# ToolLedger
A live agent activity card listing tool calls, nested groups, parallel runs, failures and expandable details.
## 1. Setup
// npm install framer-motion
File: components-workspace/tool-ledger/index.tsx · 'use client' · export default function ToolLedger(props: ToolLedgerProps)
Tailwind CSS v4, with the dark: variant following your theme. Colors come from the component variables in THEME_VARS.
The @/app/_icons imports are the AI Canvas icon set. Without it, use any icon components that accept size, weight and SVG props, with a matching IconProps type.
import { Fragment, useEffect, useId, useLayoutEffect, useRef, useState, useSyncExternalStore } from 'react'
import type * as React from 'react'
import { animate, AnimatePresence, motion, useIsPresent, useMotionValue, useTransform } from 'framer-motion'
import { RotateCcw } from '@/app/_icons/icons/rotate-ccw'
import { ChevronRight } from '@/app/_icons/icons/chevron-right'
import { Check } from '@/app/_icons/icons/check'
import { LoaderCircle } from '@/app/_icons/icons/loader-circle'
import { CircleCheckDuotone } from '@/app/_icons/icons/circle-check-duotone'
import { CircleDashedDuotone } from '@/app/_icons/icons/circle-dashed-duotone'
import { CircleStopDuotone } from '@/app/_icons/icons/circle-stop-duotone'
import { CircleXDuotone } from '@/app/_icons/icons/circle-x-duotone'
import { FilePlusDuotone } from '@/app/_icons/icons/file-plus-duotone'
import { FileTextDuotone } from '@/app/_icons/icons/file-text-duotone'
import { GlobeDuotone } from '@/app/_icons/icons/globe-duotone'
import { MessageCircleDuotone } from '@/app/_icons/icons/message-circle-duotone'
import { Pen2Duotone } from '@/app/_icons/icons/pen-2-duotone'
import { SearchDuotone } from '@/app/_icons/icons/search-duotone'
import { TerminalDuotone } from '@/app/_icons/icons/terminal-duotone'
import type { IconProps } from '@/app/_icons/IconBase'
## 2. Constants
export type Tuning = {
cardMaxW: number
rowH: number
subRowH: number
iconPx: number
spinnerPx: number
previewLines: number
failureLines: number
fullOutputLines: number
codeLineH: number
hoverMs: number
stateMs: number
enterMs: number
enterRisePx: number
rowRisePx: number
staggerMs: number
stopPx: number
panelMs: number
lightMs: number
holdMs: number
pressScale: number
spinS: number
shimmerS: number
tickMs: number
demoSpeed: number
dotPitch: number
dotFieldH: number
dotRoomPx: number
}
export const TUNING: Tuning = {
cardMaxW: 480,
rowH: 36,
subRowH: 32,
iconPx: 16,
spinnerPx: 14,
previewLines: 4,
failureLines: 4,
fullOutputLines: 12,
codeLineH: 18,
hoverMs: 150,
stateMs: 200,
enterMs: 280,
enterRisePx: 6,
rowRisePx: 4,
staggerMs: 40,
stopPx: 32,
panelMs: 280,
lightMs: 600,
holdMs: 8000,
pressScale: 0.97,
spinS: 0.8,
shimmerS: 2.6,
tickMs: 100,
demoSpeed: 1,
dotPitch: 6,
dotFieldH: 64,
dotRoomPx: 12,
}
const EASE = [0.23, 1, 0.32, 1] as const
// Rail geometry: must match the rows' px-3 padding and gap-2.5.
