diff --git a/src/lib/insights/__tests__/bmi-status.test.ts b/src/lib/insights/__tests__/bmi-status.test.ts
index 251f7b56f..2926ca251 100644
--- a/src/lib/insights/__tests__/bmi-status.test.ts
+++ b/src/lib/insights/__tests__/bmi-status.test.ts
@@ -4,7 +4,8 @@ vi.mock("@/lib/db", () => ({
   prisma: {
     user: { findUnique: vi.fn() },
     auditLog: { findFirst: vi.fn(), create: vi.fn() },
-    measurement: { findMany: vi.fn() },
+    // v1.18.11 (P6) — the input gate probes salient inputs via groupBy.
+    measurement: { findMany: vi.fn(), groupBy: vi.fn() },
     measurementRollup: { findMany: vi.fn() },
   },
 }));
@@ -50,6 +51,10 @@ beforeEach(() => {
   // Cold rollup tier: the BMI graded series scales the WEIGHT tier, which
   // folds from the full-history `measurement.findMany` fallback on a miss.
   vi.mocked(prisma.measurementRollup.findMany).mockResolvedValue([] as never);
+  // v1.18.11 (P6) — input-gate probe default: empty groups so the fingerprint
+  // is computed but, with no cached `inputHash`, the gate misses and fixtures
+  // build normally. The forced fixtures skip the gate entirely.
+  vi.mocked(prisma.measurement.groupBy).mockResolvedValue([] as never);
 });
 
 describe("generateBmiStatusForUser — graded payload", () => {
diff --git a/src/lib/insights/__tests__/payload-budget.test.ts b/src/lib/insights/__tests__/payload-budget.test.ts
index 4a10c5acd..a98b0a349 100644
--- a/src/lib/insights/__tests__/payload-budget.test.ts
+++ b/src/lib/insights/__tests__/payload-budget.test.ts
@@ -16,10 +16,11 @@ vi.mock("@/lib/db", () => ({
   prisma: {
     user: { findUnique: vi.fn() },
     auditLog: { findFirst: vi.fn(), create: vi.fn() },
-    measurement: { findMany: vi.fn() },
+    // v1.18.11 (P6) — the slow-mover input gate probes salient inputs.
+    measurement: { findMany: vi.fn(), groupBy: vi.fn() },
     measurementRollup: { findMany: vi.fn() },
     medicationIntakeEvent: { findMany: vi.fn() },
-    moodEntry: { findMany: vi.fn() },
+    moodEntry: { findMany: vi.fn(), aggregate: vi.fn() },
   },
 }));
 
@@ -76,6 +77,13 @@ beforeEach(() => {
     [] as never,
   );
   vi.mocked(prisma.measurementRollup.findMany).mockResolvedValue([] as never);
+  // v1.18.11 (P6) — input-gate probe: empty groups + zero mood so the gate
+  // misses (no cached inputHash) and every fixture builds normally.
+  vi.mocked(prisma.measurement.groupBy).mockResolvedValue([] as never);
+  vi.mocked(prisma.moodEntry.aggregate).mockResolvedValue({
+    _count: { _all: 0 },
+    _max: { moodLoggedAt: null },
+  } as never);
   vi.mocked(prisma.user.findUnique).mockResolvedValue({
     dateOfBirth: null,
     gender: null,
diff --git a/src/lib/insights/__tests__/status-cache.test.ts b/src/lib/insights/__tests__/status-cache.test.ts
index b87c734c0..9257c6dcc 100644
--- a/src/lib/insights/__tests__/status-cache.test.ts
+++ b/src/lib/insights/__tests__/status-cache.test.ts
@@ -3,6 +3,9 @@ import { describe, expect, it, vi, beforeEach } from "vitest";
 vi.mock("@/lib/db", () => ({
   prisma: {
     auditLog: { findFirst: vi.fn(), findMany: vi.fn(), create: vi.fn() },
+    // v1.18.11 (P6) — the input gate / fingerprint probe salient inputs.
