From d6cb9b49b71db3bb93dc730f6316c8ed17529e5a Mon Sep 17 00:00:00 2001
From: Jaayden Halko <jaayden.halko@gmail.com>
Date: Fri, 16 May 2025 23:05:33 +0100
Subject: [PATCH] feat: setup url autofill for dynamic parameters (#17739)

resolves coder/preview#80

Parameter autofill allows setting parameters from the url using the
format param.[param name]=["purple","green"]

Example:

http://localhost:8080/templates/coder/scratch/workspace?param.list=%5b%22purple%22%2c%22green%22%5d%0a

The goal is to maintain feature parity of for autofill with dynamic
parameters.

Note: user history autofill is no longer being used and is being
removed.
---
 site/src/components/Select/Select.tsx         |   7 +-
 .../DynamicParameter/DynamicParameter.tsx     | 316 ++++++++++++------
 .../CreateWorkspacePageExperimental.tsx       | 101 ++++--
 .../CreateWorkspacePageViewExperimental.tsx   |  44 +--
 4 files changed, 308 insertions(+), 160 deletions(-)

diff --git a/site/src/components/Select/Select.tsx b/site/src/components/Select/Select.tsx
index 43839d9a00..3d2f8ffc3b 100644
--- a/site/src/components/Select/Select.tsx
+++ b/site/src/components/Select/Select.tsx
@@ -15,10 +15,13 @@ export const SelectValue = SelectPrimitive.Value;
 
 export const SelectTrigger = React.forwardRef<
 	React.ElementRef<typeof SelectPrimitive.Trigger>,
-	React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
->(({ className, children, ...props }, ref) => (
+	React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger> & {
+		id?: string;
+	}
+>(({ className, children, id, ...props }, ref) => (
 	<SelectPrimitive.Trigger
 		ref={ref}
+		id={id}
 		className={cn(
 			`flex h-10 w-full font-medium items-center justify-between whitespace-nowrap rounded-md
 			border border-border border-solid bg-transparent px-3 py-2 text-sm shadow-sm
diff --git a/site/src/modules/workspaces/DynamicParameter/DynamicParameter.tsx b/site/src/modules/workspaces/DynamicParameter/DynamicParameter.tsx
index a41dcf352f..cbc7852bd1 100644
--- a/site/src/modules/workspaces/DynamicParameter/DynamicParameter.tsx
+++ b/site/src/modules/workspaces/DynamicParameter/DynamicParameter.tsx
@@ -32,23 +32,29 @@ import {
 	TooltipProvider,
 	TooltipTrigger,
 } from "components/Tooltip/Tooltip";
-import { Info, Settings, TriangleAlert } from "lucide-react";
-import { type FC, useEffect, useId, useState } from "react";
+import { useDebouncedValue } from "hooks/debounce";
+import { useEffectEvent } from "hooks/hookPolyfills";
+import { Info, LinkIcon, Settings, TriangleAlert } from "lucide-react";
+import { type FC, useEffect, useId, useRef, useState } from "react";
 import type { AutofillBuildParameter } from "utils/richParameters";
 import * as Yup from "yup";
 
 export interface DynamicParameterProps {
 	parameter: PreviewParameter;
+	value?: string;
 	onChange: (value: string) => void;
 	disabled?: boolean;
 	isPreset?: boolean;
+	autofill: boolean;
 }
 
 export const DynamicParameter: FC<DynamicParameterProps> = ({
 	parameter,
+	value,
 	onChange,
 	disabled,
 	isPreset,
+	autofill = false,
 }) => {
 	const id = useId();
 
