objectstack-ai
diff --git a/‎.changeset/artifact-forward-conversion-door.md‎
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diff --git a/‎packages/metadata-core/src/artifact-forward-conversion.test.ts‎
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+---
+'@objectstack/metadata-core': patch
+'@objectstack/metadata': patch
+---
+
+Artifacts built by released 17.x tooling boot again on ≥17.2 runtimes: the artifact-ingestion door now runs a versioned ADR-0087 forward conversion before the strict parse (#12772).
+
+A compiled artifact whose declared `engines.protocol` floor predates the running `@objectstack/spec` version replays the full conversion chain — retired entries included — before validation, exactly the policy the stored-row read path already applies to `sys_metadata` rows. Measured incident: `dist/objectstack.json` built by `@objectstack/cli` 17.1.0 carries the then-legal `allowRestore`/`allowPurge` permission bits (75 of each, injected by the released builder), and spec 17.2.0's `retiredKey` tombstone refused the boot with no operator remedy (`os migrate meta` targets sources, not built artifacts).
+
+The conversion is versioned, not a blanket amnesty: an artifact authored at the current (or a newer) spec version converts nothing and still refuses at the tombstone — the retired keys return with the M2 lifecycle initiative (#1883), and artifacts authored against that surface are never stripped by history. Conversion notices surface operator-visibly and deduped, one summary line per conversion per artifact. New exports from `@objectstack/metadata-core`: `applyArtifactForwardConversions`, `resolveInstalledSpecVersion`, `parseRangeFloor`, `resolveDeclaredRange`.
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+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * Versioned artifact forward conversion (#12772) — the policy, both directions.
+ *
+ * The measured incident: an artifact built by released 17.1.0 tooling carries
+ * `allowRestore`/`allowPurge` permission bits (legal when it was built, retired
+ * in spec 17.2.0), and the 17.2 runtime's strict parse refuses the boot. The
+ * ADR-0087 registry already declares the strip conversion
+ * (`permission-allow-restore-purge-removed`, `retiredFromLoadPath: true`);
+ * what was missing is a door that opens the retired window for artifacts whose
+ * declared `engines.protocol` floor predates the running spec — and ONLY for
+ * those. Both directions are pinned here: the amnesty (older floor converts
+ * forward) and its boundary (current-or-newer floor does not — the tombstone
+ * stays the authority), because an unconditional strip becomes wrong the day
+ * the keys return to the spec (roadmap M2, #1883).
+ */
+
+import { describe, it, expect } from 'vitest';
+import type { ConversionNotice } from '@objectstack/spec';
+import {
+  applyArtifactForwardConversions,
+  parseRangeFloor,
+  resolveInstalledSpecVersion,
+  type ArtifactConversionNotice,
+} from './artifact-forward-conversion.js';
+
+// ── Mirror pin ───────────────────────────────────────────────────────────────
+// `ArtifactConversionNotice` is a structural mirror of the spec root's
+// `ConversionNotice`, kept so the module's PUBLIC declarations never import
+// the ~2MB spec root (the import made every downstream type program load the
+// root twice — d.ts and d.mts flavors — and pushed the http-conformance
+// TEST_DEBT re-measure over CI's ~4GB tsc heap ceiling; #12772 patch round).
+// The TEST may reference the root freely — tests never ship declarations.
+// Both assignability directions, so EITHER side drifting reds this suite:
+type _SpecToMirror = ConversionNotice extends ArtifactConversionNotice ? true : never;
+type _MirrorToSpec = ArtifactConversionNotice extends ConversionNotice ? true : never;
+const _mirrorPin: [_SpecToMirror, _MirrorToSpec] = [true, true];
+void _mirrorPin;
+
+/** The measured 17.1-built shape: full CRUD plus the two retired lifecycle bits. */
+function legacyPermissionDefinition(protocolRange: string | undefined) {
+  return {
+    manifest: {
+      id: 'app.example.crm',
+      name: 'crm',
+      version: '3.0.0',
+      type: 'app',
+      ...(protocolRange ? { engines: { protocol: protocolRange } } : {}),
+    },
+    permissions: [
+      {
+        name: 'support_agent',
+        label: 'Support Agent',
+        objects: {
+          crm_ticket: {
+            allowRead: true,
+            allowCreate: true,
+            allowEdit: true,
+            allowDelete: true,
+            allowRestore: true,
+            allowPurge: false,
+          },
+          crm_note: { allowRead: true },
+        },
+      },
+    ],
+  };
+}
+
+describe('applyArtifactForwardConversions — the versioned window (#12772)', () => {
+  it('converts a 17.1-authored artifact forward on a 17.2 runtime: retired keys stripped, everything else byte-preserved', () => {
+    const def = legacyPermissionDefinition('^17.1.0');
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+
+    expect(result.verdict).toBe('converted-forward');
+    expect(result.authoredFloor).toBe('17.1.0');
+
+    const converted = result.definition as typeof def;
+    const grant = converted.permissions[0]!.objects.crm_ticket as Record<string, unknown>;
+    expect(grant).not.toHaveProperty('allowRestore');
+    expect(grant).not.toHaveProperty('allowPurge');
+    // Everything else byte-preserved: same keys, same values, and the
+    // untouched sibling object rides through by reference (copy-on-write).
