Agent Activity Timeline

A timeline of everything an agent did: its thinking, tool calls, results and messages, with times and a filter by type.

Download the file Open full screen

One HTML file with the CSS and JavaScript inside. No library needed. MIT license.

Live preview

How to use it

Click Copy the code, or download the file.
Paste the CSS into your stylesheet, the HTML where you want the component, and the script before the closing body tag.
Change --accent at the top of the CSS to your brand color, then connect the events to your AI service.

What you get

Works in light and dark mode automatically
Keyboard friendly, with labels for screen readers
Fits phones, tablets and desktops
Respects the reduced motion setting
No framework, so it works with any stack

The code

<!DOCTYPE html>
<!--
  Agent Activity Timeline: a free AI UI component
  From 100 Free AI UI Components by MM Rahman Bappi, MIT license
  https://mmrahmanbappi.github.io/100-free-ai-ui-components/

  How to use: copy the CSS, HTML and JavaScript below into your page.
  Colors are CSS variables at the top. Change --accent to match your brand.
  Light and dark themes follow the visitor's system setting, or set
  data-theme="dark" or data-theme="light" on the html element.
-->
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Agent Activity Timeline | Free AI UI Component</title>
<meta name="description" content="A timeline of everything an agent did: its thinking, tool calls, results and messages, with times and a filter by type.">
<meta name="robots" content="noindex, follow">
<style>
:root{
  --accent:#5b5bd6; --accent-ink:#fff; --accent-soft:#ececfc;
  --bg:#f7f7f8; --surface:#fff; --surface-2:#f1f1f4; --ink:#17171c; --text:#3a3a44; --muted:#6c6c78;
  --line:#e3e3e8; --good:#15803d; --warn:#b45309; --bad:#c62828;
  --radius:14px; --shadow:0 1px 2px rgba(20,20,30,.06),0 8px 24px -12px rgba(20,20,30,.18);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif; --mono:ui-monospace,"Cascadia Code",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}}
:root[data-theme=dark]{
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{margin:0}
body{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr);place-items:center;padding:24px;background:var(--bg);color:var(--text);font:15px/1.5 var(--font);-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition:none!important}}
/* ---- component ---- */
.wrap{width:min(100%,620px);display:flex;flex-direction:column;gap:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px}
.card h2{font-size:15px;margin:0 0 4px;color:var(--ink)}
.muted{color:var(--muted);font-size:13px}
.num{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;cursor:pointer}
.btn:hover{border-color:var(--accent)}.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sm{padding:5px 10px;font-size:13px;border-radius:8px}
.ib{width:28px;height:28px;display:grid;place-items:center;border:0;background:none;color:var(--muted);border-radius:7px;cursor:pointer;flex:none}
.ib:hover{background:var(--surface-2);color:var(--ink)}.ib:disabled{opacity:.3;cursor:not-allowed}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;border-radius:99px;padding:2px 9px;border:1px solid}
.pill.run{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.pill.ok{color:var(--good);border-color:color-mix(in srgb,var(--good) 40%,var(--line))}
.pill.bad{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,var(--line))}
.pill.wait{color:var(--muted);border-color:var(--line)}
pre{margin:0;font:12.5px/1.55 var(--mono);background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;overflow-x:auto;color:var(--ink)}
.tg{width:40px;height:23px;border-radius:99px;background:var(--line);position:relative;flex:none;border:0;cursor:pointer;padding:0}
.tg::after{content:"";position:absolute;top:3px;left:3px;width:17px;height:17px;border-radius:50%;background:#fff;transition:left .15s}
.tg[aria-checked=true]{background:var(--accent)}.tg[aria-checked=true]::after{left:20px}
.flt{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.flt button{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;padding:4px 12px;font-size:13px;cursor:pointer}
.flt button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
ol.tl{list-style:none;margin:0;padding:0 0 0 6px;position:relative}
ol.tl::before{content:"";position:absolute;left:15px;top:8px;bottom:8px;width:2px;background:var(--line)}
ol.tl li{position:relative;display:grid;grid-template-columns:22px 1fr auto;gap:12px;padding:7px 0;align-items:start}
ol.tl .dot{width:20px;height:20px;border-radius:50%;border:3px solid var(--surface);position:relative;z-index:1;margin-top:1px}
ol.tl b{display:block;font-size:13px;color:var(--ink)}ol.tl p{margin:1px 0 0;font-size:13.5px;color:var(--text);overflow-wrap:anywhere}
ol.tl time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.think{background:#8b5cf6}.tool{background:#0ea5e9}.result{background:#16a34a}.msg{background:var(--accent)}
</style>
</head>
<body>
<div class="wrap"><div class="card">
  <h2>What the agent did</h2><p class="muted" style="margin:0">Research task, 7 steps</p>
  <div class="flt" role="group" aria-label="Filter by type" id="flt"></div>
  <ol class="tl" id="tl"></ol>
</div></div>
<script>
// Demo helper: add ?theme=dark or ?theme=light to the address to preview a theme.
(function(){var t=new URLSearchParams(location.search).get('theme');if(t)document.documentElement.dataset.theme=t;})();
var EV=[['think','Thought','I need current prices before I can compare the laptops.','10:02:04'],['tool','Tool call','search_web("lightweight laptop under 1000")','10:02:05'],
['result','Result','Found 8 reviews and 3 price lists.','10:02:07'],['think','Thought','Two models appear in most reviews. I will compare battery life.','10:02:08'],
['tool','Tool call','read_page("review-site.example/laptops-2026")','10:02:09'],['result','Result','Battery: model A 14 hours, model B 11 hours.','10:02:12'],['msg','Message','Model A is the better pick for travel because of the longer battery life.','10:02:14']];
var TYPES=[['all','All'],['think','Thinking'],['tool','Tool calls'],['result','Results'],['msg','Messages']],flt=document.getElementById('flt'),tl=document.getElementById('tl');
function render(f){tl.innerHTML='';EV.filter(function(e){return f==='all'||e[0]===f;}).forEach(function(e){var li=document.createElement('li');
  li.innerHTML='<span class="dot '+e[0]+'" aria-hidden="true"></span><div><b></b><p></p></div><time></time>';li.querySelector('b').textContent=e[1];li.querySelector('p').textContent=e[2];li.querySelector('time').textContent=e[3];tl.appendChild(li);});}
TYPES.forEach(function(t,i){var b=document.createElement('button');b.type='button';b.textContent=t[1];b.setAttribute('aria-pressed',i===0);
  b.onclick=function(){flt.querySelectorAll('button').forEach(function(x){x.setAttribute('aria-pressed',x===b);});render(t[0]);};flt.appendChild(b);});
render('all');
</script>
</body>
</html>

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Agent Activity Timeline

How to use it

What you get

The code

More agents and tools components

Tool Call Card

Action Approval Request

Editable Task Plan

File Change Preview

Web Results Card

Agent Run Log