// Hero section with three variants: banner, terminal, diagram const { useState: uH, useEffect: eH, useRef: rH, useMemo: mH } = React; function HeroNav({ theme }) { const [scrolled, setScrolled] = useState(false); const [active, setActive] = useState('top'); useEffect(() => { const onScroll = () => { setScrolled(window.scrollY > 24); const ids = ['pipeline', 'integrations', 'cta']; let current = 'top'; for (const id of ids) { const el = document.getElementById(id); if (el && el.getBoundingClientRect().top < 120) current = id; } setActive(current); }; window.addEventListener('scroll', onScroll, { passive: true }); onScroll(); return () => window.removeEventListener('scroll', onScroll); }, []); const sections = [ ['pipeline', '#pipeline'], ['integrations', '#integrations'], ['install', '#cta'], ]; return ( ); } function MiniLogo({ theme }) { // Tiny 5x5 E in pixels const rows = [ "#####", "#....", "####.", "#....", "#####", ]; return (
{rows.map((r, i) => (
{r.split("").map((c, j) => (
))}
))}
); } function StatusStrip({ theme }) { const items = [ ['LOCAL-FIRST', 'SQLite, no cloud'], ['136 METRICS', '76 obj · 60 LLM'], ['9 OPTIMIZERS', 'GEPA · OPRO · MIPROv2 · +6'], ['14 FRAMEWORKS','auto-instrumented'], ['MIT', 'OSS'], ]; return (
{items.map(([k, v], i) => (
{k} {v}
))}
); } function HeroBanner({ theme }) { // Big pixel "EVALYN" banner const [pxSize, setPxSize] = useState(14); useEffect(() => { const onResize = () => { const w = window.innerWidth; if (w < 900) setPxSize(8); else if (w < 1200) setPxSize(11); else setPxSize(14); }; onResize(); window.addEventListener('resize', onResize); return () => window.removeEventListener('resize', onResize); }, []); return (
{/* Background grid */}
v0.3.0 · open source · MIT
EVALUATION AS A SERVICE.

Let your agents evolve — privately.
The local-first evaluation framework for LLM agents.

Trace, score, calibrate. 136 built-in metrics. Nine calibration optimizers. Zero cloud. One decorator.

); } function HeroTerminal({ theme }) { return (
local-first eval for agents

Run evals{' '} one-click.
Keep your data.

A complete evaluation pipeline for LLM agents — trace, dataset, metrics, calibration — that runs entirely on your machine.

); } function HeroDiagram({ theme }) { return (
the full loop

Five steps from raw traces to calibrated production-grade agents.

Collect. Build. Evaluate. Calibrate. Expand. One decorator wires your agent; one command runs the whole loop.

); } function PipelineMini({ theme }) { const steps = ["collect", "build", "evaluate", "calibrate", "expand"]; return (
EVALYN.PIPELINE 5 STAGES · 1 LOOP
{steps.map((s, i) => (
0{i+1} {s} stage/{i+1}
))}
); } function Hero({ theme }) { if (theme.heroVariant === 'terminal') return ; if (theme.heroVariant === 'diagram') return ; return ; } Object.assign(window, { Hero, HeroNav, HeroBanner, HeroTerminal, HeroDiagram, StatusStrip, MiniLogo });