README.md

@@ -49,7 +49,9 @@ as one **Ekklesia Module Package v1**
 ([ADR 0049](docs/architecture/decisions/0049-module-package-v1.md)): a deterministic `.tar.gz` and
 its SHA-256, produced by the canonical packager (`@ekklesia/module-pack`) with the module's backend
 bundled, and checked by Core's verifier before it is installed. Only the portable `any` target exists
-so far. Purge, native-target packages, signing, and any installer or marketplace do not exist yet.
+so far. ABI-v1 packages may bundle a module-owned Drizzle version without coupling it to Core;
+legacy-v8 packages retain their transitional exact-version check. Purge, native-target packages,
+signing, and any installer or marketplace do not exist yet.
 
 Phase 4A added Core-owned identity foundations: a Core-owned Better Auth database schema
 (`ekklesia_core_user`, `ekklesia_core_session`, `ekklesia_core_account`,

core/src/modules/module-package-probe.ts

@@ -12,9 +12,14 @@
 // Written as erasable TypeScript with no relative imports, so Node can run the source file directly
 // in tests as well as the compiled file in the image.
 import { pathToFileURL } from "node:url";
-import { parseModuleRuntimeDefinition, parseModuleSchemaDefinition } from "@ekklesia/contracts";
+import {
+  parseModuleRuntimeDefinition,
+  parseModuleSchemaDefinition,
+  parseModuleSchemaMetadataDefinition,
+} from "@ekklesia/contracts";
 
 interface ProbeRequest {
+  readonly databaseAbi?: 1;
   readonly moduleId: string;
   readonly version: string;
   readonly entrypoints: Readonly<Record<string, string>>;
@@ -22,7 +27,7 @@ interface ProbeRequest {
 
 interface ProbeFailure {
   readonly role: string;
-  readonly reason: "export" | "identity" | "load";
+  readonly reason: "contract" | "export" | "identity" | "load";
 }
 
 function defaultExport(namespace: unknown): unknown {
@@ -51,8 +56,14 @@ async function probe(request: ProbeRequest): Promise<readonly ProbeFailure[]> {
         if (definition.id !== request.moduleId || definition.version !== request.version) {
           failures.push({ reason: "identity", role });
         }
+        if ((definition.database?.abi === 1) !== (request.databaseAbi === 1)) {
+          failures.push({ reason: "contract", role });
+        }
       } else if (role === "schema") {
-        const definition = parseModuleSchemaDefinition(defaultExport(namespace));
+        const definition =
+          request.databaseAbi === 1
+            ? parseModuleSchemaMetadataDefinition(defaultExport(namespace))
+            : parseModuleSchemaDefinition(defaultExport(namespace));
         if (definition.moduleId !== request.moduleId) {
           failures.push({ reason: "identity", role });
         }

core/src/modules/module-package-verification.ts

@@ -45,6 +45,7 @@ import { discoverModuleSchemas, ModuleSchemaDiscoveryError } from "./schema-disc
 export type ModulePackageVerificationErrorCode =
   | ModulePackageArchiveErrorCode
   | "MODULE_PACKAGE_DATABASE_RUNTIME_INCOMPATIBLE"
+  | "MODULE_PACKAGE_DATABASE_RUNTIME_UNEXPECTED"
   | "MODULE_PACKAGE_DIGEST_MISMATCH"
   | "MODULE_PACKAGE_ENTRYPOINT_LOAD_FAILED"
   | "MODULE_PACKAGE_EXTRACTION_FAILED"
@@ -67,6 +68,8 @@ export type ModulePackageVerificationErrorCode =
 const messages: Readonly<Record<ModulePackageVerificationErrorCode, string>> = Object.freeze({
   MODULE_PACKAGE_DATABASE_RUNTIME_INCOMPATIBLE:
     "The package's bundled database runtime does not match this platform's (a transitional constraint).",
+  MODULE_PACKAGE_DATABASE_RUNTIME_UNEXPECTED:
+    "A Module Database ABI package must not carry a transitional database runtime.",
   MODULE_PACKAGE_DIGEST_MISMATCH: "The archive does not match the SHA-256 it was given.",
   MODULE_PACKAGE_ENTRYPOINT_LOAD_FAILED:
     "A backend entrypoint could not be loaded from the package alone.",
@@ -275,9 +278,15 @@ function checkCompatibility(
   if (sdk !== undefined && !isVersionCompatible(sdk, manifest.compatibility.moduleSdk)) {
     fail("MODULE_PACKAGE_SDK_INCOMPATIBLE");
   }
-  // Transitional (ADR 0049): today a module's Drizzle copy must be interchangeable with the
-  // platform's, because Core queries the module's tables with its own Drizzle instance. This is an
-  // implementation constraint pending a Module Database ABI, not that ABI.
+  if (manifest.database?.abi === 1) {
+    if (metadata.transitional?.databaseRuntime !== undefined) {
+      fail("MODULE_PACKAGE_DATABASE_RUNTIME_UNEXPECTED");
+    }
+    return;
+  }
+  // Transitional legacy-v8 path (ADR 0049): Core queries the module's Drizzle tables with its own
+  // Drizzle instance, so a recorded module runtime must match. ABI-v1 packages return above: their
+  // bundled ORM is a private implementation detail and is never compared with Core's.
   for (const [runtime, version] of Object.entries(metadata.transitional?.databaseRuntime ?? {})) {
     if (platform.databaseRuntime[runtime] !== version) {
       fail("MODULE_PACKAGE_DATABASE_RUNTIME_INCOMPATIBLE");
@@ -314,8 +323,7 @@ function probeEntrypointPath(): string {
 /** Loads every backend entrypoint in a short-lived child with an empty environment, and reports
  * only whether each loaded and exported a definition naming this module. */
 async function loadEntrypoints(
-  moduleId: string,
-  version: string,
+  manifest: Pick<ModuleManifest, "database" | "id" | "version">,
   entrypoints: Readonly<Record<string, string>>,
   timeoutMs: number,
 ): Promise<void> {
@@ -332,13 +340,24 @@ async function loadEntrypoints(
       }
     };
     try {
-      child = fork(probeEntrypointPath(), [JSON.stringify({ entrypoints, moduleId, version })], {
-        cwd: tmpdir(),
-        env: {},
-        execArgv: [],
-        serialization: "json",
-        stdio: ["ignore", "ignore", "ignore", "ipc"],
-      });
+      child = fork(
+        probeEntrypointPath(),
+        [
+          JSON.stringify({
+            ...(manifest.database?.abi === 1 ? { databaseAbi: 1 } : {}),
+            entrypoints,
+            moduleId: manifest.id,
+            version: manifest.version,
+          }),
+        ],
+        {
+          cwd: tmpdir(),
+          env: {},
+          execArgv: [],
+          serialization: "json",
+          stdio: ["ignore", "ignore", "ignore", "ipc"],
+        },
+      );
     } catch {
       finish("failed");
       return;
@@ -437,12 +456,7 @@ export async function verifyModulePackage(
 
