Strands Agents + MemorySync

Overview

Install strands-memorysync and Strands agents get automatic long-term memory: the MemoryManager consults MemorySyncStore before every model call (real injection — not the tool-gated recall of the official Mem0 strands tool, where a distracted model simply skips memory), and conversation turns persist through the extraction sink with deterministic idempotency seeds. Because MemorySync’s writes are cheap and idempotent, turn-by-turn extraction is safe and recommended — memories are recallable from the first exchange, where zep-strands batches five turns before anything is stored. The lifecycle is crash-proof by design: initialize() deliberately makes no network calls (zep-strands 0.1.0 shipped an event-loop binding crash there), search fails open under a hard 1.2s budget instead of surfacing AggregateMemoryError into application code, and the model-facing tools are search and save only — no delete, so a prompt injection cannot wipe a user’s memories (the official Mem0 tool exposes one). Zero framework dependencies: the store duck-types the MemoryStore Protocol, so it can never version-conflict with your Strands release.

Setup status and requirements

Supported version

strands-memorysync 1.0.0 (PyPI)

Last setup review

2026-08-24

Permissions

A MemorySync API key with read and write scopes.

Limits

Requires a strands-agents release with the MemoryManager seam (2026+, Python 3.10+). The store itself has no framework dependency.

Capabilities

• Automatic injection before every model call — not tool-gated
• Turn-by-turn extraction — first-turn recall works (no 5-turn lag)
• initialize() makes zero network calls — the zep-strands crash cannot happen
• Hard recall budget (default 1.2s); search fails open, never AggregateMemoryError
• Deterministic idempotency seeds — manager retries converge on one row
• No model-facing delete tool — prompt injection cannot destroy data
• Zero framework dependencies — no strands-agents version pin
• sequence_numbers recorded for ordering; tool/system noise never persisted

Quick Start

from strands import Agent
from strands.memory import MemoryManager
from strands_memorysync import MemorySyncStore

store = MemorySyncStore(
    api_key="ms_...",
    user_id="customer-42",
    session_id="support",
)

agent = Agent(
    memory_manager=MemoryManager(stores=[store]),
)
agent("which seat should I book?")

Use Cases

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