diff --git a/src/lib/sessionSchema/index.ts b/src/lib/sessionSchema/index.ts
index ceb5657..4a072f4 100644
--- a/src/lib/sessionSchema/index.ts
+++ b/src/lib/sessionSchema/index.ts
@@ -97,15 +97,6 @@ export const toPayload = async (server: CoralServer, data: z.output<FormSchema>)
 	} satisfies CreateSessionRequest;
 };
 
-// export const defaultPayload = {
-// 	groups: [],
-// 	tools: {},
-// 	sessionRuntimeSettings: {
-// 		ttl: 50000
-// 	},
-// 	agents: []
-// } satisfies CreateSessionRequest;
-
 export const defaultProvider = {
 	runtime: 'executable',
 	remote_request: {
@@ -139,14 +130,11 @@ export const importFromPayload = (json: string): z.output<FormSchema> => {
 			];
 		})
 	);
-	const defaultRuntimeSettings = {
-		ttl: 50000
-	};
+
 	return {
 		tools,
 		groups: data.agentGraphRequest.groups ?? [],
 		sessionRuntimeSettings: {
-			...defaultRuntimeSettings,
 			...(data.execution && data.execution.mode === 'immediate'
 				? data.execution.runtimeSettings
 				: {})
diff --git a/src/lib/sessionSchema/types.ts b/src/lib/sessionSchema/types.ts
index 7c88bac..864dd2f 100644
--- a/src/lib/sessionSchema/types.ts
+++ b/src/lib/sessionSchema/types.ts
@@ -222,7 +222,7 @@ export type CustomTool = z.output<typeof CustomToolSchema>;
 
 const formSchema = z.object({
 	sessionRuntimeSettings: z.object({
-		ttl: z.number().min(10000).max(15778476000).default(900000)
+		ttl: z.number().min(10000).max(15778476000).optional()
 	}),
 	sessionBudgetSettings: z.object({
 		budget: z.number().min(10000).default(100000000),
diff --git a/src/routes/(app)/workbench/options/DurationInout.svelte b/src/routes/(app)/workbench/options/DurationInout.svelte
new file mode 100644
index 0000000..3bb6032
--- /dev/null
+++ b/src/routes/(app)/workbench/options/DurationInout.svelte
@@ -0,0 +1,140 @@
+<script lang="ts">
+	import * as ButtonGroup from '@coral-os/component-library/ui/button-group/index.js';
+	import * as InputGroup from '@coral-os/component-library/ui/input-group/index.js';
+	import * as Label from '@coral-os/component-library/ui/label/index.js';
+	import { tick } from 'svelte';
+
+	interface Props {
+		value: number;
+		disabled?: boolean;
+		onchange?: (totalMilliseconds: number) => void;
+	}
+
+	let { value, disabled = false, onchange }: Props = $props();
+
+	const toHMS = (totalMs: number) => {
+		const totalSeconds = Math.floor(totalMs / 1000);
+		return {
+			h: Math.floor(totalSeconds / 3600),
+			m: Math.floor((totalSeconds % 3600) / 60),
+			s: totalSeconds % 60
+		};
+	};
+
+	const toSeconds = (h: number, m: number, s: number) =>
+		(h * 3600 + Math.min(m, 59) * 60 + Math.min(s, 59)) * 1000;
+
+	const pad = (n: number) => String(n).padStart(2, '0');
+	const parseSegment = (v: string) => {
+		const n = parseInt(v.replace(/\D/g, ''), 10);
+		return isNaN(n) ? 0 : n;
+	};
+
+	let isEditingH = $state(false);
+	let isEditingM = $state(false);
+	let isEditingS = $state(false);
+	let editH = $state('');
+	let editM = $state('');
+	let editS = $state('');
+
+	const hms = $derived(toHMS(value ?? 0));
+
+	async function onFocusSegment(
+		e: FocusEvent & { currentTarget: HTMLInputElement },
+		segment: 'h' | 'm' | 's'
+	) {
+		if (segment === 'h') {
+			isEditingH = true;
+			editH = String(hms.h);
+		}
+		if (segment === 'm') {
+			isEditingM = true;
+			editM = String(hms.m);
+		}
+		if (segment === 's') {
+			isEditingS = true;
+			editS = String(hms.s);
+		}
+		await tick();
+		e.currentTarget.select();
+	}
+
+	function onBlurSegment(
+		e: FocusEvent & { currentTarget: HTMLInputElement },
+		segment: 'h' | 'm' | 's'
+	) {
+		const raw = parseSegment(e.currentTarget.value);
+		if (segment === 'h') {
+			isEditingH = false;
+		}
+		if (segment === 'm') {
+			isEditingM = false;
+		}
+		if (segment === 's') {
+			isEditingS = false;
+		}
+		const { h, m, s } = hms;
+		const next = {
+			h: segment === 'h' ? raw : h,
+			m: segment === 'm' ? raw : m,
+			s: segment === 's' ? raw : s
+		};
+		onchange?.(toSeconds(next.h, next.m, next.s));
+	}
+</script>
+
+<ButtonGroup.Root class="grow">
+	<!-- Hours -->
+	<ButtonGroup.Text>
+		<Label.Root>Hours</Label.Root>
+	</ButtonGroup.Text>
+	<InputGroup.Root>
+		<InputGroup.Input
+			value={isEditingH ? editH : String(hms.h)}
+			onfocus={(e) => onFocusSegment(e, 'h')}
+			onblur={(e) => onBlurSegment(e, 'h')}
+			oninput={(e) => (editH = e.currentTarget.value)}
+			{disabled}
+			placeholder="0"
+			maxlength={4}
+			inputmode="numeric"
+			type="text"
+		/>
+	</InputGroup.Root>
+
+	<!-- Minutes -->
+	<ButtonGroup.Text>
+		<Label.Root>Minutes</Label.Root>
+	</ButtonGroup.Text>
+	<InputGroup.Root>
+		<InputGroup.Input
+			value={isEditingM ? editM : pad(hms.m)}
+			onfocus={(e) => onFocusSegment(e, 'm')}
+			onblur={(e) => onBlurSegment(e, 'm')}
+			oninput={(e) => (editM = e.currentTarget.value)}
+			{disabled}
+			placeholder="00"
+			maxlength={2}
+			inputmode="numeric"
+			type="text"
+		/>
+	</InputGroup.Root>
+
+	<!-- Seconds -->
+	<ButtonGroup.Text>
+		<Label.Root>Seconds</Label.Root>
+	</ButtonGroup.Text>
+	<InputGroup.Root>
+		<InputGroup.Input
+			value={isEditingS ? editS : pad(hms.s)}
+			onfocus={(e) => onFocusSegment(e, 's')}
+			onblur={(e) => onBlurSegment(e, 's')}
+			oninput={(e) => (editS = e.currentTarget.value)}
+			{disabled}
+			placeholder="00"
+			maxlength={2}
+			inputmode="numeric"
+			type="text"
+		/>
+	</InputGroup.Root>
+</ButtonGroup.Root>
diff --git a/src/routes/(app)/workbench/panes/SessionPane.svelte b/src/routes/(app)/workbench/panes/SessionPane.svelte
index 9816941..d449b15 100644
--- a/src/routes/(app)/workbench/panes/SessionPane.svelte
+++ b/src/routes/(app)/workbench/panes/SessionPane.svelte
@@ -29,6 +29,7 @@
 	import { randomAdjective, randomAnimal } from '$lib/words';
 	import { getSessionContext } from '$lib/sessionCreatorContext';
 	import { cn } from '$lib/utils';
+	import DurationInout from '../options/DurationInout.svelte';
 
