The Kickbacks extension is a VS Code extension that monetizes IDE 'thinking' spinners in Claude Code and Codex by rendering clickable sponsored ads and sharing up to 50% of ad revenue with developers. It operates as a modular TypeScript application with a complex activation orchestrator managing subsystems for authentication, ad rotation, metrics, earnings, kill switch, consent, self-update, and UI components. The extension uses a local loopback server for secure communication between the extension and injected code in webviews/CLI, implements feature flags via sentinel files, and employs OS-native credential storage. Its architecture centers around adapters for Claude Code (webview and CLI) and Codex (webview), with centralized state management and serving gates controlling ad display based on kill switches, user preferences, and canary states. The code demonstrates strong engineering practices in areas like secure token handling, deduplication, and resilience patterns, though it remains tightly coupled to its specific ad-serving backend and third-party tool integrations.