feat(turbo): turbo gen feature generator (Phase 1, single-entity)

Adds `pnpm turbo gen feature` to scaffold a Lazar-conformant feature
package matching the navigation reference shape: entity + Zod schema,
single use case (`get<Entity>`), controller, mock + Payload-stub real
repository (with span + capture), DI module/container/symbols, and tRPC
router with full BAD_REQUEST/NOT_FOUND error mapping. The generated
`bind-production.ts` and `bind-dev-seed.ts` compose the post-R44
`withSpan(tracer, opts, withCapture(logger, tags, factory(deps)))`
sandwich at bind time.

Verified by generating a sample `packages/example/` feature and running
`pnpm --filter @repo/example lint typecheck test` — all three pass
(9 test files, 25 tests). Cleaned up after verification so no example
package is committed.

Phase-1 limitations (documented in `docs/guides/scaffolding-a-feature.md`
and printed by the generator on success): no Payload CMS templates, no
React Query helpers, faker-driven factories left as stubs, single
entity / single use case, and aggregator wiring (core-api/root,
apps/web-next bindAll) is left as a manual checklist.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

turbo/generators/templates/feature/src/__contracts__/entity-repository.contract.ts.hbs

@@ -0,0 +1,55 @@
+import { it, expect, beforeEach, describe } from "vitest";
+import { defineContractSuite } from "@repo/core-testing/contract";
+import type { I{{pascalCase entity}}Repository } from "../application/repositories/{{kebabCase entity}}.repository.interface.js";
+import type { {{pascalCase entity}} } from "../entities/models/{{kebabCase entity}}.js";
+
+/**
+ * Known fixtures every implementation's `buildSubject` must pre-seed.
+ * Exported so test files can pass them to `Mock{{pascalCase entity}}Repository` or the
+ * Payload stub without duplicating definitions.
+ */
+export const CONTRACT_{{constantCase entity}}_SEED: ReadonlyArray<readonly [string, {{pascalCase entity}}]> = [
+  ["seed-1", { id: "seed-1", name: "Seed One" }],
+  ["seed-2", { id: "seed-2", name: "Seed Two" }],
+];
+
+/**
+ * Contract for I{{pascalCase entity}}Repository.
+ *
+ * The interface exposes only `get{{pascalCase entity}}(id)`. The contract verifies
+ * found vs missing behaviour and span emission.
+ */
+export const {{camelCase entity}}RepositoryContract = defineContractSuite<I{{pascalCase entity}}Repository>(
+  "I{{pascalCase entity}}Repository",
+  ({ buildSubject, getTracer }) => {
+    let repo: I{{pascalCase entity}}Repository;
+
+    beforeEach(async () => {
+      repo = await buildSubject();
+    });
+
+    it("get{{pascalCase entity}} returns the seeded {{camelCase entity}} when id exists", async () => {
+      const result = await repo.get{{pascalCase entity}}("seed-1");
+      expect(result).not.toBeNull();
+      expect(result?.id).toBe("seed-1");
+      expect(typeof result?.name).toBe("string");
+    });
+
+    it("get{{pascalCase entity}} returns null for an unknown id", async () => {
+      const result = await repo.get{{pascalCase entity}}("does-not-exist");
+      expect(result).toBeNull();
+    });
+
+    describe("span emission", () => {
+      it("get{{pascalCase entity}} emits span '{{camelCase entity}}.get{{pascalCase entity}}' with op=repository", async () => {
+        if (!getTracer) return;
+        const tracer = getTracer();
+        tracer.reset();
+        await repo.get{{pascalCase entity}}("seed-1");
+        const span = tracer.findSpan("{{camelCase entity}}.get{{pascalCase entity}}");
+        expect(span).toBeDefined();
+        expect(span!.op).toBe("repository");
+      });
+    });
+  },
+);

turbo/generators/templates/feature/src/__factories__/entity.factory.ts.hbs

@@ -0,0 +1,4 @@
+// Phase-1 stub. Replace with `defineFactory<{{pascalCase entity}}>` once the
+// entity shape stabilises. See packages/navigation/src/__factories__/ for an
+// example.
+export {};

turbo/generators/templates/feature/src/__factories__/index.ts.hbs

@@ -0,0 +1,3 @@
+// Phase-1 placeholder. Add faker-driven factories here once the entity
+// shape stabilises. See packages/blog/src/__factories__/ for the pattern.
+export {};

turbo/generators/templates/feature/src/__seeds__/dev.ts.hbs

@@ -0,0 +1,16 @@
+import type { {{pascalCase entity}} } from "../entities/models/{{kebabCase entity}}.js";
+
+/**
+ * Realistic dev seed for `bindDevSeed{{pascalCase name}}`.
+ *
+ * Phase-1: returns a small hand-rolled Map. Replace with a faker-driven
+ * `defineFactory` (see `packages/blog/src/__factories__/`) once the entity
+ * shape stabilises.
+ */
+export function buildDev{{pascalCase entity}}Map(): Map<string, {{pascalCase entity}}> {
+  return new Map<string, {{pascalCase entity}}>([
+    ["dev-1", { id: "dev-1", name: "Dev One" }],
+    ["dev-2", { id: "dev-2", name: "Dev Two" }],
+    ["dev-3", { id: "dev-3", name: "Dev Three" }],
+  ]);
+}

turbo/generators/templates/feature/src/application/repositories/entity.repository.interface.ts.hbs

