objectstack-ai
diff --git a/‎.changeset/19332-g2a-fieldgroups-indexes-form-rows.md‎
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diff --git a/‎.changeset/20432-skipped-index-durability.md‎
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diff --git a/‎packages/cli/src/utils/artifact-boot-migration.unbuildable-index.test.ts‎
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@@ -10,7 +10,7 @@ Two live structured object keys are authorable in the metadata form: `fieldGroup
 - `fieldGroups` (Basics, beside `highlightFields`) — six sub-rows, one per canonical group key: `key` and `label` (required text), `icon` (text), `description` (textarea), `collapse` (a `none` / `expanded` / `collapsed` select) and `visibleWhen` (`type: 'code'`, `language: 'expression'`, the `fields` grid's predicate rows). The three `[DEPRECATED → collapse]` aliases (`defaultExpanded`, `collapsible`, `collapsed`) are **not** offered; the metadata-form reconciliation ledger records a nested `omit` row for each. The parse still accepts them and derives `collapse` from one only when `collapse` is absent, so a stored entry keeps its meaning, and a `collapse` set in the form outranks any alias it carries.
 - `indexes` (Advanced, beside `datasource`) — three sub-rows over the keys the SQL driver reads: `name` (text), `fields` (`widget: 'string-tags'`, required) and `unique`, a select offering **only** `global` and `organization`. The deprecated bare `unique: true` is never offered: a schema-derived control would take the union's first arm and render a switch that writes it. An edit merges into the stored entry, so an index that already carries `true` or `false` keeps it until the author picks a scope, and the select can write only the two values the parse accepts. `type` and `partial` are tombstones and have no row.
 
-The help text states what the runtime does with each value. `indexes[].fields` is free text, and no authoring door judges its names: not the schema parse, not the publish door, not `os validate`. A name that is not a stored column makes the SQL driver skip the whole index at sync with a warning in the server log, and the help text says exactly that. A field group has no field-name list: a field joins a group through its own `group` key.
+The help text states what the runtime does with each value. `indexes[].fields` is free text, and the schema parse, so a draft save, does not judge its names; `os validate`, `os build`, `os lint` and the publish door refuse a name that is not a field of the object (`object-field-ref-unknown`, #20479, in the same release). A name that is not a stored column, a `formula` field say, makes the SQL driver skip the whole index at sync with an error in the server log, and the help text says exactly that; `os migrate plan` reports the skipped index too (#20432, in the same release). A field group has no field-name list: a field joins a group through its own `group` key.
 
 The two row schemas also carry a JSON Schema `title` on every property, as every repeater row schema must: `IndexSchema` on `name`, `fields` and `unique`, and `ObjectFieldGroupSchema` on its nine keys, the three deprecated aliases included. A property panel that reads the served schema's titles therefore shows a named column instead of a raw key. Each title is a `.meta({ title })` call and nothing more.
 
 
@@ -0,0 +1,63 @@
+---
+'@objectstack/driver-sql': minor
+'@objectstack/spec': patch
+'@objectstack/platform-objects': patch
+'@objectstack/lint': patch
+---
+
+fix(driver-sql): a declared index that can never be built is logged at `error` and reported in drift
+
+**Clause-②: yes (widening)**: the exported `DriftOp` union gains one member, `unbuildable_index`.
+No accept set changes. Nothing an author could write before is refused now.
+
+A declared index names a column that no declaration will ever create when:
+
+- the name is not a field of the object, for example a misspelling that the Studio save door
+  admits (`os validate` / `os build` already refuse it); or
+- the name is a virtual `formula` field, which is computed on read and has no column. The same
+  applies to a field-level `unique` on a formula field.
+
+The SQL driver skips such an index at every sync. It used to say so at `warn`, and the drift
+report dropped the index from the expected set, so `os migrate plan` showed nothing. For a
+`unique` index, the declared constraint was not enforced and duplicate rows were accepted,
+while everything looked normal.
+
+- **The sync logs the skip at `error`**, on the same durability channel as the duplicate-row
+  refusals in the same loop. One line per skipped index per sync names the object, the index,
+  each missing column with its reason (not a field of the object, or a formula field), and
+  whether the index is `UNIQUE`. The structured meta carries `index`, `missing` and `unique`.
