{/* Three horizontal "rails" roughly under the three hop cards */}
{/* Traveling packets along an invisible path */}
{[0, 1, 2, 3].map(i => (
))}
);
}
// ------------------------------------------------------------
// Main component — drives phases for all 3 hops with a simple
// state machine and timers.
// ------------------------------------------------------------
function PipelineExplorer({ defaultMode = 'optimized' }) {
const [activeId, setActiveId] = usePE('rate-limiter');
const [mode, setMode] = usePE(defaultMode);
const [hover, setHover] = usePE(null);
// Active hop (0, 1, 2) — the one currently typing or compressing
const [activeHop, setActiveHop] = usePE(0);
// Reveal count for the active hop's typing phase
const [reveal, setReveal] = usePE(0);
// Per-hop phase: 'pending' | 'typing' | 'highlighting' | 'deleting' | 'done'
const [phases, setPhases] = usePE(['pending', 'pending', 'pending']);
// Per-hop per-token char-erase counts: { [tokenIndex]: charsEatenFromRight }
const [eaten, setEaten] = usePE([{}, {}, {}]);
const [runToken, setRunToken] = usePE(0); // bumps on reset to cancel old timers
const [startHop, setStartHop] = usePE(0); // which hop to start the run at (0..2)
const [isVisible, setIsVisible] = usePE(false);
// Imperative hooks for keyboard skip/back — updated by the run loop
const skipRef = useRfPE({ finishCurrent: () => {}, advanceHop: () => {} });
const rootRef = useRfPE(null);
const task = useMmPE(() => TASKS.find(t => t.id === activeId), [activeId]);
// ---------- Run pipeline ----------
// Each time runToken or activeId or mode changes, kick off a fresh run.
useEfPE(() => {
let cancelled = false;
let skipCurrent = false; // finish typing + deletion for current hop instantly
let advanceNow = false; // skip to next hop
const timers = [];
const push = (fn, ms) => {
const id = setTimeout(() => { if (!cancelled) fn(); }, ms);
timers.push(id);
};
const wait = (ms) => new Promise(r => push(r, ms));
// Expose skip/advance to the keyboard handler
skipRef.current = {
finishCurrent: () => { skipCurrent = true; },
advanceHop: () => { advanceNow = true; skipCurrent = true; },
};
async function runHop(h) {
if (cancelled) return;
skipCurrent = false;
advanceNow = false;
const hopTokens = [task.a1, task.a2, task.a3][h];
setActiveHop(h);
setReveal(0);
setPhases(p => { const n = [...p]; n[h] = 'typing'; return n; });
// Clear eaten state for this hop
setEaten(e => { const n = [...e]; n[h] = {}; return n; });
// Type out word by word
const total = hopTokens.length;
const perTok = Math.max(32, Math.min(65, 5500 / total));
for (let i = 0; i <= total; i++) {
if (cancelled) return;
if (skipCurrent) { setReveal(total); break; }
setReveal(i);
await wait(perTok);
}
if (cancelled) return;
if (mode === 'optimized') {
// Highlighting phase — quick flash of red to mark all droppable tokens
setPhases(p => { const n = [...p]; n[h] = 'highlighting'; return n; });
await wait(skipCurrent ? 250 : 700);
if (cancelled) return;
// Deleting phase — CHAR-BY-CHAR backspace in a wave, ~1.1s total
setPhases(p => { const n = [...p]; n[h] = 'deleting'; return n; });
// Collect droppable token indices in reading order
const droppable = [];
for (let idx = 0; idx < hopTokens.length; idx++) {
const k = hopTokens[idx].k;
if (k === 'filler' || k === 'redundant') droppable.push(idx);
}
if (droppable.length > 0) {
// Target: finish all deletions in ~1000ms, with a wavy overlap so you
// see multiple words being backspaced at once.