@@ -0,0 +1,5 @@
+import type { {{pascalCase entity}} } from "../../entities/models/{{kebabCase entity}}";
+
+export interface I{{pascalCase entity}}Repository {
+  get{{pascalCase entity}}(id: string): Promise<{{pascalCase entity}} | null>;
+}

turbo/generators/templates/feature/src/application/use-cases/get-entity.use-case.test.ts.hbs

@@ -0,0 +1,31 @@
+import { describe, expect, it } from "vitest";
+import { ZodError } from "zod";
+import { get{{pascalCase entity}}UseCase } from "@/application/use-cases/get-{{kebabCase entity}}.use-case";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import { {{pascalCase entity}}NotFoundError } from "@/entities/errors/{{kebabCase entity}}";
+
+describe("get{{pascalCase entity}}UseCase", () => {
+  it("returns the seeded {{camelCase entity}} by id", async () => {
+    const repo = new Mock{{pascalCase entity}}Repository();
+    const useCase = get{{pascalCase entity}}UseCase(repo);
+    const result = await useCase({ id: "seed-1" });
+    expect(result.id).toBe("seed-1");
+    expect(result.name).toBeTypeOf("string");
+  });
+
+  it("throws {{pascalCase entity}}NotFoundError when repository returns null", async () => {
+    const repo = new Mock{{pascalCase entity}}Repository(new Map());
+    const useCase = get{{pascalCase entity}}UseCase(repo);
+    await expect(useCase({ id: "missing" })).rejects.toBeInstanceOf(
+      {{pascalCase entity}}NotFoundError,
+    );
+  });
+
+  it("throws ZodError when repository returns malformed data", async () => {
+    const malformedRepo = {
+      get{{pascalCase entity}}: async () => ({ id: "", name: "x" }) as never,
+    };
+    const useCase = get{{pascalCase entity}}UseCase(malformedRepo);
+    await expect(useCase({ id: "anything" })).rejects.toBeInstanceOf(ZodError);
+  });
+});

turbo/generators/templates/feature/src/application/use-cases/get-entity.use-case.ts.hbs

@@ -0,0 +1,30 @@
+import { z } from "zod";
+
+import { {{pascalCase entity}}NotFoundError } from "../../entities/errors/{{kebabCase entity}}";
+import { {{camelCase entity}}Schema } from "../../entities/models/{{kebabCase entity}}";
+import type { I{{pascalCase entity}}Repository } from "../repositories/{{kebabCase entity}}.repository.interface";
+
+// ── Input ────────────────────────────────────────────────────────────────
+export const get{{pascalCase entity}}InputSchema = z
+  .object({
+    id: z.string().min(1),
+  })
+  .strict();
+export type Get{{pascalCase entity}}Input = z.infer<typeof get{{pascalCase entity}}InputSchema>;
+
+// ── Output ───────────────────────────────────────────────────────────────
+export const get{{pascalCase entity}}OutputSchema = {{camelCase entity}}Schema;
+export type Get{{pascalCase entity}}Output = z.infer<typeof get{{pascalCase entity}}OutputSchema>;
+
+// ── Use case ─────────────────────────────────────────────────────────────
+export type IGet{{pascalCase entity}}UseCase = ReturnType<typeof get{{pascalCase entity}}UseCase>;
+
+export const get{{pascalCase entity}}UseCase =
+  ({{camelCase entity}}Repository: I{{pascalCase entity}}Repository) =>
+  async (input: Get{{pascalCase entity}}Input): Promise<Get{{pascalCase entity}}Output> => {
+    const result = await {{camelCase entity}}Repository.get{{pascalCase entity}}(input.id);
+    if (!result) {
+      throw new {{pascalCase entity}}NotFoundError(`{{pascalCase entity}} not found: ${input.id}`);
+    }
+    return get{{pascalCase entity}}OutputSchema.parse(result);
+  };

turbo/generators/templates/feature/src/di/bind-dev-seed.test.ts.hbs

@@ -0,0 +1,56 @@
+import "reflect-metadata";
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { NoopTracer, NoopLogger } from "@repo/core-shared/instrumentation";
+import { bindDevSeed{{pascalCase name}} } from "@/di/bind-dev-seed";
+import { {{camelCase name}}Container } from "@/di/container";
+import { {{constantCase name}}_SYMBOLS } from "@/di/symbols";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import type { I{{pascalCase entity}}Repository } from "@/application/repositories/{{kebabCase entity}}.repository.interface";
+
+const noop = { tracer: new NoopTracer(), logger: new NoopLogger() };
+
+describe("bindDevSeed{{pascalCase name}}", () => {
+  beforeEach(() => {
+    if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)) {
+      {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository);
+    }
+    {{camelCase name}}Container
+      .bind<I{{pascalCase entity}}Repository>({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)
+      .to(Mock{{pascalCase entity}}Repository);
+  });
+
+  afterEach(() => {
+    if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)) {
+      {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository);
+    }
+    {{camelCase name}}Container
+      .bind<I{{pascalCase entity}}Repository>({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)
+      .to(Mock{{pascalCase entity}}Repository);
+  });
+
+  it("populates the repository with the dev seed", async () => {
+    await bindDevSeed{{pascalCase name}}(noop.tracer, noop.logger);
+
+    const repo = {{camelCase name}}Container.get<I{{pascalCase entity}}Repository>(
+      {{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository,
+    );
+    const found = await repo.get{{pascalCase entity}}("dev-1");
+
+    expect(found).not.toBeNull();
+    expect(found?.id).toBe("dev-1");
+  });
+
+  it("is idempotent — calling twice rebuilds a fresh populated repo", async () => {
+    await bindDevSeed{{pascalCase name}}(noop.tracer, noop.logger);
+    const before = {{camelCase name}}Container.get<I{{pascalCase entity}}Repository>(
+      {{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository,
+    );
+
+    await bindDevSeed{{pascalCase name}}(noop.tracer, noop.logger);
+    const after = {{camelCase name}}Container.get<I{{pascalCase entity}}Repository>(
+      {{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository,
+    );
+
+    expect(after).not.toBe(before);
+  });
+});

