@ScottyBeamIO the hard part is not the website. it is finding the restaurant with no site and calling the owner. AI built the product, the hustle sold it
GRAPH RAG IS NOT OPTIONAL WHEN VECTOR SEARCH STARTS MISSING
this tutorial shows the full build: Neo4j + Python + LangChain. collect data, chunk it, ingest nodes and relationships, embed, retrieve. the pattern from the article in action.
the article explains why: pure vector hits 80% of use cases at 5% of the cost. but when multi-hop questions dominate your queries, vector alone loses entities and relationships. graphRAG indexing costs 10-100x vector, but LazyGraphRAG closes that to roughly 1x.
video shows the how. article shows the when and why. read both
build steps in the video:
- structured data collection and cleaning
- chunking for graph ingestion
- node and relationship extraction
- embedding and hybrid retrieval
Part II: The Body covers this in production
- Tool & Sandbox Engineering: 4 sandbox tiers, egress, MCP broker
- Control Flow & Graph Engineering: LangGraph checkpoints, GraphRAG, hybrid retrieval
- when to use vector vs graph vs both
- build vs buy: Neo4j, Kuzu, LangGraph, Temporal
ANTHROPIC'S "BUILDING EFFECTIVE AGENTS" BLOG POST, NOW IN LANGGRAPH
this guy built every workflow from Anthropic's blog post from scratch. prompt chaining. parallelization. routing. orchestrator-worker. evaluator-optimizer. then the agent loop itself.
the key insight: workflows have predefined code paths. agents remove the scaffolding. 95% of production systems are workflows with LLM nodes, not autonomous agents. because workflows are testable. checkpointable. recoverable.
LangGraph gives you the persistence layer for free: memory, human-in-the-loop, streaming, deployment. that's the infrastructure underneath every pattern in the video.
this is exactly what Part II covers. sandbox tiers for tool execution. control flow graphs for state management. checkpoints to Postgres. replay from failure, not from zero.
article below
"Building Effective Agents" in LangGraph
- workflows vs agents: when to use which
- 5 workflow patterns built from scratch
- persistence, streaming, human-in-the-loop
- the agent loop: tool calling until done