Hacker News: realPubkey

New comment by realPubkey in "Turn your best AI prompts into one-click tools in Chrome"

realPubkey — Wed, 15 Apr 2026 07:29:35 +0000

A big limitation for skills (or agents using browsers) is that the LLM is working against raw html/DOM/pixels. The new WebMCP API solves this: apps register schema-validated tools via navigator.modelContext, so the agent has structured JSON to work with and can be way more reliable.

WebMCP is currently being incubated in W3C [1], so if it lands as a proper browser standard, this becomes a endpoint every website can expose.

I think browser agents/skills+WebMCP might actually be the killer app for local-first apps [2]. Remote APIs need hand-crafted endpoints for every possible agent action. A local DB exposed via WebMCP gives the agent generic operations (query, insert, upsert, delete) it can freely compose multiple steps of read and writes, at zero latency, offline-capable. The agent operates directly on a data model rather than orchestrating UI interactions, which is what makes complex things actually reliable.

For example the user can ask "Archive all emails I haven't opened in 30 days except from these 3 senders" and the agent then locally runs the nosql query and updates.

- [1] https://webmachinelearning.github.io/webmcp/

- [2] https://rxdb.info/webmcp.html

New comment by realPubkey in "WebMCP is available for early preview"

realPubkey — Wed, 04 Mar 2026 14:13:48 +0000

The last days I built the WebMCP plugin for the RxDB database [1]

The goal is to let agents interact with apps through explicit tools instead of DOM scraping or visual navigation. This works nicely because agents can run operations directly on the local-first data the UI already uses.

[1] https://rxdb.info/webmcp.html

Local-Second, Event-Driven Webapps

realPubkey — Fri, 19 Sep 2025 13:00:04 +0000

Article URL: https://softwaremill.com/local-second-event-driven-webapps/

Comments URL: https://news.ycombinator.com/item?id=45301195

Points: 2

# Comments: 0

Unlocking Value on the Private Internet

realPubkey — Fri, 15 Aug 2025 09:36:20 +0000

Article URL: https://julianduru.com/unlocking-value-on-the-private-internet/

Comments URL: https://news.ycombinator.com/item?id=44910305

Points: 1

# Comments: 0

New comment by realPubkey in "Show HN: Offline JavaScript PubSub between browser tabs"

realPubkey — Thu, 03 Apr 2025 17:59:21 +0000

This is likely done with the WebLocks API

New comment by realPubkey in "Ask HN: Small Ideas vs. Big Ideas?"

realPubkey — Mon, 17 Feb 2025 22:27:19 +0000

By buildings small things, you will find ideas for bigger things that people actually need.

New comment by realPubkey in "Server-Sent Events (SSE) Are Underrated"

realPubkey — Wed, 25 Dec 2024 22:18:49 +0000

Yes most servers support websockets. But unfortunately most proxies and firewalls do not, especially in big company networks. Suggesting my users to use SSEs for my database replication stream solved most of their problems. Also setting up a SSE endpoint is like 5 lines of code. WebSockets instead require much more and you also have to do things like pings etc to ensure that it automatically reconnects. SEEs with the JavaScript EventSource API have all you need build in:

https://rxdb.info/articles/websockets-sse-polling-webrtc-web...

New comment by realPubkey in "Misperception of the facial appearance that the opposite-sex desires"

realPubkey — Thu, 05 Dec 2024 07:56:04 +0000

No. The title is the title, not the context. If people do not read the first 5 sentences of the introduction, you cannot help anyway.

New comment by realPubkey in "Lucid dreaming app triples users' awareness in dreams, study finds"

realPubkey — Wed, 20 Nov 2024 07:20:39 +0000

Imagine what you could dream about if you stopped THC.

New comment by realPubkey in "Lucid dreaming app triples users' awareness in dreams, study finds"

realPubkey — Mon, 18 Nov 2024 02:40:47 +0000

You have to quit THC for at least two weeks until you start dreaming again.

New comment by realPubkey in "LocalStorage vs. IndexedDB vs. Cookies vs. OPFS vs. WASM-SQLite"

realPubkey — Tue, 15 Oct 2024 12:10:42 +0000

Wow. This should be fixed. Which browser/OS are you using? Are you in dark mode?

New comment by realPubkey in "There Are Probably Dinosaur Remains on the Moon"

realPubkey — Tue, 03 Sep 2024 23:24:14 +0000

Half-life of DNS bondings is about 10k years.

New comment by realPubkey in "Is Kenya the new Poland for offshore IT?"

realPubkey — Wed, 10 Jul 2024 17:57:50 +0000

Same experience for me but with west africa.

New comment by realPubkey in "How to Check Which JavaScript Runtime Is Running Your Code"

realPubkey — Tue, 11 Jun 2024 13:29:44 +0000

Most of the time you should not even check for the runtime. Instead you should check for the specific feature support that you want to use.

New comment by realPubkey in "SQLSync: A collaborative offline-first wrapper around SQLite"

realPubkey — Mon, 10 Jun 2024 22:32:09 +0000

Looks great. How does it behave on conflicts when 2 offline users write to the same rows and then go online?

New comment by realPubkey in "Recovering electricity from heat storage hits 44% efficiency"

realPubkey — Sat, 25 May 2024 00:32:14 +0000

When they reach lower temperatures like 900C, we could finally replace the inefficent hot water turbines in coal power stations.

New comment by realPubkey in "Texas Attracted California Techies. Now It's Losing Them"

realPubkey — Sat, 27 Apr 2024 14:42:34 +0000

Which books are they banning?

New comment by realPubkey in "We want to know how you learned about Tor and how Tor has helped you"

realPubkey — Mon, 01 Apr 2024 15:12:38 +0000

I use it in production so i can crawl instagram (and others) without paying for proxies. Tor is single threaded so I have 6 docker containers that run tor proxies to get more bandwith out of it. The best thing about tor is that you set it up once and it will work forever for free.

New comment by realPubkey in "A Chronicle reporter went undercover in high school"

realPubkey — Sun, 31 Mar 2024 14:18:57 +0000

Is there any hidden information?

New comment by realPubkey in "A Chronicle reporter went undercover in high school"

realPubkey — Fri, 29 Mar 2024 16:39:51 +0000

These "propaganda" makers will tell you straight into the face. It is upon you to not watch their content or buy their products.