diff --git a/apps/web/package.json b/apps/web/package.json
index 987c1a2c..dcfd638a 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -26,6 +26,7 @@
     "@corbits/client-log": "workspace:*",
     "@corbits/command-palette": "workspace:*",
     "@corbits/context-menu": "workspace:*",
+    "@corbits/error-sink": "workspace:*",
     "@corbits/inbox": "workspace:*",
     "@corbits/inference-settings": "workspace:*",
     "@corbits/insights": "workspace:*",
diff --git a/apps/web/src/app-error-boundary.tsx b/apps/web/src/app-error-boundary.tsx
index 1462a671..83373313 100644
--- a/apps/web/src/app-error-boundary.tsx
+++ b/apps/web/src/app-error-boundary.tsx
@@ -3,28 +3,33 @@
 // this as a class component (no hook equivalent exists), so it's the one
 // class in an otherwise function-component codebase.
 
-import { getLogger } from "@corbits/client-log";
+import { reportError } from "@corbits/error-sink";
 import { Button, EmptyState } from "@corbits/react-ui";
 import { BoldIconProvider, WarningCircle } from "@corbits/icons";
 import { Component, type ErrorInfo, type ReactNode } from "react";
 
-const log = getLogger("web.app-error-boundary");
-
 export class AppErrorBoundary extends Component<
   { readonly children: ReactNode },
-  { readonly hasError: boolean }
+  { readonly hasError: boolean; readonly refId?: string }
 > {
-  override state = { hasError: false };
+  override state: { readonly hasError: boolean; readonly refId?: string } = {
+    hasError: false,
+  };
 
   static getDerivedStateFromError(): { hasError: boolean } {
     return { hasError: true };
   }
 
   override componentDidCatch(error: Error, info: ErrorInfo): void {
-    log.error(error.message, {
-      stack: error.stack,
-      componentStack: info.componentStack,
+    const refId = reportError(error, {
+      operation: "app_render",
+      extra: {
+        ...(info.componentStack !== null
+          ? { componentStack: info.componentStack }
+          : {}),
+      },
     });
+    this.setState({ hasError: true, refId });
   }
 
   override render(): ReactNode {
@@ -35,7 +40,19 @@ export class AppErrorBoundary extends Component<
           <EmptyState
             icon={<WarningCircle />}
             title="This screen hit a snag"
-            description="Something broke while rendering. Reloading usually fixes it."
+            description={
+              this.state.refId === undefined ? (
+                "Something broke while rendering. Reloading usually fixes it."
+              ) : (
+                <>
+                  Something broke while rendering. Reloading usually fixes it.
+                  <br />
+                  <span className="app-boot-frame-refid">
+                    Reference: {this.state.refId}
+                  </span>
+                </>
+              )
+            }
             action={
               <Button
                 variant="outline"
diff --git a/apps/web/src/app.css b/apps/web/src/app.css
index e8eec470..8950f658 100644
--- a/apps/web/src/app.css
+++ b/apps/web/src/app.css
@@ -87,6 +87,13 @@ select:disabled,
   height: 100dvh;
 }
 
+/* A quoteable reference id under the error boundary's failure message
+   (CL-6632) — small and muted, same treatment as `.onboarding-error-refid`. */
+.app-boot-frame-refid {
+  font-size: 0.75rem;
+  color: var(--muted-foreground);
+}
+
 /* The app shell: one sidebar, the main pane, and the optional canvas.
    Columns are sized in rem/vw so they hold their proportions across
    viewports instead of clipping at a fixed pixel width. */
diff --git a/apps/web/test/app-error-boundary.test.tsx b/apps/web/test/app-error-boundary.test.tsx
index b9eae838..0d5991f8 100644
--- a/apps/web/test/app-error-boundary.test.tsx
+++ b/apps/web/test/app-error-boundary.test.tsx
@@ -55,4 +55,20 @@ describe("AppErrorBoundary", () => {
     expect(el.textContent).toContain("Reload");
     expect(el.textContent).not.toContain("Everything is fine");
   });
+
+  // CL-6632: a render crash that never reaches a sink is undiagnosable in
+  // production — the boundary must report through `reportError`
+  // (`@corbits/error-sink`) and show the refId that call returns, so a
+  // person hitting this can quote it back to support.
+  test("a caught render error surfaces a refId a person can quote", () => {
+    const originalError = console.error;
+    console.error = () => undefined;
+    let el: HTMLDivElement;
+    try {
+      el = render(<Bomb />);
+    } finally {
+      console.error = originalError;
+    }
+    expect(el.textContent).toMatch(/Reference: [0-9a-z]+-[0-9a-z]+/);
+  });
 });
diff --git a/bun.lock b/bun.lock
index 127f1da6..877eeb8c 100644
--- a/bun.lock
+++ b/bun.lock
@@ -147,6 +147,7 @@
         "@corbits/client-log": "workspace:*",
         "@corbits/command-palette": "workspace:*",
         "@corbits/context-menu": "workspace:*",
+        "@corbits/error-sink": "workspace:*",
         "@corbits/icons": "workspace:*",
         "@corbits/inbox": "workspace:*",
         "@corbits/inference-settings": "workspace:*",
@@ -3458,6 +3459,8 @@
 
     "@babel/helper-compilation-targets/semver": ["semver@6.3.1", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA=="],
 
