diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3fd73f..f851d03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+- `strait doctor` and `strait test`: on a link domain before Dashboard → Apps & stores is filled in (Strait answers 404 `{"error":"not configured"}`), the finding is `app.none` with "Fill in Dashboard → Apps & stores (package name and SHA-256 fingerprint / Team ID and bundle ID), wait a minute, then check again", the same step `strait init` gives, not `host.file_missing` ("use your Strait link domain as endpoint"). Same wording as `doctor()` in the SDKs (51 shared vectors, shared-spec ADR 0002 amendment).
+
 ## 0.3.0 (7 Nov 2026)
 
 - `strait events add`: the Flutter snippet shows `eventId` (strait_sdk 0.10.0+ has it); the React Native one says `eventId` needs 0.11.0+.
diff --git a/README.md b/README.md
index 9d0d18a..6486927 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ Exit codes: `0` done, `2` usage problem (message on stderr), `1` unexpected erro
 npx @straitlink/cli doctor --host acme.strait.link --android com.acme.shop --ios com.acme.shop
 ```
 
-Runs the same checks, with the same finding ids and wording, as `doctor()` in the Strait SDKs (React Native 0.9.3, Swift 0.9.4, Android 0.8.4, Flutter 0.9.4; contract B23, the 43 shared cases in `test/doctor-vectors.json`). It fetches `https://<host>/.well-known/assetlinks.json` and `apple-app-site-association` once each and tells you whether your package, bundle ID and (with `--cert`) signing certificate are listed, with the fix for each problem:
+Runs the same checks, with the same finding ids and wording, as `doctor()` in the Strait SDKs (React Native, Flutter, iOS, Android and Unity; contract B23, the shared cases in `test/doctor-vectors.json`). It fetches `https://<host>/.well-known/assetlinks.json` and `apple-app-site-association` once each and tells you whether your package, bundle ID and (with `--cert`) signing certificate are listed, with the fix for each problem:
 
 ```
 Android (assetlinks.json)
diff --git a/src/doctor.mjs b/src/doctor.mjs
index 474b321..afa8df4 100644
--- a/src/doctor.mjs
+++ b/src/doctor.mjs
@@ -1,6 +1,6 @@
 // `strait doctor`: the SDK setup check (contract B23, shared-spec docs/adr/0002-sdk-doctor.md) from a
 // terminal. `doctorFindings` is a line-for-line port of strait-sdk-react-native 0.9.3 src/doctor.ts:
-// same finding ids, severities and wording as every SDK (test/doctor-vectors.json, 43 shared cases).
+// same finding ids, severities and wording as every SDK (test/doctor-vectors.json, the shared cases).
 
 /** The endpoint's host when it is an `https://` URL with a host, else null. */
 export function doctorHost(endpoint) {
@@ -61,14 +61,22 @@ export function doctorFindings(input) {
   return { ok: !findings.some((f) => f.severity === 'error'), findings };
 }
 
+/**
+ * A Strait link domain answers 404 {"error":"not configured"} until Apps & stores has this platform's app.
+ * Compared byte for byte (what the engine's well-known route sends), so every SDK agrees on any other body.
+ */
+const NOT_CONFIGURED = '{"error":"not configured"}';
+const notConfigured = (file) => file.status === 404 && file.body === NOT_CONFIGURED;
+
 function hostFindings(input, host, file) {
   const android = input.platform === 'android';
   if (file.status === undefined)
     return [err('host.unreachable', `Can't reach ${host}`, 'Check that endpoint is your link domain (Dashboard → Get started) and that this device is online.')];
   const apps = file.status === 200 ? listedApps(input.platform, file.body ?? '') : null;
-  if (!apps)
+  if (!apps && !notConfigured(file))
     return [err('host.file_missing', `${host} doesn't serve ${android ? 'assetlinks.json' : 'apple-app-site-association'}`, 'Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there.')];
-  if (!apps.size) return [err('app.none', `No ${android ? 'Android' : 'iOS'} app is set up for ${host}`, 'Add your app in Dashboard → Apps & stores.')];
+  if (!apps?.size)
+    return [err('app.none', `No ${android ? 'Android' : 'iOS'} app is set up for ${host}`, `Fill in Dashboard → Apps & stores (${android ? 'package name and SHA-256 fingerprint' : 'Team ID and bundle ID'}), wait a minute, then check again. Already done? Make sure ${host} is your link domain from Dashboard → Get started.`)];
 
