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Show HN: Duende: Web UX for guiding Gemini as it improves your source code

https://github.com/alefore/duende
8•afc•5d ago
I wrote a simple web UX in Python/JavaScript that spawns a conversation with Google Gemini with MCP commands that let it work on a specific coding task that you specify: http://github.com/alefore/duende

The UX lets you observe the conversation and provide guidance (e.g. "don't implement Foo through Bar, that's suboptimal; instead …").

It supports a `--review` mode, where once the main conversation says "I'm done with the task", various "evaluation" conversations are spawned, each focusing on reviewing the change from a very specific angle (e.g. "does it introduce useless comments?"). In the future, I'm considering adding other workflows.

I've used it mostly to develop itself (I started with a super rudimentary manual implementation and then mostly used Duende to extend its own implementation) as well as (with moderate success) to add a few new features to [my C++ text editor](http://github.com/alefore/edge).

It's been a lot of fun. I'm still developing my intuitions for what works and what doesn't, but I've already had plenty of experiences where I've been WOW'ed by what LLMs can already accomplish (as well as, to be honest, plenty of very disappointing cases where it struggles significantly on tasks that I expected would have been trivial). It's a learning experience, seeing things like how to avoid hallucinations; developing an intuition for how much to break down large tasks into smaller ones; or knowing when to abort a conversation and restart it with an improved prompt (vs continue to steer it in the right direction).

I think investing up-front in setting up a good context (e.g., good validation logic, useful constant contexts, a good set of "review evaluators" that can push-back against sloppy code) can go a long way to increase the odds of success.

It has changed my perception on the applicability of AI for developing software. While I've reviewed all the outputs (and often rewrite parts of them manually), I'm already incorporating it into (some parts) of my development life-cycle.

I have many ideas for improvements, but figured I'd share this early and ask for feedback. Hopefully others find it interesting; would love to hear your thoughts.

Show HN: Price Per Token – LLM API Pricing Data

https://pricepertoken.com/
278•alexellman•11h ago•117 comments

Show HN: StackSafe, Taming Recursion in Rust Without Stack Overflow

https://fast.github.io/blog/stacksafe-taming-recursion-in-rust-without-stack-overflow/
2•tison•11m ago•0 comments

Show HN: Apple Health MCP Server

https://github.com/neiltron/apple-health-mcp
146•_neil•2d ago•32 comments

Show HN: The Montana MiniComputer

https://mtmc.cs.montana.edu/
93•recursivedoubts•9h ago•20 comments

Show HN: LogMerge – View multiple log files in a merged view

https://github.com/faisal-shah/pylogmerge
3•faisalhackshah•1h ago•0 comments

Show HN: A macOS clock that stays visible when coding or binging in fullscreen

https://cornertime.app/en
44•muvich3n•8h ago•33 comments

Show HN: Nia – MCP server that gives more docs and repos to coding agents

https://www.trynia.ai/
77•jellyotsiro•1d ago•64 comments

Show HN: Tsbro – TypeScript for the browser, no build step

https://github.com/stagas/tsbro
33•stagas•4d ago•26 comments

Show HN: BlackMagic-JS – Automatic dark mode framework that just works

https://github.com/LucAngevare/BlackMagic-js
2•LucAngevare•5h ago•0 comments

Show HN: Autark – A self-contained build system for C/C++

https://autark.dev
3•adamansky•7h ago•0 comments

Show HN: I built a CSV/XLSX editor that uses JavaScript to manipulate data (OSS)

https://www.fileglance.info
2•crossing•7h ago•0 comments

Show HN: Metaessen 2.10 – Manage resources for practical use

https://metaessen.com/
3•lilerjee•8h ago•2 comments

Show HN: Configurable parser from binary message to JSON (and viceversa)

https://gitubo.github.io/bixit/
2•maxmosca•8h ago•0 comments

Show HN: Total Premium Paid on Meme Stocks Calculator

https://wastedonmemes.com/
2•goinggetthem•8h ago•0 comments

Show HN: Narev – Open-Source FinOps for AI and Cloud Spend

https://github.com/narevai/narev
3•osquar•8h ago•2 comments

Show HN: StackDAG: Build and share application stacks as DAGs

https://stackdag.pages.dev/
2•JavRedstone•9h ago•0 comments

Show HN: Easy Python Time Parsing

https://github.com/felixnext/python-time-helper
21•felixnext•4d ago•2 comments

Show HN: A code editor that integrates into the browser

https://tachicode.dev/
41•quintu5•1d ago•8 comments

Show HN: The missing link of a bookstore's tech stack

https://bookhead.net/
93•greenie_beans•2d ago•26 comments

Show HN: TheProtector – Linux Bash script for the paranoid admin on a budget

https://github.com/IHATEGIVINGAUSERNAME/theProtector
161•lotussmellsbad•2d ago•35 comments

Show HN: Tinder but it's only pictures of my wife and I can only swipe right

https://trytender.app/
989•risquer•2d ago•260 comments

Show HN: Compass CNC – Open-source handheld CNC router

https://www.compassrouter.com
172•camchaney•6d ago•44 comments

Show HN: I built a biological network visualization tool

https://nodes.bio
3•jmg421•12h ago•0 comments

Show HN: A word of the day that doesn't suck

80•jsomers•3d ago•32 comments

Show HN: Phind.design – Image editor & design tool powered by 4o / custom models

https://phind.design
88•rushingcreek•3d ago•22 comments

Show HN: MCP server for up-to-date Zig standard library documentation

https://github.com/zig-wasm/zig-mcp
26•afirium•4d ago•9 comments

Show HN: The Magic of Code – book about the wonders and weirdness of computation

https://themagicofcode.com/sample/
109•arbesman•3d ago•29 comments

Show HN: Self-updating MCP server for official pip, uv, poetry and conda docs

https://github.com/KemingHe/python-dependency-manager-companion-mcp-server
29•keminghe•2d ago•18 comments

Show HN: Local Email Client for AI Horseless Carriages

https://github.com/dbish/DispatchMail
14•shahahmed•1d ago•6 comments

Show HN: Lotas – Cursor for RStudio

https://www.lotas.ai/
80•jorgeoguerra•4d ago•28 comments