Add seed config

Author: SmartManoj

src/api/index.ts

@@ -116,11 +116,13 @@ export function getModelParams({
 		modelMaxTokens: customMaxTokens,
 		modelMaxThinkingTokens: customMaxThinkingTokens,
 		modelTemperature: customTemperature,
+		modelSeed: customSeed,
 		reasoningEffort: customReasoningEffort,
 	} = options
 
 	let maxTokens = model.maxTokens ?? defaultMaxTokens
 	let thinking: BetaThinkingConfigParam | undefined = undefined
+	let seed = customSeed
 	let temperature = customTemperature ?? defaultTemperature
 	const reasoningEffort = customReasoningEffort ?? defaultReasoningEffort
 
@@ -138,5 +140,5 @@ export function getModelParams({
 		temperature = 1.0
 	}
 
-	return { maxTokens, thinking, temperature, reasoningEffort }
+	return { maxTokens, thinking, temperature, reasoningEffort, seed }
 }

src/api/providers/base-openai-compatible-provider.ts

@@ -72,6 +72,7 @@ export abstract class BaseOpenAiCompatibleProvider<ModelName extends string>
 			model,
 			max_tokens,
 			temperature,
+			seed: this.options.modelSeed,
 			messages: [{ role: "system", content: systemPrompt }, ...convertToOpenAiMessages(messages)],
 			stream: true,
 			stream_options: { include_usage: true },

src/api/providers/openai-native.ts

@@ -230,6 +230,7 @@ export class OpenAiNativeHandler extends BaseProvider implements SingleCompletio
 			model: model.id,
 			messages: [{ role: "user", content: prompt }],
 			temperature: this.options.modelTemperature ?? OPENAI_NATIVE_DEFAULT_TEMPERATURE,
+			seed: this.options.modelSeed,
 		}
 	}
 }

src/api/providers/openai.ts

@@ -142,6 +142,7 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
 			const requestOptions: OpenAI.Chat.Completions.ChatCompletionCreateParamsStreaming = {
 				model: modelId,
 				temperature: this.options.modelTemperature ?? (deepseekReasoner ? DEEP_SEEK_DEFAULT_TEMPERATURE : 0),
+				seed: this.options.modelSeed,
 				messages: convertedMessages,
 				stream: true as const,
 				...(isGrokXAI ? {} : { stream_options: { include_usage: true } }),

src/api/providers/openrouter.ts

@@ -78,6 +78,7 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 			maxTokens,
 			thinking,
 			temperature,
+			seed,
 			topP,
 			reasoningEffort,
 			promptCache,
@@ -108,6 +109,7 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 			model: modelId,
 			max_tokens: maxTokens,
 			temperature,
+			seed,
 			thinking, // OpenRouter is temporarily supporting this.
 			top_p: topP,
 			messages: openAiMessages,
@@ -193,13 +195,14 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 	}
 
 	async completePrompt(prompt: string) {
-		let { id: modelId, maxTokens, thinking, temperature } = await this.fetchModel()
+		let { id: modelId, maxTokens, thinking, temperature, seed } = await this.fetchModel()
 
 		const completionParams: OpenRouterChatCompletionParams = {
 			model: modelId,
 			max_tokens: maxTokens,
 			thinking,
 			temperature,
+			seed,
 			messages: [{ role: "user", content: prompt }],
 			stream: false,
 		}

src/schemas/index.ts

@@ -438,6 +438,7 @@ export const providerSettingsSchema = z.object({
 	diffEnabled: z.boolean().optional(),
 	fuzzyMatchThreshold: z.number().optional(),
 	modelTemperature: z.number().nullish(),
+	modelSeed: z.number().nullish(),
 	rateLimitSeconds: z.number().optional(),
 	// Fake AI
 	fakeAi: z.unknown().optional(),
@@ -528,6 +529,7 @@ const providerSettingsRecord: ProviderSettingsRecord = {
 	diffEnabled: undefined,
 	fuzzyMatchThreshold: undefined,
 	modelTemperature: undefined,
+	modelSeed: undefined,
 	rateLimitSeconds: undefined,
 	// Fake AI
 	fakeAi: undefined,

