diff --git a/e2e/settings-score.spec.ts b/e2e/settings-score.spec.ts
index 9909ead1f..399bd9f2e 100644
--- a/e2e/settings-score.spec.ts
+++ b/e2e/settings-score.spec.ts
@@ -2,6 +2,8 @@ import { expect, test } from "./setup/test";
 
 import { STORAGE_STATE_PATH } from "./setup/global-setup";
 import { settleBeforeMeasure } from "./utils/settle";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
+import { healthScoreAlgorithmItemKey } from "@/lib/daily/priority-item-key";
 
 /**
  * Settings → Health Score: the surface that decides which pillars count.
@@ -65,11 +67,14 @@ function scoreReport() {
     ],
     delta: null,
     deltaReason: "no_current_score",
-    scoreVersion: 2,
+    scoreVersion: SCORE_VERSION,
     weightGoal: insufficient("no_goal"),
     // Raised and never dismissed, which is the state every account is in:
     // nothing has ever rendered this notice.
-    algorithmNotice: { itemKey: "health_score_algorithm:2", dismissed: false },
+    algorithmNotice: {
+      itemKey: healthScoreAlgorithmItemKey(SCORE_VERSION),
+      dismissed: false,
+    },
   };
 }
 
@@ -223,7 +228,7 @@ test.describe("Settings → Health Score", () => {
     await notice.locator('[data-slot="score-change-notice-dismiss"]').click();
 
     await expect(notice).toHaveCount(0);
-    expect(dismissed).toBe("health_score_algorithm:2");
+    expect(dismissed).toBe(healthScoreAlgorithmItemKey(SCORE_VERSION));
   });
 
   test("refuses a selection too narrow to produce a score, in plain language", async ({
diff --git a/e2e/utils/mock-populated-insights.ts b/e2e/utils/mock-populated-insights.ts
index 266efdc2d..f54147906 100644
--- a/e2e/utils/mock-populated-insights.ts
+++ b/e2e/utils/mock-populated-insights.ts
@@ -4,6 +4,7 @@ import {
   SECTION_MOBILITY,
   SECTION_VITALS,
 } from "@/components/insights/derived/use-dashboard-derived";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
 
 /**
  * A POPULATED Insights overview fixture.
@@ -170,7 +171,7 @@ const HEALTH_SCORE = {
       composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP", "ADIPOSITY"],
       configured: false,
       noiseFloor: 3,
-      scoreVersion: 2,
+      scoreVersion: SCORE_VERSION,
     },
     coverage: coverage(),
     confidence: confidence(),
@@ -187,7 +188,7 @@ const HEALTH_SCORE = {
   ],
   delta: 2,
   deltaReason: null,
-  scoreVersion: 2,
+  scoreVersion: SCORE_VERSION,
   weightGoal: {
     status: "ok" as const,
     value: {
diff --git a/e2e/v1341-ui-evidence.spec.ts b/e2e/v1341-ui-evidence.spec.ts
index 6eea31bf5..6448d3472 100644
--- a/e2e/v1341-ui-evidence.spec.ts
+++ b/e2e/v1341-ui-evidence.spec.ts
@@ -2,6 +2,7 @@ import { mkdir } from "node:fs/promises";
 import { join } from "node:path";
 import type { Page, TestInfo } from "@playwright/test";
 import type { DailyDigest } from "@/lib/daily/digest";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
 
 import { expect, test } from "./setup/test";
 import { STORAGE_STATE_PATH } from "./setup/global-setup";
@@ -23,7 +24,7 @@ const NARRATIVE_DIGEST: DailyDigest = {
     band: "green",
     delta: -2,
     deltaReason: null,
-    scoreVersion: 2,
+    scoreVersion: SCORE_VERSION,
     composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
   },
   topSignal: LONG_HEADLINE_BRIEFING.signalsOfDay?.[0] ?? null,
diff --git a/src/app/api/admin/backups/[id]/restore/__tests__/round-trip.test.ts b/src/app/api/admin/backups/[id]/restore/__tests__/round-trip.test.ts
index 1305d3123..88bc30426 100644
--- a/src/app/api/admin/backups/[id]/restore/__tests__/round-trip.test.ts
+++ b/src/app/api/admin/backups/[id]/restore/__tests__/round-trip.test.ts
@@ -22,6 +22,8 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 import { NextRequest } from "next/server";
 import { Buffer } from "node:buffer";
 
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
+
 process.env.ENCRYPTION_KEY =
   "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef";
 
@@ -269,7 +271,7 @@ function sourceClient() {
           timezone: "Europe/Berlin",
           composite: 76,
           band: "yellow",
-          scoreVersion: 2,
+          scoreVersion: SCORE_VERSION,
           composition: ["BLOOD_PRESSURE", "SLEEP", "ADIPOSITY"],
           pillarScores: { BLOOD_PRESSURE: 86, SLEEP: 100, ADIPOSITY: 42 },
           inputFingerprint: "a".repeat(64),
@@ -629,7 +631,7 @@ describe("backup round trip — export, wire schema, restore", () => {
       timezone: "Europe/Berlin",
       composite: 76,
       band: "yellow",
-      scoreVersion: 2,
+      scoreVersion: SCORE_VERSION,
       inputFingerprint: "a".repeat(64),
     });
     // The composition and the per-pillar scores are what keep the stored day
diff --git a/src/app/api/daily/digest/__tests__/route.test.ts b/src/app/api/daily/digest/__tests__/route.test.ts
index 28ca64f05..4ae9ddb1a 100644
--- a/src/app/api/daily/digest/__tests__/route.test.ts
+++ b/src/app/api/daily/digest/__tests__/route.test.ts
@@ -3,6 +3,7 @@ import { NextRequest } from "next/server";
 
 import { apiError } from "@/lib/api-response";
 import type { DailyDigest } from "@/lib/daily/digest";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
 
