# firehose (blogs) — RSS Amplifier Recent posts from the 2 feeds in the RSS Amplifier directory that cover firehose. Page: Feed: --- ## [Generation Got Cheap, Trust Didn’t: A Multi-Agent Trading System with Guardrails and Traceability](https://vkontech.com/multi-agent-trading-guardrails-traceability/?utm_source=rss&utm_medium=rss&utm_campaign=multi-agent-trading-guardrails-traceability) _2026-06-23 · Vasil Kosturski · Vasil Kosturski_ Generation got cheap, trust didn't. How a 4-trader multi-agent system uses output guardrails and per-run audit trails to close the verification gap. The post Generation Got Cheap, Trust Didn’t: A Multi-Agent Trading System with Guardrails and Traceability appeared first on Vasil Kosturski . ## [Moving to Leaflet](https://journal.mackuba.eu/2025/11/17/moving-to-leaflet/) _2025-11-17 · Kuba's Journal_ After about a year here, I’ve decided to migrate this “Journal” miniblog from micro.blog to Leaflet , a new blogging service built on top of Bluesky’s AT Protocol. I wrote about this in my first post on Leaflet here . I’m leaving this site up for now, but I’ve imported all existing posts from here to there, and eventually I’ll add a redirect to the new… ## [Launching Lycan - a search tool for your likes](https://journal.mackuba.eu/2025/10/27/launching-lycan-a-search-tool/) _2025-10-27 · Kuba's Journal_ You know that feeling when you’re trying to find a post (skeet) that you’ve seen some time ago, and you can’t find it? It happens to me all the time. Let’s say someone from the Bluesky dev team wrote some piece of technical detail, or some ATProto developer from the community posted about their project - I know more or less what I’m looking for, but not enough to find… ## [Distributed Tracing Demo with OpenTelemetry and Grafana Cloud](https://vkontech.com/distributed-tracing-demo-with-opentelemetry-and-grafana-cloud/?utm_source=rss&utm_medium=rss&utm_campaign=distributed-tracing-demo-with-opentelemetry-and-grafana-cloud) _2025-07-06 · Vasil Kosturski · Vasil Kosturski_ Discover how to set up end-to-end distributed tracing in a microservices architecture using OpenTelemetry and Grafana Cloud. This hands-on guide walks you through instrumenting Java and Go services, visualizing traces, and gaining deep insights into your system’s behavior. The post Distributed Tracing Demo with OpenTelemetry and Grafana Cloud appeared first on Vasil Kosturski . ## [Skythread updates](https://journal.mackuba.eu/2025/07/02/skythread-updates/) _2025-07-02 · Kuba's Journal_ Since last autumn, I’ve mostly been focused on database and server stuff ( the Postgres migration ) and Ruby coding (e.g. the firehose consumer optimizations . I also have a couple of JavaScript projects, mainly Skythread – I’ve been collecting a todo list of things to fix and add there, but I somehow couldn’t get myself to switch contexts and take a look at that project again.… ## [Firehose go brrr](https://journal.mackuba.eu/2025/06/24/firehose-go-brrr/) _2025-06-24 · Kuba's Journal_ A couple of months ago, I wrote about the tests I’ve done on how I can speed up my code for processing the Bluesky firehose, using my Skyfall Ruby gem. The limits I’ve reached then were around: 4k events/s with full post processing that it normally does (saving all posts, matching posts to feeds etc.) 5k events/s if using Jetstream – but I noted that it seemed suspiciously like that… ## [Speeding up the firehose](https://journal.mackuba.eu/2025/03/18/speeding-up-the-firehose/) _2025-03-18 · Kuba's Journal_ As the final phase of my database experiments , I’ve been playing recently with optimizing the speed of processing in the firehose process. The Bluesky firehose is a streaming API that sends you every single thing happening on the network in real time – every post, like, follow, everything (encoded in a binary format called CBOR ). And my firehose process is a client connecting to that… ## [MacBook Air vs. Pro](https://journal.mackuba.eu/2025/03/06/macbook-air-vs-pro/) _2025-03-06 · Kuba's Journal_ I’m a very picky person when it comes to buying things… especially Apple hardware. I can’t count the number of Apple devices I tried out and sent back, because something wasn’t right. Because there are always tradeoffs, and I don’t like tradeoffs, I want it to be just perfect 😅 So since I really needed a new MacBook (I’ve been using an M1, which would be fine if I… ## [Year 2024 review](https://journal.mackuba.eu/2025/02/10/year-review/) _2025-02-10 · Kuba's Journal_ 2024 was a pretty intense year for me in terms of coding… and a pretty not-intense one for anything else 🫣 I was so completely absorbed with building my Bluesky-related projects. It gives me a lot of satisfaction to be able to work on things which are based on my own ideas and needs, which give me fun problems to solve, let me learn a lot, and which seem to be helping a lot of other people . I… ## [Monitoring Kafka in Kubernetes with Prometheus and Grafana](https://vkontech.com/monitoring-kafka-in-kubernetes-with-prometheus-and-grafana/?utm_source=rss&utm_medium=rss&utm_campaign=monitoring-kafka-in-kubernetes-with-prometheus-and-grafana) _2025-01-24 · Vasil Kosturski · Vasil Kosturski_ This article illustrates monitoring Kafka on Kubernetes using Prometheus and Grafana. We’ll deploy Kafka and Zookeeper, add Kafka Exporter, configure Prometheus to scrape metrics, and set up Grafana dashboards for visualization. The post Monitoring Kafka in Kubernetes with Prometheus and Grafana appeared first on Vasil Kosturski . ## [Ask the crowd: AI or not (Sponsored)](https://crawlproof.com/a/g4XkGE9PvYjZ) _2025-01-24 · **Sponsored**_ Get a transparent verdict from verified humans via web, RSS, or API. ## [Postgress progress](https://journal.mackuba.eu/2025/01/16/postgress-progress/) _2025-01-16 · Kuba's Journal_ I think I’ve finally made some good progress with my Postgres database. Things are working pretty well now, and I still have a few fixes in the queue. It’s not all finished yet, but I feel like I’m coming out of the woods now. For those out of the loop: I have a server which streams and saves all posts from the Bluesky firehose, and uses this data to run several feeds on Bluesky… ## [new domain](https://journal.mackuba.eu/2025/01/08/new-domain/) _2025-01-08 · Kuba's Journal_ who dis ## [test post](https://journal.mackuba.eu/2025/01/08/test-post/) _2025-01-08 · Kuba's Journal_ test 123 ## [Hello world](https://journal.mackuba.eu/2025/01/07/hello-world/) _2025-01-07 · Kuba's Journal_ just setting up my mcroblog ## [Leader Election and Failover with Zookeeper – Case Study](https://vkontech.com/leader-election-and-failover-with-zookeeper-case-study/?utm_source=rss&utm_medium=rss&utm_campaign=leader-election-and-failover-with-zookeeper-case-study) _2024-10-20 · Vasil Kosturski · Vasil Kosturski_ Learn how to implement leader election and failover using Zookeeper, .NET Core, and Docker. This article demonstrates building a distributed system with automatic leader election, handling failures gracefully to ensure high availability and fault tolerance. The post Leader Election and Failover with Zookeeper – Case Study appeared first on Vasil Kosturski .