shane's blog Notes on software, tools, and building things. https://shanemarusczak.github.io/blog/ 2026-08-13T00:00:00Z Shane Marusczak Cutting a Chess Pawn From Five Hours to Two https://shanemarusczak.github.io/blog/posts/2026-08-13-cutting-a-chess-pawn-from-five-hours-to-two.html 2026-08-13T00:00:00Z 2026-08-13T00:00:00Z Cutting a 4-axis CNC chess pawn's machine time from five hours to about two on an entry-level rotary machine: right-sizing the finishing tool, scoping the toolpath, and why an even faster finish wasn't worth keeping. Instrument First: Ben Eater's 6502 on Breadboards https://shanemarusczak.github.io/blog/posts/2026-07-27-instrument-first-ben-eaters-6502.html 2026-07-27T00:00:00Z 2026-07-27T00:00:00Z Notes and photos from building Ben Eater's 6502 breadboard computer: the parts, the memory map, the wire colors, and the bus monitor and single-step clock that went in before any of the computer itself. How I Build Software with AI, According to My Transcripts https://shanemarusczak.github.io/blog/posts/2026-07-22-how-i-build-software-with-ai.html 2026-07-22T00:00:00Z 2026-07-22T00:00:00Z Mining ~700 of my own prompts from nine Claude Code sessions across four Rust projects to find the workflow I actually use: prime with context, plan twice, delegate in numbered batches, review with fresh eyes, and keep the hands-on testing for yourself. Three Threads from Onboarding a CNC https://shanemarusczak.github.io/blog/posts/2026-04-29-three-threads-from-onboarding-a-cnc.html 2026-04-29T00:00:00Z 2026-04-29T00:00:00Z Three threads pulled from onboarding a desktop CNC: chipquake (fracture mechanics through self-organized criticality), the substrate boundary (why community knowledge architecture depends on moderation), and the long bet (machining as cognitive grounding). What 30+ Gandalf Challenges Taught Me About Prompt Injection https://shanemarusczak.github.io/blog/posts/2026-02-23-gandalf-prompt-injection-taxonomy.html 2026-02-23T00:00:00Z 2026-02-23T00:00:00Z A taxonomy of prompt injection attack patterns derived from 30+ Gandalf Agent Breaker challenges, organized by attack surface rather than challenge name. Building a Blog Post Skill for Claude https://shanemarusczak.github.io/blog/posts/2026-02-23-building-a-blog-post-skill-for-claude.html 2026-02-23T00:00:00Z 2026-02-23T00:00:00Z How to build a custom Claude skill that turns conversations into structured dev blog posts using an expanded STAR framework.