const PAD_X = 12
const TEXT_GAP = 10
const RAIL_GAP = 4
const LABEL_H = 24
export type ActionKind = 'read' | 'search' | 'edit' | 'create' | 'run' | 'fetch' | 'ask'
export type ActionStatus = 'queued' | 'running' | 'done' | 'failed' | 'stopped'
export type RunStatus = 'running' | 'done' | 'failed' | 'stopped'
export type Action = {
id: string
kind: ActionKind
label: string
doneLabel: string
target?: string
outcome?: string
tone?: 'neutral' | 'success' | 'failed'
diff?: { added: number; removed: number }
durationMs?: number
status: ActionStatus
input?: Record<string, string>
output?: string[]
outputTotal?: number
children?: Action[]
parallelGroup?: string
}
type ToolLedgerProps = {
actions?: Action[]
status?: RunStatus
elapsedMs?: number
label?: string
summary?: string
defaultCollapsed?: boolean
onActionToggle?: (id: string, expanded: boolean) => void
onStop?: () => void
className?: string
tuning?: Partial<Tuning>
}
const KIND_ICON: Record<ActionKind, React.ComponentType<IconProps>> = {
read: FileTextDuotone,
search: SearchDuotone,
edit: Pen2Duotone,
create: FilePlusDuotone,
run: TerminalDuotone,
fetch: GlobeDuotone,
ask: MessageCircleDuotone,
}
type Beat = Omit<Action, 'status' | 'durationMs' | 'children'> & {
at: number
end: number
fails?: boolean
children?: Beat[]
}
const FAILED_RUN = [
'FAIL src/date.test.ts',
'✗ parses an offset date',
' expected 09:00, got 07:00',
' at src/date.test.ts:4:5',
'✗ keeps the local day across midnight',
' expected 2026-03-09, got 2026-03-08',
' at src/date.test.ts:12:5',
'✓ parses a plain date',
'✓ formats a range',
'✓ rejects an empty string',
'Tests 2 failed, 56 passed (58)',
'Time 2.5s',
]
const STORY: Beat[] = [
{
id: 'search',
kind: 'search',
label: 'Searching',
doneLabel: 'Searched',
target: 'parseDate',
outcome: '6 matches',
at: 400,
end: 1000,
input: { pattern: '"parseDate"', path: '"src"' },
output: [
'src/date.ts:3 export function parseDate(',
'src/format.ts:1 import { parseDate } from "./date"',
'src/format.ts:4 const start = parseDate(a)',
'src/date.test.ts:1 import { parseDate } from "./date"',
'src/date.test.ts:4 expect(parseDate("2026-03-08T09:00+02:00"))',
'src/date.test.ts:12 expect(parseDate("2026-03-08"))',
],
},
{
id: 'read',
kind: 'read',
label: 'Reading',
doneLabel: 'Read',
target: '2 files',
outcome: '278 lines',
at: 1200,
end: 2200,
children: [
{
id: 'read-date',
kind: 'read',
label: 'Reading',
doneLabel: 'Read',
target: 'src/date.ts',
outcome: '212 lines',
at: 1200,
end: 1700,
input: { path: '"src/date.ts"', limit: '400' },
output: [
'import { parseOffset } from "./offset"',
'',
'export function parseDate(input: string): Date {',
' const [day, time] = input.split("T")',
],
outputTotal: 212,
},
{
id: 'read-test',
kind: 'read',
label: 'Reading',
doneLabel: 'Read',
target: 'src/date.test.ts',
outcome: '66 lines',
at: 1700,
end: 2200,
input: { path: '"src/date.test.ts"', limit: '400' },
output: [
'import { parseDate } from "./date"',
'',
'it("parses an offset date", () => {',
' expect(parseDate("2026-03-08T09:00+02:00"))',
],
outputTotal: 66,
},
],
},
{
id: 'fetch-zones',
kind: 'fetch',
label: 'Fetching',
doneLabel: 'Fetched',
target: 'docs.example.dev/time-zones',
outcome: '14 KB',
parallelGroup: 'docs',
at: 2400,
end: 3400,
input: { url: '"https://docs.example.dev/time-zones"' },
output: [
'# Time zones',
'A date without an offset is read as local time.',
'An offset like +02:00 moves the instant, not the wall clock.',
'Convert at the edge and store the instant.',
],
outputTotal: 186,
},
{
id: 'fetch-parsing',
kind: 'fetch',
label: 'Fetching',
doneLabel: 'Fetched',
target: 'docs.example.dev/parsing',
outcome: '9 KB',
parallelGroup: 'docs',
at: 2400,
end: 3900,
input: { url: '"https://docs.example.dev/parsing"' },
output: [
'# Parsing',
'A date string takes a day, a time and an optional offset.',
'2026-03-08T09:00+02:00 is 07:00 at offset zero.',
'Missing seconds default to 00.',
],
outputTotal: 122,