@@ -57,14 +63,31 @@ export const DynamicParameter: FC<DynamicParameterProps> = ({
 			className="flex flex-col gap-2"
 			data-testid={`parameter-field-${parameter.name}`}
 		>
-			<ParameterLabel parameter={parameter} isPreset={isPreset} />
+			<ParameterLabel
+				id={id}
+				parameter={parameter}
+				isPreset={isPreset}
+				autofill={autofill}
+			/>
 			<div className="max-w-lg">
-				<ParameterField
-					parameter={parameter}
-					onChange={onChange}
-					disabled={disabled}
-					id={id}
-				/>
+				{parameter.form_type === "input" ||
+				parameter.form_type === "textarea" ? (
+					<DebouncedParameterField
+						id={id}
+						parameter={parameter}
+						value={value}
+						onChange={onChange}
+						disabled={disabled}
+					/>
+				) : (
+					<ParameterField
+						id={id}
+						parameter={parameter}
+						value={value}
+						onChange={onChange}
+						disabled={disabled}
+					/>
+				)}
 			</div>
 			{parameter.diagnostics.length > 0 && (
 				<ParameterDiagnostics diagnostics={parameter.diagnostics} />
@@ -76,10 +99,16 @@ export const DynamicParameter: FC<DynamicParameterProps> = ({
 interface ParameterLabelProps {
 	parameter: PreviewParameter;
 	isPreset?: boolean;
+	autofill: boolean;
+	id: string;
 }
 
-const ParameterLabel: FC<ParameterLabelProps> = ({ parameter, isPreset }) => {
-	const hasDescription = parameter.description && parameter.description !== "";
+const ParameterLabel: FC<ParameterLabelProps> = ({
+	parameter,
+	isPreset,
+	autofill,
+	id,
+}) => {
 	const displayName = parameter.display_name
 		? parameter.display_name
 		: parameter.name;
@@ -95,7 +124,10 @@ const ParameterLabel: FC<ParameterLabelProps> = ({ parameter, isPreset }) => {
 			)}
 
 			<div className="flex flex-col w-full gap-1">
-				<Label className="flex gap-2 flex-wrap text-sm font-medium">
+				<Label
+					htmlFor={id}
+					className="flex gap-2 flex-wrap text-sm font-medium"
+				>
 					<span className="flex">
 						{displayName}
 						{parameter.required && (
@@ -137,9 +169,26 @@ const ParameterLabel: FC<ParameterLabelProps> = ({ parameter, isPreset }) => {
 							</Tooltip>
 						</TooltipProvider>
 					)}
+					{autofill && (
+						<TooltipProvider delayDuration={100}>
+							<Tooltip>
+								<TooltipTrigger asChild>
+									<span className="flex items-center">
+										<Badge size="sm">
+											<LinkIcon />
+											URL Autofill
+										</Badge>
+									</span>
+								</TooltipTrigger>
+								<TooltipContent className="max-w-xs">
+									Autofilled from the URL
+								</TooltipContent>
+							</Tooltip>
+						</TooltipProvider>
+					)}
 				</Label>
 
-				{hasDescription && (
+				{Boolean(parameter.description) && (
 					<div className="text-content-secondary">
 						<MemoizedMarkdown className="text-xs">
 							{parameter.description}
@@ -151,8 +200,96 @@ const ParameterLabel: FC<ParameterLabelProps> = ({ parameter, isPreset }) => {
 	);
 };
 
+interface DebouncedParameterFieldProps {
+	parameter: PreviewParameter;
+	value?: string;
+	onChange: (value: string) => void;
+	disabled?: boolean;
+	id: string;
+}
+
+const DebouncedParameterField: FC<DebouncedParameterFieldProps> = ({
+	parameter,
+	value,
+	onChange,
+	disabled,
+	id,
+}) => {
+	const [localValue, setLocalValue] = useState(
+		value !== undefined ? value : validValue(parameter.value),
+	);
+	const debouncedLocalValue = useDebouncedValue(localValue, 500);
+	const onChangeEvent = useEffectEvent(onChange);
+	// prevDebouncedValueRef is to prevent calling the onChangeEvent on the initial render
+	const prevDebouncedValueRef = useRef<string | undefined>();
+
+	useEffect(() => {
+		if (prevDebouncedValueRef.current !== undefined) {
+			onChangeEvent(debouncedLocalValue);
+		}
+
+		prevDebouncedValueRef.current = debouncedLocalValue;
+	}, [debouncedLocalValue, onChangeEvent]);
+
+	switch (parameter.form_type) {
+		case "textarea":
+			return (
+				<Textarea
+					id={id}
+					className="max-w-2xl"
+					value={localValue}
+					onChange={(e) => {
+						const target = e.currentTarget;
+						target.style.height = "auto";
+						target.style.maxHeight = "700px";
+						target.style.height = `${target.scrollHeight}px`;
+
+						setLocalValue(e.target.value);
+					}}
+					disabled={disabled}
+					placeholder={parameter.styling?.placeholder}
+					required={parameter.required}
+				/>
+			);
+
+		case "input": {
+			const inputType = parameter.type === "number" ? "number" : "text";
+			const inputProps: Record<string, unknown> = {};
+
+			if (parameter.type === "number") {
+				const validations = parameter.validations[0] || {};
+				const { validation_min, validation_max } = validations;
+
+				if (validation_min !== null) {
+					inputProps.min = validation_min;
+				}
+
+				if (validation_max !== null) {
+					inputProps.max = validation_max;
+				}
+			}
+
+			return (
+				<Input
+					id={id}
+					type={inputType}
+					value={localValue}
+					onChange={(e) => {
+						setLocalValue(e.target.value);
+					}}
+					disabled={disabled}
+					required={parameter.required}
+					placeholder={parameter.styling?.placeholder}
+					{...inputProps}
+				/>
+			);
+		}
+	}
+};
+
 interface ParameterFieldProps {
 	parameter: PreviewParameter;
+	value?: string;
 	onChange: (value: string) => void;
 	disabled?: boolean;
 	id: string;
@@ -160,17 +297,11 @@ interface ParameterFieldProps {
 
