Letta's Next Phase Fresh

Published: March 16, 2026 | Original Post

---

Letta's pivot toward agent infrastructure focused on memory-first systems.

Core Thesis

Every closed foundation lab today is moving towards developing not just models, but also agents.

Letta Code emerges as the flagship offering -- a model-agnostic agent harness with persistent memory providing frontier agent capabilities including computer use, skills, subagents, and transparent memory systems.

Strategic Improvements

• Memory systems transitioning from specialized database tools to general-purpose computer access via git-backed files (MemFS)
• Sleep-time compute moving to client-side, enabling agents to reflect and improve autonomously
• Agent orchestration expanding beyond messaging to dynamic subagents and skills
• SDK development making systems deployable at scale with memory-first design

Deprecation Timeline

Legacy features being phased out:

Feature	Status
Letta Filesystem	Replaced by actual filesystem access
Legacy memory tools (core_memory_replace)	Deprecated
Templates, hardcoded tool rules	Sunset by mid-April 2026
Server-side MCP integrations	Being phased out

Mission Statement

Letta builds agents that learn. Agents with persistent memory, real computer access, and infrastructure to improve from their own lived experience.