     // Executed only now, and first in isolation: a schema is imported in this process below only
     // after the probe proved it loads on its own.
-    await loadEntrypoints(
-      metadata.module.id,
-      metadata.module.version,
-      entrypoints,
-      options.loadTimeoutMs ?? 30_000,
-    );
+    await loadEntrypoints(manifest, entrypoints, options.loadTimeoutMs ?? 30_000);
     try {
       await discoverModuleSchemas(discoveryOptions);
     } catch (error) {

core/tests/module-package-verification.test.ts

@@ -3,8 +3,8 @@ import { tmpdir } from "node:os";
 import path from "node:path";
 import { afterEach, describe, expect, it } from "vitest";
 import {
-  type ModulePackageVerificationErrorCode,
   ModulePackageVerificationError,
+  type ModulePackageVerificationErrorCode,
   verifyModulePackage,
 } from "../src/modules/index.js";
 import {
@@ -72,6 +72,19 @@ function withEntry(entry: FixtureEntry): PackageFixtureOptions {
   return { extraEntries: [entry] };
 }
 
+function abiPackage(overrides: PackageFixtureOptions = {}): PackageFixtureOptions {
+  return {
+    manifest: (manifest) => ({ ...manifest, database: { abi: 1 } }),
+    schemaSource: `export default {
+      moduleId: "example",
+      tables: [{ name: "example_records", foreignKeys: [] }]
+    };\n`,
+    serverSource:
+      'export default { database: { abi: 1 }, id: "example", version: "0.1.0", register() {} };\n',
+    ...overrides,
+  };
+}
+
 describe("Module Package v1 verification (ADR 0049)", () => {
   it("verifies a valid any-target package, its digest, and its module", async () => {
     const { archivePath, sha256: digest } = await archiveFile();
@@ -214,6 +227,44 @@ describe("Module Package v1 verification (ADR 0049)", () => {
     });
   });
 
+  it("verifies ABI-v1 plain schema metadata without comparing Drizzle with Core", async () => {
+    const { archivePath } = await archiveFile(abiPackage());
+
+    await expect(
+      verifyModulePackage({
+        archivePath,
+        platform: { ...platform, databaseRuntime: { "drizzle-orm": "99.0.0" } },
+      }),
+    ).resolves.toMatchObject({ moduleId: "example" });
+  });
+
+  it("rejects transitional database runtime metadata from an ABI-v1 package", async () => {
+    await rejection(
+      abiPackage({
+        metadata: (metadata) => ({
+          ...metadata,
+          transitional: { databaseRuntime: { "drizzle-orm": "0.45.2" } },
+        }),
+      }),
+      "MODULE_PACKAGE_DATABASE_RUNTIME_UNEXPECTED",
+    );
+  });
+
+  it("rejects an unsupported database ABI and malformed ABI-v1 schema metadata", async () => {
+    await rejection(
+      abiPackage({ manifest: (manifest) => ({ ...manifest, database: { abi: 2 } }) }),
+      "MODULE_PACKAGE_MANIFEST_INVALID",
+    );
+    const schemaError = await rejection(
+      abiPackage({
+        schemaSource:
+          'export default { moduleId: "example", tables: { records: "attacker-chosen" } };\n',
+      }),
+      "MODULE_PACKAGE_ENTRYPOINT_LOAD_FAILED",
+    );
+    expect(schemaError.message).not.toContain("attacker-chosen");
+  });
+
   it("fails a target this platform cannot run", async () => {
     await rejection(
       {

core/tests/support/module-package-fixture.ts

@@ -86,6 +86,7 @@ export interface PackageFixtureOptions {
   readonly id?: string;
   readonly version?: string;
   readonly serverSource?: string;
+  readonly schemaSource?: string;
   readonly manifest?: (manifest: Record<string, unknown>) => Record<string, unknown>;
   readonly runtimePackage?: Record<string, unknown>;
   readonly metadata?: (metadata: Record<string, unknown>) => Record<string, unknown>;
@@ -125,6 +126,7 @@ export async function modulePackageFixture(
   let files: Map<string, Buffer>;
   try {
     const created = await createMigrationModule(scratch, id, {
+      ...(options.schemaSource === undefined ? {} : { schemaSource: options.schemaSource }),
       serverSource:
         options.serverSource ??
         `export default { id: ${JSON.stringify(id)}, version: ${JSON.stringify(version)}, register() {} };\n`,

