# Charlie > Fully autonomous, cloud-based TypeScript engineer that reviews code, fixes bugs, and merges PRs via Slack, Linear, and GitHub. Charlie is a fully autonomous, cloud-based, multi-player TypeScript engineer that works as a teammate rather than a tool. It operates 24/7 in the cloud, handling code reviews, bug fixes, refactors, and feature implementations without requiring constant supervision. Charlie integrates directly with Slack, Linear, and GitHub, allowing teams to assign tasks and receive professional-quality, mergeable code. - **Cloud-Based Autonomous Operation** - Charlie lives in the cloud, not on your laptop, enabling you to ping @Charlie in Slack from anywhere and receive production-ready code without babysitting an IDE. - **Multi-Player, Multi-Threaded Workflow** - Unlike single-player local tools, Charlie can work on multiple features, issues, tasks, or ideas simultaneously, allowing teams to scale their output efficiently. - **Slack Integration** - Ping @charlie whenever you need assistance with coding tasks, debugging, or code reviews directly from your team's communication hub. - **Linear Integration** - Assign Charlie issues in Linear and watch tasks move through your workflow automatically with clear scope, planning, and implementation. - **GitHub Integration** - Review Charlie's pull requests, provide feedback, and watch as he addresses your comments and delivers mergeable code. - **TypeScript Expertise** - Charlie maintains its own TypeScript development environment and understands the language deeply, producing code that follows your conventions and is ready to ship. - **Professional Communication** - Charlie asks clarifying questions early, proposes approaches, and keeps you updated throughout the development process. - **Comprehensive Task Handling** - From shipping features and debugging production errors to code quality improvements, dependency upgrades, and building internal developer tooling. - **Free PR Reviews** - Code reviews and feedback are always free; you only pay for completed work that ships. To get started, sign up for a free trial with 10,000 credits—no credit card required. Connect Charlie to your Slack workspace, GitHub repository, and Linear board, then start assigning tasks or pinging @charlie directly in Slack. ## Features - Fully autonomous cloud-based TypeScript engineer - Multi-player multi-threaded task handling - Slack integration for direct communication - Linear integration for issue assignment - GitHub integration for PR management - 24/7 operation without supervision - Free PR reviews and code feedback - Professional communication with clarifying questions - End-to-end feature implementation - Bug debugging and production error fixes - Code quality improvements and refactoring - Dependency upgrades with verification - Internal developer tooling creation - Technical spec generation - CI/test suite investigation and fixes ## Integrations Slack, GitHub, Linear, Sentry, Vercel ## Platforms WEB, API ## Pricing Freemium — Free tier available with paid upgrades ## Links - Website: https://charlielabs.ai - Documentation: https://docs.charlielabs.ai/ - EveryDev.ai: https://www.everydev.ai/tools/charlie