 const ParameterField: FC<ParameterFieldProps> = ({
 	parameter,
+	value,
 	onChange,
 	disabled,
 	id,
 }) => {
-	const value = validValue(parameter.value);
-	const [localValue, setLocalValue] = useState(value);
-
-	useEffect(() => {
-		setLocalValue(value);
-	}, [value]);
-
 	switch (parameter.form_type) {
 		case "dropdown":
 			return (
@@ -180,7 +311,7 @@ const ParameterField: FC<ParameterFieldProps> = ({
 					disabled={disabled}
 					required={parameter.required}
 				>
-					<SelectTrigger>
+					<SelectTrigger id={id}>
 						<SelectValue
 							placeholder={parameter.styling?.placeholder || "Select option"}
 						/>
@@ -196,7 +327,15 @@ const ParameterField: FC<ParameterFieldProps> = ({
 			);
 
 		case "multi-select": {
-			const values = parseStringArrayValue(value);
+			const parsedValues = parseStringArrayValue(value ?? "");
+
+			if (parsedValues.error) {
+				return (
+					<p className="text-sm text-content-destructive">
+						{parsedValues.error}
+					</p>
+				);
+			}
 
 			// Map parameter options to MultiSelectCombobox options format
 			const options: Option[] = parameter.options.map((opt) => ({
@@ -209,7 +348,7 @@ const ParameterField: FC<ParameterFieldProps> = ({
 				parameter.options.map((opt) => [opt.value.value, opt.name]),
 			);
 
-			const selectedOptions: Option[] = values.map((val) => {
+			const selectedOptions: Option[] = parsedValues.values.map((val) => {
 				return {
 					value: val,
 					label: optionMap.get(val) || val,
@@ -220,7 +359,7 @@ const ParameterField: FC<ParameterFieldProps> = ({
 			return (
 				<MultiSelectCombobox
 					inputProps={{
-						id: `${id}-${parameter.name}`,
+						id: id,
 					}}
 					options={options}
 					defaultOptions={selectedOptions}
@@ -241,13 +380,21 @@ const ParameterField: FC<ParameterFieldProps> = ({
 		}
 
 		case "tag-select": {
-			const values = parseStringArrayValue(value);
+			const parsedValues = parseStringArrayValue(value ?? "");
+
+			if (parsedValues.error) {
+				return (
+					<p className="text-sm text-content-destructive">
+						{parsedValues.error}
+					</p>
+				);
+			}
 
