Merge conflicts

An agent opens a pull request, finds that main has moved underneath it, resolves the conflicts and merges, all inside one card.

Press Create PR, or type in the box and press Enter. Hover or focus “3 conflicts” to see the lines, and the check chips to see each command.

Sample repository, people and commits. Nothing is pushed anywhere.

Key CSS & implementation tricks

// model.js: a segment never leaves its own row
if (i > top1 && i <= iBase) {
  const d = i === iBase
    ? `M${x1} -16C${x1} 6 ${x0} 2 ${x0} 16` // curve off main
    : `M${x1} -16V16`;                      // straight through
  line(d, branch);
}
// main joins the branch at the merge commit, rows above
const ty = 16 - ROW * (i - iMm);

.g svg { position: absolute; inset: 0; overflow: visible; }
.row { height: 32px; transition: height .34s var(--ease), opacity .34s; }
.row.enter { height: 0; opacity: 0; }

.shim {
  --sb: var(--mut); --sh: var(--fg);
  background: linear-gradient(100deg, var(--sb) 36%,
    var(--sh) 47%, var(--sh) 53%, var(--sb) 64%);
  background-size: 280% 100%;
  background-clip: text; color: transparent;
  animation: shim 2s linear infinite;
}
.ttl.shim.tone-you { --sb: var(--fg); --sh: var(--faint); }

/* 4 + 28 = one 32px row */
.g path.flow { stroke-dasharray: 4 28; animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: 32; } }

S.card.flow = ['m', 'mm'];  // resolving: main flows into the branch
S.card.flow = [];           // waiting for you: lights out

export function scrambleFrame(text, progress, random = Math.random) {
  const n = Math.floor(progress * progress * text.length); // fast, then slow
  let tail = '';
  for (let i = n; i < text.length; i++)
    tail += text[i] === ' ' ? ' ' : NOISE[Math.floor(random() * NOISE.length)];
  return { head: text.slice(0, n), tail };      // tail is drawn fainter
}

// Only a change of shape blurs; a ticking counter does not.
export const shape = s => String(s).replace(/\d+/g, '#');
if (shape(before) !== shape(after)) restart(el, 'blurin');

const wait = ms => new Promise(r => ff ? r() : setTimeout(r, ms))
  .then(() => { if (id !== runId) throw CANCEL; });

async function flow() {
  mark('idle');
  await gate('start');        // Create PR, Enter, or Autoplay
  /* … */
  mark('conflicts');
  await gate('resolve');
}
function start(target) {      // jump: replay instantly up to a mark
  runId++; ff = target;
  root.classList.add('ff');
  flow();
}
foot = { icon: 'spin', step: ['testing', n, TESTS] }; // keys, not strings

CSS ↗View the source