CLAUDE: `webapp/platform/`

Purpose

Shared packages consumed by every Mattermost web experience (Channels, Boards, Playbooks, plugins).
Changes here affect multiple products—coordinate across teams before merging.

Package	Directory	Purpose
`@mattermost/types`	`types/`	TypeScript type definitions
`@mattermost/client`	`client/`	REST and WebSocket API client
`@mattermost/components`	`components/`	Shared React components
`@mattermost/eslint-plugin`	`eslint-plugin/`	Custom ESLint rules

Each subpackage is its own npm workspace with independent package.json, tests, and build scripts.
Run commands with npm run <script> --workspace=@mattermost/<pkg> (e.g., @mattermost/client).
Versioning follows the monorepo; publishable artifacts come from CI pipelines.

Always import using the full package name:

typescript

// CORRECT
import {Client4} from '@mattermost/client';
// INCORRECT - never use relative paths
import Client4 from '../platform/client/src/client4';

Platform packages are automatically built on npm install via postinstall hook. Build order: types → client/components.

Note: When developing in channels, changes in platform packages may need a rebuild if not using a watcher that supports them.

When adding dependencies to platform packages:

bash

npm add package-name --workspace=@mattermost/client