+    measurement: { groupBy: vi.fn() },
+    moodEntry: { aggregate: vi.fn() },
   },
 }));
 
@@ -21,6 +24,8 @@ vi.mock("@/lib/jobs/insight-status-generate-shared", () => ({
 
 import { prisma } from "@/lib/db";
 import {
+  computeStatusInputFingerprint,
+  gateUnchangedStatusInput,
   isTimeoutStub,
   readFreshStatusText,
   refreshUnchangedStatusInsight,
@@ -400,3 +405,177 @@ describe("refreshUnchangedStatusInsight (v1.16.8)", () => {
     expect(prisma.auditLog.create).not.toHaveBeenCalled();
   });
 });
+
+describe("computeStatusInputFingerprint (v1.18.11 P6)", () => {
+  beforeEach(() => {
+    statusConsentBlocksGeneration.mockResolvedValue(false);
+  });
+
+  it("is stable across group order and flips when a count or newest moves", async () => {
+    const t0 = new Date("2026-05-30T08:00:00.000Z");
+    vi.mocked(prisma.measurement.groupBy).mockResolvedValue([
+      { type: "WEIGHT", _count: { _all: 10 }, _max: { measuredAt: t0 } },
+      {
+        type: "BLOOD_PRESSURE_SYS",
+        _count: { _all: 3 },
+        _max: { measuredAt: t0 },
+      },
+    ] as never);
+    const a = await computeStatusInputFingerprint({
+      userId: "u1",
+      types: ["WEIGHT", "BLOOD_PRESSURE_SYS"],
+    });
+
+    // Same data, reversed group order → identical fingerprint.
+    vi.mocked(prisma.measurement.groupBy).mockResolvedValue([
+      {
+        type: "BLOOD_PRESSURE_SYS",
+        _count: { _all: 3 },
+        _max: { measuredAt: t0 },
+      },
+      { type: "WEIGHT", _count: { _all: 10 }, _max: { measuredAt: t0 } },
+    ] as never);
+    const b = await computeStatusInputFingerprint({
+      userId: "u1",
+      types: ["WEIGHT", "BLOOD_PRESSURE_SYS"],
+    });
+    expect(b).toBe(a);
+
+    // One more reading → count moves → fingerprint flips.
+    vi.mocked(prisma.measurement.groupBy).mockResolvedValue([
+      { type: "WEIGHT", _count: { _all: 11 }, _max: { measuredAt: t0 } },
+      {
+        type: "BLOOD_PRESSURE_SYS",
+        _count: { _all: 3 },
+        _max: { measuredAt: t0 },
+      },
+    ] as never);
+    const c = await computeStatusInputFingerprint({
+      userId: "u1",
+      types: ["WEIGHT", "BLOOD_PRESSURE_SYS"],
+    });
+    expect(c).not.toBe(a);
+  });
+
+  it("folds mood and extra inputs into the hash when requested", async () => {
+    vi.mocked(prisma.measurement.groupBy).mockResolvedValue([
+      {
+        type: "WEIGHT",
+        _count: { _all: 5 },
+        _max: { measuredAt: new Date("2026-05-30T08:00:00.000Z") },
+      },
+    ] as never);
+    vi.mocked(prisma.moodEntry.aggregate).mockResolvedValue({
+      _count: { _all: 2 },
+      _max: { moodLoggedAt: new Date("2026-05-29T20:00:00.000Z") },
+    } as never);
+
+    const withMood = await computeStatusInputFingerprint({
+      userId: "u1",
+      types: ["WEIGHT"],
+      includeMood: true,
+    });
+    const heightChanged = await computeStatusInputFingerprint({
+      userId: "u1",
+      types: ["WEIGHT"],
+      includeMood: true,
+      extra: { heightCm: 180 },
+    });
+    expect(heightChanged).not.toBe(withMood);
+    // moodEntry.aggregate is only queried when includeMood is set.
+    await computeStatusInputFingerprint({ userId: "u1", types: ["WEIGHT"] });
+    expect(prisma.moodEntry.aggregate).toHaveBeenCalledTimes(2);
+  });
+});
+
+describe("gateUnchangedStatusInput (v1.18.11 P6)", () => {
+  const INPUT = "b".repeat(64);
+
+  beforeEach(() => {
+    statusConsentBlocksGeneration.mockResolvedValue(false);
+  });
+
+  it("re-stamps the cached text and skips the build on a matching input hash", async () => {
+    const created = new Date("2026-05-31T02:00:00.000Z");
+    vi.mocked(prisma.auditLog.findFirst).mockResolvedValue(
+      cacheRow({
+        dateKey: "2026-05-30",
+        text: "Stable weight.",
+        model: "gpt-4o-mini",
+        inputHash: INPUT,
+        snapshotHash: "c".repeat(64),
+      }) as never,
+    );
+    vi.mocked(prisma.auditLog.create).mockResolvedValue({
+      createdAt: created,
+    } as never);
+
+    const hit = await gateUnchangedStatusInput({
+      userId: "u1",
+      cacheAction: "insights.weight-status.en",
+      todayKey: TODAY,
+      inputHash: INPUT,
+      force: false,
+    });
+    expect(hit?.text).toBe("Stable weight.");
+    const persisted = JSON.parse(
+      (
+        vi.mocked(prisma.auditLog.create).mock.calls[0][0] as {
+          data: { details: string };
+        }
+      ).data.details,
+    ) as { dateKey: string; inputHash: string; snapshotHash: string };
+    expect(persisted.dateKey).toBe(TODAY);
+    // The prior fingerprints are preserved so the next day's gates match.