 			return (
 				<TagInput
-					id={parameter.name}
+					id={id}
 					label={parameter.display_name || parameter.name}
-					values={values}
+					values={parsedValues.values}
 					onChange={(values) => {
 						onChange(JSON.stringify(values));
 					}}
@@ -258,6 +405,7 @@ const ParameterField: FC<ParameterFieldProps> = ({
 		case "switch":
 			return (
 				<Switch
+					id={id}
 					checked={value === "true"}
 					onCheckedChange={(checked) => {
 						onChange(checked ? "true" : "false");
@@ -293,14 +441,14 @@ const ParameterField: FC<ParameterFieldProps> = ({
 			return (
 				<div className="flex items-center space-x-2">
 					<Checkbox
-						id={parameter.name}
+						id={id}
 						checked={value === "true"}
 						onCheckedChange={(checked) => {
 							onChange(checked ? "true" : "false");
 						}}
 						disabled={disabled}
 					/>
-					<Label htmlFor={parameter.name}>{parameter.styling?.label}</Label>
+					<Label htmlFor={id}>{parameter.styling?.label}</Label>
 				</div>
 			);
 
@@ -308,10 +456,10 @@ const ParameterField: FC<ParameterFieldProps> = ({
 			return (
 				<div className="flex flex-row items-baseline gap-3">
 					<Slider
+						id={id}
 						className="mt-2"
-						value={[Number(localValue ?? 0)]}
+						value={[Number(value)]}
 						onValueChange={([value]) => {
-							setLocalValue(value.toString());
 							onChange(value.toString());
 						}}
 						min={parameter.validations[0]?.validation_min ?? 0}
@@ -321,77 +469,32 @@ const ParameterField: FC<ParameterFieldProps> = ({
 					<span className="w-4 font-medium">{parameter.value.value}</span>
 				</div>
 			);
-
-		case "textarea":
-			return (
-				<Textarea
-					className="max-w-2xl"
-					value={localValue}
-					onChange={(e) => {
-						setLocalValue(e.target.value);
-						onChange(e.target.value);
-					}}
-					onInput={(e) => {
-						const target = e.currentTarget;
-						target.style.maxHeight = "700px";
-						target.style.height = `${target.scrollHeight}px`;
-					}}
-					disabled={disabled}
-					placeholder={parameter.styling?.placeholder}
-					required={parameter.required}
-				/>
-			);
-
-		case "input": {
-			const inputType = parameter.type === "number" ? "number" : "text";
-			const inputProps: Record<string, unknown> = {};
-
-			if (parameter.type === "number") {
-				const validations = parameter.validations[0] || {};
-				const { validation_min, validation_max } = validations;
-
-				if (validation_min !== null) {
-					inputProps.min = validation_min;
-				}
-
-				if (validation_max !== null) {
-					inputProps.max = validation_max;
-				}
-			}
-
-			return (
-				<Input
-					type={inputType}
-					value={localValue}
-					onChange={(e) => {
-						setLocalValue(e.target.value);
-						onChange(e.target.value);
-					}}
-					disabled={disabled}
-					required={parameter.required}
-					placeholder={parameter.styling?.placeholder}
-					{...inputProps}
-				/>
-			);
-		}
 	}
 };
 
-const parseStringArrayValue = (value: string): string[] => {
-	let values: string[] = [];
+type ParsedValues = {
+	values: string[];
+	error: string;
+};
+
+const parseStringArrayValue = (value: string): ParsedValues => {
+	const parsedValues: ParsedValues = {
+		values: [],
+		error: "",
+	};
 
 	if (value) {
 		try {
 			const parsed = JSON.parse(value);
 			if (Array.isArray(parsed)) {
-				values = parsed;
+				parsedValues.values = parsed;
 			}
 		} catch (e) {
-			console.error("Error parsing parameter of type list(string)", e);
+			parsedValues.error = `Error parsing parameter of type list(string), ${e}`;
 		}
 	}
 
-	return values;
+	return parsedValues;
 };
 
 interface OptionDisplayProps {
@@ -469,14 +572,12 @@ export const getInitialParameterValues = (
 			({ name }) => name === parameter.name,
 		);
 
