Articles for people who
ship the stack
Original rewrites on React, Node.js, TypeScript and AI — practical notes from the same engineering practice behind our operator software. Article bodies are in English.
Tagged: fastapi
RAG Document Assistant with Testable Services and Next.js Chat
Split HTTP from pure Python services, index documents, cite segments, and ship a split-panel UI without forking retrieval.
4200 wordsRead articleLineage Investigation Agents on Neo4j and LangGraph
Triage, traverse, profile, hypothesize, verify, and report—tenant-safe FEEDS_INTO walks with MLflow audit and Gradio ops UI.
3878 wordsRead articlePython or TypeScript on the Backend: Choosing by Workload, Not Hype
Compare Python and TypeScript for backend work across typing, performance, async, frameworks, full-stack reuse and AI, and learn how to pick by the project in front of you.
2062 wordsRead articleStreaming LangGraph Agents to React Without Leaking Tool Internals
How to serialize LangGraph astream_events output for Server-Sent Events, redact sensitive tool-call payloads in FastAPI and show friendly tool badges in React.
1102 wordsRead articleBeyond the Chat Box: Architecture of a WhatsApp AI Agent on Google ADK
How a production WhatsApp assistant combines Google ADK specialist agents, RAG, deterministic tools, session state, human handoff and trajectory-based evaluation.
2371 wordsRead articleArchitecting an AI Chat SaaS with Next.js, FastAPI, Credits and SSE
Walk through a full-stack AI chat architecture with a FastAPI gatekeeper, credit ledger, Redis rate limits and SSE streaming, plus the gaps to close first.
3004 wordsRead articleAnatomy of an AI Business Team: Orchestrating Agents with LangGraph and FastAPI
A walkthrough of an open-source multi-agent platform: how Cofounder, Manager and specialist agents are orchestrated, share memory, pause for approval and report.
3766 wordsRead articleEmbedding a LangChain Agent in FastAPI: Tools, Manual Search, Streaming
Build an in-app assistant with FastAPI and LangChain: a PDF manual in ChromaDB exposed as a tool, per-user context, checkpointed history and streamed replies.
6913 wordsRead articleAutomating Transaction Entry in FastAPI with a LangGraph AI Assistant
Learn how to build a LangGraph-orchestrated AI assistant that parses natural language into structured transactions and writes them to a PostgreSQL database via FastAPI.
5736 wordsRead article
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