diff --git a/CHANGELOG.md b/CHANGELOG.md
index d49fe80a1..3f1823ec9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,45 @@
 # Changelog
 
+## [1.4.35.1] — 2026-05-17 — Auto-converging rollup backfill on worker boot
+
+Follow-on to v1.4.35. Removes the operator action that was implicit
+in the foundation release: instead of self-hosters having to run
+`pnpm tsx scripts/backfill-rollups.ts` after upgrading, the worker
+boot now discovers any account with measurements but no rollup
+coverage and enqueues a one-shot full fold via pg-boss. Idempotent
+across reboots (the discovery query only matches uncovered users) and
+zero reader-path impact (serial concurrency, runs in the background).
+
+### Boot-time backfill
+
+- **New `rollup-full-backfill` queue** (`ROLLUP_FULL_BACKFILL_QUEUE`,
+  concurrency = 1) carrying `{ userId, enqueuedAt }`. The handler
+  invokes `recomputeUserRollups(userId)` with the default 5-year
+  window across all four granularities — equivalent to the manual
+  CLI run, but inside the worker process so no `tsx` install
+  gymnastics in production images.
+- **`enqueueBootTimeRollupBackfill`** runs once at
+  `startReminderWorker` boot after every `boss.work` subscription is
+  in place. The discovery query finds users with at least one row in
+  `measurements` and zero rows in `measurement_rollups`, then sends
+  one job per uncovered account with `singletonKey:
+  boot-backfill|{userId}` so a fast restart while a fold is queued
+  doesn't pile up duplicates.
+- **Best-effort:** any error during discovery is captured in the
+  return value and logged through `workerLog`; the worker boot never
+  fails because the backfill missed.
+
+### Tests
+
+- 5 new unit cases pin the helper's contract (silent no-op without
+  boss, one job per uncovered user, singleton-key coalesce counted
+  as `skipped`, error surfacing, zero-users path). 2 new integration
+  cases verify against the real testcontainer: only the uncovered
+  user lands on the queue when a third already-folded user co-exists;
+  zero jobs enqueued when every account is already covered.
+- Unit suite 4280 → 4285. Integration suite 228 → 230. `pnpm
+  typecheck` + `pnpm lint` clean.
+
 ## [1.4.35] — 2026-05-17 — Persistent measurement rollups + partial read-swap
 
 Foundation release for the persistent `measurement_rollups` cache
diff --git a/package.json b/package.json
index e4ddb29d7..8b57e2d40 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "healthlog",
-  "version": "1.4.35",
+  "version": "1.4.35.1",
   "description": "Self-hosted personal-health-tracking PWA with Withings integration, AI insights, and doctor-report PDF export.",
   "license": "AGPL-3.0-only",
   "homepage": "https://healthlog.dev",
diff --git a/src/lib/jobs/reminder-worker.ts b/src/lib/jobs/reminder-worker.ts
index 282495861..0d0b76fd7 100644
--- a/src/lib/jobs/reminder-worker.ts
+++ b/src/lib/jobs/reminder-worker.ts
@@ -53,9 +53,13 @@ import {
   type AppleHealthImportPayload,
 } from "@/lib/jobs/apple-health-import-worker";
 import {
+  ROLLUP_FULL_BACKFILL_QUEUE,
+  ROLLUP_FULL_BACKFILL_CONCURRENCY,
   ROLLUP_RECOMPUTE_QUEUE,
   ROLLUP_RECOMPUTE_CONCURRENCY,
+  enqueueBootTimeRollupBackfill,
   recomputeUserRollups,
+  type RollupFullBackfillPayload,
   type RollupRecomputePayload,
 } from "@/lib/measurements/rollups";
 import { expireStaleInUseItems } from "@/lib/medications/inventory/service";
@@ -1466,6 +1470,7 @@ export async function startReminderWorker() {
     MEDICATION_INVENTORY_EXPIRE_QUEUE,
     APPLE_HEALTH_IMPORT_QUEUE,
     ROLLUP_RECOMPUTE_QUEUE,
+    ROLLUP_FULL_BACKFILL_QUEUE,
   ];
 
   for (const q of allQueues) {
@@ -1666,6 +1671,54 @@ export async function startReminderWorker() {
     },
   );
 
