Codex Working

1"use client";
2 
3import * as React from "react";
4import { cn } from "@/lib/utils";
5 
6/**
7 * CodexWorking — Codex's "Working" line.
8 *
9 * A static `•` bullet, the word Working with Codex's grayscale shimmer (a
10 * bright band drifting left→right), and `(Ns • esc to interrupt)`. Polite
11 * live region for screen readers.
12 */
13const BULLET = "#a7a7a7";
14const DIM = "#7a7a7a";
15const SHIMMER_DARK = "#808080";
16const SHIMMER_LIGHT = "#e7e7e7";
17 
18export function CodexWorking({
19  running = true,
20  label = "Working",
21  className,
22}: {
23  running?: boolean;
24  label?: string;
25  className?: string;
26}) {
27  const prefersReduced = usePrefersReducedMotion();
28  const [secs, setSecs] = React.useState(0);
29 
30  React.useEffect(() => {
31    if (!running) return;
32    const id = setInterval(() => setSecs((s) => s + 1), 1000);
33    return () => clearInterval(id);
34  }, [running]);
35 
36  if (!running) return null;
37 
38  return (
39    <div
40      role="status"
41      aria-live="polite"
42      className={cn(
43        "flex items-baseline gap-2 font-mono text-[13px] font-bold",
44        className,
45      )}
46    >
47      <style>{`
48        .cx-working-shimmer {
49          background-image: linear-gradient(
50            90deg,
51            ${SHIMMER_DARK} 0%,
52            ${SHIMMER_DARK} 40%,
53            ${SHIMMER_LIGHT} 50%,
54            ${SHIMMER_DARK} 60%,
55            ${SHIMMER_DARK} 100%
56          );
57          /* 200% size + 100%→−100% travel = one clean period (no loop hitch) */
58          background-size: 200% 100%;
59          -webkit-background-clip: text;
60          background-clip: text;
61          color: transparent;
62          -webkit-text-fill-color: transparent;
63          animation: cx-working-shine 1.6s linear infinite;
64        }
65        @keyframes cx-working-shine {
66          from { background-position: 100% 0; }
67          to   { background-position: -100% 0; }
68        }
69        @media (prefers-reduced-motion: reduce) {
70          .cx-working-shimmer {
71            animation: none;
72            background-image: none;
73            color: ${SHIMMER_LIGHT};
74            -webkit-text-fill-color: ${SHIMMER_LIGHT};
75          }
76        }
77      `}</style>
78      <span aria-hidden style={{ color: BULLET }}>
79        •
80      </span>
81      <span
82        className={prefersReduced ? undefined : "cx-working-shimmer"}
83        style={prefersReduced ? { color: SHIMMER_LIGHT } : undefined}
84      >
85        {label}
86      </span>
87      <span className="font-normal" style={{ color: DIM }}>
88// … truncated