LIFE SCAPE launches Kagemusha for AI-controlled signed-in web apps on Mac

LIFE SCAPE, K.K. has released Kagemusha, a macOS app that wraps each website in its own separate Mac window so AI agents can work inside signed-in services without gaining access to other tabs or accounts. The Tokyo company's pitch: safer AI automation for login-based web work, with parallel tasking and support for tools including Claude Code and Codex.

Why it matters: - Kagemusha is designed to let AI agents work inside logged-in business apps without exposing a user's broader browser session. - The approach addresses a common automation trade-off: safer access usually means more setup friction, while browser-wide access can expose every open tab and signed-in account. - Separate app containers also let multiple AI tasks run at the same time.

What happened: - LIFE SCAPE, K.K. released Kagemusha, a macOS application that packages each website as its own standalone Mac app. - The app lets AI agents such as Claude Code operate those apps while the user stays signed in. - The release was announced from Tokyo on Sept. 30, 2026.

The details: - Each service runs in its own browser, with a separate process, a separate login and a separate control endpoint. - An AI agent given access to one app, such as a payments dashboard, cannot reach other services. - AI control can be enabled or disabled for each app. - The control endpoint stays local to the Mac and cannot be reached from the network. - While an AI agent works, the app does not move to the front and other windows stay in place. - LIFE SCAPE measured three page-reading tasks at 10.2 seconds when run one after another and 6.4 seconds when run in parallel. - Kagemusha detects installed AI agents on the Mac and lists them under "AI Integration" in the sidebar. - Selecting "Install" writes the instructions and tools the agent needs to find and connect to the apps. - LIFE SCAPE confirmed the setup works with Claude Code, Codex, agy (Antigravity CLI) and Grok. - The apps also work as ordinary Mac apps. - Kagemusha includes presets for more than 300 web services. - The app supports Chrome Web Store extensions. - Cookies and logins stay separate for each app. - Kagemusha re-synchronizes apps automatically after browser updates. - Kagemusha runs on macOS 12 or later with Chrome or another Chromium-based browser. - The interface is available in 32 languages. - The app is free for up to three apps, including AI control. - Kagemusha Pro costs a one-time $24.99 and removes the app limit. - More information is available at the company’s product page.

Between the lines: - The launch reflects growing demand for AI tools that can handle real work inside authenticated web services without forcing users to hand over full browser control. - By separating each service into its own app and endpoint, LIFE SCAPE is aiming at both security and multitasking, two of the biggest pain points in browser-based automation. - CEO Hisashi Hirajo said he built Kagemusha after a similar tool kept breaking and that he has kept adding features that make AI delegation more practical.

What's next: - LIFE SCAPE said it will keep strengthening how people and AI agents work together. - The company is positioning Kagemusha as a broader platform for routine AI-assisted web work, not just a single-purpose automation tool.

The bottom line: - Kagemusha tries to give AI agents access to signed-in web services without giving them the keys to a user's entire browser.