Registering commands without life before main
Rust has no init or pre-main phase, so self-registering commands need another mechanism. Using a distributed slice to get the same shape.
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27 pages
Architecture
What survives a port, and what doesn't
Porting a Go framework to Rust separates design from idiom. Which decisions survived the move, which were habits, and how to tell them apart.
An AI interface that fits on one screen
You do not need LangChain in a command-line tool. A four-method chat interface can hide five providers, tool calling and structured output.
Middleware for CLI commands, not just web servers
Timing, auth, recovery and logging are cross-cutting in a CLI too. Wrapping Cobra commands in web-style middleware rather than PreRun hooks.
A logging interface that doesn't leak its backend
One tool, three logging backends: colour for a terminal, JSON for a container, silence for tests. Depend on the interface, choose the backend once.
Many embedded filesystems, one merged view
Go embed.FS is per-package, so a modular CLI ends up with islands. Merging them into one filesystem, and deep-merging YAML and JSON across them.
Props: the container that does the heavy lifting
Passing dependencies to Go commands in a typed struct rather than stuffing them in context.Context, so the compiler checks them and tests stay simple.