+    expect(grant).toEqual({ allowRead: true, allowCreate: true, allowEdit: true, allowDelete: true });
+    expect(converted.permissions[0]!.objects.crm_note).toBe(def.permissions[0]!.objects.crm_note);
+    expect(converted.manifest).toBe(def.manifest);
+
+    // Loud, not silent: one notice per stripped key.
+    const stripNotices = result.notices.filter(
+      (n) => n.conversionId === 'permission-allow-restore-purge-removed',
+    );
+    expect(stripNotices).toHaveLength(2);
+    expect(stripNotices.map((n) => n.path)).toEqual([
+      'permissions[0].objects.crm_ticket.allowRestore',
+      'permissions[0].objects.crm_ticket.allowPurge',
+    ]);
+  });
+
+  it('REFUSES the amnesty for an artifact authored at the current spec version — no blanket strip', () => {
+    const def = legacyPermissionDefinition('^17.2.0');
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+
+    expect(result.verdict).toBe('authored-current');
+    expect(result.notices).toEqual([]);
+    // The definition comes back by reference, retired keys still present —
+    // the strict parse downstream is what answers, with the tombstone.
+    expect(result.definition).toBe(def);
+    expect(def.permissions[0]!.objects.crm_ticket).toHaveProperty('allowPurge');
+  });
+
+  it('REFUSES the amnesty for an artifact authored at a NEWER spec than the runtime', () => {
+    const def = legacyPermissionDefinition('^18.0.0');
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+    expect(result.verdict).toBe('authored-current');
+    expect(result.definition).toBe(def);
+  });
+
+  it('treats a bare-major range (`^17`, the init scaffold default) as floor 17.0.0 — older than 17.2, so it converts', () => {
+    const def = legacyPermissionDefinition('^17');
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+    expect(result.verdict).toBe('converted-forward');
+    expect(result.authoredFloor).toBe('17.0.0');
+    const grant = (result.definition as typeof def).permissions[0]!.objects.crm_ticket;
+    expect(grant).not.toHaveProperty('allowPurge');
+  });
+
+  it('replays the full chain for an artifact with NO declared range — the stored-row posture for data of unknown age', () => {
+    const def = legacyPermissionDefinition(undefined);
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+    expect(result.verdict).toBe('converted-undeclared');
+    expect(result.authoredFloor).toBeNull();
+    const grant = (result.definition as typeof def).permissions[0]!.objects.crm_ticket;
+    expect(grant).not.toHaveProperty('allowRestore');
+  });
+
+  it('closes the window when the runtime spec version cannot be resolved — amnesty needs positive version evidence', () => {
+    const def = legacyPermissionDefinition('^17.1.0');
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: null });
+    expect(result.verdict).toBe('runtime-version-unknown');
+    expect(result.definition).toBe(def);
+    expect(def.permissions[0]!.objects.crm_ticket).toHaveProperty('allowPurge');
+  });
+
+  it('is idempotent: a definition already canonical for its floor comes back by reference', () => {
+    const def = {
+      manifest: { id: 'app.example.clean', name: 'clean', version: '1.0.0', type: 'app', engines: { protocol: '^17.1.0' } },
+      permissions: [
+        { name: 'reader', label: 'Reader', objects: { crm_note: { allowRead: true } } },
+      ],
+    };
+    const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: '17.2.0' });
+    expect(result.verdict).toBe('converted-forward');
+    expect(result.notices).toEqual([]);
+    // applyConversions is copy-on-write, so "nothing recognized" is provable
+    // by identity, not just equality.
+    expect(result.definition).toBe(def);
+  });
+
+  it('passes non-object input through untouched', () => {
+    expect(applyArtifactForwardConversions(null, { runtimeSpecVersion: '17.2.0' }).verdict).toBe('not-an-object');
+    expect(applyArtifactForwardConversions([1], { runtimeSpecVersion: '17.2.0' }).verdict).toBe('not-an-object');
+  });
+
+  it('defaults the runtime version to the installed @objectstack/spec version', () => {
+    const installed = resolveInstalledSpecVersion();
+    // In this workspace spec is always resolvable; the default path must find
+    // the same answer an explicit resolution finds.
+    expect(installed).toMatch(/^\d+\.\d+\.\d+/);
+    const def = legacyPermissionDefinition('^0.0.1');
+    const result = applyArtifactForwardConversions(def);
+    expect(result.runtimeSpecVersion).toBe(installed);
+    expect(result.verdict).toBe('converted-forward');
+  });
+});
+
+describe('parseRangeFloor — the range spellings artifacts actually carry', () => {
+  it.each([
+    ['^17.1.0', [17, 1, 0]],
+    ['^17', [17, 0, 0]],
+    ['~17.2.1', [17, 2, 1]],
+    ['>=17.1 <18', [17, 1, 0]],
+    ['17.1.0', [17, 1, 0]],
+    ['v17.1.0', [17, 1, 0]],
+  ] as const)('%s → %j', (range, expected) => {
+    expect(parseRangeFloor(range)).toEqual(expected);
+  });
+
+  it('answers null for unreadable ranges (treated like undeclared by the policy)', () => {
+    expect(parseRangeFloor('')).toBeNull();
+    expect(parseRangeFloor('latest')).toBeNull();
+    expect(parseRangeFloor('x'.repeat(200))).toBeNull();
+  });
+});