turbo/generators/templates/feature/src/di/bind-dev-seed.ts.hbs

@@ -0,0 +1,82 @@
+import {
+  withSpan,
+  withCapture,
+  INSTRUMENTATION_SYMBOLS,
+  type ITracer,
+  type ILogger,
+} from "@repo/core-shared/instrumentation";
+import { {{camelCase name}}Container } from "./container.js";
+import { {{constantCase name}}_SYMBOLS } from "./symbols.js";
+import { Mock{{pascalCase entity}}Repository } from "../infrastructure/repositories/{{kebabCase entity}}.repository.mock.js";
+import { buildDev{{pascalCase entity}}Map } from "../__seeds__/dev.js";
+import { get{{pascalCase entity}}UseCase } from "../application/use-cases/get-{{kebabCase entity}}.use-case.js";
+import { get{{pascalCase entity}}Controller } from "../interface-adapters/controllers/get-{{kebabCase entity}}.controller.js";
+import type { I{{pascalCase entity}}Repository } from "../application/repositories/{{kebabCase entity}}.repository.interface.js";
+
+/**
+ * Replace the default mock with a populated one for dev mode + storybook.
+ *
+ * Mutually exclusive with `bindProduction{{pascalCase name}}(config, tracer, logger)`.
+ * Tests must NOT call this — they construct `new Mock{{pascalCase entity}}Repository()`
+ * directly and seed via factories per-test.
+ *
+ * Idempotent: safe to call multiple times; each call rebuilds a fresh
+ * populated repo and rebinds the symbol.
+ */
+export async function bindDevSeed{{pascalCase name}}(
+  tracer: ITracer,
+  logger: ILogger,
+): Promise<void> {
+  // Bind shared instrumentation into feature container
+  if ({{camelCase name}}Container.isBound(INSTRUMENTATION_SYMBOLS.TRACER)) {
+    {{camelCase name}}Container.unbind(INSTRUMENTATION_SYMBOLS.TRACER);
+  }
+  if ({{camelCase name}}Container.isBound(INSTRUMENTATION_SYMBOLS.LOGGER)) {
+    {{camelCase name}}Container.unbind(INSTRUMENTATION_SYMBOLS.LOGGER);
+  }
+  {{camelCase name}}Container.bind<ITracer>(INSTRUMENTATION_SYMBOLS.TRACER).toConstantValue(tracer);
+  {{camelCase name}}Container.bind<ILogger>(INSTRUMENTATION_SYMBOLS.LOGGER).toConstantValue(logger);
+
+  if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)) {
+    {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository);
+  }
+  const repo = new Mock{{pascalCase entity}}Repository(buildDev{{pascalCase entity}}Map(), tracer, logger);
+  {{camelCase name}}Container
+    .bind<I{{pascalCase entity}}Repository>({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)
+    .toConstantValue(repo);
+
+  // Wrap use case + controller identically to bind-production
+  const wrappedGet{{pascalCase entity}} = withSpan(
+    tracer,
+    { name: "{{camelCase name}}.get{{pascalCase entity}}", op: "use-case" },
+    withCapture(
+      logger,
+      { feature: "{{kebabCase name}}", layer: "use-case", name: "{{camelCase name}}.get{{pascalCase entity}}" },
+      get{{pascalCase entity}}UseCase(repo),
+    ),
+  );
+
+  for (const sym of [
+    {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase,
+    {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller,
+  ]) {
+    if ({{camelCase name}}Container.isBound(sym)) {{camelCase name}}Container.unbind(sym);
+  }
+  {{camelCase name}}Container
+    .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase)
+    .toConstantValue(wrappedGet{{pascalCase entity}});
+
+  {{camelCase name}}Container
+    .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller)
+    .toConstantValue(
+      withSpan(
+        tracer,
+        { name: "{{camelCase name}}.get{{pascalCase entity}}", op: "controller" },
+        withCapture(
+          logger,
+          { feature: "{{kebabCase name}}", layer: "controller", name: "{{camelCase name}}.get{{pascalCase entity}}" },
+          get{{pascalCase entity}}Controller(wrappedGet{{pascalCase entity}}),
+        ),
+      ),
+    );
+}