+- **Drift reports it** as a report-only entry: `kind: 'index_mismatch'`, `actual: '(absent)'`,
+  `category: 'needs_confirm'`, `severity: 'error'` for a unique index and `'warning'` otherwise.
+  Its op is the new member:
+
+  ```ts
+  { type: 'unbuildable_index'; table: string; column?: string; indexName: string;
+    unique: boolean; missingColumns: string[] }
+  ```
+
+  `missingColumns` lists only the columns that will never materialize. A declared column that
+  is merely not added yet is pending additive work, not this finding.
+
+**What a consumer that reads `op.type` now sees.** A new value, `'unbuildable_index'`. It has
+no reconciler arm, and none can exist, because there is no column to build over. The remedy is
+a metadata edit. It is in `INDEX_DRIFT_OPS`, so `isIndexDriftOp` answers `true` and it never
+triggers a SQLite table rebuild. `applyMigrationEntries` reports it `skipped` on every dialect.
+`os migrate plan` lists it under "Needs confirmation", addressed by its index name. `os migrate
+apply` counts it like any `needs_confirm` entry (so it asks for `--yes`), and then reports it
+skipped. The artifact-pinned boot warns about it and still starts, because
+only `destructive` entries refuse a boot. A `switch` over `op.type` that treats unknown values
+as "not applied" needs no change. An exhaustive `switch` with a `never` check gets one more case
+to handle.
+
+**The object form's help text follows.** The `indexes` → Fields help in the Studio object form
+said the skip left "a warning in the server log". It now says an error, in English and in the
+zh-CN, ja-JP and es-ES translations. Nothing else in the text changes.
+
+**The lint message follows too.** `object-field-ref-unknown`, on a misspelt `indexes[].fields`
+name, said the SQL driver skips the index "with only a warning, and drift drops it too". It now
+says the skip is logged at error and `os migrate plan` reports the index as unbuildable. The rule,
+its severity and its prescription are unchanged.
+
+**Upgrade note:** on a database that already carries such an index, `os migrate plan` now
+reports one entry per index, and so does the boot's drift warning. That entry clears only when
+the metadata names stored fields or drops the index.
@@ -0,0 +1,126 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * [#20432] What the CLI does with the driver's new report-only drift op,
+ * `unbuildable_index`: a declared index that can never be built, because a key
+ * column is not a field of the object or is a virtual `formula` field.
+ *
+ * ## Why this lives in `packages/cli`
+ *
+ * The driver owns the entry. The CLI owns the three places it lands:
+ *
+ *   - `os migrate plan` renders it through `renderPlan` / `driftTarget`, which
+ *     read `category`, `op.indexName`, `op.type` and `message` generically.
+ *     This file proves that the new op needs no CLI source change to be shown.
+ *   - `os migrate apply` hands it to `applyMigrationEntries`, which reports it
+ *     `skipped`: there is no reconciler arm, and none can exist.
+ *   - The artifact-pinned boot gate applies every non-destructive entry and
+ *     refuses the boot only on `category === 'destructive'`. A report-only
+ *     entry must WARN and let the boot continue. Refusing would take down
+ *     every deployment carrying a misspelt index column at `kernel:ready`,
+ *     over a declaration that no DDL can repair. That is the same asymmetry
+ *     `artifact-boot-migration.report-only-drift.test.ts` pins for
+ *     `manual_column_type_change`.
+ *
+ * Every entry here comes from the REAL driver (an in-memory SQLite
+ * `SqlDriver`) and goes through the REAL gate and renderer. A hand-stamped
+ * entry would stay green on the day the driver starts emitting the op as
+ * `destructive`, because nothing would connect the two.
+ *
+ * ⚠️ `@objectstack/driver-sql` resolves through its `exports` to its **dist**
+ * (no `resolve.alias` for it in this package, deliberately), so this file
+ * reads the BUILT driver. A stale `dist/` makes it a verdict about build
+ * state. The value import also puts it in the `integration` tier
+ * (`vitest-tiers.ts`, KERNEL).