+    "@corbits/memory-hub/@corbits/memory": ["@corbits/memory@github:corbitsdev/corbits-memory#9e6f213", { "dependencies": { "@intx/agent": "0.2.2", "@intx/authz": "0.2.2", "@intx/hub-api": "0.2.2", "@intx/log": "0.2.2", "@intx/workflow": "0.2.2", "arktype": "^2.1.29", "drizzle-orm": "^0.45.1", "hono": "^4.9.0", "hono-openapi": "^1.3.1", "postgres": "^3.4.7" } }, "corbitsdev-corbits-memory-9e6f213", "sha512-utnM4ZT2zmslcPXYWAAqxlDNLcpGsXFiTOtj8h7+OXnhCP0Eaw8yl25+yCTyHpvt3jcdeG4h5uFsSj7ou0BZCA=="],
+
     "@esbuild-kit/core-utils/esbuild": ["esbuild@0.18.20", "", { "optionalDependencies": { "@esbuild/android-arm": "0.18.20", "@esbuild/android-arm64": "0.18.20", "@esbuild/android-x64": "0.18.20", "@esbuild/darwin-arm64": "0.18.20", "@esbuild/darwin-x64": "0.18.20", "@esbuild/freebsd-arm64": "0.18.20", "@esbuild/freebsd-x64": "0.18.20", "@esbuild/linux-arm": "0.18.20", "@esbuild/linux-arm64": "0.18.20", "@esbuild/linux-ia32": "0.18.20", "@esbuild/linux-loong64": "0.18.20", "@esbuild/linux-mips64el": "0.18.20", "@esbuild/linux-ppc64": "0.18.20", "@esbuild/linux-riscv64": "0.18.20", "@esbuild/linux-s390x": "0.18.20", "@esbuild/linux-x64": "0.18.20", "@esbuild/netbsd-x64": "0.18.20", "@esbuild/openbsd-x64": "0.18.20", "@esbuild/sunos-x64": "0.18.20", "@esbuild/win32-arm64": "0.18.20", "@esbuild/win32-ia32": "0.18.20", "@esbuild/win32-x64": "0.18.20" }, "bin": { "esbuild": "bin/esbuild" } }, "sha512-ceqxoedUrcayh7Y7ZX6NdbbDzGROiyVBgC4PriJThBKSVPWnnFHZAkfI1lJT8QFkOwH4qOS2SJkS4wvpGl8BpA=="],
 
     "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
@@ -3480,6 +3483,10 @@
 
     "@typescript-eslint/eslint-plugin/ignore": ["ignore@7.0.6", "", {}, "sha512-BAg6QkE8W+TuQLrrw0Ugr7HegXduRuuj8/ti2kSOc+jz1dmx8/WNcjr6XGnq5YpDWxFwwaavqD0+jIUOKelTsw=="],
 
+    "@workbench/hub/@corbits/mailbox": ["@corbits/mailbox@github:corbitsdev/corbits-mailbox#caa5214", { "dependencies": { "@hono/standard-validator": "0.2.3", "@standard-community/standard-json": "0.3.5", "@standard-community/standard-openapi": "0.2.9", "arktype": "2.1.29", "hono-openapi": "1.3.1" }, "peerDependencies": { "@intx/log": "^0.2.2", "@intx/mime": "^0.2.2", "@intx/types": "^0.2.2", "drizzle-orm": "^0.45.2", "hono": "^4.12.0", "postgres": "^3.4.0" } }, "corbitsdev-corbits-mailbox-caa5214", "sha512-z8DRBFgA4ukM8p29COeaMjfKZYe5jAUF4OBMiaIQFuW592+DGD/y6Ws6SjGlXmR9azkHNWh8oTzjlWlRP24vsQ=="],
+
+    "@workbench/hub/@corbits/memory": ["@corbits/memory@github:corbitsdev/corbits-memory#9e6f213", { "dependencies": { "@intx/agent": "0.2.2", "@intx/authz": "0.2.2", "@intx/hub-api": "0.2.2", "@intx/log": "0.2.2", "@intx/workflow": "0.2.2", "arktype": "^2.1.29", "drizzle-orm": "^0.45.1", "hono": "^4.9.0", "hono-openapi": "^1.3.1", "postgres": "^3.4.7" } }, "corbitsdev-corbits-memory-9e6f213", "sha512-utnM4ZT2zmslcPXYWAAqxlDNLcpGsXFiTOtj8h7+OXnhCP0Eaw8yl25+yCTyHpvt3jcdeG4h5uFsSj7ou0BZCA=="],
+
     "ajv-formats/ajv": ["ajv@8.20.0", "", { "dependencies": { "fast-deep-equal": "^3.1.3", "fast-uri": "^3.0.1", "json-schema-traverse": "^1.0.0", "require-from-string": "^2.0.2" } }, "sha512-Thbli+OlOj+iMPYFBVBfJ3OmCAnaSyNn4M1vz9T6Gka5Jt9ba/HIR56joy65tY6kx/FCF5VXNB819Y7/GUrBGA=="],
 
     "better-call/@better-auth/utils": ["@better-auth/utils@0.5.0", "", { "dependencies": { "@noble/hashes": "^2.0.1" } }, "sha512-BL8W4EfIZFwlu0r54m3v1ztjDhu6dDe/amLTm0xybmbZaNgYUqhD3SjpAsnq0q8YD6/ki4iwIgxJNLP/N3TxiA=="],