The MetalBear Blog

Deep dives, how-tos, and field notes on Kubernetes development and AI-driven software engineering. From the MetalBear team, the company behind mirrord.

How to Calculate What Your Slow Kubernetes Dev Loop Is Costing You
Featured Post

How to Calculate What Your Slow Kubernetes Dev Loop Is Costing You

Your Kubernetes dev loop is probably the biggest line item nobody has put a number on. Here's how to calculate it.

Posted July 10, 2026 by Arsh Sharma · 7 min read
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Introducing mirrord up: Shared-Cluster Development in One Command
Introducing mirrord up: Shared-Cluster Development in One Command

One file describes your services, one command runs them all against your shared cluster — and most of the config you used to hand-write …

Jul 9, 2026 · 4 min Read more →
Nitzan from Daylight hacked our vibe-coded minesweeper
Nitzan from Daylight hacked our vibe-coded minesweeper

We vibe coded a Minesweeper game for our mirrord for Windows launch, so naturally it got hacked in like two minutes. At least she sent us a …

Jul 8, 2026 · 3 min Read more →
How We Made mirrord Run Natively on Windows
How We Made mirrord Run Natively on Windows

mirrord was built on Unix, and Windows has no LD_PRELOAD. Here's how we got the mirrord-layer loaded natively on Windows anyway — across the …

Jul 7, 2026 · 8 min Read more →
How Prathyusha Ramanjaneyulu at Celonis Eliminated Dev Environment Overhead for 600 Engineers
How Prathyusha Ramanjaneyulu at Celonis Eliminated Dev Environment Overhead for 600 Engineers

A conversation with Prathyusha Ramanjaneyulu, Senior Software Engineer at Celonis, on how she scaled local development for 600 engineers by …

Jul 1, 2026 · 6 min Read more →
Auto-Verifying Your AI-SRE’s Fixes (Part II): HolmesGPT End-to-End on a Real Cluster
Auto-Verifying Your AI-SRE’s Fixes (Part II): HolmesGPT End-to-End on a Real Cluster

Part II of our AI-SRE series: the verification loop from Part I, running end-to-end against HolmesGPT on a real Kubernetes cluster. Two …

Jun 23, 2026 · 7 min Read more →
Auto-Verifying Your AI-SRE’s Fixes Against Your Real Cluster
Auto-Verifying Your AI-SRE’s Fixes Against Your Real Cluster

When your AI-SRE proposes a fix, you shouldn't have to deploy to staging to know if it works. Here's how to wire mirrord exec into your …

Jun 10, 2026 · 9 min Read more →
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