},
{
id: 'edit-1',
kind: 'edit',
label: 'Editing',
doneLabel: 'Edited',
target: 'src/date.ts',
diff: { added: 12, removed: 3 },
at: 4200,
end: 4900,
input: { path: '"src/date.ts"' },
output: [
'@@ parseDate @@',
'- const offset = 0',
'+ const offset = parseOffset(time)',
'+ const instant = toInstant(day, time, offset)',
],
outputTotal: 16,
},
{
id: 'test-1',
kind: 'run',
label: 'Running',
doneLabel: 'Ran',
target: 'npm test',
outcome: '2 failed',
fails: true,
at: 5200,
end: 7700,
input: { command: '"npm test"' },
output: FAILED_RUN,
},
{
id: 'edit-2',
kind: 'edit',
label: 'Editing',
doneLabel: 'Edited',
target: 'src/date.ts',
diff: { added: 2, removed: 1 },
at: 8400,
end: 9000,
input: { path: '"src/date.ts"' },
output: [
'@@ toInstant @@',
'- return new Date(ms - offset)',
'+ const local = ms + offset',
'+ return new Date(local)',
],
},
{
id: 'test-2',
kind: 'run',
label: 'Running',
doneLabel: 'Ran',
target: 'npm test',
outcome: '58 passed',
tone: 'success',
at: 9300,
end: 11200,
input: { command: '"npm test"' },
output: [
'✓ src/date.test.ts (24 tests)',
'✓ src/format.test.ts (34 tests)',
'Tests 58 passed (58)',
'Time 1.9s',
],
},
]
const STORY_DONE_AT = 11400
const STORY_LABEL = 'fix-date-parsing'
const STORY_SUMMARY = 'Changed 1 file, all 58 tests pass'
function beatAt(b: Beat, e: number, stopped: boolean): Action {
const { at, end, fails, children, ...rest } = b
const live: ActionStatus = e < at ? 'queued' : e < end ? 'running' : fails ? 'failed' : 'done'
const status: ActionStatus = stopped && (live === 'queued' || live === 'running') ? 'stopped' : live
const settled = status === 'done' || status === 'failed'
return {
...rest,
status,
outcome: settled ? rest.outcome : undefined,
diff: settled ? rest.diff : undefined,
output: settled ? rest.output : undefined,
durationMs: e < at ? undefined : (settled ? end : e) - at,
children: children?.map((c) => beatAt(c, e, stopped)),
}
}
function storyAt(e: number, stopped: boolean): Action[] {
return STORY.filter((b) => e >= b.at).map((b) => beatAt(b, e, stopped))
}
// Reduced motion as an external store: server and hydrating render both read false.
const REDUCED_QUERY = '(prefers-reduced-motion: reduce)'
function subscribeReduced(onChange: () => void) {
if (typeof window === 'undefined' || !window.matchMedia) return () => {}
const mq = window.matchMedia(REDUCED_QUERY)
mq.addEventListener('change', onChange)
return () => mq.removeEventListener('change', onChange)
}
function getReduced() {
return typeof window !== 'undefined' && !!window.matchMedia && window.matchMedia(REDUCED_QUERY).matches
}
function getReducedServer() {
return false
}
function stopAll(list: Action[]): Action[] {
return list.map((a) => ({
...a,
status: a.status === 'running' || a.status === 'queued' ? 'stopped' : a.status,
children: a.children && stopAll(a.children),
}))
}
function isBusy(a: Action): boolean {
return a.status === 'running' || a.status === 'queued' || (a.children ?? []).some(isBusy)
}
function runningCalls(list: Action[]): Action[] {
return list.flatMap((a) =>
a.children?.length ? runningCalls(a.children) : a.status === 'running' ? [a] : [],
)
}
function countActions(list: Action[]): number {
return list.reduce((n, a) => n + (a.children?.length ? countActions(a.children) : 1), 0)
}
function sumDiff(list: Action[]): { added: number; removed: number } | undefined {
let added = 0
let removed = 0
let any = false
const walk = (a: Action) => {
if (a.diff) {
any = true
added += a.diff.added
removed += a.diff.removed
}
a.children?.forEach(walk)
}
list.forEach(walk)
return any ? { added, removed } : undefined
}
function fmtDuration(ms: number) {
if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`
const s = Math.round(ms / 1000)
return `${Math.floor(s / 60)}m ${String(s % 60).padStart(2, '0')}s`
}
function fmtClock(ms: number) {
const s = Math.floor(ms / 1000)
return `${Math.floor(s / 60)}:${String(s % 60).padStart(2, '0')}`
}
