Subagent Persistent Memory - Claude Code
Auto-memory that persists across multiple subagent invocations.
Persistent memory lets a subagent carry state forward between invocations. A researcher agent can remember what it's already looked into; a reviewer can remember your house style.
What it does
Enable persistent memory in the subagent frontmatter and Claude writes summaries to a scoped memory file after each run. On the next invocation, the agent loads those notes before it begins. It's auto-memory, but scoped to the agent identity rather than the project.
When to use it
- Agents that do the same job repeatedly and benefit from recall.
- Multi-session work where you want continuity without copy-pasting context.
- Reviewer or auditor agents that should learn your preferences over time.
- Fan-out patterns where each worker builds on prior runs.
Gotchas
- Memory grows over time. Prune stale entries or it starts to slow down invocations.
- Persistent memory isn't magic - the agent still needs relevant instructions each call.
- Scope matters. Project-scoped memory shouldn't leak personal preferences; user-scoped shouldn't leak project data.
Official docs: https://code.claude.com/docs/en/sub-agents.md#enable-persistent-memory
Technical content at the intersection of AI and development. Building with AI agents, Claude Code, and modern dev tools - then showing you exactly how it works.
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