+    expect(persisted.inputHash).toBe(INPUT);
+    expect(persisted.snapshotHash).toBe("c".repeat(64));
+  });
+
+  it("misses on a differing or missing input hash (caller builds)", async () => {
+    vi.mocked(prisma.auditLog.findFirst).mockResolvedValue(
+      cacheRow({
+        dateKey: "2026-05-30",
+        text: "Stable weight.",
+        model: "gpt-4o-mini",
+        // no inputHash on the row
+      }) as never,
+    );
+    expect(
+      await gateUnchangedStatusInput({
+        userId: "u1",
+        cacheAction: "insights.weight-status.en",
+        todayKey: TODAY,
+        inputHash: INPUT,
+        force: false,
+      }),
+    ).toBeNull();
+    expect(prisma.auditLog.create).not.toHaveBeenCalled();
+  });
+
+  it("misses on a forced run without touching the cache", async () => {
+    expect(
+      await gateUnchangedStatusInput({
+        userId: "u1",
+        cacheAction: "insights.weight-status.en",
+        todayKey: TODAY,
+        inputHash: INPUT,
+        force: true,
+      }),
+    ).toBeNull();
+    expect(prisma.auditLog.findFirst).not.toHaveBeenCalled();
+  });
+
+  it("misses when the server-managed consent gate would block (no stale re-date)", async () => {
+    statusConsentBlocksGeneration.mockResolvedValue(true);
+    expect(
+      await gateUnchangedStatusInput({
+        userId: "u1",
+        cacheAction: "insights.weight-status.en",
+        todayKey: TODAY,
+        inputHash: INPUT,
+        force: false,
+      }),
+    ).toBeNull();
+    expect(prisma.auditLog.create).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/lib/insights/__tests__/weight-status.test.ts b/src/lib/insights/__tests__/weight-status.test.ts
index 1fea27ab2..9c4469606 100644
--- a/src/lib/insights/__tests__/weight-status.test.ts
+++ b/src/lib/insights/__tests__/weight-status.test.ts
@@ -3,9 +3,11 @@ import { describe, expect, it, vi, beforeEach } from "vitest";
 vi.mock("@/lib/db", () => ({
   prisma: {
     auditLog: { findFirst: vi.fn(), create: vi.fn() },
-    measurement: { findMany: vi.fn() },
+    // v1.18.11 (P6) — the input gate probes salient inputs via groupBy +
+    // moodEntry.aggregate before the heavy findMany build.
+    measurement: { findMany: vi.fn(), groupBy: vi.fn() },
     measurementRollup: { findMany: vi.fn() },
-    moodEntry: { findMany: vi.fn() },
+    moodEntry: { findMany: vi.fn(), aggregate: vi.fn() },
     // v1.11.1 — the rollup readers lazy-load the user's
     // `sourcePriorityJson` via `loadUserSourcePriority`. `null` here →
     // default rank ladders.
@@ -55,6 +57,15 @@ beforeEach(() => {
   vi.mocked(prisma.measurementRollup.findMany).mockResolvedValue([] as never);
   // v1.11.1 — null source-priority blob → default rank ladders.
   vi.mocked(prisma.user.findUnique).mockResolvedValue(null as never);
+  // v1.18.11 (P6) — input-gate probe. Default to empty groups + zero mood so
+  // the fingerprint is computed but, with no cached `inputHash`, the gate
+  // misses and every fixture proceeds to its normal build. Tests that
+  // exercise the gate set these explicitly.
