Tool Call Trail

An agent's tool calls drawn as a path, with a spark on the step running now.

PROGet Tool Call Trail and 168 other Pro components with pro lifetime — Get Pro

Category
Creative
Access
Pro
Source
196 lines · one file
States
6 drawn

The decision inside it

A failure stays where it happened

A failed call turns red with its reason and the line stops there, so the reader sees how far it got and why. A retry is a new step after it, not an overwrite: the failure keeps its mark and the line carries on. Only a running step gets the spark, so a stalled run looks stalled.

When to use it

Use Tool Call Trail to show an agent's run step by step: each tool call with its status, result or failure, and retries kept in order.

Installation

How you get it

Paste this into Claude Code, Cursor, Codex or any coding agent. It installs the file and uses it as it is, instead of writing a new one.

Use Liro's Tool Call Trail for this.
Install it: npx shadcn@latest add @liro/tool-call-trail
(the @liro registry is set up in components.json, with LIRO_KEY in .env.local)
Import it from @/components/ui/tool-call-trail.
Do not rewrite or restyle it. Pass my data through its props
and keep its built-in states.

For the full brief with every prop and the mistakes assistants usually make, use Copy prompt above. Pro components install through the @liro registry with your CLI token: see the Namespaced tab.

Usage

components/agent-run.tsx
import { ToolCallTrail, type ToolStep } from "@/components/ui/tool-call-trail";

const steps: ToolStep[] = [
  { id: "a", tool: "search_docs", title: "Find the Q2 invoices", status: "done", detail: "6 invoices", duration: "0.8s" },
  { id: "b", tool: "read_ledger", title: "Read payments", status: "running" },
];

export function AgentRun() {
  return <ToolCallTrail steps={steps} />;
}

API reference

“Copy prompt” above puts a full brief on your clipboard, install command, dependencies, props, and the mistakes an assistant usually makes with this component.

Props

Read from the component’s own TypeScript interface when the site is built, so this table cannot drift from the file you install.

TypeNotes
stepsToolStep[] Yes–

Dependencies

npm packages

clsxframer-motionlucide-reacttailwind-merge

Liro foundations, installed alongside it

liro-theme

States

All of them are drawn by the component. None is left for you to design.

  • Pending
  • Running
  • Done
  • Failed
  • Retried
  • Reduced motion

Accessibility

  • Keyboard reachable throughout, in visual order
  • Focus trapped in overlays, Escape closes them
  • Focus returns to whatever opened it
  • Live regions announce what changed, not that something did
  • Honours prefers-reduced-motion

Responsive behavior

  • Sizes to its container, not the viewport
  • Usable from 320px up
  • Pointer-based interaction, so trackpad and touch both work
  • No hover-only affordances

Used in a screenAll screens

ScreenPro

Agent Run

One agent run, live: its plan, every tool call, a pause for approval and the finished output.