const targetMs = skipCurrent ? 180 : 1000;
const maxLen = Math.max(...droppable.map(i => hopTokens[i].t.length));
// Start-stagger between words: small to make the wave feel dense & urgent
const staggerStep = Math.max(18, (targetMs - 200) / Math.max(1, droppable.length));
// Char tick: fast backspace
const charTick = Math.max(22, Math.min(55, 550 / maxLen));
// Each word's animation: start at its stagger offset, then tick each char
const wordPromises = droppable.map((tokIdx, orderI) => new Promise((resolve) => {
const len = hopTokens[tokIdx].t.length;
const startDelay = orderI * staggerStep;
const startId = setTimeout(() => {
if (cancelled) return resolve();
let step = 0;
const iv = setInterval(() => {
if (cancelled || skipCurrent) {
clearInterval(iv);
setEaten(e => {
const n = [...e];
n[h] = { ...n[h], [tokIdx]: len };
return n;
});
return resolve();
}
step++;
setEaten(e => {
const n = [...e];
n[h] = { ...n[h], [tokIdx]: step };
return n;
});
if (step >= len) {
clearInterval(iv);
resolve();
}
}, charTick);
timers.push(iv);
}, startDelay);
timers.push(startId);
}));
await Promise.all(wordPromises);
}
if (cancelled) return;
await wait(skipCurrent ? 80 : 280);
}
setPhases(p => { const n = [...p]; n[h] = 'done'; return n; });
// Small pause between hops — but if user pressed →, skip it
await wait(advanceNow ? 0 : (skipCurrent ? 150 : 500));
}
(async () => {
// Pre-fill any hops before startHop as 'done' so the UI shows the
// state you'd be in if those had already played.
const initPhases = ['pending', 'pending', 'pending'];
const initEaten = [{}, {}, {}];
const hopTokArr = [task.a1, task.a2, task.a3];
for (let i = 0; i < startHop; i++) {
initPhases[i] = 'done';
if (mode === 'optimized') {
// Mark all droppable tokens as fully eaten
const map = {};
hopTokArr[i].forEach((tk, idx) => {
if (tk.k === 'filler' || tk.k === 'redundant') map[idx] = tk.t.length;
});
initEaten[i] = map;
}
}
setPhases(initPhases);
setEaten(initEaten);
setReveal(startHop < 3 ? 0 : hopTokArr[2].length);
setActiveHop(Math.min(startHop, 2));
await wait(250);
for (let h = startHop; h < 3; h++) {
if (cancelled) return;
await runHop(h);
}
})();
return () => {
cancelled = true;
timers.forEach(id => { clearTimeout(id); clearInterval(id); });
};
}, [activeId, mode, runToken, task]);
// Per-hop reveal counts (only the active hop is actively advancing)
const reveals = useMmPE(() => {
const lens = [task.a1.length, task.a2.length, task.a3.length];
return [0, 1, 2].map(h => {
if (phases[h] === 'pending') return 0;
if (phases[h] === 'typing') return h === activeHop ? reveal : 0;
return lens[h]; // highlighting/deleting/done: all tokens placed
});
}, [phases, activeHop, reveal, task]);
// Cost progress — hop counts as "sent" once it starts typing
const costProgress = useMmPE(() => {
let p = 0;
for (let h = 0; h < 3; h++) {
if (phases[h] !== 'pending') p = h + 1;
}
return p;
}, [phases]);
// Scroll focused hop into view horizontally WITHOUT affecting the page's
// vertical scroll position (scrollIntoView with block:'nearest' can still
// pull the page up/down when the strip is partially off-screen).
