Apps & aerospace • ran bitcoin.org, led teams at Coinbase • editor of Mastering Bitcoin & Mastering Ethereum • building money machines & forever systems
Hey HN, I built Claude Extender because I wanted a way to run multiple instances of Claude Code (e.g. agents). The core idea: agents are markdown files. The YAML frontmatter defines schedule, tools, cost limits, and notifications. The markdown body is the instruction Claude follows. A daemon runs in the background, spawning claude -p when agents are due.
There are three execution modes:
* Scheduled, cron-based. For example, my daily email triage runs at 6 AM, processes ~50 emails, archives the noise, and sends me a Telegram summary before I wake up.
* Watcher, event-driven. A cheap check script (JS/Python) polls for changes. Only triggers Claude when something actually happened.
* Persistent, long-running sessions with heartbeats, checkpoints, and restart policies.
Tools use MCP (Model Context Protocol) servers that you write and control. No plugin marketplace, no third-party code touching your credentials. Cost tracking is first-class. Every run logs its cost in USD. Per-run limits, daily budgets, monthly caps. The daemon pauses everything if you hit your budget. This matters when agents run unsupervised.
Everything is plain text, agent definitions, run logs, memory, cost ledgers. git diff your agents, grep your run history. I'm currently running this on a $5/mo Hetzner VPS.
Requirements: Node.js 20+ and the Claude Code CLI.
Anyhow, hope it's helpful and happy to answer any questions.
Debatable but IMO Lightning is still nascent even to this day. There is no real large ecosystem of interactive web applications available in-browser that you can build 402 offerings on top of. The EVM is light years ahead.
I'm by no means against Lightning, it's just got a long road of ecosystem, development and better UX ahead of it before we see general mainstream adoption. At the moment, bitcoin's killer feature is holding bitcoin. Most people don't know what Sats are. There are few bitcoin-payable apps. Few stable assets that remove volatility for every day payments like you would need with 402. Stuff like that.
Transactions confirm every 2 seconds on Base, and preconfirm even faster (every 200ms); there's no lag from a peer to peer payments perspective since they settle so quickly.
Through account abstraction and spend permissions, you also don't have to wait and authorize every single payment. It's a customizable from a developer perspective depending on how they want to build out their application.
It's really difficult to build agentic applications on top of Bitcoin. It's generally possible throughout the EVM however, which is many networks, not just Base. Base won't be the only EVM-compatible network that x402 utilizes.
Hi all, I built this browser extension as someone who reads HN daily but doesn't post much. I want to be more active and thought this would be a fun weekend side project. Would appreciate any feedback. Particularly interested in hearing about HN pain points this could be improved to address.
This extension is inspired by the 'post to HN' bookmarklet and does three main things...
1. Smart title optimization: automatically removes site names, converts "10 Ways to Build X" to "How to Build X", and follows HN's title guidelines / recommendations for best practices
2. Duplicate detection: scans 1000+ recent HN stories to find existing submissions (links to the most upvoted, canonical version if found)
3. Built-in HN guidelines: helps people like me who want to contribute, be mindful of doing it the right way
It's pure vanilla JavaScript with no external dependencies, uses HN's official Firebase API for duplicate checking, and only requests activeTab permission. Works on Chrome, Firefox, Edge, and Brave.
It's open source (MIT license) and privacy-first and the only data it accesses is your current tab's URL and title when you explicitly use it:
https://github.com/wbnns/submit-to-hacker-news
You can install it by downloading from GitHub and loading the appropriate folder into your browser's developer mode. No accounts or setup required.