turbo/generators/templates/feature/src/di/bind-production.ts.hbs

@@ -0,0 +1,74 @@
+import type { SanitizedConfig } from "payload";
+import {
+  withSpan,
+  withCapture,
+  INSTRUMENTATION_SYMBOLS,
+  type ITracer,
+  type ILogger,
+} from "@repo/core-shared/instrumentation";
+import { {{camelCase name}}Container } from "./container";
+import { {{constantCase name}}_SYMBOLS } from "./symbols";
+import { {{pascalCase entity}}Repository } from "../infrastructure/repositories/{{kebabCase entity}}.repository";
+import { get{{pascalCase entity}}UseCase } from "../application/use-cases/get-{{kebabCase entity}}.use-case";
+import { get{{pascalCase entity}}Controller } from "../interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+
+export function bindProduction{{pascalCase name}}(
+  config: SanitizedConfig,
+  tracer: ITracer,
+  logger: ILogger,
+): void {
+  // Bind shared instrumentation into feature container
+  if ({{camelCase name}}Container.isBound(INSTRUMENTATION_SYMBOLS.TRACER)) {
+    {{camelCase name}}Container.unbind(INSTRUMENTATION_SYMBOLS.TRACER);
+  }
+  if ({{camelCase name}}Container.isBound(INSTRUMENTATION_SYMBOLS.LOGGER)) {
+    {{camelCase name}}Container.unbind(INSTRUMENTATION_SYMBOLS.LOGGER);
+  }
+  {{camelCase name}}Container.bind<ITracer>(INSTRUMENTATION_SYMBOLS.TRACER).toConstantValue(tracer);
+  {{camelCase name}}Container.bind<ILogger>(INSTRUMENTATION_SYMBOLS.LOGGER).toConstantValue(logger);
+
+  // Real repository
+  if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)) {
+    {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository);
+  }
+  const repo = new {{pascalCase entity}}Repository(config, tracer, logger);
+  {{camelCase name}}Container
+    .bind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)
+    .toConstantValue(repo);
+
+  // Use case — wrapped with span + capture at bind time
+  const wrappedGet{{pascalCase entity}} = withSpan(
+    tracer,
+    { name: "{{camelCase name}}.get{{pascalCase entity}}", op: "use-case" },
+    withCapture(
+      logger,
+      { feature: "{{kebabCase name}}", layer: "use-case", name: "{{camelCase name}}.get{{pascalCase entity}}" },
+      get{{pascalCase entity}}UseCase(repo),
+    ),
+  );
+
+  if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase)) {
+    {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase);
+  }
+  {{camelCase name}}Container
+    .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase)
+    .toConstantValue(wrappedGet{{pascalCase entity}});
+
+  // Controller — wrapped with span at bind time
+  if ({{camelCase name}}Container.isBound({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller)) {
+    {{camelCase name}}Container.unbind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller);
+  }
+  {{camelCase name}}Container
+    .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller)
+    .toConstantValue(
+      withSpan(
+        tracer,
+        { name: "{{camelCase name}}.get{{pascalCase entity}}", op: "controller" },
+        withCapture(
+          logger,
+          { feature: "{{kebabCase name}}", layer: "controller", name: "{{camelCase name}}.get{{pascalCase entity}}" },
+          get{{pascalCase entity}}Controller(wrappedGet{{pascalCase entity}}),
+        ),
+      ),
+    );
+}

turbo/generators/templates/feature/src/di/container.test.ts.hbs

@@ -0,0 +1,40 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { {{camelCase name}}Container } from "./container";
+import { {{constantCase name}}_SYMBOLS } from "./symbols";
+import { {{pascalCase name}}Module } from "./module";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import type { I{{pascalCase entity}}Repository } from "@/application/repositories/{{kebabCase entity}}.repository.interface";
+import type { IGet{{pascalCase entity}}UseCase } from "@/application/use-cases/get-{{kebabCase entity}}.use-case";
+import type { IGet{{pascalCase entity}}Controller } from "@/interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+
+describe("{{camelCase name}}Container", () => {
+  beforeEach(() => {
+    {{camelCase name}}Container.unbindAll();
+    {{camelCase name}}Container.load({{pascalCase name}}Module);
+  });
+
+  afterEach(() => {
+    {{camelCase name}}Container.unbindAll();
+  });
+
+  it("resolves I{{pascalCase entity}}Repository to Mock{{pascalCase entity}}Repository", () => {
+    const repo = {{camelCase name}}Container.get<I{{pascalCase entity}}Repository>(
+      {{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository,
+    );
+    expect(repo).toBeInstanceOf(Mock{{pascalCase entity}}Repository);
+  });
+
+  it("resolves IGet{{pascalCase entity}}UseCase as a function", () => {
+    const useCase = {{camelCase name}}Container.get<IGet{{pascalCase entity}}UseCase>(
+      {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase,
+    );
+    expect(typeof useCase).toBe("function");
+  });
+
+  it("resolves IGet{{pascalCase entity}}Controller as a function", () => {
+    const controller = {{camelCase name}}Container.get<IGet{{pascalCase entity}}Controller>(
+      {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller,
+    );
+    expect(typeof controller).toBe("function");
+  });
+});

turbo/generators/templates/feature/src/di/container.ts.hbs

@@ -0,0 +1,6 @@
+import "reflect-metadata";
+import { Container } from "inversify";
+import { {{pascalCase name}}Module } from "./module";
+
+export const {{camelCase name}}Container = new Container({ defaultScope: "Singleton" });
+{{camelCase name}}Container.load({{pascalCase name}}Module);