webview-ui/src/components/settings/ApiOptions.tsx

@@ -50,6 +50,7 @@ import { DiffSettingsControl } from "./DiffSettingsControl"
 import { TemperatureControl } from "./TemperatureControl"
 import { RateLimitSecondsControl } from "./RateLimitSecondsControl"
 import { BedrockCustomArn } from "./providers/BedrockCustomArn"
+import { SeedControl } from "./SeedControl"
 
 export interface ApiOptionsProps {
 	uriScheme: string | undefined
@@ -490,6 +491,10 @@ const ApiOptions = ({
 						value={apiConfiguration.rateLimitSeconds || 0}
 						onChange={(value) => setApiConfigurationField("rateLimitSeconds", value)}
 					/>
+					<SeedControl
+						value={apiConfiguration.modelSeed}
+						onChange={handleInputChange("modelSeed", noTransform)}
+					/>
 				</>
 			)}
 		</div>

webview-ui/src/components/settings/SeedControl.tsx

@@ -0,0 +1,83 @@
+import { VSCodeCheckbox, VSCodeTextField } from "@vscode/webview-ui-toolkit/react"
+import { useEffect, useState } from "react"
+import { useAppTranslation } from "@/i18n/TranslationContext"
+import { useDebounce } from "react-use"
+
+interface SeedControlProps {
+	value: number | string | undefined | null 
+	onChange: (value: number | string | undefined | null) => void
+}
+
+export const SeedControl = ({ value, onChange }: SeedControlProps) => {
+	const { t } = useAppTranslation()
+	const [isCustomSeed, setIsCustomSeed] = useState(value !== undefined && value !== null && value !== "")
+	const [inputValue, setInputValue] = useState<string>(value?.toString() ?? "")
+
+	useDebounce(
+		() => {
+			if (inputValue === "") {
+				onChange(null)
+			} else {
+				const numValue = parseInt(inputValue, 10)
+				if (!isNaN(numValue)) {
+					onChange(numValue)
+				}
+			}
+		},
+		50, 
+		[onChange, inputValue]
+	)
+
+	// Sync internal state with prop changes when switching profiles.
+	useEffect(() => {
+		const hasCustomSeed = value !== undefined && value !== null && value !== ""
+		setIsCustomSeed(hasCustomSeed)
+		setInputValue(value?.toString() ?? "")
+	}, [value])
+
+	const handleCheckboxChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+		const isChecked = e.target.checked
+		setIsCustomSeed(isChecked)
+
+		if (!isChecked) {
+			setInputValue("") 
+		} else {
+			setInputValue(value?.toString() ?? "")
+		}
+	}
+
+	const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+		setInputValue(e.target.value)
+	}
+
+	return (
+		<>
+			<div>
+				<VSCodeCheckbox
+					checked={isCustomSeed}
+					onChange={handleCheckboxChange}>
+					<label className="block font-medium mb-1">{t("settings:seed.useCustom")}</label>
+				</VSCodeCheckbox>
+				<div className="text-sm text-vscode-descriptionForeground mt-1">
+					{t("settings:seed.description")}
+				</div>
+			</div>
+
+			{isCustomSeed && (
+				<div className="flex flex-col gap-3 pl-3 border-l-2 border-vscode-button-background">
+					<div>
+						<VSCodeTextField
+							type="text" 
+							value={inputValue}
+							onInput={handleInputChange}
+							className="w-full"
+						/>
+						<div className="text-vscode-descriptionForeground text-sm mt-1">
+							{t("settings:seed.label")}
+						</div>
+					</div>
+				</div>
+			)}
+		</>
+	)
+}

webview-ui/src/i18n/locales/en/settings.json

@@ -426,6 +426,11 @@
 		"description": "Controls randomness in the model's responses.",
 		"rangeDescription": "Higher values make output more random, lower values make it more deterministic."
 	},
+	"seed": {
+		"useCustom": "Use custom seed",
+		"description": "Controls the deterministic nature of the model's responses. Leave blank for random.",
+		"label": "Enter a seed value"
+	},
 	"modelInfo": {
 		"supportsImages": "Supports images",
 		"noImages": "Does not support images",