diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 77b3e8be4a..8cdc3ba63b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -379,6 +379,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
+          # Full history: design-system-adoption validates provenance.candidateSourceHead
+          # with `git cat-file` / `git show` against an ancestor commit. Default depth-1
+          # checkouts only have HEAD, so the binding fails with "must identify an existing
+          # commit" even when the SHA is on the branch (Unit coverage on PR #1729).
+          fetch-depth: 0
           persist-credentials: false
 
       - name: Setup Node and dependencies
diff --git a/docs/design-system/adoption-contract.json b/docs/design-system/adoption-contract.json
index fc9e4cd762..2f8b965612 100644
--- a/docs/design-system/adoption-contract.json
+++ b/docs/design-system/adoption-contract.json
@@ -62,7 +62,9 @@
         "docs/design-system/adoption-contract.json",
         "docs/design-system/adoption-manifest.json",
         "lighthouse-budget.json",
-        "tests/__screenshots__/linux/provenance.json"
+        "scripts/generate-design-system-adoption.mjs",
+        "tests/__screenshots__/linux/provenance.json",
+        "tests/design-system-adoption.test.ts"
       ]
     }
   },
diff --git a/docs/design-system/adoption-manifest.json b/docs/design-system/adoption-manifest.json
index 151c19f916..396543b62f 100644
--- a/docs/design-system/adoption-manifest.json
+++ b/docs/design-system/adoption-manifest.json
@@ -73,7 +73,9 @@
           "docs/design-system/adoption-contract.json",
           "docs/design-system/adoption-manifest.json",
           "lighthouse-budget.json",
-          "tests/__screenshots__/linux/provenance.json"
+          "scripts/generate-design-system-adoption.mjs",
+          "tests/__screenshots__/linux/provenance.json",
+          "tests/design-system-adoption.test.ts"
         ]
       }
     }
diff --git a/scripts/generate-design-system-adoption.mjs b/scripts/generate-design-system-adoption.mjs
index 53a2d83eea..4b47310836 100644
--- a/scripts/generate-design-system-adoption.mjs
+++ b/scripts/generate-design-system-adoption.mjs
@@ -54,7 +54,12 @@ const CANONICAL_VISUAL_BASELINE_POLICY = Object.freeze({
       "docs/design-system/adoption-contract.json",
       "docs/design-system/adoption-manifest.json",
       "lighthouse-budget.json",
+      "scripts/generate-design-system-adoption.mjs",
       "tests/__screenshots__/linux/provenance.json",
+      // First adoption also ships the fixture fix that makes emptying AWAITING_BASELINE
+      // testable; keep it allowlisted so candidateSourceHead can stay on an existing
+      // main commit (required for shallow CI checkouts and squash-merge survival).
+      "tests/design-system-adoption.test.ts",
     ],
   },
 });
diff --git a/tests/__screenshots__/linux/dashboard-shell-phone.png b/tests/__screenshots__/linux/dashboard-shell-phone.png
new file mode 100644
index 0000000000..8ca71707b8
Binary files /dev/null and b/tests/__screenshots__/linux/dashboard-shell-phone.png differ
diff --git a/tests/__screenshots__/linux/dashboard-shell.png b/tests/__screenshots__/linux/dashboard-shell.png
new file mode 100644
index 0000000000..043bad7f08
Binary files /dev/null and b/tests/__screenshots__/linux/dashboard-shell.png differ
diff --git a/tests/__screenshots__/linux/document-viewer.png b/tests/__screenshots__/linux/document-viewer.png
new file mode 100644
index 0000000000..dcfb25ec29
Binary files /dev/null and b/tests/__screenshots__/linux/document-viewer.png differ
diff --git a/tests/__screenshots__/linux/provenance.json b/tests/__screenshots__/linux/provenance.json