+		const useAutofill =
+			autofillParam?.value && isValidParameterOption(parameter, autofillParam);
+
 		return {
 			name: parameter.name,
-			value:
-				autofillParam &&
-				isValidParameterOption(parameter, autofillParam) &&
-				autofillParam.value
-					? autofillParam.value
-					: validValue(parameter.value),
+			value: useAutofill ? autofillParam.value : validValue(parameter.value),
 		};
 	});
 };
@@ -489,6 +590,28 @@ const isValidParameterOption = (
 	previewParam: PreviewParameter,
 	buildParam: WorkspaceBuildParameter,
 ) => {
+	// multi-select is the only list(string) type with options
+	if (previewParam.form_type === "multi-select") {
+		let values: string[] = [];
+		try {
+			const parsed = JSON.parse(buildParam.value);
+			if (Array.isArray(parsed)) {
+				values = parsed;
+			}
+		} catch (e) {
+			return false;
+		}
+
+		if (previewParam.options.length > 0) {
+			const validValues = previewParam.options.map(
+				(option) => option.value.value,
+			);
+			return values.some((value) => validValues.includes(value));
+		}
+		return false;
+	}
+
+	// For parameters with options (dropdown, radio)
 	if (previewParam.options.length > 0) {
 		const validValues = previewParam.options.map(
 			(option) => option.value.value,
@@ -496,7 +619,8 @@ const isValidParameterOption = (
 		return validValues.includes(buildParam.value);
 	}
 
-	return false;
+	// For parameters without options (input,textarea,switch,checkbox,tag-select)
+	return true;
 };
 
 export const useValidationSchemaForDynamicParameters = (
diff --git a/site/src/pages/CreateWorkspacePage/CreateWorkspacePageExperimental.tsx b/site/src/pages/CreateWorkspacePage/CreateWorkspacePageExperimental.tsx
index ae31ab2503..e260e030a3 100644
--- a/site/src/pages/CreateWorkspacePage/CreateWorkspacePageExperimental.tsx
+++ b/site/src/pages/CreateWorkspacePage/CreateWorkspacePageExperimental.tsx
@@ -1,3 +1,4 @@
+import { API } from "api/api";
 import { type ApiErrorResponse, DetailedError } from "api/errors";
 import { checkAuthorization } from "api/queries/authCheck";
 import {
@@ -9,11 +10,13 @@ import { autoCreateWorkspace, createWorkspace } from "api/queries/workspaces";
 import type {
 	DynamicParametersRequest,
 	DynamicParametersResponse,
+	PreviewParameter,
 	Workspace,
 } from "api/typesGenerated";
 import { Loader } from "components/Loader/Loader";
 import { useAuthenticated } from "hooks";
 import { useEffectEvent } from "hooks/hookPolyfills";
+import { getInitialParameterValues } from "modules/workspaces/DynamicParameter/DynamicParameter";
 import { generateWorkspaceName } from "modules/workspaces/generateWorkspaceName";
 import {
 	type FC,
@@ -29,13 +32,13 @@ import { useNavigate, useParams, useSearchParams } from "react-router-dom";
 import { pageTitle } from "utils/page";
 import type { AutofillBuildParameter } from "utils/richParameters";
 import { CreateWorkspacePageViewExperimental } from "./CreateWorkspacePageViewExperimental";
-const createWorkspaceModes = ["form", "auto", "duplicate"] as const;
-export type CreateWorkspaceMode = (typeof createWorkspaceModes)[number];
-import { API } from "api/api";
 import {
 	type CreateWorkspacePermissions,
 	createWorkspaceChecks,
 } from "./permissions";
+
+const createWorkspaceModes = ["form", "auto", "duplicate"] as const;
+export type CreateWorkspaceMode = (typeof createWorkspaceModes)[number];
 export type ExternalAuthPollingState = "idle" | "polling" | "abandoned";
 
 const CreateWorkspacePageExperimental: FC = () => {
@@ -45,11 +48,12 @@ const CreateWorkspacePageExperimental: FC = () => {
 	const navigate = useNavigate();
 	const [searchParams] = useSearchParams();
 
-	const [currentResponse, setCurrentResponse] =
+	const [latestResponse, setLatestResponse] =
 		useState<DynamicParametersResponse | null>(null);
-	const [wsResponseId, setWSResponseId] = useState<number>(-1);
+	const wsResponseId = useRef<number>(-1);
 	const ws = useRef<WebSocket | null>(null);
 	const [wsError, setWsError] = useState<Error | null>(null);
+	const initialParamsSentRef = useRef(false);
 
 	const customVersionId = searchParams.get("version") ?? undefined;
 	const defaultName = searchParams.get("name");
@@ -84,15 +88,61 @@ const CreateWorkspacePageExperimental: FC = () => {
 	const realizedVersionId =
 		customVersionId ?? templateQuery.data?.active_version_id;
 
