Tag

#langgraph

289 posts3 followers

Explore Hashnode

Alternatives

Carol Dsilva1d ago

I Won $3,000 at a Hackathon by Building 7 AI Agents That Catch Fraud Before It’s Paid

How Team Fire Exit took 2nd place at Vultr Agent Rush with a multi-agent payment fraud investigator

11 min readcaroldsillva.hashnode.dev

Sivanesh S3d ago

From Monoliths to Micro Agents: Skill Based Architectures for the Autonomous Enterprise

Discover how to build enterprise AI agents using modular, skill-based architectures, LangGraph, and the MCP(s) for process automation.

20 min readdodi.hashnode.dev

2

MemorySync2d ago

LangGraph checkpoints turn ZoneInfo datetimes into fixed offsets (DST math off by an hour after resume)

A zone-aware datetime in graph state comes back from the checkpointer with a fixed UTC offset. How to spot it and store times safely.

7 min readmemorysync.hashnode.dev

MemorySync2d ago

LangGraph: fixing 'Checkpointer requires one or more of the following configurable keys: thread_id, checkpoint_ns, checkpoint_id'

A graph compiled with a checkpointer needs a thread_id in config['configurable'] on every call. Here's where it goes, why context= doesn't count, why LangServe drops it, and why None or an empty string is worse than the error.

13 min readmemorysync.hashnode.dev

MemorySync3d ago

LangGraph 'Could not reconstruct builtins.set from checkpoint': why a set of tuples comes back as a list

A set of tuples in LangGraph state comes back from a checkpoint as a list of lists (or None on langgraph-checkpoint 4.2.0). Why the serializer can't rebuild it, and a state shape that round-trips, tested on langgraph 1.2.20.

13 min readmemorysync.hashnode.dev

Sai Kiran Kshatriya6d ago

Run a LangChain Deep Agent on a CockroachDB Virtual Cluster with Durable Checkpoints

A stateful agent that survives a restart, a human-approval pause, and a lost process — because its checkpointer lives in an isolated virtual cluster.

18 min readsaikirankshatriya.hashnode.dev

MemorySyncOct 31

LangGraph SummarizationMiddleware wiped my chat history: keeping the full transcript with PostgresSaver

LangGraph SummarizationMiddleware replaces old messages in checkpointer state. Keep full chat history for your UI with PostgresSaver and a table.

7 min readmemorysync.hashnode.dev

MemorySyncOct 30

DeerFlow per-user memory: issue #1772 is open, but main already isolates memory

DeerFlow issue #1772 asks for per-user memory. It's still open, but current main stores memory per user. How it works and what to check.

5 min readmemorysync.hashnode.dev

Kavya Sree KammariOct 29

The AI agent That Ended Our Friday Night Restaurant Drama

Step-by-step: build a restaurant booking AI agent with LangGraph's ReAct loop, Gemini, and Tavily. Watch it reason, act, and book in real time.

10 min readtechmyway.hashnode.dev

MemorySyncOct 28

LangGraph AsyncPostgresSaver: fixing 'psycopg.OperationalError: the connection is closed' in FastAPI

The checkpointer's connection closes when the async with block exits, but the compiled graph keeps using it. Keep the connection open for the app's lifetime.