total=0", () => {
-  const { total, entries, allMissing } = measureViaFileStat("/tmp/nonexistent/.size-limit.json", "/tmp");
+  const { total, entries, allMissing } = measureViaFileStat(
+    "/tmp/nonexistent/.size-limit.json",
+    "/tmp"
+  );
   assert.equal(total, 0);
   assert.equal(allMissing, true);
   assert.deepEqual(entries, []);
@@ -143,3 +155,75 @@ test("runSizeLimit: lança com code SL_NO_BIN quando binário não existe", () =
     }
   );
 });
+
+// ---------------------------------------------------------------------------
+// evaluateBundleSizeRatchet — ratchet direction:down (Etapa 2: flip to blocking)
+// Regression when measured > baseline; baseline=5601 (gzip via @size-limit/file).
+// ---------------------------------------------------------------------------
+
+test("evaluateBundleSizeRatchet: medido == baseline passa (5601 vs 5601)", () => {
+  const r = evaluateSize(5601, 5601);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, false);
+});
+
+test("evaluateBundleSizeRatchet: um byte a mais que o baseline é regressão", () => {
+  const r = evaluateSize(5602, 5601);
+  assert.equal(r.regressed, true, "any size increase must block");
+  assert.equal(r.improved, false);
+});
+
+test("evaluateBundleSizeRatchet: menor que o baseline é melhoria", () => {
+  const r = evaluateSize(5000, 5601);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, true);
+});
+
+test("evaluateBundleSizeRatchet: comparação inteira estrita — qualquer aumento regride", () => {
+  assert.equal(evaluateSize(5602, 5601).regressed, true);
+  assert.equal(evaluateSize(5601, 5601).regressed, false);
+  assert.equal(evaluateSize(5600, 5601).regressed, false);
+});
+
+// ---------------------------------------------------------------------------
+// readBaselineBundleSizeValue — leitura tolerante do quality-baseline.json
+// ---------------------------------------------------------------------------
+
+function withTmpBundleBaseline(content: string | null, fn: (p: string) => void) {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "bundle-baseline-"));
+  const p = path.join(dir, "quality-baseline.json");
+  if (content !== null) fs.writeFileSync(p, content);
+  try {
+    fn(p);
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+}
+
+test("readBaselineBundleSizeValue: lê metrics.bundleSize.value", () => {
+  withTmpBundleBaseline(JSON.stringify({ metrics: { bundleSize: { value: 5601 } } }), (p) => {
+    assert.equal(readSizeBaseline(p), 5601);
+  });
+});
+
+test("readBaselineBundleSizeValue: arquivo ausente retorna null (SKIP gracioso)", () => {
+  assert.equal(readSizeBaseline("/tmp/does-not-exist-77777/quality-baseline.json"), null);
+});
+
+test("readBaselineBundleSizeValue: métrica ausente retorna null", () => {
+  withTmpBundleBaseline(JSON.stringify({ metrics: {} }), (p) => {
+    assert.equal(readSizeBaseline(p), null);
+  });
+});
+
+test("readBaselineBundleSizeValue: value não-numérico retorna null", () => {
+  withTmpBundleBaseline(JSON.stringify({ metrics: { bundleSize: { value: "5601" } } }), (p) => {
+    assert.equal(readSizeBaseline(p), null);
+  });
+});
+
+test("readBaselineBundleSizeValue: JSON inválido retorna null (não lança)", () => {
+  withTmpBundleBaseline("not json at all", (p) => {
+    assert.equal(readSizeBaseline(p), null);
+  });
+});
diff --git a/tests/unit/build/check-secrets.test.ts b/tests/unit/build/check-secrets.test.ts
index 3219d99482..9b5ce23f71 100644
--- a/tests/unit/build/check-secrets.test.ts
+++ b/tests/unit/build/check-secrets.test.ts
@@ -6,21 +6,34 @@
 //   - parseGitleaksJson() — parses gitleaks findings array
 import test from "node:test";
 import assert from "node:assert/strict";
-// @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
-import { parseGitleaksJson } from "../../../scripts/check/check-secrets.mjs";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import {
+  parseGitleaksJson,
+  evaluateSecretsRatchet,
+  readBaselineSecretsValue,
+  // @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
+} from "../../../scripts/check/check-secrets.mjs";
+
+type RatchetVerdict = { regressed: boolean; improved: boolean };
+const evaluate = evaluateSecretsRatchet as (current: number, baseline: number) => RatchetVerdict;
+const readBaseline = readBaselineSecretsValue as (p?: string) => number | null;
 
 // ---------------------------------------------------------------------------
 // Fixtures — synthetic gitleaks --report-format json output
 // ---------------------------------------------------------------------------
 
