Hacker News: hackiku

Show HN: MonteSheet – 100k Monte Carlo runs in ~1.9s in Google Sheets

hackiku — Tue, 21 Jul 2026 15:01:12 +0000

Pushing Svelte and Google Apps Script to the limit.

Built this Monte Carlo simulation suite that clones the spreadsheet's formula graph (using fast-formula-parser) and runs statistical analysis in sidebar V8. No server round trip or data leaks.

What's interesting: uses Vite to bundle the Svelte UI and math into a 1.5Mb Index.html that Sheets sidebar renders. `bun ship` -> refresh sidebar.

Also mulberry32 for reproducible sim runs to "work on my machine."

The math is open source: https://www.npmjs.com/package/@veenie/risk

Try out the addon in GSheets https://workspace.google.com/u/0/marketplace/app/montesheet/...

Would love some feedback from the finance heads among you. Load examples and break 'em apart!

Comments URL: https://news.ycombinator.com/item?id=48993198

Points: 2

# Comments: 0

New comment by hackiku in "Show HN: A simulated computer on Mars with real orbital mechanics"

hackiku — Tue, 14 Apr 2026 15:08:08 +0000

What an thing of immersive beauty. The trash is where it's at - Remember the Cant!

Show HN: Flyable Artemis simulator (Svelte and rk4)

hackiku — Mon, 06 Apr 2026 14:29:49 +0000

Built this 3D sandbox to fly Integrity alongside NASA OEM trajectories. Web workers run rk4 integrator to predict new path (purple) and the engine executes after burn.

Fun bug: fly longer than Moon ephemeris data cutoff May 31st to see some weird zigzag physics

Comments URL: https://news.ycombinator.com/item?id=47661418

Points: 3

# Comments: 0

New comment by hackiku in "Show HN: Venus flight simulator to train LLM pilots (~2% vs. 1985 Soviet data)"

hackiku — Thu, 05 Mar 2026 15:36:33 +0000

Hi HN, I'm a writer turned aero engineer. Obsessed with Venus colonization for years, so I built a simulator to feel what it's like to fly there.

Veenie simulates Venus' atmosphere in the browser within ~2% of VEGA 1985 telemetry. You can also fly HAVOC, EVE, Landis' cloud city and other aerostats.

The fun part: let an LLM fly the balloon. One-click copy a tactical prompt with live telemetry, resource costs, 5-hour trajectory forecast (computed via Web Workers). Teleport below 40km to see ChatGPT panic: https://veenie.space/fly?vehicle=EVE&lat=40&lon=-70&alt=3500...

Endgame: Venus at 50km is 0°C, 1 atm, and full of CO₂/H₂SO₄ (methalox fuel) and deuterium (120-1500x vs. Earth). Atmospheric flight there is a slow-twitch strategic game of thermal management that's perfect for AI agents. I'm presenting this at the Lunar and Planetary Science Conference (LPSC) next week to push for crowdsourced AI training data.

Stack: SvelteKit 5, Threlte/Three.js, Neodrag (draggable avionics), singleton for scrollytelling beats.

Physics: Headless TypeScript engine, Web Workers, 4th-order Runge-Kutta integrator, VIRA atmospheric model, subsystems bus.

The physics engine and Mission Control sandbox (https://veenie.space/lab) are fully open source: https://github.com/hackiku/veenie (go gentle on me, but not into that good night and all)

Show HN: Venus flight simulator to train LLM pilots (~2% vs. 1985 Soviet data)

hackiku — Thu, 05 Mar 2026 15:35:58 +0000

Article URL: https://veenie.space/

Comments URL: https://news.ycombinator.com/item?id=47262839

Points: 2

# Comments: 1