+  // v1.4.35.1 — boot-time full-fold worker. The boot enqueue helper
+  // below sends one job per uncovered user; this handler runs the
+  // full `recomputeUserRollups` against the default 5-year window
+  // across every granularity. Serial concurrency so the populator
+  // never crowds the dashboard request pool.
+  await boss.work<RollupFullBackfillPayload>(
+    ROLLUP_FULL_BACKFILL_QUEUE,
+    { localConcurrency: ROLLUP_FULL_BACKFILL_CONCURRENCY },
+    async (jobs) => {
+      for (const job of jobs) {
+        const { userId } = job.data;
+        const { rowsUpserted, durationMs } = await recomputeUserRollups(userId);
+        workerLog(
+          "info",
+          `[rollup-full-backfill] user=${userId} rows=${rowsUpserted} duration=${durationMs}ms`,
+        );
+      }
+    },
+  );
+
+  // v1.4.35.1 — fire-and-forget boot-time backfill discovery. Finds
+  // every user with measurements but no rollup coverage and enqueues
+  // a full-fold per account. Idempotent across reboots: the discovery
+  // query only matches accounts with zero rollup rows, so once a
+  // fold completes the user drops off the list. Errors are returned
+  // through the helper's result value — the worker boot never fails
+  // because of a backfill miss.
+  try {
+    const { enqueued, skipped, error } = await enqueueBootTimeRollupBackfill();
+    if (error) {
+      workerLog(
+        "error",
+        `[rollup-full-backfill] boot discovery failed: ${error}`,
+      );
+    } else if (enqueued > 0 || skipped > 0) {
+      workerLog(
+        "info",
+        `[rollup-full-backfill] boot discovery: enqueued=${enqueued} skipped=${skipped}`,
+      );
+    }
+  } catch (err) {
+    workerLog(
+      "error",
+      "[rollup-full-backfill] boot discovery threw an unexpected error",
+      err,
+    );
+  }
+
   return boss;
 }
 
diff --git a/src/lib/measurements/__tests__/rollups.test.ts b/src/lib/measurements/__tests__/rollups.test.ts
index 44eac9d2c..305ad249f 100644
--- a/src/lib/measurements/__tests__/rollups.test.ts
+++ b/src/lib/measurements/__tests__/rollups.test.ts
@@ -72,8 +72,10 @@ void mocks.findMany;
 void queryRaw;
 