turbo/generators/templates/feature/src/di/module.ts.hbs

@@ -0,0 +1,39 @@
+import { ContainerModule, type interfaces } from "inversify";
+
+import type { I{{pascalCase entity}}Repository } from "../application/repositories/{{kebabCase entity}}.repository.interface";
+import { Mock{{pascalCase entity}}Repository } from "../infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import {
+  get{{pascalCase entity}}UseCase,
+  type IGet{{pascalCase entity}}UseCase,
+} from "../application/use-cases/get-{{kebabCase entity}}.use-case";
+import {
+  get{{pascalCase entity}}Controller,
+  type IGet{{pascalCase entity}}Controller,
+} from "../interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+import { {{constantCase name}}_SYMBOLS } from "./symbols";
+
+export const {{pascalCase name}}Module = new ContainerModule((bind: interfaces.Bind) => {
+  bind<I{{pascalCase entity}}Repository>({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository).to(
+    Mock{{pascalCase entity}}Repository,
+  );
+
+  bind<IGet{{pascalCase entity}}UseCase>(
+    {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase,
+  ).toDynamicValue((ctx) =>
+    get{{pascalCase entity}}UseCase(
+      ctx.container.get<I{{pascalCase entity}}Repository>(
+        {{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository,
+      ),
+    ),
+  );
+
+  bind<IGet{{pascalCase entity}}Controller>(
+    {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller,
+  ).toDynamicValue((ctx) =>
+    get{{pascalCase entity}}Controller(
+      ctx.container.get<IGet{{pascalCase entity}}UseCase>(
+        {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase,
+      ),
+    ),
+  );
+});

turbo/generators/templates/feature/src/di/symbols.ts.hbs

@@ -0,0 +1,7 @@
+export const {{constantCase name}}_SYMBOLS = {
+  I{{pascalCase entity}}Repository: Symbol.for("{{kebabCase name}}:I{{pascalCase entity}}Repository"),
+  // Use cases
+  IGet{{pascalCase entity}}UseCase: Symbol.for("{{kebabCase name}}:IGet{{pascalCase entity}}UseCase"),
+  // Controllers
+  IGet{{pascalCase entity}}Controller: Symbol.for("{{kebabCase name}}:IGet{{pascalCase entity}}Controller"),
+} as const;

turbo/generators/templates/feature/src/entities/errors/common.ts.hbs

@@ -0,0 +1,6 @@
+export class InputParseError extends Error {
+  constructor(message: string, options?: ErrorOptions) {
+    super(message, options);
+    this.name = "InputParseError";
+  }
+}

turbo/generators/templates/feature/src/entities/errors/entity.ts.hbs

@@ -0,0 +1,6 @@
+export class {{pascalCase entity}}NotFoundError extends Error {
+  constructor(message = "{{pascalCase entity}} not found", options?: ErrorOptions) {
+    super(message, options);
+    this.name = "{{pascalCase entity}}NotFoundError";
+  }
+}

turbo/generators/templates/feature/src/entities/models/entity.test.ts.hbs

@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import { {{camelCase entity}}Schema } from "./{{kebabCase entity}}";
+
+describe("{{camelCase entity}}Schema", () => {
+  it("accepts a valid {{camelCase entity}}", () => {
+    const result = {{camelCase entity}}Schema.parse({ id: "1", name: "Example" });
+    expect(result.id).toBe("1");
+    expect(result.name).toBe("Example");
+  });
+
+  it("rejects an empty id", () => {
+    expect(() => {{camelCase entity}}Schema.parse({ id: "", name: "ok" })).toThrow();
+  });
+
+  it("rejects an empty name", () => {
+    expect(() => {{camelCase entity}}Schema.parse({ id: "1", name: "" })).toThrow();
+  });
+
+  it("rejects a name over 128 chars", () => {
+    expect(() =>
+      {{camelCase entity}}Schema.parse({ id: "1", name: "x".repeat(129) }),
+    ).toThrow();
+  });
+});

turbo/generators/templates/feature/src/entities/models/entity.ts.hbs

@@ -0,0 +1,8 @@
+import { z } from "zod";
+
+export const {{camelCase entity}}Schema = z.object({
+  id: z.string().min(1),
+  name: z.string().min(1).max(128),
+});
+
+export type {{pascalCase entity}} = z.infer<typeof {{camelCase entity}}Schema>;

turbo/generators/templates/feature/src/index.ts.hbs

@@ -0,0 +1,16 @@
+export type { {{pascalCase entity}} } from "./entities/models/{{kebabCase entity}}";
+export type { {{pascalCase name}}Router } from "./integrations/api/router";
+export { {{pascalCase entity}}NotFoundError } from "./entities/errors/{{kebabCase entity}}";
+export { InputParseError } from "./entities/errors/common";
+
+// Use case schemas + types
+export {
+  get{{pascalCase entity}}InputSchema,
+  get{{pascalCase entity}}OutputSchema,
+  type Get{{pascalCase entity}}Input,
+  type Get{{pascalCase entity}}Output,
+  type IGet{{pascalCase entity}}UseCase,
+} from "./application/use-cases/get-{{kebabCase entity}}.use-case";
+
+// Controller type aliases
+export type { IGet{{pascalCase entity}}Controller } from "./interface-adapters/controllers/get-{{kebabCase entity}}.controller";

turbo/generators/templates/feature/src/infrastructure/repositories/entity.repository.mock.test.ts.hbs

@@ -0,0 +1,15 @@
+import { describe } from "vitest";
+import { RecordingTracer } from "@repo/core-testing/instrumentation";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import {
+  {{camelCase entity}}RepositoryContract,
+  CONTRACT_{{constantCase entity}}_SEED,
+} from "@/__contracts__/{{kebabCase entity}}-repository.contract";
+
+describe("Mock{{pascalCase entity}}Repository", () => {
+  const tracer = new RecordingTracer();
+  {{camelCase entity}}RepositoryContract.run(
+    () => new Mock{{pascalCase entity}}Repository(new Map(CONTRACT_{{constantCase entity}}_SEED), tracer),
+    { tracer: () => tracer },
+  );
+});

turbo/generators/templates/feature/src/infrastructure/repositories/entity.repository.mock.ts.hbs

