@@ -0,0 +1,47 @@
+---
+'@objectstack/cli': minor
+'@objectstack/service-settings': minor
+---
+
+feat(cli): `os secret rewrap` re-wraps version-1 `sys_secret` ciphertext under the current AAD derivation, each row under its holder's producer scope (ADR-0128 §4.2, #21326 stage 2)
+
+Clause-②: yes (widening)
+
+A ciphertext sealed before ADR-0128 D1–D3 carries the older binding over
+`(namespace, key)` alone, and still opens in this release. `os secret rewrap` moves
+the stored values to the current binding through `rotateKey`, the seam ADR-0128 §4
+names. It is an operator command: a dry run by default, `--apply` to write, and
+nothing on any boot or upgrade path invokes it. It has no HTTP surface.
+
+- **The scope comes from the holder.** `sys_secret` records no producer, and a
+  version-1 ciphertext binds no scope, so each row is re-sealed under the scope of
+  the producer whose holder references it: `settings` for a `sys_setting.value_enc`
+  handle, `object_secret_field` for a `secret:` ref on a business row,
+  `datasource_credential` for a `sys_secret:` `credentialsRef`. The holders come from
+  the same cross-producer reference union `os secret orphans` reads. A row nothing
+  references, a row whose holders belong to different producers, and every row while
+  a holder family could not be read are left as they are and counted, never re-sealed
+  under a guessed scope. `--apply` refuses an incomplete union and names the family.
+- **Resumable.** A row already sealed under the current derivation is skipped as
+  done, so a stopped run finishes the rest when re-run and a finished run writes
+  nothing.
+- **Safe against a live deployment.** Each row is written by one conditional update,
+  keyed on its id and the ciphertext the run read. A row a producer changed in
+  between is not overwritten, and a re-run picks it up. A driver with no
+  `updateMany` is refused before any row is opened.
+- **Fails closed.** A row that does not open, or whose re-seal does not open to the
+  same plaintext under the same scope, is not written. The run finishes the rest and
+  exits 1. The check happens before the write.
+- **Output is classes and counts only.** It never prints a plaintext, a ciphertext
+  or a row id.
+
+The command resolves its data key from `OS_SECRET_KEY`, `OS_DEV_CRYPTO_KEY` or the
+persisted key file, in the strict posture: it never mints a key, and it hands the
+settings service it boots the same provider so that service does not mint one
+either. With no key it refuses before opening any row.
+
+`@objectstack/service-settings` publishes `ciphertextDerivationStatus` (and its
+`CiphertextDerivationStatus` type). It is `LocalCryptoProvider`'s own reading of
+which derivation sealed a stored ciphertext, read off its marker without opening it:
+`current`, `superseded` or `unknown`. The re-wrap classifies rows with it rather than
+restating the marker grammar.
@@ -577,6 +577,54 @@ named afterwards: the export carries the cipher material, is written owner-only,
 read back and checked before any row is removed. Keep it until you are certain.
 </Callout>
 
+#### `os secret rewrap`
+
+Re-wraps the `sys_secret` ciphertext sealed before secrets were bound to the producer
+that wrote them, so it carries the current binding (ADR-0128). Each row is re-sealed
+under the scope of the producer whose holder references it: a setting, an object's
+`secret` field, or a datasource credential. **A dry run by default: without `--apply`
+it writes nothing.** It is never run for you; nothing on any boot or upgrade path
+invokes it.
+
+```bash
+os secret rewrap --no-declared-datasources            # dry run (writes nothing)
+os secret rewrap --json --no-declared-datasources     # the same, machine-readable
+os secret rewrap --declared-datasources ./datasources.json
+os secret rewrap --apply --no-declared-datasources    # write the re-wrapped rows
+```
+
+**Options:**
+- `--apply` — write the re-wrapped rows (default off)
+- `--declared-datasources <path>` — JSON file (an array, or `{"datasources": [...]}`) of the datasource artefacts this host declares in code
+- `--no-declared-datasources` — state that this host declares none
+- `-y, --yes` — skip the confirmation prompt
+- `--database-url <url>`, `--json`
+
+Run it with the data key the deployment seals with (`OS_SECRET_KEY`, or the persisted
+key file). It never mints a key, and with none it refuses before opening any row.
