Jack Coleman_

A Rust library for working with Ansible inventories: load any inventory Ansible understands and get typed access to its hosts and their variables.

• 0.3.0 reworked it into idiomatic Rust: a typed error enum instead of panics, a borrowing API, and runnable documentation examples
• Released from CI with crates.io trusted publishing: merging a version bump publishes the crate, with no long-lived API token anywhere

next Inventory groups, then running ad-hoc commands and playbooks from Rust

A Discord bot written to learn async Rust, on tokio with poise and serenity.

• /r6rank gives members the server role for their Rainbow Six Siege rank
• /r6verify looks the rank up instead, through a pluggable RankSource trait (the first provider is Arenyze), with caching and a cooldown to stay inside a free API quota
• Clean shutdown on signals, typed lookup errors, and a public repo with CI

next Always-on hosting, and new commands (reminders, polls)

This site. A small Go program turns site.toml and markdown into static HTML, deployed to Cloudflare Pages: every pull request gets a preview, and merging publishes it.

• Go standard library (html/template, embed) plus goldmark for markdown
• No external requests at all, fonts included, so the content security policy only allows the site itself
• Previously a Go web server on Fly.io; it never needed to be one

next Terminal-style navigation, and writing about how I build things

A Model Context Protocol server that lets an AI assistant such as Claude Code help run a Discord server: look up roles and channels, create and manage roles.

• Built by hand from bytes on stdin: JSON lines, JSON-RPC 2.0, and both MCP protocol versions (the stateless 2026-07-28 and the older initialize handshake)
• Safe by design: its own least-privilege bot, allowlisted servers, a preview before any change, and a reason in Discord's audit log for every action
• Worked through as an offline course: milestones with tests, hints and reference solutions

next Tools, then async with tokio, then a Discord REST client

A party game for phones, in the browser. Each player has a tell, agreed on by the others, and everyone can see every player's tell except their own.

• Join from a short link; no app, no account
• Rust with async on the server; live updates to every phone
• Currently being designed

next A design doc: rooms, join links, live updates to every phone

A study of binary encoding: equity order messages with FIX semantics, in Simple Binary Encoding (SBE), in Go.

• An SBE schema compiled to Go codecs, with every byte of the wire format checked by tests
• Measured against JSON: 2–3× faster to encode and decode, but bigger, because fixed-size fields trade bytes for predictability
• Found that the Go generator's range check rejects SBE's own NUL padding in text fields
• Concluded; a TCP client and server stay ideas