docs/architecture/platform-architecture.md

@@ -682,13 +682,11 @@ Module Package v1, a deterministic `.tar.gz` with its SHA-256.
   and `THIRD_PARTY_NOTICES`, and writes the archive.
 - **The verifier.** Core's `verifyModulePackage` reads the archive in memory and refuses links,
   special files, and escaping paths. It checks every digest and identity, the target and runtime,
-  and the transitional Drizzle agreement, runs the platform's own module and migration validation,
-  and loads the backend once in a short-lived process with an empty environment. Only then does it
-  extract anything.
-- **What exists today.** Only the `any` target. Drizzle agreement is recorded as transitional, not a
-  database ABI. [ADR 0050](decisions/0050-module-database-abi-v1.md) defines the Module Database ABI
-  that removes it for modules that declare that ABI. Manifest version 8 now lets a module declare
-  `database: { abi: 1 }`; Core gives each such module its own attributed ABI executor and validates
-  its plain schema metadata. A version 8 module that omits `database` remains on the temporary
-  legacy facade. Packaging still uses ADR 0049's transitional Drizzle agreement in this slice; the
-  packager transition and template ABI migration are deliberately next.
+  runs the platform's own module, schema, and migration validation, and loads the backend once in a
+  short-lived process with an empty environment. Only then does it extract anything.
+- **What exists today.** Only the `any` target. A manifest-v8 ABI module carries no
+  `transitional.databaseRuntime`; Drizzle may be bundled as its private implementation detail, and
+  Core validates plain schema metadata without comparing ORM versions. A version 8 module that
+  omits `database` remains on the temporary legacy facade and keeps ADR 0049's exact transitional
+  Drizzle agreement. The canonical template now demonstrates ABI v1. The legacy facade still
+  exists.

docs/development/testing.md

@@ -603,19 +603,21 @@ Ekklesia Module Package v1 (ADR 0049) is proven at three levels, all in `pnpm ve
 - `core/tests/module-package-verification.test.ts`: the verifier against hand-built archives,
   including what the packager never produces. A valid package verifies and extracts with normalized
   modes. A wrong digest, a corrupted or missing or unlisted file, disagreeing identities, an unknown
-  format, unknown transitional metadata, an incompatible target, Node.js range, SDK, or database
-  runtime, a missing entrypoint, a backend that imports something the package lacks, absolute and
+  format, unknown transitional metadata, an incompatible target, Node.js range, SDK, or legacy
+  database runtime, ABI metadata carrying a forbidden transitional runtime, malformed ABI schema
+  metadata, a missing entrypoint, a backend that imports something the package lacks, absolute and
   `..` paths, symbolic and hard links, device nodes and FIFOs, setuid and setgid entries, a second
   top-level directory, and a duplicate entry each fail with their own sanitized code. The backend
-  load check runs in a real child process.
+  load check runs in a real child process and selects the schema contract from the manifest.
 - `packages/module-pack/tests/`: the packager against generated fixture modules (payload contents,
   generated `package.json`, metadata, bundled backend with only built-in imports, refusal of native
   and platform-specific dependencies and of unknown or textless licences, notices, byte-identical
   archives, normalized tar and gzip headers), and end to end against the built module template:
   packed twice to identical bytes without changing the workspace's install state, verified by Core's
-  verifier, extracted elsewhere, and loaded with Node's own resolution hooks proving nothing outside
-  the package is resolved. Turbo builds the template and Core first, and runs the template's own
-  tests (which rebuild its UI in place) before these.
+  verifier with a deliberately different Core Drizzle version, extracted elsewhere, and loaded with
+  Node's own resolution hooks proving nothing outside the package is resolved. The package contains
+  module-side Drizzle but no `transitional.databaseRuntime`. Turbo builds the template and Core
+  first, and runs the template's own tests (which rebuild its UI in place) before these.
 
 ## The generic platform image and the reference deployment
 
@@ -635,7 +637,7 @@ These need Docker and build images locally; nothing is pushed or published.
   generic image with empty module storage. With `EKKLESIA_SMOKE_TOPOLOGY=split`, the same image also
   runs the installed-module lifecycle:
   - the module template is packaged by the canonical packager (Module Package v1, ADR 0049),
-    verified by the image's own verifier, and installed into module storage;
+    as ABI v1, verified by the image's own verifier, and installed into module storage;
   - its migration is planned and explicitly applied, and the API restarted;
   - a real browser mounts it;
   - it is removed and the API restarted, and Core still runs, migrations still plan and apply, and

docs/module-development/README.md

@@ -138,18 +138,15 @@ The archive holds one directory named with your module id:
 - **Deterministic.** The same packager version and the same built inputs produce the same archive,
   byte for byte, wherever the checkout is.
 
-**Drizzle, for now.** You define tables with your own copy of Drizzle, and Core runs your queries
-through the platform's Drizzle instance (see [Database access](#database-access)). Objects from two
-copies interoperate only when the copies are interchangeable, so the current implementation requires
-**exactly the Drizzle version the platform uses**: the one `@ekklesia/module-sdk` depends on. The
-package records it under `transitional`, and an installation refuses a package whose Drizzle differs.
-This is a constraint of today's implementation, not a permanent contract.
+**Database ABI v1 is the current path.** A module that declares `"database": { "abi": 1 }` keeps
+Drizzle and its exact version inside its own bundle as an implementation detail. Its package omits
+`transitional.databaseRuntime`; Core validates the module's plain schema metadata and never compares
+the bundled Drizzle version with its own. The canonical template demonstrates this path with
+`@ekklesia/module-database/drizzle`.
 
