Ask HN: What are you working on? (September 2026)

Posted by david927 1 day ago

What are you working on? What have you been curious about lately?

288 points | 905 commentspage 27

lvduan 7 hours ago|

I built this sql formatter <https://sql.leuduan.work> for my own use - it works by parsing the SQL query to AST using native engines where possible (for BigQuery it use GoogleSQL library, for MSSQL it uses Microsoft ScriptDOM, the rest uses Apache Data Fusion Parser) and from the AST it re-generates the SQL query in a consistent formatted style. You can throw in all kind of badly formatted SQL queries and it will work just fine. Hope you find it useful!

jorelfermin 19 hours ago||

I have been working on a developer first, read-only first, safety first, Cloud Cost Analyzer. I focus on analyzing cloud infra for waste. It grew out of my time at AWS and then consulting, spelunking through AWS, Azure, (GCP soon) accounts, finding real waste infrastructure. Its primary mode of operation is a rust CLI that you the developer, can run on your workstation, github action, gitlab ci, jenkins, etc and create an actionable report / test that can be used to control costs while maintaining performance and never exposing your credentials, access tokens, etc.

You would be surprised at how many over / suboptimally-provisioned dbs, idle resources, forgotten EBS snapshots, outdated / previous-gen instance types, and vestigial networking that leads to nowhere I find.

If you want to check it out https://cca.dragonfractal.com

faangguyindia 22 hours ago||

Working on a full workout and dieting stack!

17,000+ users already! It's a completely ad free, subscription free product. MacroCodex app, which results in guaranteed weight loss or weight gain outcomes within 2-3 weeks. Many people will start seeing results within the first week. Don't believe? Read the reviews.

MacroCodex is a "Total Calorie Burn of the day" using completely sensorless method explained here: https://macrocodex.app/knowledge/macrocodex/smart-calorie-bu...

CalorieCodex - calorie tracking app which has a Agent Harness built in using BYOK (bring your own key model). How does it help? Using this anyone can track calories and plan their meals. Agent includes skills which help you accurately track calories and plan meals.

Symbiote App - Think "BoostCamp" but completely free, no ads, and fully programmable workout tracker

Example of GZCLP: https://symbiote-studio.macrocodex.app/?builtin=gzclp

gusco 11 hours ago||

https://intestinate.com/gusco/

TUI file manager with Bitwarden/SFTP/S3 support written in go.

Runs pretty much anywhere.

Current feature in the works is built-in audio player.

As someone who still likes to purchase and organize music in files and directories, I couldn't resist the itch to code a worthy competitor to Cubic Player :)

welldoneator 19 hours ago||

I'm working on TableForge[0], it's a browser based, solo or multiplayer, D&D 5e game. In TableForge, the DM is agentic with access to tools strictly following 5e rules. The DM is responsible for narration and reacting to players but your character sheet, inventory, spells are all real server resources you manage. The DM can interact with them through deterministic 5e-based tools (dice rolls, damage, sheet updates, memory). Players can play in real time or async. You can provide the DM a premise (or pick one from the library) and it'll flesh out a full campaign story arc. Either way it's a fresh story arc reacting to your actual decisions, every time.

It’s been really fun working on it and especially rewarding seeing the game bring friends together.

[0] https://tableforge.gg/

nbpname 15 hours ago||

I am working on solving Prompt Injection!

I am building a new kind of LLM runner which lets you understand the internal reasoning process, and which can be automated to intercept hallucinations and prompt injections before they cause more damage.

(No public code yet, but I do intend to open source it)

chilicuil 18 hours ago||

https://saludpass.com one place for allergies, medications, and documents. Share it with any doctor in seconds—with a QR code or a link, data is saved in gdrive, therefore it requires a gmail account, at this moment only in spanish.

okaleniuk 17 hours ago||

I'm working on a highly specialized isosurface extraction algorithm for 3D-printable surface-based lattices.

https://www.linkedin.com/posts/okaleniuk_isosurface-mesh-stl...

The lattice configuration comes from a conventional triangle mesh, so you can prepare it with any STL editor of your choice, and the lattice shape comes from a precalculated Fourier polynomial in barycentric coordinates.

https://okaleniuk.codeberg.page/blackboard/barycentric_fouri...

xkam 17 hours ago||

https://multicoder.dev/

One UI for every coding agent - VS Code extension (GUI) to launch and work with any ACP-compatible agent harness. Supports Claude Code, Codex, OpenCode, Qwen and many others - https://agentclientprotocol.com/get-started/registry . Does not require any new subscription or user ID - this is still handled by the harness, so you can use existing Claude Code or Codex subscription. Multicoder just gives you a high-quality GUI to work with any of them without mental switching cost.

fredwu 15 hours ago|

https://feedbun.com - a browser extension that decodes food labels and recipes on any website for healthy eating, with science-backed research summaries and recommendations.

Been working on Feedbun for a little while, Elixir/Phoenix stack, with bespoke LLM fleets for production workflows. Recently just started using React Native (Expo) for the companion mobile app so I can use it when I shop IRL.

Also started working on a 2D strategy game using Godot engine, still super early days. Been fun to experiment with different LLMs capabilities on game development.

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