   const listed = [...apps.keys()].join(', ');
   const app = input.appId?.trim();
diff --git a/test/doctor-vectors.json b/test/doctor-vectors.json
index 39b5116..dfe932e 100644
--- a/test/doctor-vectors.json
+++ b/test/doctor-vectors.json
@@ -542,6 +542,238 @@
         }
       ]
     },
+    {
+      "name": "app.none android: a Strait link domain before Apps & stores is filled in (404 not configured)",
+      "input": {
+        "platform": "android",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{\"error\":\"not configured\"}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "app.none",
+          "severity": "error",
+          "title": "No Android app is set up for acme.strait.link",
+          "fix": "Fill in Dashboard → Apps & stores (package name and SHA-256 fingerprint), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
+        }
+      ]
+    },
+    {
+      "name": "app.none ios: a Strait link domain before Apps & stores is filled in (404 not configured)",
+      "input": {
+        "platform": "ios",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{\"error\":\"not configured\"}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "app.none",
+          "severity": "error",
+          "title": "No iOS app is set up for acme.strait.link",
+          "fix": "Fill in Dashboard → Apps & stores (Team ID and bundle ID), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
+        }
+      ]
+    },
+    {
+      "name": "app.none ios: not configured, app id unknown",
+      "input": {
+        "platform": "ios",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": null,
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{\"error\":\"not configured\"}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "app.none",
+          "severity": "error",
+          "title": "No iOS app is set up for acme.strait.link",
+          "fix": "Fill in Dashboard → Apps & stores (Team ID and bundle ID), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
+        }
+      ]
+    },
+    {
+      "name": "host.file_missing android 404 with another JSON error",
+      "input": {
+        "platform": "android",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{\"error\":\"not found\"}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "host.file_missing",
+          "severity": "error",
+          "title": "acme.strait.link doesn't serve assetlinks.json",
+          "fix": "Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there."
+        }
+      ]
+    },
+    {
+      "name": "host.file_missing android 404 with a JSON string body",
+      "input": {
+        "platform": "android",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "\"not configured\""
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "host.file_missing",
+          "severity": "error",
+          "title": "acme.strait.link doesn't serve assetlinks.json",
+          "fix": "Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there."
+        }
+      ]
+    },
+    {
+      "name": "host.file_missing android 404 not configured with spaces (only the exact engine body counts)",
+      "input": {
+        "platform": "android",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{ \"error\": \"not configured\" }"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "host.file_missing",
+          "severity": "error",
+          "title": "acme.strait.link doesn't serve assetlinks.json",
+          "fix": "Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there."
+        }
+      ]
+    },
+    {
+      "name": "host.file_missing android 404 not configured in single quotes",
+      "input": {
+        "platform": "android",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 404,
+          "body": "{'error':'not configured'}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "host.file_missing",
+          "severity": "error",
+          "title": "acme.strait.link doesn't serve assetlinks.json",
+          "fix": "Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there."
+        }
+      ]
+    },
+    {
+      "name": "host.file_missing ios 500 with the not configured body",
+      "input": {
+        "platform": "ios",
+        "publishableKey": "st_pub_live_x",
+        "endpoint": "https://acme.strait.link",
+        "appId": "com.acme.app",
+        "certSha256": [],
+        "file": {
+          "status": 500,
+          "body": "{\"error\":\"not configured\"}"
+        }
+      },
+      "ok": false,
+      "findings": [
+        {
+          "id": "key.ok",
+          "severity": "ok",
+          "title": "Publishable key is set",
+          "fix": ""
+        },
+        {
+          "id": "host.file_missing",
+          "severity": "error",
+          "title": "acme.strait.link doesn't serve apple-app-site-association",
+          "fix": "Use your Strait link domain as endpoint (Dashboard → Get started); Strait serves this file there."
+        }
+      ]
+    },
     {
       "name": "app.none android empty array",
       "input": {
@@ -567,7 +799,7 @@
           "id": "app.none",
           "severity": "error",
           "title": "No Android app is set up for acme.strait.link",
-          "fix": "Add your app in Dashboard → Apps & stores."
+          "fix": "Fill in Dashboard → Apps & stores (package name and SHA-256 fingerprint), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
         }
       ]
     },
@@ -596,7 +828,7 @@
           "id": "app.none",
           "severity": "error",
           "title": "No Android app is set up for acme.strait.link",
-          "fix": "Add your app in Dashboard → Apps & stores."
+          "fix": "Fill in Dashboard → Apps & stores (package name and SHA-256 fingerprint), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
         }
       ]
     },
@@ -625,7 +857,7 @@
           "id": "app.none",
           "severity": "error",
           "title": "No iOS app is set up for acme.strait.link",
-          "fix": "Add your app in Dashboard → Apps & stores."
+          "fix": "Fill in Dashboard → Apps & stores (Team ID and bundle ID), wait a minute, then check again. Already done? Make sure acme.strait.link is your link domain from Dashboard → Get started."
         }
       ]
     },
diff --git a/test/doctor.test.mjs b/test/doctor.test.mjs
index b41e9c6..cf21175 100644
--- a/test/doctor.test.mjs
+++ b/test/doctor.test.mjs
@@ -11,8 +11,8 @@ import { HOST, KEY, sink } from './helpers.mjs';
 const VECTORS = new URL('./doctor-vectors.json', import.meta.url);
 const { vectors } = JSON.parse(readFileSync(VECTORS, 'utf8'));
 