+  vi.mocked(prisma.measurement.groupBy).mockResolvedValue([] as never);
+  vi.mocked(prisma.moodEntry.aggregate).mockResolvedValue({
+    _count: { _all: 0 },
+    _max: { moodLoggedAt: null },
+  } as never);
 });
 
 describe("generateWeightStatusForUser — graded payload", () => {
diff --git a/src/lib/insights/bmi-status.ts b/src/lib/insights/bmi-status.ts
index 51ee25ad2..231359f9a 100644
--- a/src/lib/insights/bmi-status.ts
+++ b/src/lib/insights/bmi-status.ts
@@ -28,6 +28,8 @@ import {
   summarizeSeries,
 } from "@/lib/insights/status-shared";
 import {
+  computeStatusInputFingerprint,
+  gateUnchangedStatusInput,
   readFreshStatusText,
   refreshUnchangedStatusInsight,
   resolveReadOnlyStatusMiss,
@@ -176,6 +178,38 @@ export async function prepareBmiStatusForUser(
     };
   }
 
+  // v1.18.11 (P6) — input gate for this slow-moving metric. The snapshot
+  // derives from WEIGHT rows and the profile heightCm; a cheap probe over
+  // both fingerprints the inputs, so a non-forced unchanged week re-stamps
+  // the cached assessment and skips the whole build (findMany + BMI series +
+  // provider). A forced run never gates but still records a current
+  // fingerprint for the next day's gate.
+  const inputHash = await computeStatusInputFingerprint({
+    userId,
+    types: ["WEIGHT"],
+    extra: { heightCm: user.heightCm },
+  });
+  if (!force) {
+    const unchangedInput = await gateUnchangedStatusInput({
+      userId,
+      cacheAction,
+      todayKey,
+      inputHash,
+      force,
+    });
+    if (unchangedInput) {
+      return {
+        phase: "served",
+        result: {
+          hasProvider: true,
+          text: unchangedInput.text,
+          cached: true,
+          updatedAt: unchangedInput.updatedAt,
+        },
+      };
+    }
+  }
+
   // v1.4.28 FB-D2 — cap the snapshot input (weight runs at most once
   // per day for typical users; 365 covers a full year while the
   // downstream payload budget trims further).
@@ -404,6 +438,8 @@ export async function prepareBmiStatusForUser(
         model: outcome.model,
         tokensUsed: outcome.tokensUsed,
         snapshotHash,
+        // v1.18.11 (P6) — persist the input fingerprint for tomorrow's gate.
+        inputHash,
       });
       return {
         hasProvider: true,
diff --git a/src/lib/insights/status-cache.ts b/src/lib/insights/status-cache.ts
index 67db6e30d..28d2021c8 100644
--- a/src/lib/insights/status-cache.ts
+++ b/src/lib/insights/status-cache.ts
@@ -1,3 +1,4 @@
+import type { MeasurementType } from "@/generated/prisma/client";
 import { prisma } from "@/lib/db";
 import {
   hasUsableStatusProvider,
@@ -7,6 +8,7 @@ import {
   enqueueStatusGeneration,
   type InsightStatusScope,
 } from "@/lib/jobs/insight-status-generate-shared";
+import { hashInsightSnapshot } from "@/lib/insights/snapshot-hash";
 import { annotate } from "@/lib/logging/context";
 
 /**
@@ -57,6 +59,8 @@ interface ParsedStatusCache {
   retryAt?: string;
   /** v1.16.8 — fingerprint of the data snapshot the text was generated from. */
   snapshotHash?: string;
+  /** v1.18.11 (P6) — cheap fingerprint of the salient inputs (count + newest). */
+  inputHash?: string;
 }
 
 /**
@@ -198,6 +202,157 @@ export async function refreshUnchangedStatusInsight(args: {
   return { text: parsed.text, updatedAt: created.createdAt.toISOString() };
 }
 
+/**
+ * v1.18.11 (P6) — cheap input fingerprint for the slow-moving status
+ * metrics (weight / BMI).
+ *
+ * The post-build content-hash gate (`refreshUnchangedStatusInsight`)
+ * already skips the LLM on unchanged data, but it only runs AFTER the heavy
+ * snapshot build (the bounded `findMany` + per-series rollup reads +
+ * correlation math). For metrics that move on a weekly cadence that rebuild
+ * is paid six days out of seven for nothing.
+ *
+ * This probe answers "did any salient input change since the cached
+ * assessment?" with ONE grouped query — per salient type, the live row
+ * `count` plus the newest `measuredAt`. A new or removed reading flips one
+ * of those, which flips the hash; an idle day leaves it byte-identical. The
+ * caller hashes the result and, on a match, skips the entire build. The
+ * finer post-build snapshot gate stays in place for the cases this coarse
+ * probe can't see (e.g. an in-place edit that keeps count + newest stamp).
