Imported from gabrielmoreira/agent-skills-mirror (mirrors/repos/webiny@webiny-js/skills/user-skills/api/permissions/SKILL.md). Install upstream with npx skills add gabrielmoreira/agent-skills-mirror --skill permissions. Copyright stays with the author.

API Permissions

Overview

Permissions follow two layers: domain (schema) and features (DI abstractions + feature registration). Each package declares a permission schema and gets a typed Permissions abstraction injectable into use cases via DI. Methods like canRead, canEdit, canDelete, canPublish, onlyOwnRecords replace manual identityContext.getPermission() calls.

Layer 1: Domain — Permission Schema

Define the schema in src/domain/permissionsSchema.ts:

import { createPermissionSchema } from "webiny/api/security";

export const SM_PERMISSIONS_SCHEMA = createPermissionSchema({
  prefix: "sm",
  fullAccess: true,
  entities: [
    {
      id: "product",
      permission: "sm.product",
      scopes: ["full", "own"],
      actions: [{ name: "rwd" }, { name: "pw" }]
    },
    {
      id: "settings",
      permission: "sm.settings",
      scopes: ["full"]
    }
  ]
});

The schema MUST use as const inference (handled by createPermissionSchema) for TypeScript to narrow entity IDs in method signatures.

Schema Fields

Scopes

• "full" — User can access all records (default when no own flag on permission object)
• "own" — User can only access records where createdBy.id === identity.id

Simple Apps (No Entities)

Omit entities for binary full/no access:

export const MA_PERMISSIONS_SCHEMA = createPermissionSchema({
  prefix: "ma",
  fullAccess: true
});

Layer 2: Features — DI Artifacts + Registration

Abstraction (src/features/permissions/abstractions.ts)

import { createPermissionsAbstraction } from "webiny/api/security";
import type { Permissions } from "webiny/api/security";
import { SM_PERMISSIONS_SCHEMA } from "~/domain/permissionsSchema.js";

export const SmPermissions = createPermissionsAbstraction(SM_PERMISSIONS_SCHEMA);

export namespace SmPermissions {
  export type Interface = Permissions<typeof SM_PERMISSIONS_SCHEMA>;
}

Feature (src/features/permissions/feature.ts)

import { createPermissionsFeature } from "webiny/api/security";
import { SM_PERMISSIONS_SCHEMA } from "~/domain/permissionsSchema.js";
import { SmPermissions } from "./abstractions.js";

export const SmPermissionsFeature = createPermissionsFeature(SM_PERMISSIONS_SCHEMA, SmPermissions);

Registration

Register the feature in your context plugin:

import { SmPermissionsFeature } from "~/features/permissions/feature.js";

// In createContext:
SmPermissionsFeature.register(container);

File Structure

src/
├── domain/
│   └── permissionsSchema.ts              # createPermissionSchema()
├── features/
│   └── permissions/
│       ├── abstractions.ts               # createPermissionsAbstraction() + namespace type
│       └── feature.ts                    # createPermissionsFeature()
└── index.ts                              # SmPermissionsFeature.register(container)

Permission Methods

All methods follow a 3-tier bypass:

1. identityContext.hasFullAccess() → name: "*" permission (super admin)
2. hasFullSchemaAccess() → wildcard permission (e.g. "sm.*")
3. Entity-level permission check

Method Reference

All return Promise<boolean>. Entity IDs are fully typed — canRead("bogus") produces a type error.

OwnableItem Interface

interface OwnableItem {
  createdBy?: { id: string } | null;
}

Use Case Implementation Patterns

Get Use Case (Read + Ownership Gate)

The Get use case is the central ownership gate — mutation use cases that delegate to GetById inherit ownership enforcement automatically.

import { Result } from "webiny/api";
import { GetByIdUseCase as UseCaseAbstraction, GetByIdRepository } from "./abstractions.js";
import { SmPermissions } from "~/features/permissions/abstractions.js";
import { NotAuthorizedError } from "~/domain/errors.js";

class GetByIdUseCaseImpl implements UseCaseAbstraction.Interface {
  constructor(
    private permissions: SmPermissions.Interface,
    private repository: GetByIdRepository.Interface
  ) {}

  async execute(id: string): UseCaseAbstraction.Return {
    // 1. Entity-level read check
    if (!(await this.permissions.canRead("product"))) {
      return Result.fail(new NotAuthorizedError());
    }

    // 2. Fetch
    const result = await this.repository.execute(id);
    if (result.isFail()) {
      return result;
    }

    // 3. Item-level ownership check
    if (!(await this.permissions.canAccess("product", result.value))) {
      return Result.fail(new NotAuthorizedError());
    }

    return result;
  }
}

export const GetByIdUseCase = UseCaseAbstraction.createImplementation({
  implementation: GetByIdUseCaseImpl,
  dependencies: [SmPermissions, GetByIdRepository]
});