+
+What a run guarantees:
+
+- **The scope comes from the holder, never from a guess.** A row that nothing
+  references, a row whose holders belong to different producers, and every row while a
+  holder family could not be read are **left as they are** and counted. Like
+  `os secret orphans`, it reads all three holder families, and a host that says nothing
+  about its code-declared datasources leaves that family a gap. `--apply` then refuses
+  and names the family.
+- **Resumable.** A row already sealed under the current binding is skipped as done. A run
+  that stopped part-way finishes the rest when re-run, and a finished run writes nothing.
+- **Safe against a live deployment.** Each row is written in one statement, and only if
+  it still holds the ciphertext the run read. A row a producer changed during the run is
+  not overwritten. It is counted, and a re-run picks it up.
+- **Fails closed.** A row that does not open, or whose re-seal does not open to the same
+  value under the same scope, is not written. The run finishes the rest and exits 1.
+
+The dry run opens, re-seals and verifies every attributed row in memory, so its counts
+are the ones `--apply` would produce. Output is classes and counts only: re-wrap,
+done, left (orphan, conflicting scope, union incomplete), refused (unreadable, unknown
+derivation, verify failed) and, under `--apply`, not written (changed during the run,
+write failed). It never prints a value, a ciphertext or a row id.
+
 ### Build & Validate
 
 | Command | Description |
 
@@ -0,0 +1,276 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * ADR-0128 §4.2 — `os secret rewrap` against the CONCRETE driver its own boot
+ * resolves, end to end.
+ *
+ * The planner's pins (`utils/sys-secret-rewrap.test.ts`) run over a driver
+ * double. Two facts are only true or false of the real store, so they are read
+ * here, through `bootSchemaStack` with the command's own plugin list, against
+ * a real SQLite file:
+ *
+ *  - **The conditional write really is conditional.** `updateMany` keyed on
+ *    `id` AND the ciphertext the run read answers 0, and changes nothing,
+ *    when the stored ciphertext is any other value. It answers 1 when it is
+ *    the same. Live-safety rests on exactly this, and a driver that ignored
+ *    one `where` key would overwrite a producer's concurrent value.
+ *  - **The command end to end.** The dry run writes nothing (the whole table
+ *    is read back unchanged). `--apply` re-wraps exactly the attributable
+ *    version-1 rows, under their holders' scopes, and leaves the orphan
+ *    byte-for-byte as it was. A second `--apply` is all `done` and writes
+ *    nothing.
+ *
+ * The version-1 rows are sealed here as every release before ADR-0128 sealed
+ * them, under the key this file hands the run in `OS_SECRET_KEY`.
+ */
+
+import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
+import { createCipheriv, randomBytes } from 'node:crypto';
+import { existsSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { dirname, join, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { PlatformObjectsPlugin } from '@objectstack/platform-objects/plugin';
+import { ciphertextDerivationStatus, LocalCryptoProvider, SettingsServicePlugin } from '@objectstack/service-settings';
+import type { CryptoContext } from '@objectstack/spec/contracts';
+import { bootSchemaStack, type SchemaStack } from '../../utils/schema-migrate.js';
+import type { SecretReferenceEngineLike } from '../../utils/secret-reference-union.js';
+import SecretRewrap from './rewrap.js';
+
+const HERE = dirname(fileURLToPath(import.meta.url));
+const CLI_ROOT = resolve(HERE, '..', '..', '..');
+
+/** Env that would point the boot at another database or another state directory. */
