BrowserSkill Released: Agent CLI That Reuses Logged-In Browser Sessions

BrowserSkill, a CLI tool that enables AI agents to perform web tasks by reusing actual logged-in browser sessions, has been released. The tool shares authentication credentials from the user's open browser but executes agent tasks in a separate 'Agent Window', ensuring that the user's normal work is not disrupted.

Key Features and Architecture

• Session Sharing and Screen Isolation: Utilizes existing browser login sessions as-is, while agents operate in an independent window, allowing users to continue working in other tabs. Direct control of existing tabs requires an explicit borrow/return process.
• Broad Agent Compatibility: Uses a shell-command-based CLI rather than MCP (Model Context Protocol) client connections, enabling integration with any agent harness and framework capable of executing shell commands, such as Claude Code, Cursor, and Codex, without framework dependencies.
• 4-Layer Architecture: Operates in the order of the agent's bsk CLI command -> local daemon (Unix domain socket/Named Pipe) -> browser extension (WebSocket) -> CDP (Chrome DevTools Protocol). The daemon processes tool calls sequentially to prevent conflicts.
• Human-in-the-loop Support: Provides workflows that allow users to intervene directly in situations requiring human input, such as CAPTCHAs or additional logins.

Usage Environment and Limitations

• Supported Environments: Supports macOS (Apple Silicon/Intel), Linux (x64/ARM64), and Windows x64. Only Chrome and Edge browsers are compatible (Firefox is not supported).
• Suitability: Suitable for scenarios requiring agents on sites where login is mandatory, such as internal management screens or SaaS dashboards. Conversely, it is unsuitable for cases requiring clean, one-time browser verification, such as in CI environments.
• License and Security: Available under the MIT License for both personal and commercial use. Operation Audit logs are stored only locally or on remote servers and are not transmitted to the developer.