What AI engineers are building

Daily AI-engineering signal (mechanical fallback — LLM error: 404 Client Error: Not Found for url: https://api.groq.com/openai/v1/chat/complet)

5 deep dives · 3 builder stories · 15 quick hits · 316 items scanned

agentsevalsMCP/toolslocal/inferenceRAGcoding agentsfine-tuningprompting

Mechanical fallback The LLM was unavailable, so today's brief is auto-assembled from raw rankings.

Deep dives

GitHub

hsj576/virtual-ai-infra-team

An open-source virtual AI Infra team that discovers, benchmarks, and safely upgrades local LLM inference—with independent quality gates, a stable OpenAI-compatible API, and automatic rollback.

Why it matters

Flagged by the ranking heuristics as a real, artifact-backed build.

Try thisOpen the link and skim the repo / paper.

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Show HN: Plainoldanalytics: Analytics Middlware for Go

I built a middleware that gives you posthog-style analytics in go. It is all first-party. It logs every HTTP request, lets you track users, and lets you record screen sessions. The thing uses DuckDB as the underlying data store. All of my side projects are now Golang + SQLite. I wanted an easy way t

Why it matters

Flagged by the ranking heuristics as a real, artifact-backed build.

Try thisOpen the link and skim the repo / paper.

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Show HN: I Built a CLI for Proton Mail, Drive, Calendar, Pass and Contacts

I made a command line tool for Proton. It covers Mail, Drive, Calendar, Pass and Contacts. It is one static binary for Linux, macOS and Windows. Proton doesn't have a CLI for all their web interfaces. There is one for Drive and one for Pass, but the other ones are not really there. There's no Mail C

Why it matters

Flagged by the ranking heuristics as a real, artifact-backed build.

Try thisOpen the link and skim the repo / paper.

View on GitHub↗

HF model

deepseek-ai/DeepSeek-V4.1-Flash

Trending model on Hugging Face — image-text-to-text, transformers; 2324 likes, 288,414 downloads.

Why it matters

Flagged by the ranking heuristics as a real, artifact-backed build.

Try thisOpen the link and skim the repo / paper.

View on Hugging Face↗

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Show HN: Is It Greg?

My friend Greg often posts incredible things he just made, just for fun. Often, I don't realize that it's something HE made and then I see the URL, AND IT'S MY FRIEND, GREG! A few things he made that I think are amazing: - ikea complexity index: https://ikea.greg.technology/ - Boing: https://boing.g

Why it matters

Flagged by the ranking heuristics as a real, artifact-backed build.

Try thisOpen the link and skim the repo / paper.

View on GitHub↗

What people actually built

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Show HN: I built my own knowledge graph from the code AI writes

(no summary)

Steal thisFlagged by keyword heuristics as a first-person build write-up — read the post for the details.

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Show HN: My coding agent apologized for being right, so I built Frank

(no summary)

Steal thisFlagged by keyword heuristics as a first-person build write-up — read the post for the details.

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r/LLMDevs

I didn't want to give AI agents my whole private repo, so I built GHOSTBOUND

I use AI quite a lot when working on private coding projects, but not always in the same role. A workflow I like is using ChatGPT as a planner/reviewer first. It gets the relevant context, looks at the architecture and helps work out what actually needs to change. Then I use a se

Steal thisFlagged by keyword heuristics as a first-person build write-up — read the post for the details.

View on Reddit↗

Quick hits

Show HN: Deeplearning from Scratch in 1400 Lines In my own Programming Language ↗

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Edge0/Edge0-35B-A3B-preview ↗

HF model

openbmb/MiniCPM5-2B ↗

HF model

panda-sandeep/dearagent ↗

GitHub

Email inbox API for AI agents, self-hosted on Cloudflare Workers. Open source, with an MCP server. AgentMail alternative.