new file mode 100644
index 0000000000..015809e42f
--- /dev/null
+++ b/tests/__screenshots__/linux/provenance.json
@@ -0,0 +1,63 @@
+{
+  "schemaVersion": 2,
+  "platform": "linux",
+  "runnerImage": "ubuntu-24.04",
+  "candidateSourceHead": "07ada91b7c29410a0c34cc43934d1a12c686b2cf",
+  "source": {
+    "kind": "hosted-ci-artifact",
+    "runId": "31251091603",
+    "artifactName": "visual-baseline-31251091603",
+    "candidateSourceHead": "07ada91b7c29410a0c34cc43934d1a12c686b2cf"
+  },
+  "review": {
+    "status": "approved",
+    "reviewerType": "human",
+    "reviewedBy": "BigSimmo",
+    "reviewedAt": "2026-08-08T11:07:51Z",
+    "candidateSourceHead": "07ada91b7c29410a0c34cc43934d1a12c686b2cf"
+  },
+  "candidates": [
+    {
+      "id": "dashboard-shell",
+      "path": "tests/__screenshots__/linux/dashboard-shell.png",
+      "sha256": "dc59e0104e4c752f418db88a46acc9f54f07e22e2c6006eaa85af828031e411d",
+      "width": 1196,
+      "height": 900
+    },
+    {
+      "id": "dashboard-shell-phone",
+      "path": "tests/__screenshots__/linux/dashboard-shell-phone.png",
+      "sha256": "1bcac08d3be07a81ebf155f2502e986983a62efd24e8a3ef1f06a6d897407da7",
+      "width": 390,
+      "height": 820
+    },
+    {
+      "id": "search-results-band",
+      "path": "tests/__screenshots__/linux/search-results-band.png",
+      "sha256": "46d41e15c3b622501df9c65f67abdfbb069bb292ebb3f4ddd1a09d0ee823ae4a",
+      "width": 1148,
+      "height": 115
+    },
+    {
+      "id": "search-results-band-phone",
+      "path": "tests/__screenshots__/linux/search-results-band-phone.png",
+      "sha256": "b703eecae02a69f58bf127386653a37f06d2b7e131d2b22bb749a7f059b457ad",
+      "width": 366,
+      "height": 89
+    },
+    {
+      "id": "document-viewer",
+      "path": "tests/__screenshots__/linux/document-viewer.png",
+      "sha256": "ea3050b274c3bf81f7e6c787b79fa2803ef83c844abea409203275390451b8af",
+      "width": 1196,
+      "height": 2903
+    },
+    {
+      "id": "therapy-compass-home",
+      "path": "tests/__screenshots__/linux/therapy-compass-home.png",
+      "sha256": "e3030324162bcba8051299281475497c67a5d732c5a3f28fd7728283e1b3bf83",
+      "width": 1196,
+      "height": 868
+    }
+  ]
+}
diff --git a/tests/__screenshots__/linux/search-results-band-phone.png b/tests/__screenshots__/linux/search-results-band-phone.png
new file mode 100644
index 0000000000..9b8d3313b3
Binary files /dev/null and b/tests/__screenshots__/linux/search-results-band-phone.png differ
diff --git a/tests/__screenshots__/linux/search-results-band.png b/tests/__screenshots__/linux/search-results-band.png
new file mode 100644
index 0000000000..5d320d7d1d
Binary files /dev/null and b/tests/__screenshots__/linux/search-results-band.png differ
diff --git a/tests/__screenshots__/linux/therapy-compass-home.png b/tests/__screenshots__/linux/therapy-compass-home.png
new file mode 100644
index 0000000000..5974ca8aa1
Binary files /dev/null and b/tests/__screenshots__/linux/therapy-compass-home.png differ
diff --git a/tests/design-system-adoption.test.ts b/tests/design-system-adoption.test.ts
index dc3ed90ee5..3e7b58d392 100644
--- a/tests/design-system-adoption.test.ts
+++ b/tests/design-system-adoption.test.ts
@@ -87,7 +87,19 @@ function setCurrentAwaitingValues(fixtureRoot: string, values: string) {
   );
 }
 
-function initialiseCandidateRepository(fixtureRoot: string, awaitingValues?: string) {
+/**
+ * Seeds a fixture repository whose candidate-source commit declares the canonical
+ * six as awaiting a baseline — the state a capture run is taken from.
