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Ask HN: What Are You Working On? (Nov 2025)

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Re: Ask HN: What Are You Working On? (Nov 2025)

#91
I’m building a typed, array-oriented dataflow compiler that takes small declarative schemas and emits plain Ruby and JavaScript, with a C path. It has a mid-end with inlining, common subexpression elimination, constant folding, dead code elimination, loop fusion, and LICM.

Demo to try it out: https://kumi-play-web.fly.dev/

GitHub: https://github.com/amuta/kumi

Re: Ask HN: What Are You Working On? (Nov 2025)

#92
I just launched a 10-Bit Video Thumbnail Provider for Windows.

Windows does not natively support rendering thumbnails for 10-bit videos, which are commonly produced by cameras like the Sony A7IV.

When I started working on a short film the video clips were piling up on my hard drive. Opening them one by one to find what I was looking for was tedious.

I could not find a reputable solution to this problem, so I started a company and built one. I went through the process of EV Certification to have the installer and executable code signed.

I hope to be in the Microsoft Store soon.

I'm also building other utilities with similar purpose.

https://ruptureware.com/thumbprovider

Re: Ask HN: What Are You Working On? (Nov 2025)

#93
A cpp code generator like esphome, to generate the firmware for midi devices in a simple yaml file, for raspberry Pico.

It would have been so much easy just to program the midi hub I wanted to program but wanted to make it generic.. now I can make the firmware for any configuration in seconds!

Re: Ask HN: What Are You Working On? (Nov 2025)

#94
Bread and butter stuff. Pulling together all of the assorted algorithms and data structures I implemented in C over the years out of necessity - lists, trees, stacks, queues, hash tables, memory pools, etc. - aligning the APIs, cleaning up and merging into a library. It's a background project but super fun. This and several parsers - JSON, some config file formats, and parsers for some GPS / GNSS receiver data protocols. FSMs also always feel like nice, clean fun. And prematurely optimising every bit.

Re: Ask HN: What Are You Working On? (Nov 2025)

#95

Currently working on a take on Pokémon GO + Pokémon Snap but for birding. The goal is to explore your neighborhood, find birds, take good photos of them all. Next month, I'll be doing an event to find a rare bird, excited to see how it goes! It's still a small closed alpha, if anyone is interested: https://testers.birdlego.com Here is a rough trailer of it: https://www.youtube.com/watch?v=yVpR8aafFjI

I would pay for this. 100%.

Re: Ask HN: What Are You Working On? (Nov 2025)

#96

Currently working on a take on Pokémon GO + Pokémon Snap but for birding. The goal is to explore your neighborhood, find birds, take good photos of them all. Next month, I'll be doing an event to find a rare bird, excited to see how it goes! It's still a small closed alpha, if anyone is interested: https://testers.birdlego.com Here is a rough trailer of it: https://www.youtube.com/watch?v=yVpR8aafFjI

What a good idea, sounds fun!

Re: Ask HN: What Are You Working On? (Nov 2025)

#97
Here’s mine:

I’m building a small live NFL game-prediction tracker and writing up what I learn as I go:

https://michellepellon.com/portfolio/nfl-game-predictions

# What’s under the hood today

ELO translated to the NFL with margin-of-victory adjustments, a modest home-field term, and week-to-week recency weighting.

Post-hoc calibration with isotonic regression so 70% predictions land near 0.70 empirically.

Monte Carlo to roll games forward for distributions on weekly win odds and season outcomes, plus basic reliability/Brier/log-loss tracking.

# Where I’m taking it (ensemble ideas)

Blend a few complementary signals: (1) pure ELO strength; (2) schedule-adjusted EPA/Success Rate features; (3) injury/QB continuity and rest/travel effects; (4) a small “market prior” from closing lines; (5) weather/play style pace features.

Combine via a simple stacked model (regularized logistic, isotonic on top), or a Bayesian hierarchical model that lets team effects evolve with partial pooling.

Separate models for win prob vs. expected margin, then reconcile with a consistent link so the two don’t disagree.

Emphasis on calibration over leaderboard-chasing: reliability diagrams, ECE, PIT histograms, and backtests that penalize regime drift.

# Why I’m doing it

It’s a sandbox to teach myself Monte Carlo and ELO end-to-end—data ingest → feature plumbing → simulation → calibration → eval—on a domain with immediate feedback every week.

# How this connects to my day job (healthcare ops)

I work at BlueSprig, running ~150 ABA therapy clinics. I’m exploring whether ELO-like ideas can augment ops decisions:

“Strength” ratings for clinics, care teams, or scheduling templates based on outcome deltas and throughput (margin-of-victory ≈ effect size/efficiency).

Opponent/schedule ≈ case-mix, payer mix, staffing constraints, geography.

Monte Carlo for expansion planning (new-site ramp curves), capacity/OT forecasting, and risk-adjusted outcome monitoring with calibration so probabilities mean something.

Guardrails for fairness and interpretability so ratings don’t become blunt scorecards.

# Help

If you’ve shipped calibrated ensembles in sports or have pointers on applying rating systems to multi-site healthcare operations, I’d love to trade notes or if you need someone to this and other kind of work for their dayjob email me at mgracepellon@gmail.com -- I would love to do this fulltime.

Re: Ask HN: What Are You Working On? (Nov 2025)

#98
I'm working on a Yelp alternative called Vibehuntr -- just something different to browse venues using Google's API, with a social layer so I can see what my friends like. It's very rough around the edges right now and it might be completely different by next week. It's been a fun experiment in vibe coding on a full stack. https://vibehuntr.io

Re: Ask HN: What Are You Working On? (Nov 2025)

#99
https://limereader.com/

A time-sorted list of top posts from Hacker News, Tildes, Lobsters, Slashdot, Bear, and some science, tech & programming related subreddits.

Posts on STEAMD topics (Science, Technology, Engineering, Arts, Math, and Design).

My site went live 2 days ago. I shared more details on below post but for some reason, my post was shadow banned and didn't show up on Show HN.

https://news.ycombinator.com/item?id=45849924

Any constructive feedback is welcome!

Note that I am trying to narrow down a bug in my backend which sometimes causes it to crash. Since backend is built in Swift using SQLite as database, it's a bit hard to nail down the issue.

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