Show HN: Various shape regularization algorithms https://ift.tt/PvGjFtT

Show HN: Various shape regularization algorithms Shape regularization is a technique used in computational geometry to clean up noisy or imprecise geometric data by aligning segments to common orientations and adjusting their positions to create cleaner, more regular shapes. I needed a Python implementation so started with the examples implemented in CGAL then added a couple more for snap and joint regularization and metric regularization. https://ift.tt/D2uExbR January 9, 2026 at 07:43AM

Show HN: CLIs Are All You Need for Agents https://ift.tt/l5Ft7WQ

Show HN: CLIs Are All You Need for Agents Fun agent I've been playing with - the idea is it only has access to a bash tool, and it's directed to create CLIs for use (with additional direction to make the CLIs composable, follow the Unix philosophy, etc). It persists these CLIs and knowledge about them get injected into the system prompt dynamically, so each time it runs it gets access to a larger and larger toolset of composable CLIs. One interesting dynamic that's emerged from this is I've started using these CLIs myself since they're the same interface for the agent or for me, and it's turned into kind of non-chat channel to interact with the agent. One example - I'll add tasks throughout the day myself using the `tasks` CLI it made, then when I interact with the agent it'll run `tasks list` and see everything I've added, or use it to prioritize/update things for me. Later on when I run `tasks list` myself I see all the updates/priorities it set. https://ift.tt/2mQ3FeO January 9, 2026 at 09:42PM

Show HN: macOS menu bar app to track Claude usage in real time https://ift.tt/c6WxGZS

Show HN: macOS menu bar app to track Claude usage in real time I built a macOS menu bar app to track Claude usage in real time via API after hitting limits mid-flow too often. Signed and notarised by Apple. Open source. https://ift.tt/D2Go4jW https://ift.tt/TIxBouC https://ift.tt/D2Go4jW January 8, 2026 at 11:54PM

Show HN: TierHive – Hourly-billed NAT VPS with private /24 subnets https://ift.tt/WjMtgfF

Show HN: TierHive – Hourly-billed NAT VPS with private /24 subnets This idea has been floating in my head for about 10 years. Some of you might remember LowEndSpirit.com back before it became a forum, I started that. I've been obsessed with making tiny, cheap VPS actually useful ever since. TierHive is my attempt to make 128MB VPS great again :) It's a NAT VPS (KVM) platform with true hourly billing. Spin up a server, use it for 3 hours, delete it, pay for 3 hours. No monthly commitments, no minimums beyond a $5 top-up. The tradeoff is NAT (no dedicated IPv4), but I've tried to make that less painful: - Every account gets a /24 private subnet with full DHCP management. - Every server gets auto ssh port forwarding and a few TCP/UDP ports - Built-in HAProxy with Let's Encrypt SSL, load balancing, and auto-failover - WireGuard mesh between locations (Canada, Germany, UK currently) - PXE/iPXE boot support for custom installs - Email relay with DKIM/SPF - Recipe system for one-click deploys Still in alpha. Small team, rough edges, but I've been running my own stuff on it for months. Would love feedback — especially on whether the NAT tradeoff kills it for your use cases, or what's missing. (IPv6 is coming) https://tierhive.com https://tierhive.com/ January 8, 2026 at 11:14PM

Show HN: I visualized the entire history of Citi Bike in the browser https://ift.tt/AvtwZnd

Show HN: I visualized the entire history of Citi Bike in the browser Each moving arrow represents one real bike ride out of 291 million, and if you've ever taken a Citi Bike before, you are included in this massive visualization! You can search for your ride using Cmd + K and your Citi Bike receipt, which should give you the time of your ride and start/end station. Everything is open source: https://ift.tt/BuN74fI Some technical details: - No backend! Processed data is stored in parquet files on a Cloudflare CDN, and queried directly by DuckDB WASM - deck.gl w/ Mapbox for GPU-accelerated rendering of thousands of concurrent animated bikes - Web Workers decode polyline routes and do as much precomputation as possible off the main thread - Since only (start, end) station pairs are provided, routes are generated by querying OSRM for the shortest path between all 2,400+ station pairs https://bikemap.nyc/ January 8, 2026 at 12:27AM

Show HN: Seapie – a Python debugger where breakpoints drop into a REPL https://ift.tt/4mOQzoF

Show HN: Seapie – a Python debugger where breakpoints drop into a REPL https://ift.tt/6dn09D8 January 7, 2026 at 11:28PM

Show HN: Free and local browser tool for designing gear models for 3D printing https://ift.tt/XdVoytL

Show HN: Free and local browser tool for designing gear models for 3D printing Just build a local tool for designing gears that kinda looks and works nice https://ift.tt/N9UYZ2G January 7, 2026 at 02:12PM