function fmtWorked(ms: number) {
const s = Math.max(1, Math.floor(ms / 1000))
if (s < 60) return `${s}s`
return `${Math.floor(s / 60)}m ${String(s % 60).padStart(2, '0')}s`
}
const THEME_VARS = [
'[--tl-page:#EEEEF3] dark:[--tl-page:#0E0E0F]',
'[--tl-panel:#F4F4FA] dark:[--tl-panel:#1B1B1C]',
'[--tl-well:#EEEEF3] dark:[--tl-well:#0E0E0F]',
'[--tl-raised:#DFDFE3] dark:[--tl-raised:#2D2D2E]',
'[--tl-raised-hover:#CACACD] dark:[--tl-raised-hover:#373738]',
'[--tl-border:#DFDFE3] dark:[--tl-border:#2D2D2E]',
'[--tl-border-strong:#CACACD] dark:[--tl-border-strong:#373738]',
'[--tl-hairline:#DFDFE3] dark:[--tl-hairline:#2D2D2E]',
'[--tl-rim:#CACACD] dark:[--tl-rim:#F4F4FA2E]',
'[--tl-text:#1B1B1C] dark:[--tl-text:#F4F4FA]',
'[--tl-body:#373738] dark:[--tl-body:#CACACD]',
'[--tl-muted:#575759] dark:[--tl-muted:#9B9B9E]',
'[--tl-faint:#7B7B7D]',
'[--tl-selection:#A0A0A233] dark:[--tl-selection:#5E5E6333]',
'[--tl-success:#047857] dark:[--tl-success:#34D399]',
'[--tl-ai:#0369A1] dark:[--tl-ai:#7DD3FC]',
'[--tl-attention:#B45309] dark:[--tl-attention:#FFB574]',
'[--tl-red:#C8262C] dark:[--tl-red:#E5484D]',
// Small red words: 20% toward ink on light, 35% toward white on dark, for 4.5:1.
'[--tl-red-text:color-mix(in_srgb,#C8262C,#1B1B1C_20%)] dark:[--tl-red-text:color-mix(in_srgb,#E5484D,#F4F4FA_35%)]',
'[--tl-primary:#1B1B1C] dark:[--tl-primary:#F4F4FA]',
'[--tl-on-primary:#F4F4FA] dark:[--tl-on-primary:#0E0E0F]',
'[--tl-focus:#1B1B1C99] dark:[--tl-focus:#F4F4FA99]',
'[--tl-focus-gap:#F4F4FA] dark:[--tl-focus-gap:#1B1B1C]',
'[--tl-dot:#1B1B1C] dark:[--tl-dot:#F4F4FA]',
'[--tl-elev-card:0_2px_6px_rgba(0,0,0,0.06),0_28px_56px_-16px_rgba(0,0,0,0.25)] dark:[--tl-elev-card:0_2px_6px_rgba(0,0,0,0.5),0_36px_72px_-18px_rgba(0,0,0,0.9)]',
'[--tl-elev-1:0_1px_2px_rgba(0,0,0,0.08)] dark:[--tl-elev-1:0_1px_2px_rgba(0,0,0,0.5)]',
].join(' ')
const CARD =
'relative w-full rounded-[24px] border border-(color:--tl-border) bg-(--tl-panel) p-4 min-[400px]:p-5 shadow-(--tl-elev-card)'
const WELL = 'rounded-2xl border border-(color:--tl-border) bg-(--tl-well)'
const GROUP = 'flex items-center gap-1.5 font-mono text-[11px] leading-4 text-(color:--tl-muted)'
const TITLE = 'min-w-0 truncate text-[15px] leading-6 font-semibold text-(color:--tl-text)'
const META = 'shrink-0 text-[12px] leading-4 tabular-nums text-(color:--tl-muted)'
const MONO = 'font-mono text-[12px] leading-[18px]'
const FOCUS =
'outline-none focus-visible:ring-2 focus-visible:ring-(color:--tl-focus) focus-visible:ring-offset-2 focus-visible:ring-offset-(color:--tl-focus-gap)'
// Rows sit flush in the well, so their ring draws inside the row.
const ROW_FOCUS = 'outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-(color:--tl-focus)'
const HIT = "relative pointer-coarse:after:absolute pointer-coarse:after:content-['']"
const HIT_HEAD = `${HIT} pointer-coarse:after:-inset-1.5`
const HIT_BTN = `${HIT} pointer-coarse:after:-inset-1.5`
const HIT_ABS = "pointer-coarse:after:absolute pointer-coarse:after:-inset-2 pointer-coarse:after:content-['']"
const BTN =
'inline-flex h-8 shrink-0 items-center justify-center gap-1.5 rounded-full px-4 text-[12px] leading-4 font-semibold transition-[background-color,color,border-color,box-shadow] duration-150 disabled:opacity-50'
const BTN_GHOST = `${BTN} text-(color:--tl-muted) hover:bg-(--tl-raised) hover:text-(color:--tl-text)`
type Tone = 'neutral' | 'ai' | 'attention' | 'success' | 'red'
const TONE_VAR: Record<Tone, string> = {
neutral: 'var(--tl-dot)',
ai: 'var(--tl-ai)',
attention: 'var(--tl-attention)',
success: 'var(--tl-success)',
red: 'var(--tl-red)',
}
const TONE_STRENGTH: Record<Tone, number> = { neutral: 6, ai: 14, attention: 14, success: 10, red: 12 }
const SHIMMER_BG = 'linear-gradient(90deg, var(--tl-muted) 0%, var(--tl-text) 50%, var(--tl-muted) 100%)'
/**
* @typedef {object} Action
* @property {string} id Stable action identifier that must be unique within its list.
