creating-extensions

Creates and edits trusted local Letta Code extensions, including tools, slash commands, local-only model providers, lifecycle/turn events, scoped conversation helpers, panels, status values, and capability-gated behavior. Use when asked to make an extension, add an agent-callable tool, add a slash command, add a local provider/model adapter, transform turns, react to app events, or add lightweight extension UI outside the dedicated /statusline flow.

By letta-ai schedule Updated 6/9/2026