-	const onMessage = useCallback((response: DynamicParametersResponse) => {
-		setCurrentResponse((prev) => {
-			if (prev?.id === response.id) {
-				return prev;
-			}
-			return response;
-		});
+	const autofillParameters = getAutofillParameters(searchParams);
+
+	const sendMessage = useCallback((formValues: Record<string, string>) => {
+		const request: DynamicParametersRequest = {
+			id: wsResponseId.current + 1,
+			inputs: formValues,
+		};
+		if (ws.current && ws.current.readyState === WebSocket.OPEN) {
+			ws.current.send(JSON.stringify(request));
+			wsResponseId.current = wsResponseId.current + 1;
+		}
 	}, []);
 
+	// On sends all initial parameter values to the websocket
+	// (including defaults and autofilled from the url)
+	// This ensures the backend has the complete initial state of the form,
+	// which is vital for correctly rendering dynamic UI elements where parameter visibility
+	// or options might depend on the initial values of other parameters.
+	const sendInitialParameters = useEffectEvent(
+		(parameters: PreviewParameter[]) => {
+			if (initialParamsSentRef.current) return;
+			if (parameters.length === 0) return;
+
+			const initialFormValues = getInitialParameterValues(
+				parameters,
+				autofillParameters,
+			);
+			if (initialFormValues.length === 0) return;
+
+			const initialParamsToSend: Record<string, string> = {};
+			for (const param of initialFormValues) {
+				if (param.name && param.value) {
+					initialParamsToSend[param.name] = param.value;
+				}
+			}
+
+			if (Object.keys(initialParamsToSend).length === 0) return;
+
+			sendMessage(initialParamsToSend);
+			initialParamsSentRef.current = true;
+		},
+	);
+
+	const onMessage = useEffectEvent((response: DynamicParametersResponse) => {
+		if (latestResponse && latestResponse?.id >= response.id) {
+			return;
+		}
+
+		if (!initialParamsSentRef.current && response.parameters.length > 0) {
+			sendInitialParameters([...response.parameters]);
+		}
+
+		setLatestResponse(response);
+	});
+
 	// Initialize the WebSocket connection when there is a valid template version ID
 	useEffect(() => {
 		if (!realizedVersionId) return;
@@ -127,20 +177,6 @@ const CreateWorkspacePageExperimental: FC = () => {
 		};
 	}, [owner.id, realizedVersionId, onMessage]);
 
-	const sendMessage = useCallback((formValues: Record<string, string>) => {
-		setWSResponseId((prevId) => {
-			const request: DynamicParametersRequest = {
-				id: prevId + 1,
-				inputs: formValues,
-			};
-			if (ws.current && ws.current.readyState === WebSocket.OPEN) {
-				ws.current.send(JSON.stringify(request));
-				return prevId + 1;
-			}
-			return prevId;
-		});
-	}, []);
-
 	const organizationId = templateQuery.data?.organization_id;
 
 	const {
@@ -167,9 +203,6 @@ const CreateWorkspacePageExperimental: FC = () => {
 		[navigate],
 	);
 
-	// Auto fill parameters
-	const autofillParameters = getAutofillParameters(searchParams);
-
 	const autoCreationStartedRef = useRef(false);
 	const automateWorkspaceCreation = useEffectEvent(async () => {
 		if (autoCreationStartedRef.current || !organizationId) {
@@ -231,18 +264,18 @@ const CreateWorkspacePageExperimental: FC = () => {
 	}, [automateWorkspaceCreation, autoCreateReady]);
 
 	const sortedParams = useMemo(() => {
-		if (!currentResponse?.parameters) {
+		if (!latestResponse?.parameters) {
 			return [];
 		}
-		return [...currentResponse.parameters].sort((a, b) => a.order - b.order);
-	}, [currentResponse?.parameters]);
+		return [...latestResponse.parameters].sort((a, b) => a.order - b.order);
+	}, [latestResponse?.parameters]);
 