 import {
+  ROLLUP_FULL_BACKFILL_QUEUE,
   ROLLUP_RECOMPUTE_QUEUE,
   collapseToTypeDayKeys,
+  enqueueBootTimeRollupBackfill,
   enqueueRollupRecompute,
   ensureUserRollupsFresh,
   recomputeBucketsForMeasurement,
@@ -280,3 +282,70 @@ describe("ensureUserRollupsFresh", () => {
     expect(result.recomputed).toBe(false);
   });
 });
+
+describe("enqueueBootTimeRollupBackfill", () => {
+  it("is a silent no-op when no boss is attached", async () => {
+    getGlobalBossMock.mockReturnValue(null);
+    const result = await enqueueBootTimeRollupBackfill();
+    expect(result).toEqual({ enqueued: 0, skipped: 0, error: null });
+    expect(queryRaw).not.toHaveBeenCalled();
+    expect(bossSend).not.toHaveBeenCalled();
+  });
+
+  it("enqueues one full-fold job per user who has measurements but no rollups", async () => {
+    getGlobalBossMock.mockReturnValue({ send: bossSend });
+    queryRaw.mockResolvedValueOnce([
+      { id: "user-a" },
+      { id: "user-b" },
+      { id: "user-c" },
+    ]);
+    bossSend
+      .mockResolvedValueOnce("job-a")
+      .mockResolvedValueOnce("job-b")
+      .mockResolvedValueOnce("job-c");
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    expect(result).toEqual({ enqueued: 3, skipped: 0, error: null });
+    expect(bossSend).toHaveBeenCalledTimes(3);
+    // The queue name is the boot-fold queue, not the per-bucket queue.
+    for (const call of bossSend.mock.calls) {
+      expect(call[0]).toBe(ROLLUP_FULL_BACKFILL_QUEUE);
+    }
+    // Singleton key per user — coalesces across rapid reboots.
+    expect(bossSend.mock.calls[0][2].singletonKey).toBe("boot-backfill|user-a");
+    expect(bossSend.mock.calls[1][2].singletonKey).toBe("boot-backfill|user-b");
+    expect(bossSend.mock.calls[2][2].singletonKey).toBe("boot-backfill|user-c");
+  });
+
+  it("counts a `boss.send` returning null as 'skipped' (singleton coalesce)", async () => {
+    getGlobalBossMock.mockReturnValue({ send: bossSend });
+    queryRaw.mockResolvedValueOnce([{ id: "user-a" }, { id: "user-b" }]);
+    bossSend.mockResolvedValueOnce(null).mockResolvedValueOnce("job-b");
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    expect(result).toEqual({ enqueued: 1, skipped: 1, error: null });
+  });
+
+  it("returns the error message when the discovery query throws", async () => {
+    getGlobalBossMock.mockReturnValue({ send: bossSend });
+    queryRaw.mockRejectedValueOnce(new Error("pool exhausted"));
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    expect(result.enqueued).toBe(0);
+    expect(result.error).toBe("pool exhausted");
+    expect(bossSend).not.toHaveBeenCalled();
+  });
+
+  it("returns { enqueued: 0 } when no users need backfill", async () => {
+    getGlobalBossMock.mockReturnValue({ send: bossSend });
+    queryRaw.mockResolvedValueOnce([]);
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    expect(result).toEqual({ enqueued: 0, skipped: 0, error: null });
+    expect(bossSend).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/lib/measurements/rollups.ts b/src/lib/measurements/rollups.ts
index fed8be94d..1f488f2e5 100644
--- a/src/lib/measurements/rollups.ts
+++ b/src/lib/measurements/rollups.ts
@@ -68,6 +68,28 @@ export interface RollupRecomputePayload {
   enqueuedAt: string;
 }
 
+/**
+ * v1.4.35.1 — boot-time full-fold queue. The write-path hooks keep
+ * the DAY bucket current per measurement, and `ensureUserRollupsFresh`
+ * warm-on-read covers the trailing 90-day DAY window on cold mount,
+ * but neither path folds the deep WEEK / MONTH / YEAR history for an
+ * account that has measurements pre-dating the v1.4.35 deploy. This
+ * queue exists so the worker boot can enqueue one full
+ * `recomputeUserRollups(userId)` per uncovered user — no operator
+ * action needed on self-hosted instances.
+ */
+export const ROLLUP_FULL_BACKFILL_QUEUE = "rollup-full-backfill";
+
+/** Boot-fold worker concurrency. Serial so we don't crowd the pool. */
+export const ROLLUP_FULL_BACKFILL_CONCURRENCY = 1;
+
+/** Payload the boot-time backfill helper enqueues. */
+export interface RollupFullBackfillPayload {
+  userId: string;
+  /** Wall-clock kick-off for debugging only. */
+  enqueuedAt: string;
+}
+
 /** Postgres `date_trunc` unit per granularity. */
 const DATE_TRUNC_UNIT: Record<RollupGranularity, string> = {
   DAY: "day",
@@ -600,6 +622,85 @@ export async function ensureUserRollupsFresh(
   }
 }
 