@@ -0,0 +1,45 @@
+import "reflect-metadata";
+import { injectable } from "inversify";
+import {
+  NoopTracer,
+  NoopLogger,
+  type ITracer,
+  type ILogger,
+} from "@repo/core-shared/instrumentation";
+
+import type { I{{pascalCase entity}}Repository } from "../../application/repositories/{{kebabCase entity}}.repository.interface";
+import type { {{pascalCase entity}} } from "../../entities/models/{{kebabCase entity}}";
+
+const DEFAULT_DATA = new Map<string, {{pascalCase entity}}>([
+  ["seed-1", { id: "seed-1", name: "Seed One" }],
+  ["seed-2", { id: "seed-2", name: "Seed Two" }],
+]);
+
+@injectable()
+export class Mock{{pascalCase entity}}Repository implements I{{pascalCase entity}}Repository {
+  private readonly data: Map<string, {{pascalCase entity}}>;
+  private tracer: ITracer;
+  private logger: ILogger;
+
+  constructor(
+    initialData?: Map<string, {{pascalCase entity}}>,
+    tracer: ITracer = new NoopTracer(),
+    logger: ILogger = new NoopLogger(),
+  ) {
+    this.data = initialData ?? new Map(DEFAULT_DATA);
+    this.tracer = tracer;
+    this.logger = logger;
+    void this.logger; // currently unused; reserved for future mock-thrown captures
+  }
+
+  async get{{pascalCase entity}}(id: string): Promise<{{pascalCase entity}} | null> {
+    return this.tracer.startSpan(
+      { name: "{{camelCase entity}}.get{{pascalCase entity}}", op: "repository", attributes: {} },
+      async (span) => {
+        const found = this.data.get(id) ?? null;
+        span.setAttribute("found", found !== null);
+        return found;
+      },
+    );
+  }
+}

turbo/generators/templates/feature/src/infrastructure/repositories/entity.repository.span.test.ts.hbs

@@ -0,0 +1,19 @@
+import { describe, it, expect } from "vitest";
+import { RecordingTracer, RecordingLogger } from "@repo/core-testing/instrumentation";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+
+// Mock repo also wraps in spans (R42).
+describe("Mock{{pascalCase entity}}Repository emits spans", () => {
+  it("get{{pascalCase entity}} emits one span with op='repository'", async () => {
+    const tracer = new RecordingTracer();
+    const logger = new RecordingLogger();
+    const repo = new Mock{{pascalCase entity}}Repository(undefined, tracer, logger);
+    await repo.get{{pascalCase entity}}("seed-1");
+    expect(tracer.spans).toHaveLength(1);
+    expect(tracer.spans[0]).toMatchObject({
+      name: "{{camelCase entity}}.get{{pascalCase entity}}",
+      op: "repository",
+    });
+    expect(typeof tracer.spans[0]!.attributes.found).toBe("boolean");
+  });
+});

turbo/generators/templates/feature/src/infrastructure/repositories/entity.repository.test.ts.hbs

@@ -0,0 +1,34 @@
+import { describe, it, expect } from "vitest";
+import { RecordingTracer, RecordingLogger } from "@repo/core-testing/instrumentation";
+import { stubPayloadConfig } from "@repo/core-testing/payload/stub-config";
+import { {{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository";
+
+// Phase-1 scaffold: the real repository returns null until the Payload
+// collection is wired. These tests pin the span shape and the stub return
+// value so that callers (use case + DI tests) keep working when the body is
+// later replaced with a real `payload.find()` call.
+
+describe("{{pascalCase entity}}Repository (Phase-1 stub)", () => {
+  it("returns null and emits a span with op='repository'", async () => {
+    const tracer = new RecordingTracer();
+    const logger = new RecordingLogger();
+    const repo = new {{pascalCase entity}}Repository(stubPayloadConfig, tracer, logger);
+
+    const result = await repo.get{{pascalCase entity}}("anything");
+
+    expect(result).toBeNull();
+    expect(tracer.spans).toHaveLength(1);
+    expect(tracer.spans[0]).toMatchObject({
+      name: "{{camelCase entity}}.get{{pascalCase entity}}",
+      op: "repository",
+    });
+  });
+
+  it("records the requested id as a span attribute", async () => {
+    const tracer = new RecordingTracer();
+    const repo = new {{pascalCase entity}}Repository(stubPayloadConfig, tracer);
+    await repo.get{{pascalCase entity}}("custom-id");
+    expect(tracer.spans[0]!.attributes.id).toBe("custom-id");
+    expect(tracer.spans[0]!.attributes.found).toBe(false);
+  });
+});

turbo/generators/templates/feature/src/infrastructure/repositories/entity.repository.ts.hbs