 /** Helper to build a minimal gitleaks finding. */
-function makeFinding(overrides: {
-  ruleId?: string;
-  file?: string;
-  description?: string;
-  startLine?: number;
-  secret?: string;
-} = {}) {
+function makeFinding(
+  overrides: {
+    ruleId?: string;
+    file?: string;
+    description?: string;
+    startLine?: number;
+    secret?: string;
+  } = {}
+) {
   return {
     Description: overrides.description ?? "GitHub Personal Access Token",
     StartLine: overrides.startLine ?? 42,
@@ -178,11 +191,9 @@ test("parseGitleaksJson: suporta campo file (camelCase) como fallback", () => {
 // ---------------------------------------------------------------------------
 
 test("parseGitleaksJson: entradas null dentro do array são ignoradas", () => {
-  const findings = [
-    makeFinding(),
-    null,
-    makeFinding({ ruleId: "aws-access-key" }),
-  ] as (ReturnType<typeof makeFinding> | null)[];
+  const findings = [makeFinding(), null, makeFinding({ ruleId: "aws-access-key" })] as (ReturnType<
+    typeof makeFinding
+  > | null)[];
   const result = parseGitleaksJson(findings as unknown as ReturnType<typeof makeFinding>[]);
   assert.equal(result.findingCount, 2, "null entries should be skipped");
 });
@@ -240,3 +251,81 @@ test("parseGitleaksJson: findingCount == soma de todos os byFile values", () =>
   const sumByFile = Object.values(result.byFile).reduce((s, n) => s + n, 0);
   assert.equal(result.findingCount, sumByFile, "findingCount must equal sum of byFile counts");
 });
+
+// ---------------------------------------------------------------------------
+// evaluateSecretsRatchet — ratchet direction:down (Etapa 2: flip to blocking)
+// Regression when measured > baseline; baseline=3 → 4+ findings block, 3 passes.
+// ---------------------------------------------------------------------------
+
+test("evaluateSecretsRatchet: medida == baseline passa (3 vs 3)", () => {
+  const r = evaluate(3, 3);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, false);
+});
+
+test("evaluateSecretsRatchet: uma a mais que o baseline é regressão (4 vs 3)", () => {
+  const r = evaluate(4, 3);
+  assert.equal(r.regressed, true, "a single new secret finding must block");
+  assert.equal(r.improved, false);
+});
+
+test("evaluateSecretsRatchet: menos que o baseline é melhoria", () => {
+  const r = evaluate(1, 3);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, true);
+});
+
+test("evaluateSecretsRatchet: zero contra baseline não-zero é melhoria máxima", () => {
+  const r = evaluate(0, 5);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, true);
+});
+
+test("evaluateSecretsRatchet: comparação inteira estrita — qualquer aumento regride", () => {
+  assert.equal(evaluate(6, 5).regressed, true);
+  assert.equal(evaluate(5, 5).regressed, false);
+  assert.equal(evaluate(4, 5).regressed, false);
+});
+
+// ---------------------------------------------------------------------------
+// readBaselineSecretsValue — leitura tolerante do quality-baseline.json
+// ---------------------------------------------------------------------------
+
+function withTmpBaseline(content: string | null, fn: (p: string) => void) {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "secrets-baseline-"));
+  const p = path.join(dir, "quality-baseline.json");
+  if (content !== null) fs.writeFileSync(p, content);
+  try {
+    fn(p);
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+}
+
+test("readBaselineSecretsValue: lê metrics.secretFindings.value", () => {
+  withTmpBaseline(JSON.stringify({ metrics: { secretFindings: { value: 3 } } }), (p) => {
+    assert.equal(readBaseline(p), 3);
+  });
+});
+
+test("readBaselineSecretsValue: arquivo ausente retorna null (SKIP gracioso)", () => {
+  assert.equal(readBaseline("/tmp/does-not-exist-99999/quality-baseline.json"), null);
+});
+
+test("readBaselineSecretsValue: métrica ausente retorna null", () => {
+  withTmpBaseline(JSON.stringify({ metrics: {} }), (p) => {
+    assert.equal(readBaseline(p), null);
+  });
+});
+
+test("readBaselineSecretsValue: value não-numérico retorna null", () => {
+  withTmpBaseline(JSON.stringify({ metrics: { secretFindings: { value: "3" } } }), (p) => {
+    assert.equal(readBaseline(p), null);
+  });
+});
+
+test("readBaselineSecretsValue: JSON inválido retorna null (não lança)", () => {
+  withTmpBaseline("{ not valid json", (p) => {
+    assert.equal(readBaseline(p), null);
+  });
+});
diff --git a/tests/unit/build/check-workflows.test.ts b/tests/unit/build/check-workflows.test.ts
index 7939bc75bd..19b27ae798 100644
--- a/tests/unit/build/check-workflows.test.ts
+++ b/tests/unit/build/check-workflows.test.ts
@@ -17,14 +17,23 @@ import assert from "node:assert/strict";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
-// @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
 import {
   parseActionlintOutput,
   parseZizmorOutput,
   collectWorkflowFiles,
   isBinaryAvailable,
+  evaluateZizmorRatchet,
+  readBaselineZizmorValue,
+  // @ts-expect-error — .mjs helper has no type declarations; runtime shape is known.
 } from "../../../scripts/check/check-workflows.mjs";
 
