THE STACK66 TOOLS

Everything I reach for, in order.

FILTER

01Surface10

request arrives

the interfaces people actually touch

FastAPI

Flask

REST

GraphQL

React

Next.js

Vite

Tailwind CSS

Streamlit

Power Apps

02Orchestration15

decompose and route

planning, tool calls, agent handoffs

Agentic AI

Multi-agent Orchestration

LangGraph

LangChain

Semantic Kernel

AutoGen

Microsoft Agent Framework

LlamaIndex

RAG

MCP servers

A2A

RASA CALM

Dialogflow CX

Copilot Studio

Bot Framework

03Models09

infer

the reasoning, and how it gets steered

Anthropic Claude API

Azure OpenAI

OpenAI API

Gemini API

Hugging Face

Fine-tuning

Prompt engineering

Function calling

Structured outputs

04Retrieval06

ground in real data

vector search and persistence

PostgreSQL (pgvector)

Azure SQL

MySQL

Firebase

Pinecone

FAISS

05Runtime and ops12

deploy, watch, page me

where it runs, and how it stays running

Azure AI Foundry

Azure AI Search

Azure Container Apps

Azure Document Intelligence

Azure Key Vault

AWS Lambda

AWS Bedrock

Docker

Kubernetes

GitHub Actions

Azure DevOps

Model monitoring

06Integrations07

write back out

the systems a build has to plug into

Microsoft Graph API

Dynamics 365

Twilio

WhatsApp Business API

Sumsub

Didit

Azure Communication Services

07Foundation07

underneath all of it

what all of it is written in

Python

C#

JavaScript

TypeScript

Java

SQL

C++