Hacker News

Show HN: TWFF – A container format for declaring AI use in writing

Hacker News - Thu, 02/19/2026 - 3:01pm

TWFF (Tracked Writing File Format) is my proposal for moving away from so called AI detection to verifiable declaration.

Instead of an external model guessing if a text is AI-generated, TWFF is a ZIP-based container (similar to an EPUB) that stores the document alongside a Process Transcript (JSON).

How it works: 1) It captures Revision Velocity: the delta between human drafting and AI injections. 2) It intercepts paste and AI-interaction events, wrapping them in deterministic metadata. 3) It’s local-first. The audit trail stays with the author until they choose to export the signed container.

This is a v0.1 reference implementation built in Python/NiceGUI. I’m looking for feedback on: > The container structure (XHTML vs. Markdown). > The JSON event schema. > The Revision Distance logic: can we create a fingerprint for human effort that is as difficult to fake as the writing itself?

MVP Demo: https://demo.firl.nl/

TWFF spec:https://github.com/Functional-Intelligence-Research-Lab/TWFF...

Comments URL: https://news.ycombinator.com/item?id=47078404

Points: 2

# Comments: 1

Categories: Hacker News

Show HN: Astroworld – A universal N-body gravity engine in Python

Hacker News - Thu, 02/19/2026 - 2:57pm

I’ve been working on a modular N-body simulator in Python called Astroworld. It started as a Solar System visualizer, but I recently refactored it into a general-purpose engine that decouples physical laws from planetary data.Technical Highlights:Symplectic Integration: Uses a Velocity Verlet integrator to maintain long-term energy conservation ($\Delta E/E \approx 10^{-8}$ in stable systems).Agnostic Architecture: It can ingest any system via orbital elements (Keplerian) or state vectors. I've used it to validate the stability of ultra-compact systems like TRAPPIST-1 and long-period perturbations like the Planet 9 hypothesis.Validation: Includes 90+ physical tests, including Mercury’s relativistic precession using Schwarzschild metric corrections.The Planet 9 Experiment:I ran a 10k-year simulation to track the differential signal in the argument of perihelion ($\omega$) for TNOs like Sedna. The result ($\approx 0.002^{\circ}$) was a great sanity check for the engine’s precision, as this effect is secular and requires millions of years to fully manifest.The Stack:NumPy for vectorization, Matplotlib for 2D analysis, and Plotly for interactive 3D trajectories.I'm currently working on a real-time 3D rendering layer. I’d love to get feedback on the integrator’s stability for high-eccentricity orbits or suggestions on implementing more complex gravitational potentials.

Comments URL: https://news.ycombinator.com/item?id=47078360

Points: 1

# Comments: 0

Categories: Hacker News

Choose Optimism (2023)

Hacker News - Thu, 02/19/2026 - 2:57pm

Article URL: https://stephango.com/optimism

Comments URL: https://news.ycombinator.com/item?id=47078347

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: New ads alternative for early SaaS/site owners to sell sponsor slots

Hacker News - Thu, 02/19/2026 - 2:08pm

Hey everyone,

I’ve been noticing a pattern on a lot of indie sites lately: side sponsor slots as an alternative to traditional Google Ads.

It feels like a cleaner way to monetize, especially for products that have meaningful traffic, but lower MRR. It also seems better for users since the ads can be relevant tools/products, instead of random Google spying on you ads.

How it works: it’s a marketplace where site owners can create and sell ad slots, and sponsors can browse and buy those slots. I also added a screenshot of a mockup for how it would look/work.

I’d genuinely love to hear why you would or wouldn’t use it - especially if you fit in the criteria below.

Roughly ideal early users:

SaaS/products with at least ~1,000 monthly users

Any site with a real audience (directory, tool site, content site, etc.)

Comments URL: https://news.ycombinator.com/item?id=47077749

Points: 1

# Comments: 0

Categories: Hacker News

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