+ */
+
+import { describe, it, expect, afterEach, vi } from 'vitest';
+import { SqlDriver, buildIndexName } from '@objectstack/driver-sql';
+import { runArtifactBootMigrationGate } from './artifact-boot-migration.js';
+import { driftTarget, groupByCategory, renderPlan, type SqlDriverLike } from './schema-migrate.js';
+
+const T = 'os20432_boot';
+const INDEX = buildIndexName(T, ['statsu'], true);
+
+/** A table whose only real column is `status`, declaring a UNIQUE over the misspelling `statsu`. */
+const OBJECT = {
+  name: T,
+  tenancy: { enabled: false },
+  fields: { status: { type: 'text', maxLength: 64 } },
+  indexes: [{ fields: ['statsu'], unique: true as const }],
+};
+
+async function syncedDriver(): Promise<SqlDriver> {
+  const driver = new SqlDriver({ client: 'better-sqlite3', connection: { filename: ':memory:' }, useNullAsDefault: true });
+  // Quiet: the driver's own error line is pinned in driver-sql. This file is about the CLI's handling.
+  (driver as any).logger = { debug() {}, info() {}, warn() {}, error() {} };
+  await driver.initObjects([OBJECT]);
+  return driver;
+}
+
+describe('the unbuildable_index drift op through the CLI (#20432)', () => {
+  let driver: SqlDriver | undefined;
+  afterEach(async () => {
+    vi.restoreAllMocks();
+    await driver?.disconnect().catch(() => {});
+    driver = undefined;
+  });
+
+  it('the fixture is real: the driver reports exactly one unbuildable_index entry, needs_confirm', async () => {
+    driver = await syncedDriver();
+    const drift = await driver.detectManagedDrift();
+    expect(drift.map((d) => d.op.type)).toEqual(['unbuildable_index']);
+    expect(drift[0]).toMatchObject({ category: 'needs_confirm', op: { indexName: INDEX, unique: true } });
+  });
+
+  it('the artifact boot gate warns about it and does NOT refuse the boot', async () => {
+    driver = await syncedDriver();
+    const info: string[] = [];
+    const warn: string[] = [];
+
+    // The gate's two members, delegated to the REAL driver. `bootSchemaStack`
+    // reaches the driver by duck type, and `SqlDriver` keeps `config`
+    // protected, so the class itself is not assignable to `SqlDriverLike`.
+    const real = driver;
+    const gateDriver: SqlDriverLike = {
+      detectManagedDrift: () => real.detectManagedDrift(),
+      applyMigrationEntries: (entries, opts) => real.applyMigrationEntries(entries, opts),
+    };
+    const verdict = await runArtifactBootMigrationGate({
+      driver: gateDriver,
+      artifactDisplay: 'https://artifacts.example.com/app.json',
+      info: (m) => info.push(m),
+      warn: (m) => warn.push(m),
+    });
+
+    expect(verdict.ok).toBe(true);
+    expect(verdict.refusal).toBeUndefined();
+    expect(verdict.destructive).toEqual([]);
+    // Handed to the driver, which declined it: skipped, never "migrated".
+    expect(verdict.applied).toEqual([]);
+    expect(verdict.skipped.map((d) => d.op.type)).toEqual(['unbuildable_index']);
+    expect(info).toEqual([]);
+    // …and the skip is not silent: one warn, carrying the driver's message.
+    expect(warn).toHaveLength(1);
+    expect(warn[0]).toContain(T);
+    expect(warn[0]).toContain(INDEX);
+  });
+
+  it('os migrate plan renders it with no CLI change: grouped needs_confirm, targeted by index name, tagged by op', async () => {
+    driver = await syncedDriver();
+    const drift = await driver.detectManagedDrift();
+
+    expect(groupByCategory(drift).needs_confirm).toEqual(drift);
+    expect(driftTarget(drift[0]!)).toBe(`${T} [${INDEX}]`);
+
+    const lines: string[] = [];
+    vi.spyOn(console, 'log').mockImplementation((...args: unknown[]) => {
+      lines.push(args.map(String).join(' '));
+    });
+    renderPlan(drift);
+    const out = lines.join('\n');
+    expect(out).toContain(`${T} [${INDEX}]`);
+    expect(out).toContain('[unbuildable_index]');
+    expect(out).toContain(drift[0]!.message);
+  });
+});