Dev Systems - Building Systems That Scale

Show HN: A productivity app with reminders and nested AI chats

I built this app as a hobby project to experiment with developing a full-stack product from scratch—handling everything from the core utility and vision to the actual implementation. It took me about three months to build, and it was a massive learning experience that has prepared me to tackle my next set of projects.What it does: The app allows you to create documents, whiteboards, and databases integrated with reminders and nested, agentic AI chats.The "Beta" Reality: To be completel

Show HN: AgentTeams – Traceable AI coding workflows

AI coding agents ship code quickly.But in real-world projects, some basic questions remain:* What plan did this change follow? * Was the intent reviewed before execution? * What evidence do we have beyond “it works”? * When something fails, does the lesson get captured structurally?AgentTeams adds a lightweight governance layer on top of AI-driven development.Instead of just marking tasks as “Done”, it creates a traceable execution chain:1. Plan Every task starts as an explicit plan. Prior

Show HN: Vim-Claude-code – Claude CLI integration for AI workflows inside Vim

Hi HN,I built vim-claude-code, a Vim/Neovim plugin that integrates Claude CLI directly into the editor to enable AI-assisted development workflows without leaving Vim.The goal was not to build “chat inside Vim,” but to enhance real workflows developers already use.Current features:Generate and improve Git commit messages from diffsRefactor selected codeGenerate testsSummarize code blocksSend visual selections directly to ClaudeTerminal-based integration (no background daemons)Technically, t

Show HN: OpenKIWI (Knowledge Integration and Workflow Intelligence)

I've always been passionate about AI and automation so when I first heard about OpenClaw I got excited. But as a professional software developer for almost 20 years, and who currently leads a DevOps team I found the experience extremely frustrating: constant gateway restarts and "NO_REPLY" responses from my agents when I would simply ask "Are you there?".So after using it for a bit the TLDR is that while I think OpenClaw and all the other AI driven automation tools like

RalphMAD – Autonomous SDLC Workflows for Claude Code (BMAD and Ralph Loop)

I've been using BMAD (Build More Architect Dreams) for structured AI-assisted development, but found myself copy-pasting workflow configs across projects.Built RalphMAD to solve this: a Claude Code plugin that combines BMAD's structured SDLC workflows with Geoffrey Huntley's Ralph Loop self-referential technique.Key features: - Templatized workflows with runtime placeholder population - Project-agnostic: install once, works with any BMAD-enabled project - Self-running: Claude exec

Show HN: DubTab – Live AI Dubbing in the Browser (Meet/YouTube/Twitch/etc.)

Hi HN — I’m Ethan, a solo developer. I built DubTab because I spend a lot of time in meetings and watching videos in languages I’m not fluent in, and subtitles alone don’t always keep up (especially when the speaker is fast).DubTab is a Chrome/Edge extension that listens to the audio of your current tab and gives you:1.Live translated subtitles (optional bilingual mode) 2.Optional AI dubbing with a natural-sounding voice — so you can follow by listening, not just readingThe goal is simple:

Show HN: IDAssist – AI augmented reverse engineering for IDA Pro

I realize there may be some AI fatigue in the HN community, but I've genuinely seen a marked productivity boost using these tools - hence the desire to share them.With the releases of my GhidrAssist (Ghidra) and BinAssist (Binary Ninja) LLM reverse engineering plugins over the past year, a number of people have reached out to ask "where's the IDA Pro plugin?"Well - as of today, both IDAssist and IDAssistMCP are live on Github!As you'd expect, they all share the same look

Show HN: Kelos – Run Claude —dangerously-skip-permissions on Kubernetes

Kelos is a Kubernetes framework for orchestrating autonomous coding agents. It runs Claude Code, Codex, Gemini, OpenCode, or custom agents safely in isolated, ephemeral pods.The idea is that you define your everyday development workflows as YAML and let them run continuously on Kubernetes. Agent tasks are Kubernetes CRDs, so things like:- Watch for “bug” issues → auto-draft a fix PR- Auto-review incoming pull requests- Auto-triage new issues with labels and priority- Periodically scan the codeba

Show HN: Open-sourced AI Agent runtime (YAML-first)

Been running AI agents in production for a while and kept running into the same issues:controlling what they can do tracking costs debugging failures making it safe for real workloadsSo we built AgentRuntime, the infrastructure layer we wished we had. Not an agent framework, but the platform around agents:policies memory workflows observability cost tracking RAG governanceAgents and policies are defined in YAML, so it's infrastructure-as-code rather than a chatbot builder. Example – agents

