diff --git a/docs/tools/skills-config.md b/docs/tools/skills-config.md
index 6cdf71a07b4b..174ee5d7ecca 100644
--- a/docs/tools/skills-config.md
+++ b/docs/tools/skills-config.md
@@ -180,7 +180,8 @@ write one JSON object on stdout with an `allow`, `warn`, or `block` decision.
 `findings` array. Each finding requires non-empty string `ruleId` and `message`
 fields plus a `severity` of `info`, `warn`, or `critical`. Optional `file` and
 `evidence` values must be non-empty strings; a finite numeric `line` is rounded
-down and clamped to at least 1. Malformed finding entries are ignored, and
+down and clamped to the safe-integer range from 1 through `Number.MAX_SAFE_INTEGER`.
+Malformed finding entries are ignored, and
 invalid optional fields are omitted. A non-array `findings` value is treated as
 absent. Operator-facing reason and finding text are limited to 1,000 characters.
 OpenClaw retains at most 100 normalized findings for display. Only a `warn`
diff --git a/src/security/install-policy-response.ts b/src/security/install-policy-response.ts
index f16edbe56c49..c6443ac67e92 100644
--- a/src/security/install-policy-response.ts
+++ b/src/security/install-policy-response.ts
@@ -52,7 +52,7 @@ const installPolicyFindingSchema = z
     line: z
       .number()
       .finite()
-      .transform((value) => Math.max(1, Math.floor(value)))
+      .transform((value) => Math.min(Number.MAX_SAFE_INTEGER, Math.max(1, Math.floor(value))))
       .optional()
       .catch(undefined),
     evidence: optionalFindingTextSchema,
diff --git a/src/security/install-policy.test.ts b/src/security/install-policy.test.ts
index a81698e61f03..daa8597576b6 100644
--- a/src/security/install-policy.test.ts
+++ b/src/security/install-policy.test.ts
@@ -451,6 +451,31 @@ describe("runInstallPolicy", () => {
     expect(debugLogs.filter((message) => message.endsWith(": warned"))).toHaveLength(1);
   });
 
+  it("normalizes warning finding lines to positive safe integers", async () => {
+    const result = await runInstallPolicy({
+      config: configWithPolicy(scriptPath, {
+        POLICY_RESPONSE: JSON.stringify({
+          protocolVersion: 1,
+          decision: "warn",
+          reason: "review line normalization",
+          findings: [-2, 12.9, 1e100].map((line, index) => ({
+            ruleId: `line-${String(index)}`,
+            severity: "warn",
+            message: "Review line",
+            line,
+          })),
+        }),
+      }),
+      request: baseRequest(sourceDir),
+    });
+
+    expect(result?.findings?.map((finding) => finding.line)).toEqual([
+      1,
+      12,
+      Number.MAX_SAFE_INTEGER,
+    ]);
+  });
+
   it("fingerprints warning reason changes beyond the display limit", async () => {
     const sharedPrefix = "r".repeat(1000);
     const runWarning = async (reason: string) =>