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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
546•klaussilveira•10h ago•154 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
872•xnx•15h ago•528 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
78•matheusalmeida•1d ago•16 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
187•isitcontent•10h ago•24 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
190•dmpetrov•10h ago•84 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
10•videotopia•3d ago•0 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
298•vecti•12h ago•133 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
347•aktau•16h ago•169 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
73•quibono•4d ago•16 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
343•ostacke•16h ago•90 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
441•todsacerdoti•18h ago•226 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
16•romes•4d ago•2 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
240•eljojo•12h ago•148 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
44•kmm•4d ago•3 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
378•lstoll•16h ago•256 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
5•helloplanets•4d ago•1 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
222•i5heu•13h ago•168 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
97•SerCe•6h ago•79 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
14•denuoweb•1d ago•2 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
20•gmays•5h ago•3 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
162•limoce•3d ago•83 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
63•phreda4•9h ago•11 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
129•vmatsiiako•15h ago•56 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
40•gfortaine•7h ago•11 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
261•surprisetalk•3d ago•35 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1032•cdrnsf•19h ago•428 comments

Zlob.h 100% POSIX and glibc compatible globbing lib that is faste and better

https://github.com/dmtrKovalenko/zlob
6•neogoose•2h ago•3 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
56•rescrv•17h ago•19 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
85•antves•1d ago•62 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
20•denysonique•6h ago•3 comments
Open in hackernews

Offline-First with CouchDB and PouchDB in 2025

https://neighbourhood.ie/blog/2025/03/26/offline-first-with-couchdb-and-pouchdb-in-2025
68•felideon•9mo ago

Comments

matlin•9mo ago
PouchDB and CouchDB were what inspired me to build Triplit[1]. The idea of having an identical (or merely similar in the case of Pouch/Couch) query engine accessible on client and server is insanely powerful.

The author links to a much longer post on handling conflicts which is worthy of its length because it's not a pleasant experience with this setup.

I highly recommend trying a modern setup from one of the many new local first solutions [2]

1. https://triplit.dev

2. https://www.localfirst.fm/landscape

elcritch•9mo ago
Nice, I’ll have to try out Triplit. There’s also Couchbase which has a local sync database in C++ IIRC.

Also, heads up the first triplit link I tried gave me a 404: https://www.triplit.dev/docs/client/query/select#selecting-r...

matlin•9mo ago
Great catch, fixed!
WorldMaker•9mo ago
Couchbase had a lot of subtle incompatibilities with PouchDB in my attempts to use it on a past project. The big one I recall was that Couchbase had far more restrictions on key names and that required some workarounds.

(Though to be fair Apache has been threatening to shrink the key space greatly as well with the considered move to the Foundation-based "CouchDB 4.0".)

elcritch•9mo ago
Ah good to know. For my use cases I would probably be looking at Couchbase Lite [1] not PouchDB. I’d be more concerned about file attachment sizes and syncing.

1: https://github.com/couchbase/couchbase-lite-C

WorldMaker•9mo ago
That's a related thing I learned from that past project: file attachments are also extremely vulnerable to compatibility issues between CouchDB/PouchDB/Couchbase/Cloudant/etc. Even when they claim to support sizes large enough, they often fail to sync even when small. Attachments in general in the CouchDB protocol are a bottleneck that slows or effectively breaks sync if you have too many to sync at once, because most CouchDB-ish implementations tend to only process a single document at once among other factors.

The project I was working on involved regularly taking some photos and all the sync issues with attachments led to moving to syncing only metadata like width, height, and Blurhashes in the database itself and use a reference URL/pointer to a content-addressed storage (basically an S3 bucket-like with git-like hashes for filenames) we could background sync more directly outside of the CouchDB protocol. (Blurhashes were particularly useful there while waiting on that additional background sync phase after the CouchDB sync.)

justanotheratom•9mo ago
triplit sounds awesome. Any precedence of someone using it from a native iOS app?
matlin•9mo ago
With React Native yes but not yet with Swift. There's been quite a few requests to my surprise through--I figured CloudKit, etc would be sufficient on iOS but I don't have experience there.
justanotheratom•9mo ago
CloudKit not cross platform
4b11b4•9mo ago
How does Triplit compare to InstantDB?
mentalgear•9mo ago
it's fully open-source for once
nezaj•9mo ago
Instant founder here! We're fully open source :)

https://github.com/instantdb/instant

mentalgear•9mo ago
Great to see the founder of Triplit here! PouchDB was definitely ahead of its time, and it’s exciting to see its legacy being carried forward by so many modern local-first (lo-fi) solutions. I’ve also been a longtime fan of Triplit - its API, docs, and overall DX (plus direct community interaction) are excellent.

Also Triplit's universal client/server model means you never have to care about all the complexity of other solutions that require to get the transformations between client db & server db just right. A really impressive piece of work! (another great one with a universal db is jazz.tools, especially if you need encryption)

exe34•9mo ago
Please let's not make lo-fi mean local-first.
felideon•9mo ago
Is Triplit overkill (over PouchDB) if multi-user collaboration is not a use case?
chrismorgan•9mo ago
> Vite, well, it’s in the name. Fast build tooling.

Can someone explain this to me? I’m clearly missing something about its name.

cess11•9mo ago
It can mean 'quickly'.

https://en.wiktionary.org/wiki/vite

jimbobthemighty•9mo ago
CouchDB - is JD Vance a power user?
tty7•9mo ago
I used PouchDB w/ CouchDB as the datastore for a digital wallet. Used to store ZKs for proof of age etc.

Worked a treat

spiffytech•9mo ago
I would love to see a sync solution that didn't want to replace my datastore, or mediate all access to it.

This approach means the tools have to be good at not just sync, but also querying, business logic, validation, authn, authz, trigger background jobs, etc. That's a lot!

I'm not trying to eliminate my backend, nor an all-in-one frontend DB. I've tried tools that do that, and I've come to think the approach has severe limits.

I wonder if there's not a way to offer a two-way stream of data change events, with conflict detection/resolution, which I can process with my own code.

isaachinman•9mo ago
WatermelonDB and Replicache both follow this model.
k__•9mo ago
I had quite the offline-firat déjà vu, when I saw local-first trending the last two years.