+/**
+ * v1.4.35.1 — boot-time enqueue helper. Finds users with measurements
+ * but zero rollup coverage and enqueues one full-fold job per account
+ * onto `ROLLUP_FULL_BACKFILL_QUEUE`. Designed to be called once at
+ * worker boot so every self-hosted instance auto-converges on the
+ * persistent rollup tier without operator intervention.
+ *
+ * Idempotent across reboots:
+ *   - the discovery query only matches accounts with no rollup rows at
+ *     all, so once the fold completes the user drops off the list and
+ *     subsequent boots skip them
+ *   - pg-boss `singletonKey` coalesces duplicate sends within the
+ *     queue, so a fast restart while a backfill is queued doesn't
+ *     double up
+ *
+ * Best-effort: errors are swallowed and reported through the return
+ * value so the worker boot never fails because of a backfill miss.
+ */
+export async function enqueueBootTimeRollupBackfill(): Promise<{
+  enqueued: number;
+  skipped: number;
+  error: string | null;
+}> {
+  const boss = getGlobalBoss();
+  if (!boss) {
+    return { enqueued: 0, skipped: 0, error: null };
+  }
+
+  try {
+    // Users with at least one measurement but no rollup row yet. The
+    // `LIMIT 1` inside each `EXISTS` keeps the planner from materialising
+    // the full child relation just to answer existence — important on
+    // power-user accounts with 100k+ measurements.
+    const users = await prisma.$queryRaw<Array<{ id: string }>>`
+      SELECT u."id"
+      FROM users u
+      WHERE EXISTS (
+        SELECT 1 FROM measurements m WHERE m."user_id" = u."id" LIMIT 1
+      )
+        AND NOT EXISTS (
+          SELECT 1 FROM measurement_rollups r WHERE r."user_id" = u."id" LIMIT 1
+        )
+    `;
+
+    if (users.length === 0) {
+      return { enqueued: 0, skipped: 0, error: null };
+    }
+
+    let enqueued = 0;
+    let skipped = 0;
+    for (const { id } of users) {
+      const payload: RollupFullBackfillPayload = {
+        userId: id,
+        enqueuedAt: new Date().toISOString(),
+      };
+      const jobId = await boss.send(ROLLUP_FULL_BACKFILL_QUEUE, payload, {
+        retryLimit: 3,
+        retryDelay: 60,
+        retryBackoff: true,
+        // Coalesce: if a backfill for this user is already queued and
+        // we restart, pg-boss returns null instead of duplicating.
+        singletonKey: `boot-backfill|${id}`,
+      });
+      if (jobId) {
+        enqueued += 1;
+      } else {
+        skipped += 1;
+      }
+    }
+    return { enqueued, skipped, error: null };
+  } catch (err) {
+    return {
+      enqueued: 0,
+      skipped: 0,
+      error: err instanceof Error ? err.message : String(err),
+    };
+  }
+}
+
 /**
  * Collapse a list of `(type, day)` keys to the set of distinct
  * `(type, dayStart)` pairs. Used by the batch-ingest hooks so a 500-
diff --git a/tests/integration/measurement-rollups.test.ts b/tests/integration/measurement-rollups.test.ts
index e10ee40a4..4b66cab29 100644
--- a/tests/integration/measurement-rollups.test.ts
+++ b/tests/integration/measurement-rollups.test.ts
@@ -27,6 +27,8 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 import {
+  ROLLUP_FULL_BACKFILL_QUEUE,
+  enqueueBootTimeRollupBackfill,
   recomputeBucketsForMeasurement,
   recomputeUserRollups,
   ALL_GRANULARITIES,
@@ -38,12 +40,25 @@ vi.mock("@/lib/db-compat", () => ({
   ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
 }));
 
+// Stub boss-instance with a vi.fn so we can swap the return per test.
+// The integration suite runs with `isolate: false`, so the mock state
+// is shared with sibling files (e.g. admin-backups-audit.test.ts also
+// mocks boss-instance). Re-setting the implementation inside
+// beforeEach restores our default before each case.
 vi.mock("@/lib/jobs/boss-instance", () => ({
-  getGlobalBoss: () => null, // no pg-boss in the test container
+  getGlobalBoss: vi.fn(() => null),
 }));
 