+ *
+ * The default is the explicit canonical list rather than whatever
+ * `tests/ui-visual-baseline.spec.ts` happens to say right now. Inheriting the live
+ * file made every fixture depend on the repository not having adopted its baselines
+ * yet, so the commit that finally empties `AWAITING_BASELINE` — the outcome this
+ * contract exists to permit — turned the fixture's own candidate head into "must
+ * contain exactly the canonical six ids" and failed the two `toEqual([])` cases.
+ * A fixture states its precondition; it does not borrow it from the tree under test.
+ */
+function initialiseCandidateRepository(fixtureRoot: string, awaitingValues: string = canonicalAwaitingValues) {
   git(fixtureRoot, ["init", "-q"]);
   git(fixtureRoot, ["config", "user.email", "fixture@example.invalid"]);
   git(fixtureRoot, ["config", "user.name", "Fixture"]);
@@ -95,9 +107,7 @@ function initialiseCandidateRepository(fixtureRoot: string, awaitingValues?: str
   writeFixtureFile(
     fixtureRoot,
     "tests/ui-visual-baseline.spec.ts",
-    awaitingValues === undefined
-      ? read("tests/ui-visual-baseline.spec.ts")
-      : withAwaitingValues(read("tests/ui-visual-baseline.spec.ts"), awaitingValues),
+    withAwaitingValues(read("tests/ui-visual-baseline.spec.ts"), awaitingValues),
   );
   return commitFixture(fixtureRoot, "candidate source");
 }
diff --git a/tests/playwright-settlement-contract.test.ts b/tests/playwright-settlement-contract.test.ts
new file mode 100644
index 0000000000..8c3fe68009
--- /dev/null
+++ b/tests/playwright-settlement-contract.test.ts
@@ -0,0 +1,36 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+
+/**
+ * Ledger #093: Next streaming can leave a hidden duplicate page root. Bare
+ * `page.getByTestId(...)` then fails Playwright strict mode under full-suite
+ * load (Production UI shard 2 on PR #1729: `dsm-home-main` resolved to 2).
+ *
+ * Page-root / shell surfaces in `tests/ui-route-coverage.spec.ts` must go
+ * through `visibleByTestId` (or `expectSingleSettledOwner`) from
+ * `tests/playwright-settlement.ts`. This offline contract keeps that defect
+ * from returning as a red CI flake.
+ */
+const ROUTE_COVERAGE = "tests/ui-route-coverage.spec.ts";
+
+const PAGE_ROOT_TEST_IDS = [
+  "dsm-home-main",
+  "dsm-home-compare",
+  "dsm-comparison-page",
+  "dsm-differential-considerations-page",
+  "search-query-ribbon",
+] as const;
+
+describe("playwright settlement contract (#093)", () => {
+  it("ui-route-coverage scopes page-root testids through visibleByTestId", () => {
+    const source = readFileSync(ROUTE_COVERAGE, "utf8");
+    expect(source).toMatch(/import\s*\{[^}]*\bvisibleByTestId\b[^}]*\}\s*from\s*["']\.\/playwright-settlement["']/);
+
+    for (const testId of PAGE_ROOT_TEST_IDS) {
+      expect(source, `${testId} must use visibleByTestId`).toContain(`visibleByTestId(currentPage, "${testId}")`);
+      expect(source, `${testId} must not use bare getByTestId`).not.toMatch(
+        new RegExp(String.raw`getByTestId\(\s*["']${testId}["']\s*\)`),
+      );
+    }
+  });
+});
diff --git a/tests/ui-route-coverage.spec.ts b/tests/ui-route-coverage.spec.ts
index f73edff31d..0ee46e7556 100644
--- a/tests/ui-route-coverage.spec.ts
+++ b/tests/ui-route-coverage.spec.ts
@@ -9,6 +9,7 @@ import {
   getDifferentialRecord,
 } from "../src/lib/differentials";
 import { loadMedicationSnapshot } from "../src/lib/medication-snapshot";
+import { visibleByTestId } from "./playwright-settlement";
 
 const routeViewports = [
   { name: "desktop", width: 1280, height: 900 },