-`@ekklesia/module-database` now contains the module-side ABI v1 adapters that remove that coupling,
-but deployed modules cannot receive an ABI v1 executor yet. Manifest v8 and per-module runtime
-service delivery are separate later work. Until those land, the current transitional package rule
-and database service above remain authoritative; neither Module Package v1 nor the template changed
-with the adapter package.
+A manifest-v8 module that omits `database` remains on the temporary legacy facade. Only that legacy
+package records bundled Drizzle under `transitional.databaseRuntime`, and the verifier continues to
+require exact agreement with Core. The legacy facade has not been removed.
 
 #### Verifying a package
 
@@ -1468,9 +1465,10 @@ export default defineConfig({
 ```
 
 Keep `tables.ts` limited to Drizzle declarations so the stable generator can load it without
-executing the ESM Module SDK wrapper. `src/schema/index.ts` remains the production compiled schema
-entrypoint and wraps those same exported table objects with `defineModuleSchema`; tables are not
-declared twice.
+executing the ESM module wrapper. For an ABI-v1 module, `src/schema/index.ts` remains the production
+compiled schema entrypoint and converts those same table objects to plain metadata with
+`moduleDrizzleSchemaMetadata`; tables are not declared twice. A legacy-v8 module continues to wrap
+them with `defineModuleSchema` while that facade exists.
 
 Run the module's `migration:generate` script with a lowercase snake-case name, review the generated
 SQL and snapshot, and add the matching entry to `drizzle/meta/_ekklesia.json`. Every entry must
@@ -1587,10 +1585,10 @@ The result is `{ moduleId, tables: [{ name, foreignKeys: [{ table }] }] }`. Core
 prefixes, duplicates, and same-module foreign-key targets from those strings and never inspects an
 ABI module's ORM objects.
 
-The canonical module template has moved to manifest version 8 but intentionally omits `database`,
-so it remains on the legacy facade for one more slice. The packager still emits ADR 0049's
-`transitional.databaseRuntime`; the next package-transition change will remove that fact for ABI
-packages and migrate the template at the same time.
+The canonical module template declares ABI v1, uses the module-side Drizzle adapter, and exports
+plain schema metadata derived with `moduleDrizzleSchemaMetadata`. Its Module Package v1 still
+bundles Drizzle, but carries no `transitional.databaseRuntime`: that version belongs to the module,
+not Core.
 
 ## Legacy database access
 

packages/contracts/src/module-package.ts

@@ -87,10 +87,10 @@ const ekklesiaPackageNameSchema = z
  * (ADR 0049). Strict at every level: a reader that finds a fact it does not understand must refuse
  * the package rather than ignore it.
  *
- * `databaseRuntime` records the Drizzle version bundled with the module's backend, because Core runs
- * a module's queries through its own Drizzle instance over tables the module defined with its own
- * copy. That is an implementation constraint pending a Module Database ABI decision, **not** a
- * database contract a module may rely on.
+ * For a manifest-v8 module that omits `database`, `databaseRuntime` records the Drizzle version
+ * bundled with the module's backend because Core runs that legacy module's queries through its own
+ * Drizzle instance over the module's table objects. ABI-v1 packages must omit this fact: their ORM
+ * stays module-side and Core receives only the stable SQL ABI.
  */
 const modulePackageTransitionalSchema = z.strictObject({
   databaseRuntime: z

packages/module-pack/src/pack-module.ts

@@ -17,7 +17,7 @@ import {
 import { analyzeModuleUi, ModuleUiBuildError } from "@ekklesia/module-ui-build";
 import { build, type Message, type Plugin } from "esbuild";
 import { minVersion, satisfies, validRange } from "semver";
-import { NoticeError, type NoticeComponent, type NoticeUse, thirdPartyNotices } from "./notices.js";
+import { type NoticeComponent, NoticeError, type NoticeUse, thirdPartyNotices } from "./notices.js";
 import { BundledPackageIndex, isNativeOrPlatformSpecific } from "./packages.js";
 import { deterministicTarGz, TarPathError } from "./tar.js";
 
@@ -440,7 +440,8 @@ export async function packModule(options: PackModuleOptions): Promise<ModulePack
       components.set(key, { bundled, uses: new Set([use]) });
     }
   }
-  if (drizzleVersions.size > 1) {
+  const usesDatabaseAbi = manifest.database?.abi === 1;
+  if (!usesDatabaseAbi && drizzleVersions.size > 1) {
     throw new ModulePackError("MODULE_PACK_DATABASE_RUNTIME_CONFLICT");
   }
   const sdk = incorporates.get("@ekklesia/module-sdk");
@@ -531,7 +532,7 @@ export async function packModule(options: PackModuleOptions): Promise<ModulePack
     incorporates: Object.fromEntries(
       [...incorporates].sort(([left], [right]) => compare(left, right)),
     ),
-    ...(drizzleVersions.size === 1
+    ...(!usesDatabaseAbi && drizzleVersions.size === 1
       ? { transitional: { databaseRuntime: { "drizzle-orm": [...drizzleVersions][0] } } }
       : {}),
     files: listed.map((file) => ({ path: file.path, size: file.size, sha256: file.sha256 })),

packages/module-pack/tests/pack-module.test.ts

@@ -3,7 +3,7 @@ import { readFile } from "node:fs/promises";