-test('the 43 shared doctor vectors: same ids, severities and wording as the SDKs', () => {
-  assert.ok(vectors.length >= 43);
+test('the shared doctor vectors: same ids, severities and wording as the SDKs', () => {
+  assert.ok(vectors.length >= 51);
   for (const v of vectors) {
     const { file, appId, ...rest } = v.input;
     const report = doctorFindings({
@@ -106,6 +106,21 @@ test('doctor: unreachable host and missing file use the SDK wording', async () =
   assert.match(r.out, /error\s+host\.file_missing\s+acme\.strait\.link doesn't serve apple-app-site-association/);
 });
 
+// User-lens audit item 10: the most common first-time state. The link domain is right, but Apps & stores is
+// empty, so Strait answers 404 {"error":"not configured"}. The fix is Apps & stores, as `strait init` says.
+test('doctor before Apps & stores is filled in: app.none with the Apps & stores fix, not "use your link domain"', async () => {
+  const notConfigured = [404, '{"error":"not configured"}'];
+  const r = await run(['doctor', '--host', HOST, '--android', 'com.acme.shop', '--ios', 'com.acme.shop'], {
+    fetch: fakeFetch({ 'assetlinks.json': notConfigured, 'apple-app-site-association': notConfigured }),
+  });
+  assert.equal(r.code, 1);
+  assert.doesNotMatch(r.out, /host\.file_missing|Use your Strait link domain as endpoint/);
+  assert.match(r.out, /error\s+app\.none\s+No Android app is set up for acme\.strait\.link/);
+  assert.match(r.out, /Fix: Fill in Dashboard → Apps & stores \(package name and SHA-256 fingerprint\), wait a minute, then check again\./);
+  assert.match(r.out, /error\s+app\.none\s+No iOS app is set up for acme\.strait\.link/);
+  assert.match(r.out, /Fix: Fill in Dashboard → Apps & stores \(Team ID and bundle ID\), wait a minute, then check again\./);
+});
+
 test('doctor: a secret key is flagged and never printed', async () => {
   const secret = 'st_live_abcdef0123456789abcdef0123456789';
   const r = await run(['doctor', '--host', HOST, '--key', secret]);