Claude Does Not Have One Memory System: A Map of Chat, Claude Code, and the API

Claude Code allows users to define subagents via Markdown files with YAML frontmatter, providing specialized system prompts and tool access. However, issues often arise from description field errors, name collisions, or incorrect tools entries. Separately, Claude lacks a unified memory system. Chat, projects, Claude Code, and the Claude API utilize distinct mechanisms for storing information, meaning context and data are handled differently across these various interfaces and boundaries depending on the specific environment used.