@@ -0,0 +1,62 @@
+import "reflect-metadata";
+import { injectable } from "inversify";
+import type { SanitizedConfig } from "payload";
+import {
+  NoopTracer,
+  NoopLogger,
+  type ITracer,
+  type ILogger,
+} from "@repo/core-shared/instrumentation";
+
+import type { I{{pascalCase entity}}Repository } from "../../application/repositories/{{kebabCase entity}}.repository.interface";
+import type { {{pascalCase entity}} } from "../../entities/models/{{kebabCase entity}}";
+
+const FEATURE = "{{kebabCase name}}" as const;
+const REPO = "{{kebabCase entity}}" as const;
+
+/**
+ * Phase-1 scaffold — the Payload collection has not been added yet, so this
+ * repository emits a span but always resolves to `null`. Once you add the
+ * collection at `integrations/cms/collections/{{kebabCase entity}}.ts` and
+ * register it with Payload, replace the stub below with a real `payload.find`
+ * call (see `packages/blog/src/infrastructure/repositories/articles.repository.ts`
+ * for the canonical pattern).
+ */
+@injectable()
+export class {{pascalCase entity}}Repository implements I{{pascalCase entity}}Repository {
+  private config: SanitizedConfig;
+  private tracer: ITracer;
+  private logger: ILogger;
+
+  constructor(
+    config: SanitizedConfig,
+    tracer: ITracer = new NoopTracer(),
+    logger: ILogger = new NoopLogger(),
+  ) {
+    this.config = config;
+    this.tracer = tracer;
+    this.logger = logger;
+    void this.config;
+  }
+
+  async get{{pascalCase entity}}(id: string): Promise<{{pascalCase entity}} | null> {
+    return this.tracer.startSpan(
+      { name: "{{camelCase entity}}.get{{pascalCase entity}}", op: "repository", attributes: {} },
+      async (span) => {
+        try {
+          // TODO: replace with `payload.find({ collection: "{{entityPlural}}", where: { id: { equals: id } } })`
+          // once the Payload collection is registered.
+          span.setAttribute("id", id);
+          span.setAttribute("found", false);
+          return null;
+        } catch (err) {
+          this.logger.captureException(err, {
+            tags: { feature: FEATURE, repo: REPO, method: "get{{pascalCase entity}}" },
+          });
+          span.setStatus("error", err instanceof Error ? err.message : String(err));
+          throw err;
+        }
+      },
+    );
+  }
+}

turbo/generators/templates/feature/src/integrations/api/procedures.ts.hbs

@@ -0,0 +1,12 @@
+import { t } from "@repo/core-shared/trpc/init";
+import { defineErrorMiddleware } from "@repo/core-shared/trpc/define-error-middleware";
+
+import { {{pascalCase entity}}NotFoundError } from "../../entities/errors/{{kebabCase entity}}";
+import { InputParseError } from "../../entities/errors/common";
+
+export const {{camelCase name}}Procedure = t.procedure.use(
+  defineErrorMiddleware([
+    [InputParseError, "BAD_REQUEST"],
+    [{{pascalCase entity}}NotFoundError, "NOT_FOUND"],
+  ]),
+);

turbo/generators/templates/feature/src/integrations/api/router.test.ts.hbs

@@ -0,0 +1,93 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { TRPCError } from "@trpc/server";
+import { injectable } from "inversify";
+import { {{camelCase name}}Container } from "@/di/container";
+import { {{pascalCase name}}Module } from "@/di/module";
+import { {{constantCase name}}_SYMBOLS } from "@/di/symbols";
+import { get{{pascalCase entity}}UseCase } from "@/application/use-cases/get-{{kebabCase entity}}.use-case";
+import { get{{pascalCase entity}}Controller } from "@/interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+import { {{camelCase name}}Router } from "@/integrations/api/router";
+
+describe("{{camelCase name}}Router", () => {
+  beforeEach(() => {
+    {{camelCase name}}Container.unbindAll();
+    {{camelCase name}}Container.load({{pascalCase name}}Module);
+  });
+
+  afterEach(() => {
+    {{camelCase name}}Container.unbindAll();
+  });
+
+  it("exposes the get{{pascalCase entity}} procedure", () => {
+    const names = Object.keys({{camelCase name}}Router._def.procedures);
+    expect(names).toContain("get{{pascalCase entity}}");
+  });
+
+  it("get{{pascalCase entity}} returns the seeded {{camelCase entity}}", async () => {
+    const caller = {{camelCase name}}Router.createCaller({});
+    const result = await caller.get{{pascalCase entity}}({ id: "seed-1" });
+    expect(result.id).toBe("seed-1");
+  });
+});
+
+describe("{{camelCase name}}Router (error mapping)", () => {
+  beforeEach(() => {
+    {{camelCase name}}Container.unbindAll();
+    {{camelCase name}}Container.load({{pascalCase name}}Module);
+  });
+
+  afterEach(() => {
+    {{camelCase name}}Container.unbindAll();
+  });
+
+  it("translates InputParseError → BAD_REQUEST when extra fields are passed", async () => {
+    const caller = {{camelCase name}}Router.createCaller({});
+    try {
+      await caller.get{{pascalCase entity}}({
+        id: "seed-1",
+        unexpected: "field",
+      } as unknown as { id: string });
+      throw new Error("expected throw");
+    } catch (e) {
+      expect(e).toBeInstanceOf(TRPCError);
+      expect((e as TRPCError).code).toBe("BAD_REQUEST");
+    }
+  });
+
+  it("translates {{pascalCase entity}}NotFoundError → NOT_FOUND when repository returns null", async () => {
+    @injectable()
+    class Null{{pascalCase entity}}Repository {
+      async get{{pascalCase entity}}() {
+        return null;
+      }
+    }
+
+    {{camelCase name}}Container.unbindAll();
+    {{camelCase name}}Container
+      .bind({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository)
+      .to(Null{{pascalCase entity}}Repository);
+    {{camelCase name}}Container
+      .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase)
+      .toDynamicValue((ctx) =>
+        get{{pascalCase entity}}UseCase(
+          ctx.container.get({{constantCase name}}_SYMBOLS.I{{pascalCase entity}}Repository),
+        ),
+      );
+    {{camelCase name}}Container
+      .bind({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller)
+      .toDynamicValue((ctx) =>
+        get{{pascalCase entity}}Controller(
+          ctx.container.get({{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}UseCase),
+        ),
+      );
+
+    const caller = {{camelCase name}}Router.createCaller({});
+    try {
+      await caller.get{{pascalCase entity}}({ id: "anything" });
+      throw new Error("expected throw");
+    } catch (e) {
+      expect(e).toBeInstanceOf(TRPCError);
+      expect((e as TRPCError).code).toBe("NOT_FOUND");
+    }
+  });
+});