 /**
  * `GET /api/daily/digest` — the P3 read seam.
@@ -63,7 +64,7 @@ const DIGEST: DailyDigest = {
     band: "good",
     delta: 3,
     deltaReason: null,
-    scoreVersion: 2,
+    scoreVersion: SCORE_VERSION,
     composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
   },
   topSignal: null,
diff --git a/src/components/daily/__tests__/today-hero.test.tsx b/src/components/daily/__tests__/today-hero.test.tsx
index 00ca9ccc4..5be773a7e 100644
--- a/src/components/daily/__tests__/today-hero.test.tsx
+++ b/src/components/daily/__tests__/today-hero.test.tsx
@@ -6,6 +6,7 @@ import { I18nProvider } from "@/lib/i18n/context";
 import { TodayHero } from "../today-hero";
 import type { DailyDigest } from "@/lib/daily/digest";
 import type { PriorityItem } from "@/lib/daily/priority-item";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
 
 // The hero now wires the coach check-in card's keep / let-go taps through
 // `useCoachCheckinAction`, so it needs a QueryClient in the tree.
@@ -57,7 +58,7 @@ function digest(over: Partial<DailyDigest> = {}): DailyDigest {
       band: "green",
       delta: 3,
       deltaReason: null,
-      scoreVersion: 2,
+      scoreVersion: SCORE_VERSION,
       composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
     },
     topSignal: {
@@ -114,7 +115,7 @@ describe("<TodayHero>", () => {
             band: "green",
             delta: 20,
             deltaReason: "algorithm_changed",
-            scoreVersion: 2,
+            scoreVersion: SCORE_VERSION,
             composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
           },
         })}
diff --git a/src/lib/analytics/score/__tests__/record.test.ts b/src/lib/analytics/score/__tests__/record.test.ts
index 2d92f5a91..b0b05c480 100644
--- a/src/lib/analytics/score/__tests__/record.test.ts
+++ b/src/lib/analytics/score/__tests__/record.test.ts
@@ -144,8 +144,12 @@ describe("stored bands", () => {
 });
 
 describe("input fingerprint", () => {
+  // The fixture only needs two DIFFERENT version markers to prove the
+  // fingerprint is sensitive to a version move — pinned relative to
+  // SCORE_VERSION so the pair stays "previous vs current" rather than
+  // going stale (or colliding) the next time the constant bumps.
   const base = {
-    scoreVersion: 1,
+    scoreVersion: SCORE_VERSION - 1,
     composition: ["BLOOD_PRESSURE", "SLEEP", "ADIPOSITY"] as ScorePillarId[],
     pillars: HEALTHY,
   };
@@ -157,9 +161,9 @@ describe("input fingerprint", () => {
   });
 
   it("moves when the algorithm version moves", () => {
-    expect(healthScoreInputFingerprint({ ...base, scoreVersion: 2 })).not.toBe(
-      healthScoreInputFingerprint(base),
-    );
+    expect(
+      healthScoreInputFingerprint({ ...base, scoreVersion: SCORE_VERSION }),
+    ).not.toBe(healthScoreInputFingerprint(base));
   });
 
   it("moves when the composition narrows", () => {
diff --git a/src/lib/dashboard/__tests__/snapshot.test.ts b/src/lib/dashboard/__tests__/snapshot.test.ts
index 8077c2b43..fb6dacf08 100644
--- a/src/lib/dashboard/__tests__/snapshot.test.ts
+++ b/src/lib/dashboard/__tests__/snapshot.test.ts
@@ -77,7 +77,7 @@ vi.mock("@/lib/analytics/score/reader", () => ({
             bandSetter: "BLOOD_PRESSURE" as const,
             composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"] as const,
             noiseFloor: 2,
-            scoreVersion: 2 as const,
+            scoreVersion: SCORE_VERSION,
           },
           coverage,
           confidence: { score: 100, band: "high" as const },
@@ -94,7 +94,7 @@ vi.mock("@/lib/analytics/score/reader", () => ({
       pillars: [],
       delta: legacy?.delta ?? null,
       deltaReason: null,
-      scoreVersion: 2 as const,
+      scoreVersion: SCORE_VERSION,
       weightGoal: {
         status: "insufficient" as const,
         coverage,
@@ -154,6 +154,7 @@ import {
 } from "../snapshot";
 import type { ModuleKey } from "@/lib/modules/gate";
 import { MODULE_KEYS } from "@/lib/modules/registry";
+import { SCORE_VERSION } from "@/lib/analytics/score/types";
 
 const emptySummary = {
   count: 0,
@@ -370,7 +371,7 @@ describe("buildDashboardSnapshot — per-type thick-phase gate", () => {
       confidence: { score: 100, band: "high" },
       composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
       deltaReason: null,
-      scoreVersion: 2,
+      scoreVersion: SCORE_VERSION,
       bandSetter: "BLOOD_PRESSURE",
       // v1.21.2 (A5 / A6) — additive narrative fields, null absent a
       // disagreeing readiness set / a returned metric (the fake derived
@@ -516,7 +517,7 @@ describe("buildDashboardSnapshot — healthScore (warm phase only)", () => {
       confidence: { score: 100, band: "high" },
       composition: ["BLOOD_PRESSURE", "ACTIVITY", "SLEEP"],
       deltaReason: null,
-      scoreVersion: 2,
+      scoreVersion: SCORE_VERSION,
       bandSetter: "BLOOD_PRESSURE",
       // v1.21.2 (A5 / A6) — additive narrative fields, null here.
       tension: null,