 import { isBuiltin } from "node:module";
 import path from "node:path";
 import { afterEach, describe, expect, it } from "vitest";
-import { type ModulePackErrorCode, ModulePackError, packModule } from "../src/index.js";
+import { ModulePackError, type ModulePackErrorCode, packModule } from "../src/index.js";
 import {
   cleanupFixtures,
   type FixtureModuleOptions,
@@ -181,11 +181,12 @@ describe("packModule: a self-contained backend", () => {
     }
   });
 
-  it("bundles the module-side Drizzle adapter with the module's ORM runtime", async () => {
+  it("bundles ABI-v1 Drizzle as a module detail without transitional runtime metadata", async () => {
     const { archive } = await pack({
+      databaseAbi: 1,
       serverSource: `import { moduleDrizzle } from "@ekklesia/module-database/drizzle";
 export const database = (executor) => moduleDrizzle(executor);
-export default { id: "example", version: "0.1.0", register() {} };
+export default { database: { abi: 1 }, id: "example", version: "0.1.0", register() {} };
 `,
       withModuleDatabase: true,
     });
@@ -194,7 +195,7 @@ export default { id: "example", version: "0.1.0", register() {} };
     expect(metadata.incorporates).toMatchObject({
       "@ekklesia/module-database": expect.any(String),
     });
-    expect(metadata.transitional).toEqual({ databaseRuntime: { "drizzle-orm": "0.45.2" } });
+    expect(metadata.transitional).toBeUndefined();
     for (const [file, data] of files) {
       if (!file.endsWith(".js")) {
         continue;
@@ -213,6 +214,14 @@ export default { id: "example", version: "0.1.0", register() {} };
     }
   });
 
+  it("keeps legacy-v8 Drizzle runtime metadata unchanged", async () => {
+    const { archive } = await pack({ withSchema: true });
+    const metadata = JSON.parse(
+      fileEntries(archive).get("example/ekklesia.package.json")?.toString("utf8") ?? "",
+    );
+    expect(metadata.transitional).toEqual({ databaseRuntime: { "drizzle-orm": "0.45.2" } });
+  });
+
   it("refuses a dependency the bundle cannot resolve rather than leaving it external", async () => {
     await packRejection(
       {

packages/module-pack/tests/support/fixture-module.ts

@@ -22,6 +22,7 @@ export interface FakePackage {
 }
 
 export interface FixtureModuleOptions {
+  readonly databaseAbi?: 1;
   readonly id?: string;
   readonly version?: string;
   readonly serverSource?: string;
@@ -55,19 +56,27 @@ async function write(file: string, contents: string | Uint8Array): Promise<void>
 const defaultServer = (
   id: string,
   version: string,
+  databaseAbi?: 1,
 ) => `import { defineModuleRuntime } from "@ekklesia/module-sdk";
-export default defineModuleRuntime({ id: ${JSON.stringify(id)}, version: ${JSON.stringify(version)}, register() {} });
+export default defineModuleRuntime({ ${databaseAbi === 1 ? "database: { abi: 1 }, " : ""}id: ${JSON.stringify(id)}, version: ${JSON.stringify(version)}, register() {} });
 `;
 
-const schemaSource = (
-  id: string,
-) => `import { createModuleTable, defineModuleSchema } from "@ekklesia/module-sdk";
+const schemaSource = (id: string, databaseAbi?: 1) => `${
+  databaseAbi === 1
+    ? 'import { moduleDrizzleSchemaMetadata } from "@ekklesia/module-database/drizzle";'
+    : 'import { defineModuleSchema } from "@ekklesia/module-sdk";'
+}
+import { createModuleTable } from "@ekklesia/module-sdk";
 import { text, uuid } from "drizzle-orm/pg-core";
 export const records = createModuleTable(${JSON.stringify(id)})("records", {
   id: uuid("id").primaryKey(),
   value: text("value").notNull(),
 });
-export default defineModuleSchema({ moduleId: ${JSON.stringify(id)}, tables: { records } });
+export default ${
+  databaseAbi === 1
+    ? `moduleDrizzleSchemaMetadata(${JSON.stringify(id)}, { records })`
+    : `defineModuleSchema({ moduleId: ${JSON.stringify(id)}, tables: { records } })`
+};
 `;
 
 export async function fixtureModule(options: FixtureModuleOptions = {}): Promise<string> {
@@ -76,6 +85,7 @@ export async function fixtureModule(options: FixtureModuleOptions = {}): Promise
   const root = await scratchDirectory("ekklesia-pack-fixture-");
   const moduleDirectory = path.join(root, id);
   const tableName = `${id.replaceAll("-", "_")}_records`;
+  const usesModuleDatabase = options.withModuleDatabase || options.databaseAbi === 1;
 
   const baseManifest: Record<string, unknown> = {
     manifestVersion: 8,
@@ -83,6 +93,7 @@ export async function fixtureModule(options: FixtureModuleOptions = {}): Promise
     name: `${id} module`,
     version,
     compatibility: { platform: "^0.1.0", moduleSdk: "^0.1.0" },
+    ...(options.databaseAbi === 1 ? { database: { abi: 1 } } : {}),
     capabilities: [],
     permissions: [],
     entrypoints: {
@@ -108,7 +119,7 @@ export async function fixtureModule(options: FixtureModuleOptions = {}): Promise
         scripts: { build: "tsc" },
         dependencies: {
           "@ekklesia/module-sdk": "workspace:*",
-          ...(options.withModuleDatabase ? { "@ekklesia/module-database": "workspace:*" } : {}),
+          ...(usesModuleDatabase ? { "@ekklesia/module-database": "workspace:*" } : {}),
           "drizzle-orm": "0.45.2",
         },
         devDependencies: { typescript: "7.0.2" },
