Fe2O3
A suite of fast, opinionated terminal tools written in Rust. Single static binaries. Shared TUI foundation. No runtime deps.
A suite of fast, opinionated terminal tools written in Rust. Single static binaries. Shared TUI foundation. No runtime deps.
Rust, the language, was actually named after a family of fungi (Pucciniales, plant pathogens "over-engineered for survival," as Graydon Hoare put it). The iron-oxide association came later, through the visual rhyme with what those fungi look like on a leaf. Fe2O3 is that iron oxide: what happens when iron meets oxygen meets time. These tools are the result of pointing fast iron at the soft corners of a workflow. This is the terminal half of that toolkit.
Every tool sits on crust, a small pane-based TUI library. Colors, borders, scrolling, image rendering, and line wrapping all behave identically everywhere.
No Ruby, no Node, no Python. Drop the binary in ~/bin
and it runs. Startup time is under 50 ms on a warm disk.
Every Fe2O3 tool is a feature port of a long-running Ruby original. Same UX, dramatically faster, and with async fetches so the UI never blocks on network I/O.
glow renders images inline using kitty, sixel, w3m, or — as a graphics-free fallback — colored Unicode braille (works over SSH and in tmux without passthrough). PDFs preview as thumbnails, videos as extracted frames, emails as rendered pictures, astronomy as starcharts.
Eleven binaries and five libraries that together cover most of what a keyboard-bound terminal user does in a day.
Interactive shell with tab completion, history search, syntax highlighting, nick/gnick aliases, per-command autocorrect, and OSC 7 for terminal cwd tracking. ~26 ms startup.
Two-pane file manager with syntax-highlighted previews, inline image + video frame rendering, archive browsing, SSH, async file operations, undo, bookmarks, plugins.
Unified terminal inbox for maildir email, RSS, weechat, Slack, Discord, SMS. Thread view, tagging, search, AI assistant, compose plugins, OSC 8 clickable links.
Vim-flavoured modal editor for writers. Soft-wrap, reading mode, spellcheck, persistent registers, Claude Code in the prompt. Native HyperList editing (full hyperlist.vim parity — replaces the retired hyper).
Terminal web browser with vim-style keys, tabs, inline images, forms, bookmarks, and AI summaries. Handles mailto links by handing them off to kastrup.
Day/week/month calendar with ephemeris: sun, moon, planets, astronomical events. Google Calendar + Outlook sync. Desktop notifications. Shared ephemeris engine with nova.
Single amateur-astronomy app: Sky mode (weather, ephemeris, observation conditions, APOD, starcharts) plus Gear mode (telescopes, eyepieces, recommended combinations, observation logs). Replaces nova and scope.
IMDb Top 250 browser with inline posters, TMDb streaming info, wish/dump lists, genre filters, async background fetching. Cut search time so you spend time watching.
Replaces Firefox's removed "Open network login page" banner. Subscribes to NetworkManager via D-Bus and opens a Firefox tab at the gateway IP on captive-portal detection. Pure signal-driven; ~4 MB RSS, 0 % CPU when idle.
Interactive TUI configuration for the rush shell. Browse and modify all rush settings with live color previews, theme cycling, and a full 256-color palette.
TUI color picker with FG/BG slots, R/G/B and H/S/V sliders, hex input, live sample-text preview, and WCAG 2.x contrast ratio. Pure ANSI 24-bit truecolor — no kitty graphics dependency.
Top drainers by CPU%, voluntary-context-switches/s (the
polling proxy), and I/O. Per-workspace attribution via
EWMH, claude-powered analysis pane, persistent baseline,
strace -c on demand, and a pinned summary
for the asm foundation tools.
Five-tab terminal companion for the Amar RPG — a 3-tier d6 system. NPC / encounter / town / weather forge, persistent campaign tracker with adventure import + inline scene images, live combat HUD, browsable canon (187 wiki entries scraped from d6gaming.org), and AI-assisted Inspire prompts.
Terminal Spotify controller. Search, browse playlists and saved tracks, queue items, switch devices, drive playback (play / pause / next / prev / seek / volume / shuffle / repeat). No audio backend — drives Spotify Connect, so playback runs on whatever device the user authorizes (phone, desktop, speaker, web player).
The TUI foundation that every Fe2O3 tool builds on. Panes,
colors, borders, input, scrolling, Unicode, OSC 8 hyperlinks,
diff rendering. Published as fe2o3-crust.
Terminal image renderer supporting kitty, sixel, w3m, and
colored-braille fallback for graphics-free terminals. Auto-detects
the best fit. Used by pointer, kastrup, scroll, watchit, and
astro. Published as fe2o3-glow.
Theme-aware syntax highlighter. ~18 source languages plus
dedicated HyperList, Markdown, LaTeX, and email-mode renderers.
Multi-line block-comment / string state, six built-in themes,
shared theme palette. Used by scribe, pointer, kastrup.
Published as fe2o3-highlight.
Moon phases, sun and planet positions, observation windows.
Shared ephemeris engine used by tock and astro.
Published as fe2o3-orbit.
Archived: nova and scope have been folded into astro; hyper has been folded into scribe.
Each tool ships multi-platform prebuilt binaries on every tagged
release. Pick your platform and drop them in ~/bin:
# Linux x86_64 — one-liner to grab every Fe2O3 binary for app in rush pointer kastrup scribe scroll tock astro watchit torii crush prism drain; do curl -L "https://github.com/isene/$app/releases/latest/download/$app-linux-x86_64" \ -o ~/bin/$app && chmod +x ~/bin/$app done # Other platforms: replace -linux-x86_64 with: # -linux-aarch64 (Raspberry Pi, ARM64 Linux) # -macos-x86_64 (Intel Mac) # -macos-aarch64 (Apple Silicon)