+import { getGlobalBoss } from "@/lib/jobs/boss-instance";
+
+const bossSend = vi.fn();
+
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
+  bossSend.mockReset();
+  // Default: pg-boss not attached. Individual tests that exercise the
+  // enqueue path override this with a stub that records sends.
+  vi.mocked(getGlobalBoss).mockReturnValue(null as never);
 });
 
 afterEach(() => {
@@ -503,4 +518,116 @@ describe("measurement rollups — integration", () => {
     // = 81.6667 → round2 = 81.67.
     expect(after.summaries.WEIGHT.mean).toBe(81.67);
   });
+
+  // ─── v1.4.35.1 boot-time backfill ──────────────────────────
+  //
+  // Self-hosted instances upgrading to v1.4.35 onwards must auto-
+  // converge on the persistent rollup tier without operator action.
+  // The discovery query matches users with measurements but zero
+  // rollup rows; one full-fold job is enqueued per such account.
+
+  it("enqueues one full-fold job per user with measurements but no rollups", async () => {
+    const prisma = getPrismaClient();
+    // Three users: two with measurements (one already-folded, one
+    // uncovered), one with no measurements at all (skipped entirely).
+    const covered = await prisma.user.create({
+      data: {
+        username: "boot-backfill-covered",
+        email: "boot-backfill-covered@example.test",
+        role: "USER",
+      },
+    });
+    const uncovered = await prisma.user.create({
+      data: {
+        username: "boot-backfill-uncovered",
+        email: "boot-backfill-uncovered@example.test",
+        role: "USER",
+      },
+    });
+    const empty = await prisma.user.create({
+      data: {
+        username: "boot-backfill-empty",
+        email: "boot-backfill-empty@example.test",
+        role: "USER",
+      },
+    });
+    void empty;
+
+    const measuredAt = new Date("2026-04-01T08:00:00.000Z");
+    await prisma.measurement.createMany({
+      data: [
+        {
+          userId: covered.id,
+          type: "WEIGHT",
+          value: 80,
+          unit: "kg",
+          source: "MANUAL",
+          measuredAt,
+        },
+        {
+          userId: uncovered.id,
+          type: "WEIGHT",
+          value: 80,
+          unit: "kg",
+          source: "MANUAL",
+          measuredAt,
+        },
+      ],
+    });
+
+    // Pre-fold the covered user so the discovery query skips them.
+    await recomputeUserRollups(covered.id, { granularities: ["DAY"] });
+
+    bossSend.mockResolvedValue("job-id");
+    vi.mocked(getGlobalBoss).mockReturnValue({ send: bossSend } as never);
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    // Only the uncovered user lands on the queue. The covered user
+    // already has DAY rollups; the empty user has no measurements.
+    expect(result.enqueued).toBe(1);
+    expect(result.skipped).toBe(0);
+    expect(result.error).toBeNull();
+    expect(bossSend).toHaveBeenCalledTimes(1);
+    expect(bossSend.mock.calls[0][0]).toBe(ROLLUP_FULL_BACKFILL_QUEUE);
+    expect(bossSend.mock.calls[0][1]).toMatchObject({ userId: uncovered.id });
+    expect(bossSend.mock.calls[0][2].singletonKey).toBe(
+      `boot-backfill|${uncovered.id}`,
+    );
+
+    // Reset boss stub for downstream tests.
+    vi.mocked(getGlobalBoss).mockReturnValue(null as never);
+  });
+
+  it("returns { enqueued: 0 } when every user is already covered", async () => {
+    const prisma = getPrismaClient();
+    const user = await prisma.user.create({
+      data: {
+        username: "boot-backfill-allcovered",
+        email: "boot-backfill-allcovered@example.test",
+        role: "USER",
+      },
+    });
+    await prisma.measurement.create({
+      data: {
+        userId: user.id,
+        type: "WEIGHT",
+        value: 80,
+        unit: "kg",
+        source: "MANUAL",
+        measuredAt: new Date("2026-04-01T08:00:00.000Z"),
+      },
+    });
+    await recomputeUserRollups(user.id, { granularities: ["DAY"] });
+
+    bossSend.mockResolvedValue("job-id");
+    vi.mocked(getGlobalBoss).mockReturnValue({ send: bossSend } as never);
+
+    const result = await enqueueBootTimeRollupBackfill();
+
+    expect(result.enqueued).toBe(0);
+    expect(bossSend).not.toHaveBeenCalled();
+
+    vi.mocked(getGlobalBoss).mockReturnValue(null as never);
+  });
 });