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Cross-Application Frontend Communication

2 posts · Apr 2026

What this trail covers

This post details the development of Palantir's cross-application communication frameworks, 'Shared State' and 'Commands', designed to enable seamless interaction between different applications (like Gaia and Workshop) using only frontend browser APIs. This approach is crucial for environments with unreliable network connectivity (DDIL). The frameworks allow applications to share state in real-time and invoke imperative actions on each other, extending their utility and enabling new workflows, including integration with AIP agents as tools.

All Palantir trails
  1. Frontend Engineering at Palantir: Building a Backend-less Cross-Application APIThis post introduces two new frontend-only frameworks, 'Shared State' and 'Commands', to enable real-time, client-side communication between Palantir applications. 'Shared State' allows applications to define and synchronize data models across tabs, while 'Commands' enables one application to invoke arbitrary logic in another. These frameworks are designed to function in DDIL environments and are being adopted for direct application-to-application interaction as well as for AIP agents to use as 'tools' to manipulate applications.
  2. Frontend Engineering at Palantir: Building a Backend-less Cross-Application APIThis post introduces two new frontend-only frameworks, 'Shared State' and 'Commands', to enable real-time, client-side communication between Palantir applications. Shared State allows applications to define and synchronize data models across tabs, while Commands enables one application to invoke arbitrary logic (APIs) in another. These frameworks are designed to function in DDIL environments by avoiding backend dependencies and are being adopted for direct application-to-application interaction as well as for AIP agents to use as 'tools' to manipulate applications.