+const OVERRIDING_ENV = ['OS_DATABASE_URL', 'DATABASE_URL', 'TURSO_DATABASE_URL', 'OS_DATABASE_DRIVER', 'OS_HOME'] as const;
+
+type Row = Record<string, unknown>;
+
+interface DriverProbe {
+  find(object: string, query: Row): Promise<Row[]>;
+  create(object: string, data: Row): Promise<unknown>;
+  updateMany(object: string, query: Row, data: Row): Promise<number>;
+}
+
+const KEY = randomBytes(32);
+
+function sealVersion1(plain: string, namespace: string, key: string): string {
+  const iv = randomBytes(12);
+  const cipher = createCipheriv('aes-256-gcm', KEY, iv);
+  cipher.setAAD(Buffer.from([namespace, key].join('|'), 'utf8'));
+  const enc = Buffer.concat([cipher.update(plain, 'utf8'), cipher.final()]);
+  return Buffer.concat([iv, cipher.getAuthTag(), enc]).toString('base64');
+}
+
+const v1Row = (id: string, namespace: string, key: string, plain: string): Row => ({
+  id, namespace, key, alg: 'aes-256-gcm', version: 1, kms_key_id: 'local:v1',
+  ciphertext: sealVersion1(plain, namespace, key),
+});
+
+/** Held by a setting. */
+const SETTINGS_ROW = v1Row('sec_rewrap_dc_settings', 'smtp', 'password', 'dc-settings-plain');
+/** Held by a datasource the host declares in code. */
+const DATASOURCE_ROW = v1Row('sec_rewrap_dc_datasource', 'datasource', 'warehouse', 'dc-datasource-plain');
+/** Held by nothing. */
+const ORPHAN_ROW = v1Row('sec_rewrap_dc_orphan', 'smtp', 'retired_token', 'dc-orphan-plain');
+/** A row only the conditional-write probe touches. */
+const PROBE_ROW = v1Row('sec_rewrap_dc_probe', 'probe', 'probe', 'dc-probe-plain');
+
+describe('os secret rewrap — the concrete driver and the command, end to end (ADR-0128 §4.2)', () => {
+  let dir: string;
+  let dbFile: string;
+  let declaredFile: string;
+  let stack: SchemaStack | null = null;
+  let secretDriver: DriverProbe;
+  const savedEnv: Record<string, string | undefined> = {};
+  const savedCwd = process.cwd();
+
+  beforeAll(async () => {
+    dir = mkdtempSync(join(tmpdir(), 'os-rewrap-dc-'));
+    dbFile = join(dir, 'rewrap.db');
+    declaredFile = join(dir, 'datasources.json');
+
+    for (const key of OVERRIDING_ENV) {
+      savedEnv[key] = process.env[key];
+      delete process.env[key];
+    }
+    for (const key of ['OS_ARTIFACT_PATH', 'NODE_ENV', 'OS_SECRET_KEY'] as const) savedEnv[key] = process.env[key];
+    process.env.OS_ARTIFACT_PATH = join(dir, 'dist', 'objectstack.json');
+    process.env.NODE_ENV = 'production';
+    process.env.OS_SECRET_KEY = KEY.toString('hex');
+    process.chdir(dir);
+
+    stack = await bootSchemaStack({
+      jsonOutput: false,
+      databaseUrl: `file:${dbFile}`,
+      // Byte-identical to `rewrap.ts`'s own list.
+      extraPlugins: [new PlatformObjectsPlugin(), new SettingsServicePlugin({ registerRoutes: false })],
+    });
+    const engine = stack.kernel.getService('objectql') as SecretReferenceEngineLike | undefined;
+    if (!engine) throw new Error('no objectql engine on the booted stack — nothing to measure');
+    secretDriver = engine.getDriverForObject('sys_secret') as unknown as DriverProbe;
+    const settingDriver = engine.getDriverForObject('sys_setting') as unknown as DriverProbe;
+    if (!secretDriver || !settingDriver) throw new Error('sys_secret / sys_setting resolved no driver');
+
+    for (const row of [SETTINGS_ROW, DATASOURCE_ROW, ORPHAN_ROW, PROBE_ROW]) {
+      await secretDriver.create('sys_secret', { ...row });
+    }
+    await settingDriver.create('sys_setting', { namespace: 'smtp', key: 'password', value_enc: SETTINGS_ROW.id });
+    writeFileSync(declaredFile, JSON.stringify([
+      { name: 'warehouse', external: { credentialsRef: `sys_secret:${String(DATASOURCE_ROW.id)}` } },
+    ]));
+  }, 180_000);
+
+  afterAll(async () => {
+    try { await stack?.shutdown(); } catch { /* torn down either way */ }
+    stack = null;
+    process.chdir(savedCwd);