 	return (
 		<>
 			<Helmet>
 				<title>{pageTitle(title)}</title>
 			</Helmet>
-			{!currentResponse ||
+			{!latestResponse ||
 			!templateQuery.data ||
 			isLoadingFormData ||
 			isLoadingExternalAuth ||
@@ -252,7 +285,7 @@ const CreateWorkspacePageExperimental: FC = () => {
 				<CreateWorkspacePageViewExperimental
 					mode={mode}
 					defaultName={defaultName}
-					diagnostics={currentResponse?.diagnostics ?? []}
+					diagnostics={latestResponse?.diagnostics ?? []}
 					disabledParams={disabledParams}
 					defaultOwner={defaultOwner}
 					owner={owner}
diff --git a/site/src/pages/CreateWorkspacePage/CreateWorkspacePageViewExperimental.tsx b/site/src/pages/CreateWorkspacePage/CreateWorkspacePageViewExperimental.tsx
index 8b1dad47ff..7d22316bfe 100644
--- a/site/src/pages/CreateWorkspacePage/CreateWorkspacePageViewExperimental.tsx
+++ b/site/src/pages/CreateWorkspacePage/CreateWorkspacePageViewExperimental.tsx
@@ -19,7 +19,6 @@ import { Spinner } from "components/Spinner/Spinner";
 import { Switch } from "components/Switch/Switch";
 import { UserAutocomplete } from "components/UserAutocomplete/UserAutocomplete";
 import { type FormikContextType, useFormik } from "formik";
-import { useDebouncedFunction } from "hooks/debounce";
 import { ArrowLeft, CircleAlert, TriangleAlert } from "lucide-react";
 import {
 	DynamicParameter,
@@ -141,6 +140,10 @@ export const CreateWorkspacePageViewExperimental: FC<
 			},
 		});
 
+	const autofillByName = Object.fromEntries(
+		autofillParameters.map((param) => [param.name, param]),
+	);
+
 	useEffect(() => {
 		if (error) {
 			window.scrollTo(0, 0);
@@ -218,7 +221,7 @@ export const CreateWorkspacePageViewExperimental: FC<
 		parameter: PreviewParameter,
 		value: string,
 	) => {
-		const formInputs: { [k: string]: string } = {};
+		const formInputs: Record<string, string> = {};
 		formInputs[parameter.name] = value;
 		const parameters = form.values.rich_parameter_values ?? [];
 
@@ -234,37 +237,17 @@ export const CreateWorkspacePageViewExperimental: FC<
 		sendMessage(formInputs);
 	};
 
-	const { debounced: handleChangeDebounced } = useDebouncedFunction(
-		async (
-			parameter: PreviewParameter,
-			parameterField: string,
-			value: string,
-		) => {
-			await form.setFieldValue(parameterField, {
-				name: parameter.name,
-				value,
-			});
-			form.setFieldTouched(parameter.name, true);
-			sendDynamicParamsRequest(parameter, value);
-		},
-		500,
-	);
-
 	const handleChange = async (
 		parameter: PreviewParameter,
 		parameterField: string,
 		value: string,
 	) => {
-		if (parameter.form_type === "input" || parameter.form_type === "textarea") {
-			handleChangeDebounced(parameter, parameterField, value);
-		} else {
-			await form.setFieldValue(parameterField, {
-				name: parameter.name,
-				value,
-			});
-			form.setFieldTouched(parameter.name, true);
-			sendDynamicParamsRequest(parameter, value);
-		}
+		await form.setFieldValue(parameterField, {
+			name: parameter.name,
+			value,
+		});
+		form.setFieldTouched(parameter.name, true);
+		sendDynamicParamsRequest(parameter, value);
 	};
 
 	return (
@@ -509,6 +492,9 @@ export const CreateWorkspacePageViewExperimental: FC<
 										return null;
 									}
 
+									const formValue =
+										form.values?.rich_parameter_values?.[index]?.value || "";
+
 									return (
 										<DynamicParameter
 											key={parameter.name}
@@ -518,6 +504,8 @@ export const CreateWorkspacePageViewExperimental: FC<
 											}
 											disabled={isDisabled}
 											isPreset={isPresetParameter}
+											autofill={autofillByName[parameter.name] !== undefined}
+											value={formValue}
 										/>
 									);
 								})}