Components

TaskList

Floating agent task progress pill above the composer that expands into the full task list.

completedDesign data model + storage for projects/tasks/pomodoro
completedAdd native notification IPC handler for session completion
activeBuilding projects sidebar and task list
pendingBuild persistent pomodoro timer bar + timer engine
pendingSet window sizing, build, validate

Composition

Expandable task progress

Trigger and item children can be omitted to use their built-in content.

<TaskList>
- <TaskListTrigger>
 - <TaskListIndicator />
 - <TaskListProgress />
 - <TaskListLabel />
 </TaskListTrigger>
- <TaskListContent>
 - <TaskListItem>
 - <TaskListIndicator />
 </TaskListItem>
 </TaskListContent>
</TaskList>

Installation

First install and activate one skin. Core deliberately contains no visual token defaults.

This agent installs from the task-list registry. Install the bundle with the command above, or inspect the source below.

Registry command

npx shadcn@latest add https://control-ui.dev/r/task-list.json

See registry manifest

Usage

"use client";

import { useChat } from "@mastra/react";

import { TaskList, TaskListContent, TaskListItem, TaskListTrigger } from "@/components/control-ui/task-list";

export function Example({ agentId }: { agentId: string }) {

const { tasks } = useChat({ agentId });

return (

<TaskList defaultOpen={false}>

<TaskListTrigger />

<TaskListContent>

{tasks.map((task) => (

<TaskListItem

key={task.id}

label={task.status === "in_progress" ? task.activeForm : task.content}

status={task.status === "in_progress" ? "active" : task.status}

/>

))}

</TaskListContent>

</TaskList>

);

}

Dependencies

CollapsiblecollapsiblePrimitive

Raw code

This agent’s owned source and private support files

src/registry/sources/control-ui/task-list.tsx

"use client";

import { ChevronRight, CircleCheck, CircleDashed, Loader2 } from "lucide-react";

import type { ComponentProps, CSSProperties, ReactNode } from "react";

import { createContext, useContext, useEffect, useId, useState } from "react";

import type { TaskListKnobStyle } from "@/components/control-ui/knob-contracts/task-list-knobs";

import { cn } from "@/components/control-ui/lib/cn";

import type { CollapsibleProps } from "@/components/control-ui/ui/collapsible";

import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/control-ui/ui/collapsible";

export type TaskStatus = "pending" | "active" | "completed";

export type TaskListProps = Omit<CollapsibleProps, "style"> & { style?: CSSProperties & TaskListKnobStyle };

type TaskListStyleProps<Props, Style> = Omit<Props, "style"> & { style?: CSSProperties & Style };

type TaskEntry = {

key: string;

status: TaskStatus;

label: string;

};

type TaskListRegistrationContextValue = {

registerTask: (entry: TaskEntry) => void;

unregisterTask: (key: string) => void;

};

type TaskListContextValue = {

total: number;

current?: TaskEntry;

/** 1-based position rendered as "Task 3 of 5"; 0 while no task is registered. */

currentNumber: number;

allCompleted: boolean;

};

const TaskListContext = createContext<TaskListContextValue | null>(null);

const TaskListRegistrationContext = createContext<TaskListRegistrationContextValue | null>(null);

function useTaskListContext() {

const context = useContext(TaskListContext);

if (!context) throw new Error("TaskList compound components must be rendered inside <TaskList>.");

return context;

}

function useTaskListRegistrationContext() {

const context = useContext(TaskListRegistrationContext);

if (!context) throw new Error("TaskList items must be rendered inside <TaskList>.");

return context;

}

function upsert(entries: TaskEntry[], entry: TaskEntry) {

const index = entries.findIndex((existing) => existing.key === entry.key);

if (index === -1) return [...entries, entry];

const next = [...entries];

next[index] = entry;

return next;

}

function currentTaskIndex(tasks: TaskEntry[]) {

const active = tasks.findIndex((task) => task.status === "active");

if (active !== -1) return active;

const pending = tasks.findIndex((task) => task.status === "pending");

if (pending !== -1) return pending;

return tasks.length - 1;

}

export function TaskList({ className, children, ...props }: TaskListProps) {

const [tasks, setTasks] = useState<TaskEntry[]>([]);

// register upserts in place so status change never reorders, and unregister runs only at item unmount —

// combined effect cleanup would move every updated item to end

const [registration] = useState<TaskListRegistrationContextValue>(() => ({

registerTask(entry) {

setTasks((previous) => upsert(previous, entry));

},

unregisterTask(key) {

setTasks((previous) => previous.filter((task) => task.key !== key));

},

}));

const total = tasks.length;

const currentIndex = currentTaskIndex(tasks);

const current = tasks[currentIndex];

const allCompleted = total > 0 && tasks.every((task) => task.status === "completed");

return (

<TaskListRegistrationContext.Provider value={registration}>

      <TaskListContext.Provider value={{ total, current, currentNumber: total === 0 ? 0 : currentIndex + 1, allCompleted }}>

<Collapsible

data-control-ui="task-list"

data-control-family="task-list"

data-slot="root"

data-surface="panel"

className={cn("w-full overflow-hidden", className)}

{...props}

>

{children}

</Collapsible>

</TaskListContext.Provider>

</TaskListRegistrationContext.Provider>

);

