diff --git a/packages/lint/src/rules/core.test.ts b/packages/lint/src/rules/core.test.ts
index 1bc0a21e8a..d11d9a4b67 100644
--- a/packages/lint/src/rules/core.test.ts
+++ b/packages/lint/src/rules/core.test.ts
@@ -601,6 +601,25 @@ describe("core rules", () => {
});
describe("non_deterministic_code", () => {
+ it("gives randomness guidance for crypto and clock guidance for wall time", async () => {
+ const result = await lintHyperframeHtml(`
+
+
+ `);
+ const crypto = result.findings.find((finding) =>
+ finding.message.includes("crypto.getRandomValues"),
+ );
+ const clock = result.findings.find((finding) => finding.message.includes("Date.now"));
+ expect(crypto).toMatchObject({ code: "non_deterministic_code", severity: "error" });
+ expect(crypto?.fixHint).toContain("seeded PRNG");
+ expect(crypto?.fixHint).not.toContain("time-dependent");
+ expect(clock?.fixHint).toContain("wall-clock time");
+ });
+
it("detects Math.random() in script content", async () => {
const html = `
diff --git a/packages/lint/src/rules/core.ts b/packages/lint/src/rules/core.ts
index 8d784da2ff..d387a42d53 100644
--- a/packages/lint/src/rules/core.ts
+++ b/packages/lint/src/rules/core.ts
@@ -478,7 +478,7 @@ export const coreRules: Array<(ctx: LintContext) => HyperframeLintFinding[]> = [
{
pattern: /crypto\.getRandomValues\s*\(/,
label: "crypto.getRandomValues()",
- hint: "Remove time-dependent code. Use a seeded PRNG for deterministic renders.",
+ hint: "Use a seeded PRNG (e.g. a simple mulberry32) so renders are deterministic across frames.",
},
{
pattern: /gsap\.utils\.random\s*\(/,