This repository is the AWS Amplify JavaScript library, a production-grade client SDK for building cloud-connected web and React Native applications. In production, it runs inside end-user apps and mediates access to AWS services: Cognito authentication flows (SRP, OAuth/PKCE, WebAuthn passkeys, token refresh, MFA), S3 storage (multipart uploads, presigned URLs, path-based operations, resumable uploads), AppSync GraphQL/REST APIs, real-time WebSocket subscriptions and events, Pinpoint/Kinesis/Firehose/Personalize analytics, push notifications and in-app messaging, DataStore offline synchronization, Geo, Predictions, Lex, and IoT PubSub. It also ships a Next.js adapter that provides server-side rendering support with per-request cookie-based token storage and auth route handlers for both App Router and Pages Router. Architecturally this is a TypeScript monorepo: a `core` package provides foundational primitives (branded `AmplifyContext`, storage abstractions, HTTP middleware composition, SigV4 signing, retry logic, Hub event bus, cache), while category packages (`auth`, `storage`, `api-graphql`, `api-rest`, `analytics`, `notifications`, `datastore`, `geo`, `pubsub`) implement provider-specific logic behind a common context-first API pattern. The public `aws-amplify` umbrella package re-exports these through subpath exports, with `server` and `internals` entry points for SSR and advanced use. React Native support is provided through native modules for passkeys, push notifications, and web browser sessions. Data flows are typically: configure the Amplify singleton, resolve a context (global or per-request), call a category API, which uses composed HTTP middleware and generated service clients to talk to AWS endpoints, with analytics events buffered and flushed asynchronously. The codebase is actively maintained, with recent commits, extensive CI/CD workflows, changesets, and a large test suite. However, it carries notable transitional debt: Amazon Pinpoint APIs are deprecated with an October 2026 end-of-support, legacy v5 compatibility shims and deprecated key-based storage APIs remain, and some logic is deliberately duplicated across packages (e.g., connection state monitors and event buffers). Despite this, the architecture is coherent, the middleware and context patterns are well-designed, and the SDK is heavily tested across browser, React Native, and server environments.
Certimate is a self-hosted SSL certificate automation tool that manages the full lifecycle of TLS certificates: issuance via ACME protocol, deployment to a vast array of cloud providers (CDN, WAF, load balancers, object storage, hosting panels), and notification via chat bots and email. The system is a single-binary application with an embedded PocketBase backend (SQLite) and a React frontend. The backend is written in a Go-like language and exposes REST APIs for managing certificates, workflows, and settings. The frontend provides a visual workflow designer for creating automation pipelines with nodes for ACME issuance, deployment, upload, monitoring, and notification. Architecture: The application is built around a plugin-style provider architecture. Core interfaces (Deployer, Certmgr, Notifier, ACMEChallenger) are implemented by dozens of providers for different cloud services. A workflow engine executes directed acyclic graphs of nodes, with support for conditions, try/catch, delays, and parallel branches. The system uses PocketBase for persistence, cron-based scheduling, and admin authentication. The UI is built with React, Ant Design, and a flow editor library. Key entry points: main.go (CLI entry), cmd/serve_*.go (server startup), internal/rest/handlers/ (REST endpoints), internal/workflow/engine/ (workflow execution), internal/certacme/ (ACME client), internal/certmgmt/deployers/ (deployment registry), internal/notify/ (notification service). Data flows: User configures access credentials and workflows via UI. Workflows are scheduled via cron and executed by the engine, which calls ACME challengers to issue certificates, then deployers to install them, and notifiers to send alerts. Certificate and workflow state is persisted in PocketBase. External dependencies: PocketBase for storage and admin auth, lego (go-acme) for ACME protocol, dozens of cloud provider SDKs (Alibaba, AWS, Tencent, Huawei, etc.), and various third-party APIs for DNS challenges and deployment. The project also includes trimmed/patched copies of several SDKs to reduce dependency footprint.