Show HN: One Good Thing – one thought a day, then asks you to close the app

I'm a marketer, not an engineer. This is the first iOS app I've shipped.The backstory: I spent three months on research before writing a line of code. Two things had to be true first: the content had to be genuinely different from the wellness space, and the monetization couldn't contradict what the product was trying to do.On content: I read research on decision fatigue, attentional residue, and the paradox of choice. Most "thought of the day" apps are fortune cookies w

Distributed Systems Introduction for Beginners

Distributed systems are a major part of computer science and the concepts around it are essential to building any modern web ...

The Hidden Price Tag: Uncovering Hidden Costs in Cloud Architectures with the AWS Well-Architected Framework

AWS and cloud computing changed how businesses operate. Organizations now store, process, and manage data in the cloud at scale while treating compute resources as a utility. Cloud architecture requires weighing trade-offs to find solutions that fit your specific requirements. Failing to follow best practices in cloud architecture design can lead to undesirable results and hidden costs, such as the cost of security and availability events. The impact of architectural decisions extends beyond tec

Software Architecture Tips I WISH I Knew Sooner

Software architecture is a difficult thing to define, never mind how hard it is to actually do well. I define it as a combination of how ...

Intro to Software Architecture | Overview, Examples, and Diagrams

What is software architecture and do you need to know about it? This video is a simple intro to software architecture where I break ...

FFmpeg at Meta: Media Processing at Scale

FFmpeg is truly a multi-tool for media processing. As an industry-standard tool it supports a wide variety of audio and video codecs and container formats. It can also orchestrate complex chains of filters for media editing and manipulation. For the people who use our apps, FFmpeg plays an important role in enabling new video experiences and improving the reliability of existing ones.Meta executes ffmpeg (the main CLI application) and ffprobe (a utility for obtaining media file properties) binar

Ask HN: Does "task-derived JD and evidence-based candidate" make hiring better?

Hello HN,I’m testing an idea: generate JDs from real engineering tasks, then evaluate candidates against those tasks using code evidence.Instead of writing “5+ years X, Y, Z”, input is actual work context:- GitHub/Jira issues - linked PRs and code diffs - review comments and discussion timeline - change size, dependencies, and failure modesFrom this, the system generates a structured JD, for example:- Problem Scope: what must be solved - Required Skills: APIs, infra, debugging depth, testin

Show HN: Cifer, zero-key custody using threshold cryptography

I built CIFER, a distributed encryption + access-control system designed so that no component ever holds a complete decryption key at rest.Core idea: each “secret” (per user or per dataset) has its own independent post-quantum keypair. There is no master key.Architecture summary:Control plane: verifiable ownership, delegation, revocation, and append-only audit records (tamper-evident authorization history)Custody plane: 5 custody nodes running in TEEs, each storing 1 key fragmentOrchestration: v

Show HN: Write and Run Salt v0.9.2 in the Browser

Hey HN,I wanted to share the new online playground for Salt (https://salt-lang.dev/playground/), a sovereign systems language designed for high-performance, distributed workloads where paying an "abstraction tax" is no longer acceptable.We started building Salt to bridge the gap between the raw power of manual pointer arithmetic and the safety guarantees of modern high-level languages. The architecture relies on an MLIR-based backbone and a Z3-powered "formal s

Show HN: Stash – AI-powered self-hosted bookmark manager

I built Stash, a self-hosted bookmark manager that uses AI to automatically process your links.Paste a URL and it fetches the content, parses it, summarizes it, auto-assigns categories and tags, and generates a vector embedding for search.Search is hybrid — it combines pgvector cosine similarity (semantic) with PostgreSQL tsvector (keyword) and merges both with Reciprocal Rank Fusion. You can search in natural language ("articles about distributed systems tradeoffs") or with simple key

Investing in Infrastructure: Meta’s Renewed Commitment to jemalloc

Meta recognizes the long-term benefits of jemalloc, a high-performance memory allocator, in its software infrastructure.We are renewing focus on jemalloc, aiming to reduce maintenance needs and modernize the codebase while continuing to evolve the allocator to adapt to the latest hardware and workloads.We are committed to continuing to develop jemalloc development with the open source community and welcome contributions and collaborations from the community.Building a software system is a lot li