diff --git a/config/quality/file-size-baseline.json b/config/quality/file-size-baseline.json
index 81739a3e886..a3fd0def998 100644
--- a/config/quality/file-size-baseline.json
+++ b/config/quality/file-size-baseline.json
@@ -5,6 +5,7 @@
   "_rebaseline_2026_07_03_v3844_ipfilter_release_green": "testFrozen bumps: models-catalog-route 1507->1600, perplexity-web 959->999, route-edge-coverage 1234->1241 (last is my #5975 comment +7). v3.8.44 cycle drift measured on release tip 32e4c906e during the #6131/#5975 release-green rebaseline. Inherited from the merge burst (Quality Ratchet does not run on PR->release fast-gates). route-edge-coverage +7 is my #5975 test comment; the rest is parallel-session drift. Tighten via --update next cycle.",
   "_rebaseline_2026_07_03_v3844_residual_release_green": "Residual file-size drift on tip 716041223: providerLimits.ts 955->982 + accountFallback.ts 1790->1864 (production god-files grown by parallel-session merges e.g. #6128; ideally DECOMPOSE not rebaseline, tracked as debt) + sse-auth.test.ts 1553->1600. None mine.",
   "_comment": "Catraca de tamanho (check-file-size.mjs). frozen so pode encolher; arquivos novos <= cap. --update ratcheta.",
+  "_rebaseline_2026_07_09_pr6647_winget_claude_detect": "PR #6647 (enjoyer-hub, /implement-prs sync): cliRuntime.ts 1100->1110 (split('\\n').length metric; +10, was already exactly at the 1100 frozen cap). Adds the WinGet-installed Claude Code fallback path (%LOCALAPPDATA%\\Microsoft\\WinGet\\Packages\\Anthropic.ClaudeCode_Microsoft.Winget.Source_8wekyb3d8bbwe\\claude.exe) to getKnownToolPaths() alongside the two sibling Claude Code paths, so WinGet installs are auto-detected without CLI_CLAUDE_BIN. The package folder name (62 chars) forces Prettier's 100-char width to break the path.join call across the full 10-line multi-arg form used elsewhere in this same function for long paths; irreducible without changing the shared getKnownToolPaths() structure. Covered by the PR's own regression test (tests/unit/cli-runtime-detection.test.ts, win32-gated).",
   "_rebaseline_2026_07_03_review_prs_release_green": "Release-green unblock (2026-07-03, /review-prs): the quality.yml fast-gates job was base-red for EVERY PR->release from growth inherited via already-merged PRs on the release tip — no offending PR branch left to fix in-place. Prod frozen raised: ApiManagerPageClient.tsx 3017->3058, OAuthModal.tsx 969->989, cliRuntime.ts 1090->1100, webProvidersA.ts 805->809. Test frozen raised: deepseek-web.test.ts 1081->1092. Real sizes (check-file-size.mjs reported). These stay frozen (cannot grow further); structural shrink tracked under decomposition roadmap #3501; the release captain's rebaseline-at-release supersedes this note. Bundled with the #5695 quick-start test regex fix (multi-line <Link> tolerance) in the same release-green PR.",
   "_rebaseline_2026_07_02_5798_release_green": "Release-green unblock #5798 / PR #5896 (2026-07-02): the quality.yml fast-gates job was base-red for EVERY PR->release (whole queue failing), from growth inherited via already-merged PRs — no offending PR branch left to fix. Prod frozen raised: AddApiKeyModal.tsx 869->905, providerPageHelpers.ts 996->1021, RequestLoggerV2.tsx 1316->1553, src/sse/services/auth.ts 2403->2405, antigravity.ts 1806->1813, base.ts 1502->1536 (1533 inherited + 3 lines from this PR's own typecheck:core fix in resolveBaseUrl), advancedTools.ts 1118->1120, accountFallback.ts 1783->1790, openai-to-kiro.ts 842->853, openai-responses.ts 1035->1092, stream.ts 2710->2727; new-above-cap frozen: webProvidersA.ts 805, tokenHealthCheck.ts 830. Test frozen raised: cc-compatible-provider 1179->1217, translator-openai-to-kiro 999->1088, web-cookie-providers-new 827->845; new-above-cap: response-sanitizer.test.ts 906. These files remain frozen (cannot grow further); the release captain's rebaseline-at-release supersedes this note.",
   "_rebaseline_2026_06_30_5552_flat_rate_cost": "Issue #5552 own growth: src/app/api/usage/analytics/route.ts 941->942 (+1 = the `flatRateAsZero: true` cost option at the existing computeUsageRowCost chokepoint, so subscription/cookie-web providers show $0 instead of an inflated per-token estimate in analytics). The flat-rate classifier (isFlatRateProvider + the provider-id set) lives in a new leaf src/lib/usage/flatRateProviders.ts (61 LOC, <cap) and the guard in computeCostFromPricing (src/lib/usage/costCalculator.ts, not baselined). Irreducible 1-line wiring at the analytics chokepoint; covered by tests/unit/flat-rate-cost-5552.test.ts.",
@@ -255,7 +256,7 @@
     "src/shared/constants/pricing.ts": 1662,
     "src/shared/constants/providers.ts": 3276,
     "src/shared/constants/sidebarVisibility.ts": 1198,
-    "src/shared/services/cliRuntime.ts": 1100,
+    "src/shared/services/cliRuntime.ts": 1110,
     "src/shared/validation/schemas.ts": 2523,
     "_rebaseline_2026_06_28_5275_correlation_id_extract": "Extraction of the safe CorrelationId subset of #5275 (hartmark) — request correlation id stored in call_logs (migration 109) and returned via the X-Correlation-Id response header, WITHOUT the combo/resilience or build/lazy-loading changes (those stay in #5275). Own growth: callLogs.ts 975->985 (correlation_id column on CallLogSummaryRow + read/map), usageHistory.ts 983->988 (correlationId metadata normalize), chat.ts 1575->1632 (withCorrelationId response wiring + combo-failure log carrying correlationId), chatHelpers.ts new 811 (withCorrelationId helper + reqId threading; was 791<cap pre-feature). Cohesive request/logging chokepoint wiring; structural shrink of chat.ts tracked in #3501.",
     "src/sse/handlers/chat.ts": 1778,
diff --git a/src/shared/services/cliRuntime.ts b/src/shared/services/cliRuntime.ts
index 737d7639c45..e7088f73eae 100644
--- a/src/shared/services/cliRuntime.ts
+++ b/src/shared/services/cliRuntime.ts
@@ -584,6 +584,16 @@ export const getKnownToolPaths = (toolId: string): string[] => {
       if (localAppData) {
         paths.push(path.join(localAppData, "Programs", "Claude", "claude.exe"));
         paths.push(path.join(localAppData, "claude-code", "claude.exe"));
+        paths.push(
+          path.join(
+            localAppData,
+            "Microsoft",
+            "WinGet",
+            "Packages",
+            "Anthropic.ClaudeCode_Microsoft.Winget.Source_8wekyb3d8bbwe",
+            "claude.exe"
+          )
+        );
       }
     }
 
