{"slug": "llm-rewrite-of-the-terminaltexteffects-python", "title": "LLM Rewrite of the TerminalTextEffects Python", "summary": "A Rust port of the Python TerminalTextEffects (TTE) library, called ttfx, delivers byte-identical frames to the original while starting in ~1 ms versus ~90 ms and achieving a median 9.6× speedup across all 37 effects, according to benchmarks from the project's CI. The parity port, created by Omacom for the Omarchy project, reproduces upstream quirks and is verified against TTE v0.15.0, with two deliberate differences: xoshiro256++ random number generation and no Python plugin support.", "body_md": "Terminal text effects as a single static binary. Pipe text in, pick an effect:\n\n```\nls -la | ttfx decrypt\ncat banner.txt | ttfx beams\nfortune | ttfx --random-effect\ngit log --oneline -10 | ttfx matrix\n```\n\n**This is a port of TerminalTextEffects\n(TTE) by ChrisBuilds.** Every effect, the animation engine,\nand the command-line interface are their design — this project translates that work to Rust\nand adds nothing of its own to the art. If you like what you see here, star the original.\n\nTTE is MIT licensed and so is this port; the original copyright is preserved in\n[LICENSE](/omacom-io/ttfx/blob/master/LICENSE) and [NOTICE](/omacom-io/ttfx/blob/master/NOTICE). Please file *effect* ideas upstream, where they belong.\n\nTTE is a Python package. That's the right call for a library, but for a shell toy that lives in your prompt pipeline it means an interpreter, an install step, and ~90 ms of import before the first frame. ttfx is one dependency-free binary that starts in ~1 ms.\n\nThat difference is the whole reason this exists. On a fullscreen canvas the heavier effects can't hold a high frame rate under Python:\n\n| At 200×50 cells | ttfx | Python TTE |\n|---|---|---|\n| beams | 564 fps | 71 fps |\n| slide | 5,113 fps | 264 fps |\n| waves | 4,118 fps | 491 fps |\n| startup | 1.2 ms | 107 ms |\n\nAcross all 37 effects the median speedup is **9.6×** (range 4.5×–21.6×).\n\nThis is a *parity port*, not a reimplementation-in-spirit. Given the same input, config, and\nrandom draws, ttfx produces **byte-identical frames** to the Python original — verified\nmechanically in CI against a pinned upstream checkout (v0.15.0), not by eyeballing.\n\n| Suite | Checks | What it proves |\n|---|---|---|\n`tools/parity/run_suite.sh` |\n354 | every effect's frame stream, byte for byte, across configs and seeds |\n`tools/parity/tty_compare.sh` |\n41 | the full terminal byte stream — canvas prep, cursor moves, teardown |\n`tools/tests/cli_corpus.sh` |\n19 | exit codes and stdout/stderr routing |\n`cargo test` |\ngoldens + traces | easing/geometry/gradient values and engine state machines |\n\nMaking that possible meant reproducing upstream's quirks deliberately, not \"fixing\" them:\nPython's banker's rounding, gradients built from integer floor division rather than float\ninterpolation, a bezier arc-length approximation that drops its final segment, and looping\nscenes that report themselves complete on every tick. They're catalogued in\n[ plan.md](/omacom-io/ttfx/blob/master/plan.md); the places where Python's unordered iteration had to be pinned down are\nin\n\n[.](/omacom-io/ttfx/blob/master/docs/ordering-inventory.md)\n\n`docs/ordering-inventory.md`\n\n**Two deliberate differences.** Random number generation is not bit-compatible with CPython —\nttfx uses xoshiro256++, so `--seed`\n\nis reproducible within ttfx but won't match Python's\nMersenne Twister. (The parity harness swaps a shared PRNG into both sides, which is what makes\nframe comparison possible at all.) And Python plugin effects aren't supported, since there's\nno interpreter to load them.\n\n```\n<producer> | ttfx [terminal options] <effect> [effect options]\n\nttfx --help                 # all 37 effects and the terminal options\nttfx <effect> --help        # options for one effect\nttfx --random-effect        # surprise me (--include-effects / --exclude-effects to filter)\nttfx --print-completion bash|zsh\n```\n\nTerminal options (canvas size and anchoring, color handling, frame rate, text wrapping) go\nbefore the effect name; effect options after it. Option names and defaults match `tte`\n\n, so\nexisting invocations work with the binary name swapped.\n\n```\ncargo build --release\ncargo build --release --target x86_64-unknown-linux-musl   # static, ~3.3 MB\n```\n\nRunning the parity suites needs python3 and a copy of upstream:\n\n```\n./tools/parity/fetch_reference.sh   # clones TTE at the pinned commit\n./tools/parity/run_suite.sh\n```\n\nUpstream is not vendored here — the harness fetches it, because it's their code.\n\nLinux and macOS. Built for [Omarchy](https://omarchy.org) originally; nothing targets a\nspecific libc, and CI runs the tests and CLI corpus on both platforms. The byte-exact\nparity suites stay pinned to Linux/glibc — Apple's libm rounds a few transcendentals a\nlast-ulp differently, which quantization hides in real frames but a bit-exact comparison\nwould surface.\n\nMIT — see [LICENSE](/omacom-io/ttfx/blob/master/LICENSE), which carries both this project's copyright and the original\nTerminalTextEffects copyright, and [NOTICE](/omacom-io/ttfx/blob/master/NOTICE) for the attribution in full.", "url": "https://wpnews.pro/news/llm-rewrite-of-the-terminaltexteffects-python", "canonical_source": "https://github.com/omacom-io/ttfx", "published_at": "2026-08-10 13:17:16+00:00", "updated_at": "2026-08-10 13:43:39.238671+00:00", "lang": "en", "topics": ["developer-tools", "artificial-intelligence"], "entities": ["TerminalTextEffects", "ChrisBuilds", "ttfx", "Omacom", "Omarchy", "Rust", "Python"], "alternates": {"html": "https://wpnews.pro/news/llm-rewrite-of-the-terminaltexteffects-python", "markdown": "https://wpnews.pro/news/llm-rewrite-of-the-terminaltexteffects-python.md", "text": "https://wpnews.pro/news/llm-rewrite-of-the-terminaltexteffects-python.txt", "jsonld": "https://wpnews.pro/news/llm-rewrite-of-the-terminaltexteffects-python.jsonld"}}