turbo/generators/templates/feature/src/integrations/api/router.ts.hbs

@@ -0,0 +1,22 @@
+import { router } from "@repo/core-shared/trpc/init";
+
+import { {{camelCase name}}Container } from "../../di/container";
+import { {{constantCase name}}_SYMBOLS } from "../../di/symbols";
+
+import { get{{pascalCase entity}}InputSchema } from "../../application/use-cases/get-{{kebabCase entity}}.use-case";
+import type { IGet{{pascalCase entity}}Controller } from "../../interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+
+import { {{camelCase name}}Procedure } from "./procedures";
+
+export const {{camelCase name}}Router = router({
+  get{{pascalCase entity}}: {{camelCase name}}Procedure
+    .input(get{{pascalCase entity}}InputSchema)
+    .query(({ input }) => {
+      const ctrl = {{camelCase name}}Container.get<IGet{{pascalCase entity}}Controller>(
+        {{constantCase name}}_SYMBOLS.IGet{{pascalCase entity}}Controller,
+      );
+      return ctrl(input);
+    }),
+});
+
+export type {{pascalCase name}}Router = typeof {{camelCase name}}Router;

turbo/generators/templates/feature/src/interface-adapters/controllers/get-entity.controller.test.ts.hbs

@@ -0,0 +1,35 @@
+import { describe, expect, it } from "vitest";
+import { get{{pascalCase entity}}Controller } from "@/interface-adapters/controllers/get-{{kebabCase entity}}.controller";
+import { get{{pascalCase entity}}UseCase } from "@/application/use-cases/get-{{kebabCase entity}}.use-case";
+import { Mock{{pascalCase entity}}Repository } from "@/infrastructure/repositories/{{kebabCase entity}}.repository.mock";
+import { InputParseError } from "@/entities/errors/common";
+
+describe("get{{pascalCase entity}}Controller", () => {
+  it("returns the {{camelCase entity}} for a valid id", async () => {
+    const repo = new Mock{{pascalCase entity}}Repository();
+    const useCase = get{{pascalCase entity}}UseCase(repo);
+    const controller = get{{pascalCase entity}}Controller(useCase);
+
+    const result = await controller({ id: "seed-1" });
+
+    expect(result.id).toBe("seed-1");
+  });
+
+  it("throws InputParseError when input is missing fields", async () => {
+    const repo = new Mock{{pascalCase entity}}Repository();
+    const useCase = get{{pascalCase entity}}UseCase(repo);
+    const controller = get{{pascalCase entity}}Controller(useCase);
+
+    await expect(controller({})).rejects.toBeInstanceOf(InputParseError);
+  });
+
+  it("throws InputParseError when input has unexpected fields (strict)", async () => {
+    const repo = new Mock{{pascalCase entity}}Repository();
+    const useCase = get{{pascalCase entity}}UseCase(repo);
+    const controller = get{{pascalCase entity}}Controller(useCase);
+
+    await expect(
+      controller({ id: "seed-1", unexpected: true }),
+    ).rejects.toBeInstanceOf(InputParseError);
+  });
+});

turbo/generators/templates/feature/src/interface-adapters/controllers/get-entity.controller.ts.hbs

@@ -0,0 +1,23 @@
+import { InputParseError } from "../../entities/errors/common";
+import {
+  get{{pascalCase entity}}InputSchema,
+  type Get{{pascalCase entity}}Output,
+  type IGet{{pascalCase entity}}UseCase,
+} from "../../application/use-cases/get-{{kebabCase entity}}.use-case";
+
+function presenter(value: Get{{pascalCase entity}}Output) {
+  return value;
+}
+
+export type IGet{{pascalCase entity}}Controller = ReturnType<typeof get{{pascalCase entity}}Controller>;
+
+export const get{{pascalCase entity}}Controller =
+  (get{{pascalCase entity}}UseCase: IGet{{pascalCase entity}}UseCase) =>
+  async (input: unknown): Promise<ReturnType<typeof presenter>> => {
+    const parsed = get{{pascalCase entity}}InputSchema.safeParse(input);
+    if (!parsed.success) {
+      throw new InputParseError("Invalid get-{{kebabCase entity}} input", { cause: parsed.error });
+    }
+    const result = await get{{pascalCase entity}}UseCase(parsed.data);
+    return presenter(result);
+  };

turbo/generators/templates/feature/src/ui/index.ts.hbs

@@ -0,0 +1,4 @@
+// Phase-1 placeholder. Re-export React Query option builders here once you
+// add `ui/query.ts`. See packages/navigation/src/ui/index.ts for the
+// canonical shape.
+export {};