+ */
+export async function computeStatusInputFingerprint(args: {
+  userId: string;
+  types: readonly MeasurementType[];
+  /**
+   * v1.18.11 (P6) — include the mood-entry table in the fingerprint. The
+   * weight snapshot folds a mood-context block, so a mood change must flip
+   * the input hash or the gate would skip a build whose prose could have
+   * moved. Omit for metrics that don't read mood.
+   */
+  includeMood?: boolean;
+  /**
+   * v1.18.11 (P6) — extra non-measurement inputs the snapshot derives from
+   * (e.g. BMI reads the profile `heightCm`). Folded into the hash so a
+   * change to one of them flips the gate. Values must be JSON-stable.
+   */
+  extra?: Record<string, string | number | null>;
+}): Promise<string> {
+  const [grouped, mood] = await Promise.all([
+    prisma.measurement.groupBy({
+      by: ["type"],
+      where: {
+        userId: args.userId,
+        type: { in: [...args.types] },
+        deletedAt: null,
+      },
+      _count: { _all: true },
+      _max: { measuredAt: true },
+    }),
+    args.includeMood
+      ? prisma.moodEntry.aggregate({
+          where: { userId: args.userId },
+          _count: { _all: true },
+          _max: { moodLoggedAt: true },
+        })
+      : Promise.resolve(null),
+  ]);
+  // Deterministic shape regardless of group order: sort by type, project a
+  // stable `{ type, count, newest }` triple. `hashInsightSnapshot` sorts keys
+  // and collapses Date → ISO, so the hash is order- and clock-stable.
+  const fingerprint = grouped
+    .map((row) => ({
+      type: row.type,
+      count: row._count._all,
+      newest: row._max.measuredAt ? row._max.measuredAt.toISOString() : null,
+    }))
+    .sort((a, b) => (a.type < b.type ? -1 : a.type > b.type ? 1 : 0));
+  return hashInsightSnapshot({
+    statusInput: fingerprint,
+    ...(mood
+      ? {
+          mood: {
+            count: mood._count._all,
+            newest: mood._max.moodLoggedAt
+              ? mood._max.moodLoggedAt.toISOString()
+              : null,
+          },
+        }
+      : {}),
+    ...(args.extra ? { extra: args.extra } : {}),
+  });
+}
+
+/**
+ * v1.18.11 (P6) — the INPUT gate for slow-moving status metrics.
+ *
+ * Runs BEFORE the snapshot build. When the latest cached assessment is a
+ * real (non-stub) text whose stored `inputHash` equals the freshly probed
+ * one, nothing the prompt could see has changed, so the gate re-stamps that
+ * text under today's `dateKey` and returns it — the caller then skips the
+ * whole gather AND the provider call. Returns `null` on any miss (no prior
+ * row, stub, empty text, missing or differing `inputHash`, or a forced
+ * regeneration), in which case the caller proceeds to the normal build +
+ * the finer post-build content-hash gate.
+ *
+ * Consent is checked first, mirroring `refreshUnchangedStatusInsight`:
+ * re-dating a cached text presents it as current, so a user who revoked the
+ * server-managed AI consent must never have stale text re-stamped by an
+ * unchanged-input refresh.
+ */
+export async function gateUnchangedStatusInput(args: {
+  userId: string;
+  cacheAction: string;
+  todayKey: string;
+  inputHash: string;
+  force: boolean;
+}): Promise<FreshStatusCacheHit | null> {
+  if (args.force) return null;
+
+  if (await statusConsentBlocksGeneration(args.userId, "insights")) {
+    annotate({
+      action: { name: "insights.status.consent_required" },
+      meta: { cache_action: args.cacheAction, gate: "unchanged-input" },
+    });
+    return null;
+  }
+
+  const latest = await prisma.auditLog.findFirst({
+    where: { userId: args.userId, action: args.cacheAction },
+    orderBy: { createdAt: "desc" },
+    select: { details: true },
+  });
+  if (!latest?.details) return null;
+
+  let parsed: ParsedStatusCache;
+  try {
+    parsed = JSON.parse(latest.details) as ParsedStatusCache;
+  } catch {
+    return null;
+  }
+  if (isTimeoutStub(parsed)) return null;
+  if (typeof parsed.text !== "string" || parsed.text.trim().length === 0) {
+    return null;
+  }
+  if (!parsed.inputHash || parsed.inputHash !== args.inputHash) return null;
+
+  // Same inputs, valid text — re-stamp the day key WITHOUT rebuilding the
+  // snapshot or calling the provider. Preserve every field (incl. the prior
+  // `snapshotHash` + `inputHash`) so the next day's gates still match.