+type RatchetVerdict = { regressed: boolean; improved: boolean };
+const evaluateZizmor = evaluateZizmorRatchet as (
+  current: number,
+  baseline: number
+) => RatchetVerdict;
+const readZizmorBaseline = readBaselineZizmorValue as (p?: string) => number | null;
+
 // ─────────────────────────────────────────────────────────────────────────────
 // parseActionlintOutput
 // ─────────────────────────────────────────────────────────────────────────────
@@ -52,7 +61,7 @@ test("parseActionlintOutput: one finding line returns count=1", () => {
 
 test("parseActionlintOutput: multiple finding lines returns correct count", () => {
   const stdout = [
-    ".github/workflows/ci.yml:5:1: \"on\" is the key of workflow trigger. Use quoted \"on\" [syntax-check]",
+    '.github/workflows/ci.yml:5:1: "on" is the key of workflow trigger. Use quoted "on" [syntax-check]',
     ".github/workflows/ci.yml:42:9: event name 'pull_request' is not available for 'workflow_dispatch' [events]",
     ".github/workflows/deploy.yml:8:5: unknown key 'runs-ons' in step config [syntax-check]",
   ].join("\n");
@@ -91,7 +100,11 @@ test("parseZizmorOutput: JSON with empty diagnostics array returns count=0", ()
 
 test("parseZizmorOutput: JSON { diagnostics: [...] } counts correctly", () => {
   const diagnostics = [
-    { id: "unpinned-uses", severity: "medium", message: "uses: actions/checkout@v4 is not pinned to a SHA" },
+    {
+      id: "unpinned-uses",
+      severity: "medium",
+      message: "uses: actions/checkout@v4 is not pinned to a SHA",
+    },
     { id: "script-injection", severity: "high", message: "Untrusted input in run step" },
   ];
   const result = parseZizmorOutput(JSON.stringify({ diagnostics }));
@@ -223,3 +236,75 @@ test("isBinaryAvailable: node is available (sanity check for test environment)",
   // node must be in PATH for this test suite to even run.
   assert.equal(isBinaryAvailable("node"), true);
 });
+
+// ─────────────────────────────────────────────────────────────────────────────
+// evaluateZizmorRatchet — ratchet direction:down, zizmorFindings ONLY (Etapa 2)
+// Regression when measured > baseline. actionlint is reported, not ratcheted.
+// ─────────────────────────────────────────────────────────────────────────────
+
+test("evaluateZizmorRatchet: measured == baseline passes (192 vs 192)", () => {
+  const r = evaluateZizmor(192, 192);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, false);
+});
+
+test("evaluateZizmorRatchet: one more than baseline is a regression (193 vs 192)", () => {
+  const r = evaluateZizmor(193, 192);
+  assert.equal(r.regressed, true, "a single new zizmor finding must block");
+  assert.equal(r.improved, false);
+});
+
+test("evaluateZizmorRatchet: fewer than baseline is an improvement (190 vs 192)", () => {
+  const r = evaluateZizmor(190, 192);
+  assert.equal(r.regressed, false);
+  assert.equal(r.improved, true);
+});
+
+test("evaluateZizmorRatchet: strict integer comparison — any increase regresses", () => {
+  assert.equal(evaluateZizmor(193, 192).regressed, true);
+  assert.equal(evaluateZizmor(192, 192).regressed, false);
+  assert.equal(evaluateZizmor(191, 192).regressed, false);
+});
+
+// ─────────────────────────────────────────────────────────────────────────────
+// readBaselineZizmorValue — tolerant read of quality-baseline.json
+// ─────────────────────────────────────────────────────────────────────────────
+
+function withTmpBaseline(content: string | null, fn: (p: string) => void) {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "workflows-baseline-"));
+  const p = path.join(dir, "quality-baseline.json");
+  if (content !== null) fs.writeFileSync(p, content);
+  try {
+    fn(p);
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+}
+
+test("readBaselineZizmorValue: reads metrics.zizmorFindings.value", () => {
+  withTmpBaseline(JSON.stringify({ metrics: { zizmorFindings: { value: 192 } } }), (p) => {
+    assert.equal(readZizmorBaseline(p), 192);
+  });
+});
+
+test("readBaselineZizmorValue: missing file returns null (graceful SKIP)", () => {
+  assert.equal(readZizmorBaseline("/tmp/does-not-exist-88888/quality-baseline.json"), null);
+});
+
+test("readBaselineZizmorValue: missing metric returns null", () => {
+  withTmpBaseline(JSON.stringify({ metrics: {} }), (p) => {
+    assert.equal(readZizmorBaseline(p), null);
+  });
+});
+
+test("readBaselineZizmorValue: non-numeric value returns null", () => {
+  withTmpBaseline(JSON.stringify({ metrics: { zizmorFindings: { value: "192" } } }), (p) => {
+    assert.equal(readZizmorBaseline(p), null);
+  });
+});
+
+test("readBaselineZizmorValue: invalid JSON returns null (does not throw)", () => {
+  withTmpBaseline("{ broken", (p) => {
+    assert.equal(readZizmorBaseline(p), null);
+  });
+});