const stripRef = useRfPE(null);
useEfPE(() => {
const container = stripRef.current;
const el = container?.children[activeHop];
if (!container || !el) return;
const targetLeft = el.offsetLeft - (container.clientWidth - el.offsetWidth) / 2;
container.scrollTo({ left: Math.max(0, targetLeft), behavior: 'smooth' });
}, [activeHop]);
function pickTask(id) {
setActiveId(id);
setStartHop(0);
setRunToken(n => n + 1);
}
function replay() { setStartHop(0); setRunToken(n => n + 1); }
function skipToEnd() {
setRunToken(n => n + 10000); // cancel
setPhases(['done', 'done', 'done']);
// Mark all droppable tokens as fully eaten so the final state looks correct
if (mode === 'optimized') {
const finalEaten = [task.a1, task.a2, task.a3].map(toks => {
const map = {};
toks.forEach((tk, idx) => {
if (tk.k === 'filler' || tk.k === 'redundant') map[idx] = tk.t.length;
});
return map;
});
setEaten(finalEaten);
}
}
function switchMode(m) {
setMode(m);
setStartHop(0);
setRunToken(n => n + 1);
}
// ---- Visibility gating for arrow keys ----
useEfPE(() => {
if (!rootRef.current) return;
const obs = new IntersectionObserver((entries) => {
entries.forEach(e => setIsVisible(e.isIntersecting && e.intersectionRatio > 0.3));
}, { threshold: [0, 0.3, 0.6, 1] });
obs.observe(rootRef.current);
return () => obs.disconnect();
}, []);
// ---- Keyboard handler ----
useEfPE(() => {
if (!isVisible) return;
function onKey(ev) {
// Ignore when focus is in an input/textarea/contenteditable
const t = ev.target;
if (t && (t.tagName === 'INPUT' || t.tagName === 'TEXTAREA' || t.isContentEditable)) return;
if (ev.key === 'ArrowRight') {
ev.preventDefault();
// If all hops are done, do nothing
const allDone = phases.every(p => p === 'done');
if (allDone) return;
// If the active hop is mid-typing, finish typing first (one press = finish current step).
// If the active hop is fully done ('done'), advance to next hop (the run loop already advances on its own,
// but pressing here shortcuts the inter-hop pause).
const curPhase = phases[activeHop];
if (curPhase === 'typing' || curPhase === 'highlighting' || curPhase === 'deleting') {
skipRef.current.finishCurrent();
} else {
skipRef.current.advanceHop();
}
} else if (ev.key === 'ArrowLeft') {
ev.preventDefault();
// Step back to the previous hop. If we're on hop 0, restart the task.
const back = Math.max(0, activeHop - 1);
setStartHop(back);
setRunToken(n => n + 1);
}
}
window.addEventListener('keydown', onKey);
return () => window.removeEventListener('keydown', onKey);
}, [isVisible, phases, activeHop]);
return (
{/* Task pills */}
Try a task →
{TASKS.map(t => {
const active = t.id === activeId;
return (
);
})}
{/* User prompt bar */}
USER →
{task.user}
→
to finish current
{/* Main grid — cost readout moved BELOW so three hops can breathe */}
{[
{ role: '01 · ARCHITECT', subtitle: 'Chooses the approach', toks: task.a1, out: task.a1Tokens,
inB: task.baseline.call1, inO: task.optimized.call1 },
{ role: '02 · BUILDER', subtitle: 'Writes the implementation', toks: task.a2, out: task.a2Tokens,
inB: task.baseline.call2, inO: task.optimized.call2 },
{ role: '03 · REVIEWER', subtitle: 'Flags risks · approves', toks: task.a3, out: task.a3Tokens,
inB: task.baseline.call3, inO: task.optimized.call3 },
].map((h, i) => (
))}
{/* Mode toggle + legend */}
{[
{ k: 'baseline', label: 'Raw (no layer)' },
{ k: 'optimized', label: 'With Brevitas' },
].map(({ k, label }) => {
const active = mode === k;
return (
);
})}
Kept
Identifier
Dropped
Filler
{/* Hover tooltip */}
{hover && hover.tok && dropReason[hover.tok.k] && (
{hover.tok.k}
{dropReason[hover.tok.k]}
)}
);
}
const btnStyle = {
background: 'transparent', border: '1px solid var(--line)', color: 'var(--stone-2)',
padding: '6px 11px', fontFamily: 'JetBrains Mono, monospace', fontSize: 10.5,
letterSpacing: '0.08em', cursor: 'pointer', borderRadius: 2, textTransform: 'uppercase',
};
const kbdStyle = {
display: 'inline-block',
padding: '2px 6px',
border: '1px solid currentColor',
borderRadius: 2,
fontFamily: 'JetBrains Mono, monospace',
fontSize: 10,
lineHeight: 1,
marginRight: 2,
};
Object.assign(window, { PipelineExplorer });