+  const created = await prisma.auditLog.create({
+    data: {
+      userId: args.userId,
+      action: args.cacheAction,
+      details: JSON.stringify({ ...parsed, dateKey: args.todayKey }),
+    },
+    select: { createdAt: true },
+  });
+  annotate({
+    action: { name: "insights.status.skipped_unchanged" },
+    meta: { cache_action: args.cacheAction, gate: "input" },
+  });
+  return { text: parsed.text, updatedAt: created.createdAt.toISOString() };
+}
+
 export interface LastGoodStatusHit {
   text: string;
   updatedAt: string;
diff --git a/src/lib/insights/status-shared.ts b/src/lib/insights/status-shared.ts
index 7e6f4ad7b..3113926e5 100644
--- a/src/lib/insights/status-shared.ts
+++ b/src/lib/insights/status-shared.ts
@@ -173,6 +173,15 @@ export async function persistStatusInsight(args: {
    * provider call when nothing changed.
    */
   snapshotHash?: string;
+  /**
+   * v1.18.11 (P6) — cheap fingerprint of the SALIENT INPUTS (per-type
+   * count + newest measuredAt) for slow-moving metrics. The input gate
+   * compares a freshly probed fingerprint against this BEFORE the heavy
+   * snapshot build, so a no-change day for weight/BMI skips the whole
+   * gather (not just the provider call). Absent on metrics that don't
+   * opt into the input gate.
+   */
+  inputHash?: string;
 }): Promise<string> {
   const created = await prisma.auditLog.create({
     data: {
@@ -186,6 +195,7 @@ export async function persistStatusInsight(args: {
         model: args.model,
         tokensUsed: args.tokensUsed,
         ...(args.snapshotHash ? { snapshotHash: args.snapshotHash } : {}),
+        ...(args.inputHash ? { inputHash: args.inputHash } : {}),
       }),
     },
     select: { createdAt: true },
diff --git a/src/lib/insights/weight-status.ts b/src/lib/insights/weight-status.ts
index 2608c870b..7a2c43499 100644
--- a/src/lib/insights/weight-status.ts
+++ b/src/lib/insights/weight-status.ts
@@ -39,6 +39,8 @@ import {
   summarizeSeries,
 } from "@/lib/insights/status-shared";
 import {
+  computeStatusInputFingerprint,
+  gateUnchangedStatusInput,
   readFreshStatusText,
   refreshUnchangedStatusInsight,
   resolveReadOnlyStatusMiss,
@@ -212,6 +214,40 @@ export async function prepareWeightStatusForUser(
     };
   }
 
+  // v1.18.11 (P6) — input gate for this slow-moving metric. A cheap grouped
+  // probe over the salient inputs (weight + BP channels + mood) fingerprints
+  // what the snapshot would read. On a non-forced run with an unchanged
+  // fingerprint the cached assessment is re-stamped under today's key and the
+  // whole heavy build below (bounded findMany + per-series rollup reads +
+  // correlation math + the provider call) is skipped. A forced run never
+  // gates — but still computes the fingerprint so the persisted row carries a
+  // current one for the next day's gate.
+  const inputHash = await computeStatusInputFingerprint({
+    userId,
+    types: ["WEIGHT", "BLOOD_PRESSURE_SYS", "BLOOD_PRESSURE_DIA"],
+    includeMood: true,
+  });
+  if (!force) {
+    const unchangedInput = await gateUnchangedStatusInput({
+      userId,
+      cacheAction,
+      todayKey,
+      inputHash,
+      force,
+    });
+    if (unchangedInput) {
+      return {
+        phase: "served",
+        result: {
+          hasProvider: true,
+          text: unchangedInput.text,
+          cached: true,
+          updatedAt: unchangedInput.updatedAt,
+        },
+      };
+    }
+  }
+
   // v1.4.28 FB-D2 — cap the snapshot input. BP captures three types
   // per day so 1095 = 365 d × 3 channels. Order desc + reverse so we
   // keep the most recent year of rows.
@@ -591,6 +627,9 @@ export async function prepareWeightStatusForUser(
         model: outcome.model,
         tokensUsed: outcome.tokensUsed,
         snapshotHash,
+        // v1.18.11 (P6) — persist the input fingerprint so tomorrow's input
+        // gate can skip the rebuild when nothing salient changed.
+        inputHash,
       });
       return {
         hasProvider: true,