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Achieving Ultra-Fast AI Chat Widgets

https://www.cjroth.com/blog/2026-02-06-chat-widgets
1•thoughtfulchris•2m ago•0 comments

Show HN: Runtime Fence – Kill switch for AI agents

https://github.com/RunTimeAdmin/ai-agent-killswitch
1•ccie14019•4m ago•1 comments

Researchers surprised by the brain benefits of cannabis usage in adults over 40

https://nypost.com/2026/02/07/health/cannabis-may-benefit-aging-brains-study-finds/
1•SirLJ•6m ago•0 comments

Peter Thiel warns the Antichrist, apocalypse linked to the 'end of modernity'

https://fortune.com/2026/02/04/peter-thiel-antichrist-greta-thunberg-end-of-modernity-billionaires/
1•randycupertino•7m ago•1 comments

USS Preble Used Helios Laser to Zap Four Drones in Expanding Testing

https://www.twz.com/sea/uss-preble-used-helios-laser-to-zap-four-drones-in-expanding-testing
2•breve•12m ago•0 comments

Show HN: Animated beach scene, made with CSS

https://ahmed-machine.github.io/beach-scene/
1•ahmedoo•13m ago•0 comments

An update on unredacting select Epstein files – DBC12.pdf liberated

https://neosmart.net/blog/efta00400459-has-been-cracked-dbc12-pdf-liberated/
1•ks2048•13m ago•0 comments

Was going to share my work

1•hiddenarchitect•16m ago•0 comments

Pitchfork: A devilishly good process manager for developers

https://pitchfork.jdx.dev/
1•ahamez•16m ago•0 comments

You Are Here

https://brooker.co.za/blog/2026/02/07/you-are-here.html
3•mltvc•21m ago•0 comments

Why social apps need to become proactive, not reactive

https://www.heyflare.app/blog/from-reactive-to-proactive-how-ai-agents-will-reshape-social-apps
1•JoanMDuarte•21m ago•1 comments

How patient are AI scrapers, anyway? – Random Thoughts

https://lars.ingebrigtsen.no/2026/02/07/how-patient-are-ai-scrapers-anyway/
1•samtrack2019•22m ago•0 comments

Vouch: A contributor trust management system

https://github.com/mitchellh/vouch
2•SchwKatze•22m ago•0 comments

I built a terminal monitoring app and custom firmware for a clock with Claude

https://duggan.ie/posts/i-built-a-terminal-monitoring-app-and-custom-firmware-for-a-desktop-clock...
1•duggan•23m ago•0 comments

Tiny C Compiler

https://bellard.org/tcc/
1•guerrilla•24m ago•0 comments

Y Combinator Founder Organizes 'March for Billionaires'

https://mlq.ai/news/ai-startup-founder-organizes-march-for-billionaires-protest-against-californi...
1•hidden80•25m ago•2 comments

Ask HN: Need feedback on the idea I'm working on

1•Yogender78•25m ago•0 comments

OpenClaw Addresses Security Risks

https://thebiggish.com/news/openclaw-s-security-flaws-expose-enterprise-risk-22-of-deployments-un...
2•vedantnair•26m ago•0 comments

Apple finalizes Gemini / Siri deal

https://www.engadget.com/ai/apple-reportedly-plans-to-reveal-its-gemini-powered-siri-in-february-...
1•vedantnair•26m ago•0 comments

Italy Railways Sabotaged

https://www.bbc.co.uk/news/articles/czr4rx04xjpo
5•vedantnair•26m ago•0 comments

Emacs-tramp-RPC: high-performance TRAMP back end using MsgPack-RPC

https://github.com/ArthurHeymans/emacs-tramp-rpc
1•fanf2•28m ago•0 comments

Nintendo Wii Themed Portfolio

https://akiraux.vercel.app/
2•s4074433•32m ago•2 comments

"There must be something like the opposite of suicide "

https://post.substack.com/p/there-must-be-something-like-the
1•rbanffy•34m ago•0 comments

Ask HN: Why doesn't Netflix add a “Theater Mode” that recreates the worst parts?

2•amichail•35m ago•0 comments

Show HN: Engineering Perception with Combinatorial Memetics

1•alan_sass•41m ago•2 comments

Show HN: Steam Daily – A Wordle-like daily puzzle game for Steam fans

https://steamdaily.xyz
1•itshellboy•43m ago•0 comments

The Anthropic Hive Mind

https://steve-yegge.medium.com/the-anthropic-hive-mind-d01f768f3d7b
1•spenvo•43m ago•0 comments

Just Started Using AmpCode

https://intelligenttools.co/blog/ampcode-multi-agent-production
1•BojanTomic•45m ago•0 comments

LLM as an Engineer vs. a Founder?

1•dm03514•45m ago•0 comments

Crosstalk inside cells helps pathogens evade drugs, study finds

https://phys.org/news/2026-01-crosstalk-cells-pathogens-evade-drugs.html
2•PaulHoule•47m ago•0 comments
Open in hackernews

Ask HN: Are LLMs good for implementing features in existing web apps?

2•endorphine•6mo ago
So I have a typical medium-sized Rails codebase, but with significant code that's not the dead simple CRUD stuff. For example, it talks with third-party APIs, does user authentication, uses Postgres FTS plus some other things.

I'm bored to work on it lately, and I was thinking whether using an LLM I could implement new features for it.

Are any of the current models at this point yet? I guess it should need to have a big context so that it reads all the views/controllers/models.

If so, which tool would you use? Something like Codex or Claude Code?

Comments

saadn92•6mo ago
I recommend Claude Code or Cursor, they’re usually the best right now. If you implement new features, be very specific. The more vague you are, the more it’ll just implement whatever it wants. Be wary, it also ends up breaking stuff sometimes, which can be annoying. But it does pretty well with Rails imo