# NullBuilder > Reusable GitHub Actions workflows: tests, nightlies and releases cross-compiled to 12 targets across 5 OS families. Maintainer infrastructure. Part of the Null ecosystem (https://nullmenu.ai) — single-binary Zig tools for running AI agents on your own hardware. All components are pre-1.0 with CalVer releases. Every docs page below has a Markdown twin at the same URL with a .md suffix. ## Start - [Overview](https://builder.nullmenu.ai/docs/start/overview.md): What NullBuilder is, who it serves, and how to wire it into a Zig repo. ## Reference - [Workflows](https://builder.nullmenu.ai/docs/reference/workflows.md): Inputs, permissions and behavior of the three reusable workflows. - [Targets](https://builder.nullmenu.ai/docs/reference/targets.md): Default target matrices, custom matrices, and how Android builds work. ## Optional - [Full docs in one file](https://builder.nullmenu.ai/llms-full.txt) - [GitHub](https://github.com/nullclaw/nullbuilder)