+    for (const [key, value] of Object.entries(savedEnv)) {
+      if (value === undefined) delete process.env[key];
+      else process.env[key] = value;
+    }
+    try { rmSync(dir, { recursive: true, force: true }); } catch { /* ignore */ }
+  });
+
+  const rowOf = async (id: unknown): Promise<Row> => {
+    const [row] = await secretDriver.find('sys_secret', { where: { id } });
+    if (!row) throw new Error(`sys_secret row ${String(id)} is gone`);
+    return row;
+  };
+
+  const runJson = async (argv: string[]): Promise<{ payload: Record<string, any>; exitCode: number }> => {
+    const chunks: string[] = [];
+    const stdout = vi.spyOn(process.stdout, 'write').mockImplementation(
+      ((chunk: unknown, ...rest: unknown[]) => {
+        chunks.push(String(chunk));
+        const done = rest.find((a) => typeof a === 'function') as ((e?: Error | null) => void) | undefined;
+        done?.(null);
+        return true;
+      }) as never,
+    );
+    const savedExitCode = process.exitCode;
+    let exitCode = 0;
+    try {
+      await SecretRewrap.run(['--json', '--database-url', `file:${dbFile}`, ...argv], { root: CLI_ROOT });
+      exitCode = Number(process.exitCode ?? 0);
+    } finally {
+      stdout.mockRestore();
+      process.exitCode = savedExitCode;
+    }
+    const lines = chunks.join('').split('\n').filter((l) => l.trim() !== '');
+    return { payload: JSON.parse(lines[lines.length - 1]) as Record<string, any>, exitCode };
+  };
+
+  it('names the concrete driver behind the write', () => {
+    expect((secretDriver as unknown as { name?: unknown }).name).toBe('com.objectstack.driver.sql');
+    expect(typeof secretDriver.updateMany).toBe('function');
+  });
+
+  it('the conditional write is conditional: a stale ciphertext changes nothing, the read one changes the row', async () => {
+    const before = await rowOf(PROBE_ROW.id);
+
+    const stale = await secretDriver.updateMany(
+      'sys_secret',
+      { where: { id: PROBE_ROW.id, ciphertext: 'v2:a-value-this-run-never-read' } },
+      { ciphertext: 'v2:must-not-land', version: 99 },
+    );
+    expect(stale).toBe(0);
+    const unchanged = await rowOf(PROBE_ROW.id);
+    expect(unchanged.ciphertext).toBe(before.ciphertext);
+    expect(Number(unchanged.version)).toBe(Number(before.version));
+
+    // POSITIVE CONTROL: the same statement keyed on the ciphertext actually stored.
+    const matched = await secretDriver.updateMany(
+      'sys_secret',
+      { where: { id: PROBE_ROW.id, ciphertext: before.ciphertext } },
+      { kms_key_id: 'local:v1' },
+    );
+    expect(matched).toBe(1);
+  }, 60_000);
+
+  it('the dry run writes nothing, and counts what --apply would do', async () => {
+    const before = await secretDriver.find('sys_secret', {});
+    const { payload, exitCode } = await runJson(['--declared-datasources', declaredFile]);
+
+    expect(payload.error, JSON.stringify(payload).slice(0, 400)).toBeUndefined();
+    expect(payload.mode).toBe('dry-run');
+    expect(payload.report.families.settings.status).toBe('enumerated');
+    expect(payload.report.families.datasource.status).toBe('enumerated');
+    expect(payload.report.byClass).toMatchObject({ rewrap: 2, left_orphan: 2, done: 0 });
+    expect(payload.report.rewrapByScope).toEqual({ settings: 1, object_secret_field: 0, datasource_credential: 1 });
+    expect(exitCode).toBe(0);
+    expect(await secretDriver.find('sys_secret', {})).toEqual(before);
+  }, 180_000);
+
+  it('with no data key, the run refuses before opening a row, and NO provider in its boot mints one', async () => {
+    // A development posture with no key anywhere: the posture in which a
+    // default provider mints a key file. The settings service the boot
+    // composes is handed this run's provider, so nothing may mint here.