diff --git a/tests/unit/cli-runtime-detection.test.ts b/tests/unit/cli-runtime-detection.test.ts
index 4306ebdf34b..5c46a14161a 100644
--- a/tests/unit/cli-runtime-detection.test.ts
+++ b/tests/unit/cli-runtime-detection.test.ts
@@ -9,7 +9,7 @@ import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
 
-const { getCliRuntimeStatus, CLI_TOOL_IDS } =
+const { getCliRuntimeStatus, getKnownToolPaths, CLI_TOOL_IDS } =
   await import("../../src/shared/services/cliRuntime.ts");
 
 // ─── Helpers ──────────────────────────────────────────────────
@@ -22,6 +22,29 @@ function createTempDir() {
   return fs.mkdtempSync(path.join(testRoot, "cli-test-"));
 }
 
+describe("Claude Code Windows known paths", () => {
+  it("should include the WinGet Anthropic.ClaudeCode install path", () => {
+    const localAppData = process.env.LOCALAPPDATA;
+    const expected = localAppData
+      ? path.join(
+          localAppData,
+          "Microsoft",
+          "WinGet",
+          "Packages",
+          "Anthropic.ClaudeCode_Microsoft.Winget.Source_8wekyb3d8bbwe",
+          "claude.exe"
+        )
+      : null;
+
+    if (process.platform !== "win32" || !expected) return;
+
+    assert.ok(
+      getKnownToolPaths("claude").includes(expected),
+      "Claude Code installed by WinGet should be discoverable without CLI_CLAUDE_BIN"
+    );
+  });
+});
+
 function createFile(dir, name, content) {
   const filePath = path.join(dir, name);
   fs.writeFileSync(filePath, content);