}

export type TaskListTriggerProps = TaskListStyleProps<ComponentProps<"button">, TaskListKnobStyle>;

export function TaskListTrigger({ className, children, ...props }: TaskListTriggerProps) {

const { allCompleted } = useTaskListContext();

return (

<CollapsibleTrigger

data-control-ui="task-list"

data-control-family="task-list"

data-slot="trigger"

className={cn("flex w-full items-center", className)}

{...props}

>

{children ?? (

<>

<TaskListIndicator status={allCompleted ? "completed" : "active"} />

<TaskListProgress />

<ChevronRight

aria-hidden="true"

data-control-ui="task-list"

data-control-family="task-list"

data-slot="chevron"

className="shrink-0"

/>

{/* expanded list already shows current task, so pill's preview hides while open */}

<TaskListLabel className="in-data-[state=open]:hidden" />

</>

)}

</CollapsibleTrigger>

);

}

export type TaskListProgressProps = TaskListStyleProps<ComponentProps<"span">, TaskListKnobStyle>;

export function TaskListProgress({ className, children, ...props }: TaskListProgressProps) {

const { currentNumber, total } = useTaskListContext();

return (

    <span data-control-ui="task-list" data-control-family="task-list" data-slot="progress" className={cn("shrink-0", className)} {...props}>

{children ?? `Task ${currentNumber} of ${total}`}

);

}

export type TaskListLabelProps = TaskListStyleProps<ComponentProps<"span">, TaskListKnobStyle>;

export function TaskListLabel({ className, children, ...props }: TaskListLabelProps) {

const { current } = useTaskListContext();

return (

<span

data-control-ui="task-list"

data-control-family="task-list"

data-slot="label"

className={cn("min-w-0 flex-1 truncate", className)}

{...props}

>

{children ?? current?.label}

);

}

export type TaskListContentProps = ComponentProps<"ol"> & { style?: CSSProperties & TaskListKnobStyle };

export function TaskListContent({ className, children, ...props }: TaskListContentProps) {

return (

// closed items must stay registered — collapsed pill derives "Task 3 of 5" from them

<CollapsibleContent keepMounted>

<ol

data-control-ui="task-list"

data-control-family="task-list"

data-slot="items"

className={cn("flex flex-col", className)}

{...props}

>

{children}

</ol>

</CollapsibleContent>

);

}

export type TaskListItemProps = TaskListStyleProps<Omit<ComponentProps<"li">, "children">, TaskListKnobStyle> & {

label: string;

status?: TaskStatus;

children?: ReactNode;

};

export function TaskListItem({ label, status = "pending", className, children, ...props }: TaskListItemProps) {

const { registerTask, unregisterTask } = useTaskListRegistrationContext();

const key = useId();

useEffect(() => registerTask({ key, status, label }), [registerTask, key, status, label]);

useEffect(() => () => unregisterTask(key), [unregisterTask, key]);

return (

<li

data-control-ui="task-list"

data-control-family="task-list"

data-slot="item"

data-status={status}

className={cn("flex items-center", className)}

{...props}

>

<TaskListIndicator status={status} />

{children ?? label}

</li>

);

}

const indicatorIcons = {

pending: CircleDashed,

active: Loader2,

completed: CircleCheck,

} as const;

export type TaskListIndicatorProps = TaskListStyleProps<ComponentProps<"span">, TaskListKnobStyle> & {

status?: TaskStatus;

};

export function TaskListIndicator({ status = "pending", className, ...props }: TaskListIndicatorProps) {

const Icon = indicatorIcons[status];

return (

<span

data-control-ui="task-list"

data-control-family="task-list"

data-slot="item-indicator"

data-status={status}

className={cn("inline-flex shrink-0 items-center justify-center", className)}

{...props}

>

{/* loader, not expressive motion — like Spinner it keeps turning under reduced motion */}

<Icon aria-hidden="true" className="size-3.5" />

{status}

);

}

Knobs

Typed custom properties the recipe paints with. Set one on the root — style, a utility class, or a skin — and every slot inherits it.

--cui-task-list-* · 14 knobsHow the cascade resolves

--cui-task-list-radius<length>var(--radius-field)

--cui-task-list-ring-color<color>oklch(from var(--foreground) l c h / 0.04)

--cui-task-list-items-padding<length>calc(var(--spacing) * 2)

--cui-task-list-item-radius<length>

max(
      var(--radius-sm),
      min(var(--radius-popup-item-fit), calc(var(--cui-task-list-radius) - var(--cui-task-list-items-padding)))
    )

--cui-task-list-trigger-hover-background<color>oklch(from var(--muted) l c h / 0.4)

--cui-task-list-background<color>oklch(from var(--card) l c h / 0.9)

--cui-task-list-foreground<color>var(--foreground)

--cui-task-list-border-color<color>var(--border)

--cui-task-list-border-width<length>var(--control-rim-width)

--cui-task-list-shadow*var(--shadow-md)

--cui-task-list-item-foreground<color>var(--foreground)

--cui-task-list-item-pending-foreground<color>var(--muted-foreground)

--cui-task-list-indicator-foreground<color>oklch(from var(--muted-foreground) l c h / 0.7)

--cui-task-list-indicator-active-foreground<color>var(--primary-text)