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The Engineer's Alpha

An Engineering Lead's journey to $10k/mo passive income. Deep dives into Tech Stocks, Side Projects, and Engineering Systems.

Latest posts

SELinux Multi-SoC Policy Architecture: From Pitfalls to Design Contracts

When an Android platform supports multiple chipsets, the layered design of SELinux policy determines the ceiling of maintenance cost. This post walks through the three-layer protection model, common directory layout traps, and how to govern cross-SoC sepolicy with contracts instead of folders.
Running AOSP Module Builds on Mac with Apple Container + Rosetta

macOS 26 shipped Apple Container. I tried using it to run AOSP module builds locally on a MacBook to speed up development iteration. This post covers the setup, three compatibility issues I hit, and performance data with persistent cache.
Claude Code Skill Safety: From 'Please Stop' to 'You Can't Move'

38 Skills, three layers of defense, one hard lesson: natural language instructions are not a safety mechanism. How I systematically hardened 12 unprotected destructive Skills with PreToolUse Hooks, Skill splitting, and disallowed-tools.
Safety Gates in Claude Code Skills: From Auditing 35 Skills to a Three-Layer Protection Model

I assumed writing 'Use AskUserQuestion' in a Skill was a hard constraint. After auditing 35 Skills, reading the official docs, and digging through GitHub Issues, I found out: the model uses the same mechanism to decide whether to obey your CHECKPOINT and whether to invoke your tool. There's only one gate that's truly 100%.
Git as an External Brain for Claude Code: Beyond MEMORY.md

MEMORY.md isn't the end of the road for AI Agent memory. When project scale exceeds what a context window can hold, Git becomes the truly scalable external memory. This post breaks down the three layers of memory, Git's role among them, and which practices have research backing vs. which are just my own experiments.

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