Project Dropstone: a Neuro-Symbolic Runtime for Long-Horizon Engineering [pdf]

Posted11 days agoActive10 days ago

epicprogrammer

21 points

2 comments

archive.blankline.orgResearchstory

informativeneutral

Debate

20/100

Artificial IntelligenceNeuro-Symbolic AIEngineer Expectations

Key topics

Artificial Intelligence

Neuro-Symbolic AI

Engineer Expectations

Found this on an open directory (blankline.org).

It describes a 'Recursive Swarm' architecture designed to solve context saturation for 24+ hour engineering tasks.

Two key claims stood out to me:

D3 Engine: Separates 'Active Workspace' from 'Latent History' to reduce compute costs by 99% (uses 'Trajectory Vectors' instead of token caching).

Horizon Mode: Uses a swarm of 10,000 agents to explore solution paths instead of linear prediction.

The 'Horizon Mode' paper is also in the same directory: https://archive.blankline.org/api/media/file/horizon_mode_pu...

Curious if anyone has seen the 'Flash-Gated Consensus' protocol used in production before?

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01Story posted
Dec 24, 2025 at 9:47 PM EST
11 days ago
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02First comment
Dec 25, 2025 at 10:04 AM EST
12h after posting
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3 comments in 16-17h
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04Latest activity
Dec 25, 2025 at 2:03 PM EST
10 days ago
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Discussion (2 comments)

Showing 8 comments

glerk

10 days ago

1 reply

I downloaded it to try and bought a "pro" subscription ($15 for 750 requests, no idea what counts as a "request"). The app is a vscode fork similar to cursor. I entered one prompt which was a simple "plan a way to architect this moderately complex thing within my code". The agent went on thinking for 5 minutes or so with no indication of progress, then it told me it blew past my 750 requests allowance and threw an error. Yeah... ok.

epicprogrammerAuthor

10 days ago

I am incredibly sorry about that. It sounds like the agent hit an infinite reasoning loop and burned your credits—that is a critical failure on our end. I want to fix this personally. Please email me at tom@blankline.org (or just reply here if you prefer). I will refund your $15 immediately.

I'm adding free credits to your account so you can test the D3 update when it drops tomorrow (which patches this loop).

We clearly have work to do on the beta fail-safes.

yorwba

10 days ago

1 reply

So last month you asked for feedback on the D2 Engine https://news.ycombinator.com/item?id=45886319 and now you 'found' the D3 Engine in an open directory...

epicprogrammerAuthor

10 days ago

You got me. Yes, I am part of the Blankline team.

To clarify the confusion: D2 is the beta engine currently on our website. D3 is the new architecture in these papers. We developed D3 specifically to solve the context limits we hit with D2.

I posted these papers 'anonymously' because I wanted to see if the D3 research (specifically the Trajectory Vectors) stood on its own merit without the bias of a 'Show HN' launch. That was a mistake, and I apologize for the cloak and dagger.

The good news: We are officially releasing the D3 update tomorrow, as per our internal schedule. The papers were just the pre-read. You'll be able to test the 'Flash-Gated Consensus' yourself in 24 hours.

bigyabai

10 days ago

1 reply

Please disclose your affiliation with the project before submitting it. You did not simply "find" it, anyone can click into your submission history and surmise:

https://news.ycombinator.com/item?id=45886320

epicprogrammerAuthor

10 days ago

You are absolutely right. I addressed this in the thread above, but to be clear: Yes, I am part of the team. I shouldn't have tried to frame it as a 'discovery'. Apologies.

01HNNWZ0MV43FF

10 days ago

> a architecture

They should invent a grammar check AI

ACCount37

10 days ago

Does this actually do anything except make loud claims?

If I had a dollar for every "revolutionary new AI architecture that will change everything forever", I'd be able to buy a GB200 NVL72 with that.

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ID: 46381620Type: storyLast synced: 12/25/2025, 5:35:19 PM

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