@@ -121,12 +132,15 @@ export async function fixtureModule(options: FixtureModuleOptions = {}): Promise
   );
   await write(
     path.join(moduleDirectory, "dist/server/index.js"),
-    options.serverSource ?? defaultServer(id, version),
+    options.serverSource ?? defaultServer(id, version, options.databaseAbi),
   );
   await write(path.join(moduleDirectory, "dist/server/index.js.map"), '{"version":3}\n');
   await write(path.join(moduleDirectory, "dist/server/index.d.ts"), "export {};\n");
   if (options.withSchema) {
-    await write(path.join(moduleDirectory, "dist/schema/index.js"), schemaSource(id));
+    await write(
+      path.join(moduleDirectory, "dist/schema/index.js"),
+      schemaSource(id, options.databaseAbi),
+    );
   }
   await write(path.join(moduleDirectory, "src/server/index.ts"), "export {};\n");
   await write(path.join(moduleDirectory, "tests/server.test.ts"), "export {};\n");
@@ -171,7 +185,7 @@ export async function fixtureModule(options: FixtureModuleOptions = {}): Promise
     await realpath(path.join(packageRoot, "node_modules", "@ekklesia", "module-sdk")),
     path.join(modules, "@ekklesia", "module-sdk"),
   );
-  if (options.withModuleDatabase) {
+  if (usesModuleDatabase) {
     await symlink(
       await realpath(path.join(packageRoot, "node_modules", "@ekklesia", "module-database")),
       path.join(modules, "@ekklesia", "module-database"),

packages/module-pack/tests/template-package.test.ts

@@ -31,11 +31,14 @@ async function readJson(file: string): Promise<Record<string, unknown>> {
   return JSON.parse(await readFile(file, "utf8")) as Record<string, unknown>;
 }
 
-async function platform() {
+async function platform(databaseRuntimeVersion?: string) {
   const core = await readJson(path.join(repositoryRoot, "core", "package.json"));
   return {
     databaseRuntime: {
-      "drizzle-orm": (core.dependencies as Record<string, string>)["drizzle-orm"] ?? "",
+      "drizzle-orm":
+        databaseRuntimeVersion ??
+        (core.dependencies as Record<string, string>)["drizzle-orm"] ??
+        "",
     },
     moduleSdkVersion: String(
       (await readJson(path.join(repositoryRoot, "packages", "module-sdk", "package.json"))).version,
@@ -96,6 +99,32 @@ describe("the module template as a Module Package v1", () => {
     expect(await treeListing(template)).toEqual(templateBefore);
   });
 
+  it("packages the canonical template as ABI v1 with Drizzle private to the module", async () => {
+    const { archive, result } = await packTemplate();
+    const files = fileEntries(archive);
+    const manifest = JSON.parse(files.get("example/ekklesia.module.json")?.toString("utf8") ?? "");
+    const metadata = JSON.parse(files.get("example/ekklesia.package.json")?.toString("utf8") ?? "");
+
+    expect(manifest.database).toEqual({ abi: 1 });
+    expect(metadata.transitional).toBeUndefined();
+    expect(metadata.incorporates).toMatchObject({
+      "@ekklesia/module-database": expect.any(String),
+    });
+    expect(
+      [...files.entries()].some(
+        ([file, data]) => file.endsWith(".js") && data.toString("utf8").includes("drizzle-orm"),
+      ),
+    ).toBe(true);
+
+    await expect(
+      verifyModulePackage({
+        archivePath: result.archivePath,
+        expectedSha256: result.sha256,
+        platform: await platform("99.0.0"),
+      }),
+    ).resolves.toMatchObject({ moduleId: "example" });
+  });
+
   it("verifies against this platform and extracts to an unrelated directory that holds no link", async () => {
     const { result } = await packTemplate();
     const target = path.join(await scratchDirectory("ekklesia-installed-elsewhere-"), "example");

pnpm-lock.yaml

@@ -441,6 +441,9 @@ importers:
       '@ekklesia/design-tokens':
         specifier: workspace:*
         version: link:../../packages/design-tokens
+      '@ekklesia/module-database':
+        specifier: workspace:*
+        version: link:../../packages/module-database
       '@ekklesia/module-sdk':
         specifier: workspace:*
         version: link:../../packages/module-sdk

templates/module/README.md

@@ -4,9 +4,10 @@ This is the smallest supported Ekklesia module product. It proves the static man
 compiled runtime and schema entrypoints, capability registration, a module-owned Drizzle table, a
 generated module-owned migration, logical storage-bucket declarations, and one permissioned HTTP
 route (`GET /records`, declared in `register`) that reads that table through
-`context.services.database` — the platform-provided `ModuleDatabase` facade, never a
-module-constructed Drizzle instance or a raw `pg` client. Migration execution and storage
-provisioning are intentionally not included.
+`@ekklesia/module-database/drizzle` over the platform-provided ABI-v1 executor. Drizzle stays a
+module-side implementation detail; Core receives SQL and bound values, never the module's ORM
+objects, a raw `pg` client, or connection configuration. Migration execution and storage provisioning
+are intentionally not included.
 
 It also ships two independently optional React roles: a primary/management UI at `src/ui/index.tsx`
 and a full-viewport display at `src/display/index.tsx`. One invocation of `pnpm build` compiles each
@@ -40,10 +41,11 @@ To create a module inside this repository:
    must match the manifest; do not duplicate the rest of the manifest in TypeScript. Declare HTTP
    routes only in `register`, against a permission the manifest already declares; `start`, `stop`,
    and every route handler — never `register` — receive `context.services.database`, a typed
-   `ModuleDatabase` view over the platform's one PostgreSQL pool.
+   Module Database ABI-v1 executor. Adapt it with `moduleDrizzle`; do not pass ORM objects to Core.
 6. Replace the pure Drizzle declarations in `src/schema/tables.ts` and keep its table prefix aligned
-   with the module ID. Keep the `defineModuleSchema` ownership wrapper in `src/schema/index.ts`
-   aligned too, and never import another module's schema.
+   with the module ID. Keep `moduleDrizzleSchemaMetadata` in `src/schema/index.ts` aligned too; it
+   exports plain ownership and foreign-key metadata, never ORM objects. Never import another
+   module's schema.
 7. Update `drizzle.config.ts`, generate forward migrations with `pnpm migration:generate
    --name=lowercase_name` from the module directory, and review the SQL. Keep each generated tag in
    `drizzle/meta/_ekklesia.json`, classify it as `none` or `approval-required`, and change that
@@ -72,9 +74,9 @@ surfaces and Core. A module UI asks its host for relative API paths and realtime
 hardcodes Ekklesia routes. The display permission is enforced by the host before it serves the page
 or descriptor; `context.permissions` remains a presentation-only hint.
 Keep imports side-effect-free, register capabilities in `register`, acquire resources in `start`,
-and release them in `stop`. Never construct a Drizzle instance, read `DATABASE_URL`, or reach for a
-raw `pg` client — `context.services.database` is the only supported way to query this module's own
-tables, and it is never available during `register`.
+and release them in `stop`. Construct Drizzle only through the module-side ABI adapter; never read
+`DATABASE_URL` or reach for a raw `pg` client. `context.services.database` is the only supported
+executor for this module's own tables, and it is never available during `register`.
 
 The migration directory uses the pinned stable Drizzle Kit `0.31.10` PostgreSQL journal and
 snapshot format. Migrations are forward-only and may modify only this module's objects. Offline

templates/module/ekklesia.module.json

@@ -8,6 +8,9 @@
     "platform": "^0.1.0",
     "moduleSdk": "^0.1.0"
   },
+  "database": {
+    "abi": 1
+  },
   "capabilities": [
     {
       "id": "example.records",

templates/module/package.json

@@ -29,6 +29,7 @@
   },
   "dependencies": {
     "@ekklesia/design-tokens": "workspace:*",
+    "@ekklesia/module-database": "workspace:*",
     "@ekklesia/module-sdk": "workspace:*",
     "@ekklesia/module-ui-sdk": "workspace:*",
     "@ekklesia/ui": "workspace:*",

templates/module/src/schema/index.ts

@@ -1,9 +1,6 @@
-import { defineModuleSchema } from "@ekklesia/module-sdk";
+import { moduleDrizzleSchemaMetadata } from "@ekklesia/module-database/drizzle";
 import { records } from "./tables.js";
 
 export { records } from "./tables.js";
 
-export default defineModuleSchema({
-  moduleId: "example",
-  tables: { records },
-});
+export default moduleDrizzleSchemaMetadata("example", { records });

templates/module/src/server/index.ts

@@ -1,3 +1,4 @@
+import { moduleDrizzle } from "@ekklesia/module-database/drizzle";
 import { defineModuleRuntime } from "@ekklesia/module-sdk";
 import { records } from "../schema/tables.js";
 
@@ -6,16 +7,17 @@ export const recordsCapability = Object.freeze({
 });
 
 export default defineModuleRuntime({
+  database: { abi: 1 },
   id: "example",
   version: "0.1.0",
   register({ capabilities, http }) {
     capabilities.provide("example.records", recordsCapability);
 
     // The accepted module database boundary: `context.services.database` — provided only to an
-    // authorized handler, never to `register` — is this module's one way to reach PostgreSQL. It
-    // is a fully typed Drizzle query surface over the module's own table (`../schema/tables.js`),
-    // never a raw `pg` client, a connection string, or a Drizzle instance this module built
-    // itself. `example.records.read` is declared in `ekklesia.module.json`, exactly like every
+    // authorized handler, never to `register` — is this module's ABI-v1 SQL executor. The adapter
+    // keeps this module's own Drizzle query builder and table types entirely module-side; Core sees
+    // only SQL text and bound values, never Drizzle objects, a raw `pg` client, or a connection
+    // string. `example.records.read` is declared in `ekklesia.module.json`, exactly like every
     // other permission a module route enforces.
     http.route({
       method: "GET",
@@ -28,9 +30,8 @@ export default defineModuleRuntime({
       // (`MODULE_ROUTE_MAX_BODY_BYTES_CEILING`, `@ekklesia/contracts`).
       maxBodyBytes: 0,
       async handler(_request, context) {
-        const rows = await context.services.database
-          .select({ id: records.id, value: records.value })
-          .from(records);
+        const database = moduleDrizzle(context.services.database);
+        const rows = await database.select({ id: records.id, value: records.value }).from(records);
