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#013 · · 10:16 AI agentsai coding agentsbuild a terminalc programmingclaude codecmuxcodexelbcastsghostlingghosttyjeditermjetbrainskitty keyboard protocollibghosttylibghostty-vtmitchell hashimotoneovimopencodeprogramming tutorialscreencastsdl2supacodeterminal emulatorxterm.jszigzig build

libghostty: Why Agent Tools Build on Ghostty (and I Build a Terminal)

What libghostty is, who really uses it (and who doesn't), and a working terminal window on libghostty-vt in about 180 lines of C.

Prerequisites: a little C; to build along: Zig 0.17, SDL2 and SDL2_ttf

Not covered: GPU rendering, font fallback, the key encoder, the full libghostty that cmux embeds

Source: https://github.com/webmatze/libghostty-terminal

The terminal from this episode (one C file, Ghostty pinned to c27ef4c): https://github.com/webmatze/libghostty-terminal
Ghostling, the official minimal libghostty terminal: https://github.com/ghostty-org/ghostling

Sources, as of 2026-10-28:
- Libghostty Is Coming (Mitchell Hashimoto, 2025-09-22): https://mitchellh.com/writing/libghostty-is-coming
- Ghostty README on libghostty: https://github.com/ghostty-org/ghostty#cross-platform-libghostty-for-embeddable-terminals
- JetBrains: The Terminal in JetBrains IDEs Now Runs on libghostty: https://blog.jetbrains.com/platform/2026/10/jetbrains-terminal-now-uses-ghostty/
- Mitchell on Hacker News (memory, 10,000 terminals, Neovim, 1.0): https://news.ycombinator.com/item?id=50262760
- Neovim PR #39773: https://github.com/neovim/neovim/pull/39773
- cmux: https://github.com/manaflow-ai/cmux
- Supacode: https://github.com/supabitapp/supacode
- Calyx: https://github.com/yuuichieguchi/Calyx
- awesome-libghostty: https://github.com/Uzaaft/awesome-libghostty
- OpenCode (ghostty-web in the app, libghostty-vt in the process daemon): https://github.com/anomalyco/opencode

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All episodes 13 episodes

10:16 NOW PLAYING
#0135 Nov 2026AI agents · ai coding agents · build a terminal · c programming · claude code · cmux · codex · elbcasts · ghostling · ghostty · jediterm · jetbrains · kitty keyboard protocol · libghostty · libghostty-vt · mitchell hashimoto · neovim · opencode · programming tutorial · screencast · sdl2 · supacode · terminal emulator · xterm.js · zig · zig build

libghostty: Why Agent Tools Build on Ghostty (and I Build a Terminal)

What libghostty is, who really uses it (and who doesn't), and a working terminal window on libghostty-vt in about 180 lines of C.
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#01026 Oct 2026AI agents · Open source coding stack vs Claude Code · ai coding agents · claude code · elbcasts · open source ai · open weights · opencode · openrouter · programming tutorial · reflection beam · ruby on rails · screencast

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#00815 Oct 2026AI agents · ai coding agents · claude code · codex · elbcasts · git worktree · multi-agent · openmausbot · programming tutorial · ruby on rails · screencast · Chief of Staff · parallel AI agents · claude code tutorial · codex cli · ai pair programming · tdd with ai · rails 8 · OpenMausBot · MausBot

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#00714 Oct 2026OpenMausBot AI bots · ai agents · ai bots · claude code · elbcasts · grok bot alternative · local ai · multi-agent · open source · openmausbot · programming tutorial · screencast

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#00613 Oct 2026AI for developers · Risk decisions with a local model · active job · decision thresholds · elbcasts · fraud detection · human in the loop · laya · local ai · programming tutorial · rails · screencast · turbo streams

I set my AI fraud threshold to 0.98. It paid out nothing

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#0056 Oct 2026AI for developers · Measuring decision models · elbcasts · github issues · jev · laya · llm evaluation · local ai · programming tutorial · python · ruby · screencast · typesafe ai

Don't trust the model card: three decision models on real data

After this episode the viewer can measure any classification model on their own labelled data in twenty lines, and use the probability to decide what runs without a human.
4:16
#0041 Oct 2026Rails Turbo Streams · Ruby on Rails · action cable · broadcasts_to · elbcasts · hotwire · programming tutorial · rails · rails 8 · realtime · screencast · solid cable · turbo streams

Rails Turbo Streams from a Background Job (No JavaScript)

After this episode the viewer can push a change from a background job straight into an open page with Turbo Streams and Solid Cable, and knows why the async adapter never works...
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#00326 Sep 2026Rails Background Jobs with Solid Queue · Ruby on Rails · active job · background jobs · elbcasts · perform_later · programming tutorial · rails · rails 8 · retry_on · screencast · solid queue · sqlite

Your form waits three seconds — move it to a job (Solid Queue)

After this episode the viewer can move slow work out of the request into an Active Job, run it with Solid Queue in development, and know where jobs get lost.
5:11
#00223 Sep 2026Rails Form Objects · Ruby on Rails · activemodel · elbcasts · form objects · programming tutorial · rails · rails 8 · rails forms · refactoring · screencast · strong parameters · thin controller

Stop Fat Controllers: Rails Form Objects Explained

After this episode the viewer can build a form that spans two models with a plain Ruby form object, keep validations in one place, and keep the controller thin.
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#00121 Sep 2026rails uniqueness validation · validates uniqueness rails · rails normalizes · rails unique index · rails duplicate records · rails race condition · activerecord validations · rails model validations · rails form errors · postgres unique index · postgresql constraints · data integrity · rails 8 · activerecord · ruby on rails tutorial · ruby on rails · postgres · web development

Your Rails uniqueness validation won't stop duplicates

After this episode the viewer can stop bad data at the model with validates and normalizes, show the errors in the form, and back the rule with a database index.