+    const home = mkdtempSync(join(tmpdir(), 'os-rewrap-nokey-'));
+    const saved = { NODE_ENV: process.env.NODE_ENV, OS_SECRET_KEY: process.env.OS_SECRET_KEY, OS_HOME: process.env.OS_HOME };
+    process.env.NODE_ENV = 'development';
+    delete process.env.OS_SECRET_KEY;
+    process.env.OS_HOME = home;
+    try {
+      const before = await secretDriver.find('sys_secret', {});
+      const { payload, exitCode } = await runJson(['--declared-datasources', declaredFile]);
+
+      expect(payload.error, JSON.stringify(payload).slice(0, 400)).toBe('crypto_key_unavailable');
+      expect(exitCode).toBe(1);
+      expect(existsSync(join(home, 'dev-crypto-key'))).toBe(false);
+      expect(await secretDriver.find('sys_secret', {})).toEqual(before);
+
+      // POSITIVE CONTROL for the measurement: a default-posture provider in the
+      // same kind of home does mint, so an absent file above means none did.
+      const control = mkdtempSync(join(tmpdir(), 'os-rewrap-mint-'));
+      try {
+        new LocalCryptoProvider({ env: { OS_HOME: control }, mode: 'development' });
+        expect(existsSync(join(control, 'dev-crypto-key'))).toBe(true);
+      } finally {
+        rmSync(control, { recursive: true, force: true });
+      }
+    } finally {
+      for (const [key, value] of Object.entries(saved)) {
+        if (value === undefined) delete process.env[key];
+        else process.env[key] = value;
+      }
+      rmSync(home, { recursive: true, force: true });
+    }
+  }, 180_000);
+
+  it('--apply re-wraps each held row under its holder\'s scope, leaves the orphan as it was, and a re-run is all done', async () => {
+    const orphanBefore = await rowOf(ORPHAN_ROW.id);
+    const { payload, exitCode } = await runJson(['--apply', '--yes', '--declared-datasources', declaredFile]);
+
+    expect(payload.error, JSON.stringify(payload).slice(0, 400)).toBeUndefined();
+    expect(payload.report.byClass).toMatchObject({ rewrap: 2, left_orphan: 2, write_conflict: 0, write_failed: 0 });
+    expect(exitCode).toBe(0);
+
+    const provider = new LocalCryptoProvider({ key: KEY });
+    const opens = async (row: Row, ctx: CryptoContext) => {
+      const stored = await rowOf(row.id);
+      expect(ciphertextDerivationStatus(stored.ciphertext)).toBe('current');
+      return provider.decrypt({
+        id: String(stored.id), kmsKeyId: String(stored.kms_key_id), alg: String(stored.alg),
+        version: Number(stored.version), ciphertext: String(stored.ciphertext),
+      }, ctx);
+    };
+    expect(await opens(SETTINGS_ROW, { scope: 'settings', namespace: 'smtp', key: 'password' }))
+      .toBe('dc-settings-plain');
+    expect(await opens(DATASOURCE_ROW, { scope: 'datasource_credential', namespace: 'datasource', key: 'warehouse' }))
+      .toBe('dc-datasource-plain');
+    // Bound to its holder's scope: another producer's context does not open it.
+    await expect(opens(DATASOURCE_ROW, { scope: 'settings', namespace: 'datasource', key: 'warehouse' })).rejects.toThrow();
+
+    // The orphan is exactly as it was.
+    const orphanAfter = await rowOf(ORPHAN_ROW.id);
+    expect(orphanAfter.ciphertext).toBe(orphanBefore.ciphertext);
+    expect(Number(orphanAfter.version)).toBe(Number(orphanBefore.version));
+
+    // Re-run: everything held is done, nothing is written.
+    const tableBefore = await secretDriver.find('sys_secret', {});
+    const again = await runJson(['--apply', '--yes', '--declared-datasources', declaredFile]);
+    expect(again.payload.report.byClass).toMatchObject({ rewrap: 0, done: 2, left_orphan: 2 });
+    expect(again.exitCode).toBe(0);
+    expect(await secretDriver.find('sys_secret', {})).toEqual(tableBefore);
+  }, 180_000);
+});