The Letta platform enables the creation of stateful engineering copilots that utilize structured core memory blocks. These blocks allow agents to maintain persistent context regarding user preferences, project states, and historical lessons, which the agents can update autonomously during interactions.

Developers can implement multi-agent collaboration by sharing memory blocks between different agents. The system supports both read-only policies and writable scratchpads, allowing multiple agents to exchange information and verify tasks, such as code reviews, within a shared persistent environment.

Letta provides capabilities for archival memory, where large volumes of knowledge can be bulk-loaded and retrieved via semantic search. Agents can also be equipped with custom server-side tools to perform deterministic calculations, such as release-risk assessments, and record the outcomes directly into their memory.

The platform includes a streaming interface for monitoring agent reasoning, tool execution, and responses in real time. Conversation history is stored server-side, ensuring that the interaction state persists independently of the local client process and can be reconnected using an agent identifier.