List Use Case (Read + Own Records Filter)

import { IdentityContext } from "webiny/api/security";

class ListUseCaseImpl implements UseCaseAbstraction.Interface {
  constructor(
    private permissions: SmPermissions.Interface,
    private identityContext: IdentityContext.Interface,
    private repository: ListRepository.Interface
  ) {}

  async execute(params: UseCaseAbstraction.Params): UseCaseAbstraction.Return {
    if (!(await this.permissions.canRead("product"))) {
      return Result.fail(new NotAuthorizedError());
    }

    const where = { ...params.where };

    // Filter to own records if needed
    if (await this.permissions.onlyOwnRecords("product")) {
      const identity = this.identityContext.getIdentity();
      where.createdBy = identity.id;
    }

    return this.repository.execute({ ...params, where });
  }
}

// Dependencies must include IdentityContext
dependencies: [SmPermissions, IdentityContext, ListRepository];

Important: The list where type must include createdBy?: string. For CMS-based entities, CmsEntryListWhere already has this.

Update Use Case (Edit + Item-Level Check)

class UpdateUseCaseImpl implements UseCaseAbstraction.Interface {
  constructor(
    private permissions: SmPermissions.Interface,
    private getById: GetByIdUseCase.Interface,
    private repository: UpdateRepository.Interface
  ) {}

  async execute(id: string, data: UpdateData): UseCaseAbstraction.Return {
    // 1. Entity-level edit check (no item yet)
    if (!(await this.permissions.canEdit("product"))) {
      return Result.fail(new NotAuthorizedError());
    }

    // 2. Fetch original (enforces canRead + canAccess via GetById)
    const getResult = await this.getById.execute(id);
    if (getResult.isFail()) {
      return getResult;
    }

    const original = getResult.value;

    // 3. Item-level edit check (defense in depth)
    if (!(await this.permissions.canEdit("product", original))) {
      return Result.fail(new NotAuthorizedError());
    }

    // ... events + repository
  }
}

Delete Use Case (CRITICAL: Item-Level Delete)

canDelete with own: true and no item returns false.

Unlike canEdit (which returns true for own: true + no item), canDelete requires the item to verify ownership. The delete use case MUST fetch the item first.

class DeleteUseCaseImpl implements UseCaseAbstraction.Interface {
  async execute(params: Params): UseCaseAbstraction.Return {
    // Fetch first (enforces canRead + canAccess via GetById)
    const getResult = await this.getById.execute(params.id);
    if (getResult.isFail()) {
      return Result.fail(getResult.error);
    }

    const item = getResult.value;

    // Item-level delete check — MUST pass the item
    if (!(await this.permissions.canDelete("product", item))) {
      return Result.fail(new NotAuthorizedError());
    }

    // ... events + repository
  }
}

Publish Use Case (Publish + Ownership)

class PublishUseCaseImpl {
  async execute(params: Params): UseCaseAbstraction.Return {
    // 1. Entity-level publish check
    if (!(await this.permissions.canPublish("product"))) {
      return Result.fail(new NotAuthorizedError());
    }

    // 2. Fetch (enforces ownership via GetById)
    const getResult = await this.getById.execute(params.id);
    if (getResult.isFail()) {
      return getResult;
    }

    // 3. Item-level ownership check (defense in depth)
    if (!(await this.permissions.canAccess("product", getResult.value))) {
      return Result.fail(new NotAuthorizedError());
    }

    // ... events + repository
  }
}

DI Injection

The permissions abstraction is passed directly as a dependency — it IS the DI key:

export const MyUseCase = UseCaseAbstraction.createImplementation({
  implementation: MyUseCaseImpl,
  dependencies: [SmPermissions, OtherDep]
});

Note: Use SmPermissions directly (not SmPermissions.Abstraction). The abstraction returned by createPermissionsAbstraction is the DI key itself.

Gotchas

1. canDelete without item + own: true = false — Always pass the item to canDelete. Fetch first, then check.
2. canEdit without item + own: true = true — Intentional: allows editing new/unsaved records.
3. canAccess without item = true — Only checks entity-level access, not ownership.
4. List where type — Ensure the where interface includes createdBy?: string for own-scope filtering.
5. Dependencies order — DI constructor params must match the dependencies array order exactly.
6. Abstraction is the DI key — Use SmPermissions directly in dependencies, not SmPermissions.Abstraction.

Matching Admin-Side Permissions

The API schema and the admin-side createPermissionSchema should use the same prefix, entity IDs, and action names. This ensures the permissions emitted by the admin UI are correctly evaluated by the API.

API:    createPermissionSchema({ prefix: "sm", entities: [{ id: "product", permission: "sm.product", ... }] })
Admin:  createPermissionSchema({ prefix: "sm", entities: [{ id: "product", permission: "sm.product", ... }] })

See webiny-admin-permissions for the admin-side implementation.

Related Skills

• webiny-admin-permissions — Admin-side permission UI and DI-backed permission checking
• webiny-api-architect — Architecture overview, Services vs UseCases, feature structure
• webiny-use-case-pattern — UseCase implementation, Result handling, decorators
• webiny-dependency-injection — Injectable services catalog