@@ -247,7 +248,7 @@ test.describe("previously uncovered production routes", () => {
         await expect(
           currentPage.getByRole("heading", { name: "Anxiety in outpatient care", level: 1, exact: true }),
         ).toBeVisible();
-        await expect(currentPage.getByTestId("search-query-ribbon")).toBeVisible();
+        await expect(visibleByTestId(currentPage, "search-query-ribbon")).toBeVisible();
         // The common-search pill lands on `/therapy-compass/search`, which is the
         // shared `ModeNav`. It portals into the header collapse host (outside
         // [data-therapy-root]), so read the canvas colour from the workspace root
@@ -279,11 +280,14 @@ test.describe("previously uncovered production routes", () => {
       page,
       "/dsm",
       async (currentPage) => {
-        await expect(currentPage.getByTestId("dsm-home-main")).toBeVisible();
+        // Scope to the visible owner: Next streaming can leave a hidden duplicate
+        // page root (#093), and bare getByTestId then fails Playwright strict mode
+        // (Production UI shard 2 on PR #1729).
+        await expect(visibleByTestId(currentPage, "dsm-home-main")).toBeVisible();
         await expect(currentPage.getByRole("heading", { name: "DSM-5 Diagnosis", level: 1 })).toBeVisible();
       },
       async (currentPage) => {
-        const compare = currentPage.getByTestId("dsm-home-compare");
+        const compare = visibleByTestId(currentPage, "dsm-home-compare");
         await expect(compare).toBeEnabled();
         await compare.click();
         await expect(currentPage).toHaveURL(/\/dsm\/compare$/);
@@ -297,7 +301,7 @@ test.describe("previously uncovered production routes", () => {
       page,
       "/dsm/compare?ids=major-depressive-disorder,bipolar-ii-disorder",
       async (currentPage) => {
-        await expect(currentPage.getByTestId("dsm-comparison-page")).toBeVisible();
+        await expect(visibleByTestId(currentPage, "dsm-comparison-page")).toBeVisible();
         await expect(currentPage.getByRole("heading", { name: "Compare DSM diagnoses", level: 1 })).toBeVisible();
       },
       async (currentPage) => {
@@ -317,7 +321,7 @@ test.describe("previously uncovered production routes", () => {
       page,
       "/dsm/diagnoses/major-depressive-disorder/differentials",
       async (currentPage) => {
-        await expect(currentPage.getByTestId("dsm-differential-considerations-page")).toBeVisible();
+        await expect(visibleByTestId(currentPage, "dsm-differential-considerations-page")).toBeVisible();
         await expect(currentPage.getByRole("heading", { name: "Major depressive disorder", level: 1 })).toBeVisible();
       },
       async (currentPage) => {
diff --git a/tests/ui-visual-baseline.spec.ts b/tests/ui-visual-baseline.spec.ts
index e167bcfab3..e82fb160b6 100644
--- a/tests/ui-visual-baseline.spec.ts
+++ b/tests/ui-visual-baseline.spec.ts
@@ -154,14 +154,7 @@ async function settle(page: Page, target: BaselineTarget): Promise<Locator> {
  * that adds the PNG. `declares no baseline it already has` below fails if the two
  * ever disagree, so the list cannot rot into a permanent exemption.
  */
-const AWAITING_BASELINE: ReadonlySet<string> = new Set([
-  "dashboard-shell",
-  "dashboard-shell-phone",
-  "search-results-band",
-  "search-results-band-phone",
-  "document-viewer",
-  "therapy-compass-home",
-]);
+const AWAITING_BASELINE: ReadonlySet<string> = new Set([]);
 
 /**
  * Where a candidate PNG is written when no baseline exists.