 	let ctx = getSessionContext();
 
@@ -48,7 +49,7 @@
 
 {#if ctx && $formData}
 	<section class="flex h-full min-h-0 grow flex-col gap-2 overflow-y-auto p-4">
-		<p>Time to live restricts how long a session can remain alive and open for.</p>
+		<p>If specified, the session will never live longer than this duration.</p>
 		<Form.ElementField {form} name="sessionRuntimeSettings.ttl" class="flex items-center gap-2 ">
 			<Form.Control>
 				{#snippet children({ props })}
@@ -56,30 +57,28 @@
 						title="Time to live (TTL)"
 						tooltip="Measured in milliseconds, the time to live is the maximum duration the session can last"
 						extra={{
-							required: true,
 							type: 'number'
 						}}
 						class="max-w-1/4 min-w-1/4"
 					>
 						Time to live
 					</TooltipLabel>
-					<Input
-						{...props}
-						bind:value={$formData.sessionRuntimeSettings.ttl}
-						placeholder="time in milliseconds"
-						maxlength={15778476000}
-						type="number"
-						class="grow"
+
+					<DurationInout
+						value={$formData.sessionRuntimeSettings.ttl ?? 0}
+						onchange={(totalMilliseconds) => {
+							if (totalMilliseconds === 0) {
+								delete $formData.sessionRuntimeSettings.ttl;
+								$formData.sessionBudgetSettings = $formData.sessionBudgetSettings;
+							} else {
+								$formData.sessionRuntimeSettings.ttl = totalMilliseconds;
+							}
+						}}
 					/>
 				{/snippet}
 			</Form.Control>
 		</Form.ElementField>
-		<span class="text-muted-foreground flex flex-col justify-between">
-			<TooltipLabel tooltip="Based off Session time to live settings" class=" max-w-fit">
-				Maximum session duration: {formatMsToHHMMSS($formData.sessionRuntimeSettings.ttl ?? 0) ??
-					'HH:MM:SS'}
-			</TooltipLabel>
-		</span>
+
 		{#if $errors?.sessionRuntimeSettings?.ttl && JSON.stringify($errors.sessionRuntimeSettings?.ttl) !== '{}' && JSON.stringify($errors.sessionRuntimeSettings?.ttl) !== '{}'}
 			<span class="text-xs">
 				{$errors?.sessionRuntimeSettings?.ttl}