         // The accepted module configuration boundary: `context.config` is a frozen, already
         // validated snapshot of exactly this module's own declared keys (ADR 0029). It reaches
         // `register`, `start`, `stop`, and every handler as the same object. This module never

templates/module/tests/manifest.test.ts

@@ -6,7 +6,7 @@ import {
   EMPTY_MODULE_CONFIGURATION,
   EMPTY_MODULE_STORAGE,
   type ModuleConfiguration,
-  type ModuleDatabase,
+  type ModuleDatabaseExecutor,
   type ModuleRouteDefinitionInput,
   type ModuleRouteHandlerContext,
   type ModuleRuntimeServices,
@@ -20,19 +20,34 @@ import { describe, expect, it } from "vitest";
 import moduleSchema, { records } from "../src/schema/index.js";
 import moduleRuntime, { recordsCapability } from "../src/server/index.js";
 
-/** A small typed fake `ModuleDatabase` — no PostgreSQL required for this unit test, which only
- * proves the example handler queries through the facade and shapes its response correctly. */
-function fakeModuleDatabase(rows: readonly { id: string; value: string }[]): ModuleDatabase {
-  const selectBuilder = { from: () => Promise.resolve(rows) };
-  return { select: () => selectBuilder } as unknown as ModuleDatabase;
+/** A small ABI-v1 executor — no PostgreSQL required for this unit test, which proves the template's
+ * module-side Drizzle adapter compiles its query to SQL and shapes the positional result. */
+function fakeModuleDatabase(
+  rows: readonly { id: string; value: string }[],
+): ModuleDatabaseExecutor {
+  return Object.freeze({
+    abiVersion: 1,
+    query: async () => ({
+      command: "SELECT",
+      fields: [
+        { name: "id", typeOid: 2950 },
+        { name: "value", typeOid: 25 },
+      ],
+      rowCount: rows.length,
+      rows: rows.map((row) => [row.id, row.value]),
+    }),
+    transaction: async () => {
+      throw new Error("The example read does not start a transaction.");
+    },
+  }) as unknown as ModuleDatabaseExecutor;
 }
 
 async function registerAndCaptureRoutes(): Promise<{
   provided: Map<CapabilityId, unknown>;
-  routes: ModuleRouteDefinitionInput[];
+  routes: ModuleRouteDefinitionInput<ModuleDatabaseExecutor>[];
 }> {
   const provided = new Map<CapabilityId, unknown>();
-  const routes: ModuleRouteDefinitionInput[] = [];
+  const routes: ModuleRouteDefinitionInput<ModuleDatabaseExecutor>[] = [];
   await moduleRuntime.register?.({
     // The template declares no configuration, so it receives an empty snapshot — proof that a
     // backend module needing no settings stays exactly as simple as it was (ADR 0029).
@@ -65,6 +80,7 @@ describe("module template", () => {
     const manifest = parseModuleManifest(manifestInput);
 
     expect(manifest.id).toBe("example");
+    expect(manifest.database).toEqual({ abi: 1 });
     expect(manifest.capabilities).toEqual([{ id: "example.records", version: "1.0.0" }]);
     expect(manifest.permissions).toEqual([
       {
@@ -122,7 +138,11 @@ describe("module template", () => {
   it("exports the typed runtime definition used by the compiled server entrypoint, registering its one example route database-free", async () => {
     const { provided, routes } = await registerAndCaptureRoutes();
 
-    expect(moduleRuntime).toMatchObject({ id: "example", version: "0.1.0" });
+    expect(moduleRuntime).toMatchObject({
+      database: { abi: 1 },
+      id: "example",
+      version: "0.1.0",
+    });
     expect(provided.get("example.records")).toBe(recordsCapability);
     expect(routes).toHaveLength(1);
     expect(routes[0]).toMatchObject({
@@ -143,10 +163,10 @@ describe("module template", () => {
     }
 
     const fakeRows = [{ id: "9d3f9f7e-3b1a-4c9a-8b8e-2b6b1e6f9a11", value: "hello" }];
-    const services: ModuleRuntimeServices = Object.freeze({
+    const services: ModuleRuntimeServices<ModuleDatabaseExecutor> = Object.freeze({
       database: fakeModuleDatabase(fakeRows),
     });
-    const context: ModuleRouteHandlerContext = Object.freeze({
+    const context: ModuleRouteHandlerContext<ModuleDatabaseExecutor> = Object.freeze({
       config: EMPTY_MODULE_CONFIGURATION,
       moduleId: "example",
       params: Object.freeze({}),
@@ -191,7 +211,7 @@ describe("module template", () => {
       has: (key: string) => key === "greeting",
       keys: () => Object.freeze(["greeting"]),
     });
-    const context: ModuleRouteHandlerContext = Object.freeze({
+    const context: ModuleRouteHandlerContext<ModuleDatabaseExecutor> = Object.freeze({
       config,
       moduleId: "example",
       params: Object.freeze({}),
@@ -228,9 +248,10 @@ describe("module template", () => {
     expect(manifest.configuration.some((entry) => entry.type === "secret")).toBe(false);
   });
 
-  it("exports a namespaced module-owned Drizzle schema", () => {
+  it("exports plain schema metadata derived from its namespaced module-owned Drizzle schema", () => {
     expect(moduleSchema.moduleId).toBe("example");
-    expect(moduleSchema.tables.records).toBe(records);
+    expect(moduleSchema.tables).toEqual([{ name: "example_records", foreignKeys: [] }]);
+    expect(JSON.parse(JSON.stringify(moduleSchema))).toEqual(moduleSchema);
     expect(getTableConfig(records)).toMatchObject({ name: "example_records", schema: undefined });
   });
 });