* @property {ActionKind} kind Selects the tool icon and action treatment.
* @property {string} label Present-tense action text used while queued or running.
* @property {string} doneLabel Past-tense action text used after the action settles.
* @property {string} [target] File, query, command or URL shown after the action label; left out, no target is shown.
* @property {string} [outcome] Result summary shown at the row end; left out, no result summary is shown.
* @property {'neutral'|'success'|'failed'} [tone] Colors a settled action that did not fail; left out, the neutral treatment is used.
* @property {{added: number, removed: number}} [diff] Added and removed counts shown instead of outcome; left out, outcome is used when present.
* @property {number} [durationMs] Action duration shown after it settles; left out, no duration is shown.
* @property {ActionStatus} status Sets whether the action is queued, running, done, failed or stopped.
* @property {Record<string, string>} [input] Tool input fields shown in the expandable details; left out, no input section is shown.
* @property {string[]} [output] Tool output lines previewed in the expandable details; left out, no output section is shown.
* @property {number} [outputTotal] Total output line count used when output is a preview; left out, the supplied output length is used.
* @property {Action[]} [children] Nested actions shown beneath this action; left out, the action is rendered as a leaf.
* @property {string} [parallelGroup] Groups adjacent actions with the same value on a shared parallel rail; left out, the action is shown sequentially.
*/
/**
* @typedef {object} ToolLedgerProps
* @property {Action[]} [actions] Supplies the tool action tree; left out, host mode has no actions, while passing it turns the demo off.
* @property {RunStatus} [status] Sets the overall run state; left out, it is inferred from the actions, while passing it turns the demo off.
* @property {number} [elapsedMs] Shows the run duration in milliseconds; left out, no host duration is shown, while passing it turns the demo off.
* @property {string} [label] Adds text beside the ledger heading; left out, only the default heading is shown in host mode, while passing it turns the demo off.
* @property {string} [summary] Shows a result row after a completed run; left out, no result row is shown in host mode, while passing it turns the demo off.
* @property {boolean} [defaultCollapsed=false] Sets whether the action list starts collapsed.
* @property {(id: string, expanded: boolean) => void} [onActionToggle] Reports action detail expansion changes while expansion remains local; left out, toggles are not reported.
* @property {() => void} [onStop] Handles stopping and makes the stop control available during a host run; left out, host runs have no stop control.
* @property {string} [className] Adds classes to the outermost root; left out, only the built-in classes are used.
* @property {Partial<Tuning>} [tuning] Overrides ledger measurements, timing and motion values; left out, every value in TUNING is used.
*/
type CardProps = {
actions: Action[]
run: RunStatus
elapsed?: number
label?: string
summary?: string
defaultCollapsed: boolean
onActionToggle?: (id: string, expanded: boolean) => void
onStop?: () => void
onReplay?: () => void
reduce: boolean
t: Tuning
}
type RowState = {
open: Record<string, boolean>
full: Record<string, boolean>
toggle: (id: string) => void
toggleFull: (id: string) => void
}
// Over the header's reserved slot: 6px chevron overhang, 32px chevron, 8px right gap.
const STOP_RIGHT = 34
type Par = 'first' | 'mid' | 'last'
const OUTPUT_BOX = 'rounded-xl border border-(color:--tl-border) bg-(--tl-panel) p-3 font-mono text-[12px]'
// Ambient loops run imperatively: the card re-renders every tick and must not park them.
function useLoop(seconds: number, reduce: boolean) {
const v = useMotionValue(0)
useEffect(() => {
if (reduce) return
const a = animate(v, [0, 1], { duration: seconds, ease: 'linear', repeat: Infinity })
return () => a.stop()
}, [seconds, reduce, v])
return v
}State
- every hook, handler, effect and disposal
- the animation loop, frame by frame
Tree
- the JSX, every className and inline style
Why · Remix · Check
- the mechanism, the tuning points, the checks
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