DuckDB is a high-performance analytical database system. It is designed to be fast, reliable, portable, and easy to use. DuckDB provides a rich SQL dialect with support far beyond basic SQL. DuckDB supports arbitrary and nested correlated subqueries, window functions, collations, complex types (arrays, structs, maps), and several extensions designed to make SQL easier to use.

https://github.com/duckdb/duckdb

LLMs in Production: From language models to successful products - Brousseau Christopher

Author: Sharp Matt
Year: 2025

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Hands-on Linux and PowerShell command reference, written and verified by a senior systems engineer.

https://www.commandinline.com/

Deep Agents is an open source agent harness — an opinionated agent that runs out of the box. Extend, override, or replace any piece.

https://github.com/langchain-ai/deepagents

Ministack: Free, open-source local AWS emulator - 55+ services, Terraform compatible, real databases. Free forever. MIT licensed.

https://ministack.org/

Floci is a free, open-source local AWS emulator for development, testing, and CI.

It gives you AWS-shaped services on your machine without requiring a cloud account, an auth token, or paid feature gates. Point your AWS SDK, CLI, Terraform, CDK, OpenTofu, or test suite at http://localhost:4566 and keep your existing workflows.

https://github.com/floci-io/floci

Things Every Engineer Should Know: SQL Execution Order.

Source

Two ways to keep a user logged in.

And they fail in very different ways.

After login, you need to remember who the user is.

There's typically two common approaches:
• Session token: a random ID. The server stores the session and looks it up each request.
• JWT: a signed token holding the user's info. The server just verifies the signature, no lookup.

JWTs scale well because there's no server-side storage. That's also their weakness.

This is because you can't easily revoke a JWT before it expires. A logged-out user's token still works until it times out. Sessions you can kill instantly.

The solution, which is still not ideal, for JWTs is short expiration and token blacklisting.

Stateless is convenient, but "can't revoke" is a real security tradeoff.

Source

gevent is a coroutine-based Python networking library that uses greenlet to provide a high-level synchronous API on top of the libev or libuv event loop.

https://www.gevent.org/api/gevent.greenlet.html

Redis Pub/Sub vs Kafka

Source

IRIS is a shell auto-completion tool that works like code editor's IntelliSense

Github

The #1 Open-Source CRM

- TypeScript
- Nx
- NestJS, with BullMQ, PostgreSQL, Redis
- React, with Jotai, Linaria and Lingui

https://github.com/twentyhq/twenty