diff --git a/packages/cli/src/capture/captureCompositionFrame.ts b/packages/cli/src/capture/captureCompositionFrame.ts
index 2b0d164094..0b0f44601a 100644
--- a/packages/cli/src/capture/captureCompositionFrame.ts
+++ b/packages/cli/src/capture/captureCompositionFrame.ts
@@ -2,6 +2,7 @@ import { spawn } from "node:child_process";
 import type { Browser, Page } from "puppeteer-core";
 import { c } from "../ui/colors.js";
 import { resolveCompositionViewportFromHtml } from "../utils/compositionViewport.js";
+import { resolveDiagnosticNavigationTimeoutMs } from "../utils/renderArgs.js";
 
 const SHADER_TRANSITIONS_TIMEOUT_MS = 90_000;
 const CAPTURE_SETTLE_MS = 1500;
@@ -170,7 +171,10 @@ export async function openSettledCompositionPage(
     await installPageFunctionGuard(page);
     await page.setViewport(viewport);
     await options.beforeNavigate?.(page);
-    await page.goto(url, { waitUntil: "domcontentloaded", timeout: 10000 });
+    await page.goto(url, {
+      waitUntil: "domcontentloaded",
+      timeout: resolveDiagnosticNavigationTimeoutMs(),
+    });
     const renderReadyTimedOut = !(await waitForCompositionSettle(page, options));
     return { browser: chromeBrowser, page, renderReadyTimedOut };
   } catch (err) {
diff --git a/packages/cli/src/commands/layout.ts b/packages/cli/src/commands/layout.ts
index a7025d787e..5879f21290 100644
--- a/packages/cli/src/commands/layout.ts
+++ b/packages/cli/src/commands/layout.ts
@@ -5,6 +5,7 @@ import { fileURLToPath } from "node:url";
 import type { Example } from "./_examples.js";
 import { c } from "../ui/colors.js";
 import { resolveProject } from "../utils/project.js";
+import { resolveDiagnosticNavigationTimeoutMs } from "../utils/renderArgs.js";
 import { normalizeErrorMessage } from "../utils/errorMessage.js";
 import { serveStaticProjectHtml } from "../utils/staticProjectServer.js";
 import { printDeprecationNotice, withMeta } from "../utils/updateCheck.js";
@@ -180,7 +181,10 @@ async function alignViewportToComposition(
   });
 
   await page.setViewport(size);
-  await page.goto(url, { waitUntil: "domcontentloaded", timeout: 10000 });
+  await page.goto(url, {
+    waitUntil: "domcontentloaded",
+    timeout: resolveDiagnosticNavigationTimeoutMs(),
+  });
 }
 
 async function runLayoutAudit(
@@ -217,7 +221,10 @@ async function runLayoutAudit(
     const page = await chromeBrowser.newPage();
     await installPageFunctionGuard(page);
     await page.setViewport({ width: 1920, height: 1080 });
-    await page.goto(server.url, { waitUntil: "domcontentloaded", timeout: 10000 });
+    await page.goto(server.url, {
+      waitUntil: "domcontentloaded",
+      timeout: resolveDiagnosticNavigationTimeoutMs(),
+    });
     await alignViewportToComposition(page, server.url);
     await page
       .waitForFunction(() => !!(window as unknown as { __timelines?: unknown }).__timelines, {
diff --git a/packages/cli/src/commands/motionShot.ts b/packages/cli/src/commands/motionShot.ts
index 0bf1061c6b..a1e93bb634 100644
--- a/packages/cli/src/commands/motionShot.ts
+++ b/packages/cli/src/commands/motionShot.ts
@@ -11,6 +11,7 @@
 // (pure, tested); this file only drives the browser and SAMPLES.
 
 import { writeFileSync } from "node:fs";
+import { resolveDiagnosticNavigationTimeoutMs } from "../utils/renderArgs.js";
 import {
   buildOnionSvg,
   ghostAlphas,
@@ -258,7 +259,8 @@ async function openCompositionPage(
     ],
   });
   const page = await browser.newPage();
-  await page.goto(url, { waitUntil: "domcontentloaded", timeout: 10000 });
+  const navigationTimeout = resolveDiagnosticNavigationTimeoutMs();
+  await page.goto(url, { waitUntil: "domcontentloaded", timeout: navigationTimeout });
   const size = await page.evaluate(() => {
     const root = document.querySelector("[data-composition-id][data-width][data-height]");
     const w = root ? parseInt(root.getAttribute("data-width") ?? "", 10) : 0;
@@ -269,7 +271,7 @@ async function openCompositionPage(
     };
   });
   await page.setViewport(size);
-  await page.goto(url, { waitUntil: "domcontentloaded", timeout: 10000 });
+  await page.goto(url, { waitUntil: "domcontentloaded", timeout: navigationTimeout });
   await page
     .waitForFunction(() => !!(window as unknown as { __timelines?: unknown }).__timelines, {
       timeout: 10000,
diff --git a/packages/cli/src/utils/renderArgs.test.ts b/packages/cli/src/utils/renderArgs.test.ts
index 397d8cc51e..9d88e99111 100644
--- a/packages/cli/src/utils/renderArgs.test.ts
+++ b/packages/cli/src/utils/renderArgs.test.ts
@@ -5,6 +5,7 @@ import { dirname, join, resolve } from "node:path";
 import {
   MAX_PAGE_NAVIGATION_TIMEOUT_SECONDS,
   parseBrowserTimeoutMsArg,
+  resolveDiagnosticNavigationTimeoutMs,
   parseCompositionEntryArg,
   parseGifLoopArg,
   resolveDefaultFpsArg,
@@ -103,6 +104,21 @@ describe("parseBrowserTimeoutMsArg", () => {
   });
 });
 
+describe("resolveDiagnosticNavigationTimeoutMs", () => {
+  it("uses the render navigation timeout env override", () => {
+    expect(
+      resolveDiagnosticNavigationTimeoutMs({ PRODUCER_PAGE_NAVIGATION_TIMEOUT_MS: "90000" }),
+    ).toBe(90_000);
+  });
+
+  it("falls back to ten seconds for missing or invalid values", () => {
+    expect(resolveDiagnosticNavigationTimeoutMs({})).toBe(10_000);
+    expect(
+      resolveDiagnosticNavigationTimeoutMs({ PRODUCER_PAGE_NAVIGATION_TIMEOUT_MS: "invalid" }),
+    ).toBe(10_000);
+  });
+});
+
 describe("parseCompositionEntryArg", () => {
   const PROJECT = "/proj";
   const stat = makeStat({
diff --git a/packages/cli/src/utils/renderArgs.ts b/packages/cli/src/utils/renderArgs.ts
index f7cd98a5c5..05be2024eb 100644
--- a/packages/cli/src/utils/renderArgs.ts
+++ b/packages/cli/src/utils/renderArgs.ts
@@ -117,6 +117,14 @@ export function resolveBrowserTimeoutMsArg(raw: string | undefined): number | un
   return result.value;
 }
 
+/** Navigation budget shared by snapshot/check/inspect browser diagnostics. */
+export function resolveDiagnosticNavigationTimeoutMs(
+  env: Record<string, string | undefined> = process.env,
+): number {
+  const parsed = Number(env.PRODUCER_PAGE_NAVIGATION_TIMEOUT_MS);
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : 10_000;
+}
+
 // ── --composition ──────────────────────────────────────────────────────
 
 export type CompositionEntryParseError =