feat: refactor chat runtime with modular APIs, state management, and runtime synchronization

This commit is contained in:
Shine1i 2026-02-13 16:45:00 +01:00
commit 23d2cfd09d
12 changed files with 630 additions and 240 deletions

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@ -1,121 +0,0 @@
import type { ChatModelAdapter, ChatModelRunResult } from "@assistant-ui/react";
const API = import.meta.env.VITE_INFERENCE_URL || "/api/chat/generate";
type ContentPart = NonNullable<ChatModelRunResult["content"]>[number];
type RunMessages = Parameters<ChatModelAdapter["run"]>[0]["messages"];
type RunMessage = RunMessages[number];
function collectTextParts(message: RunMessage): string[] {
const textParts = message.content
.filter((c) => c.type === "text")
.map((c) => c.text);
if ("attachments" in message && (message.attachments?.length ?? 0) > 0) {
for (const att of message.attachments ?? []) {
for (const part of att.content ?? []) {
if (part.type === "text") {
textParts.push(part.text);
}
}
}
}
return textParts;
}
function messageToPayload(message: RunMessage): {
role: string;
content: string;
} {
return {
role: message.role,
content: collectTextParts(message).join("\n"),
};
}
function makeBody(messages: RunMessages): string {
const payloadMessages: Array<{ role: string; content: string }> = [];
for (const message of messages) {
payloadMessages.push(messageToPayload(message));
}
return JSON.stringify({ messages: payloadMessages });
}
export function parseThinkTags(raw: string): ChatModelRunResult["content"] {
const parts: ContentPart[] = [];
const thinkStart = raw.indexOf("<think>");
if (thinkStart === -1) {
if (raw) {
parts.push({ type: "text", text: raw });
}
return parts;
}
const before = raw.slice(0, thinkStart);
if (before.trim()) {
parts.push({ type: "text", text: before });
}
const thinkEnd = raw.indexOf("</think>");
if (thinkEnd === -1) {
const reasoning = raw.slice(thinkStart + 7);
if (reasoning) {
parts.push({ type: "reasoning", text: reasoning });
}
return parts;
}
const reasoning = raw.slice(thinkStart + 7, thinkEnd);
if (reasoning) {
parts.push({ type: "reasoning", text: reasoning });
}
const after = raw.slice(thinkEnd + 8);
if (after) {
parts.push({ type: "text", text: after });
}
return parts;
}
export function createStreamAdapter(apiUrl: string = API): ChatModelAdapter {
return {
// biome-ignore lint/complexity/noExcessiveCognitiveComplexity: stream loop ok
async *run({ messages, abortSignal }) {
const res = await fetch(apiUrl, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: makeBody(messages),
signal: abortSignal,
});
const reader = res.body?.getReader();
if (!reader) {
throw new Error("Response body is empty");
}
const decoder = new TextDecoder();
let text = "";
let reasoningStart: number | null = null;
let reasoningDuration = 0;
while (true) {
const { done, value } = await reader.read();
if (done) {
break;
}
text += decoder.decode(value, { stream: true });
const parts = parseThinkTags(text) ?? [];
if (parts.some((p) => p.type === "reasoning") && !reasoningStart) {
reasoningStart = Date.now();
}
if (text.includes("</think>") && reasoningStart && !reasoningDuration) {
reasoningDuration = Math.round((Date.now() - reasoningStart) / 1000);
}
if (parts.length > 0) {
yield {
content: parts,
metadata: { custom: { reasoningDuration } },
};
}
}
},
};
}

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@ -0,0 +1,113 @@
import type { ChatModelAdapter } from "@assistant-ui/react";
import { streamChatCompletions } from "./chat-api";
import { useChatRuntimeStore } from "../stores/chat-runtime-store";
import {
hasClosedThinkTag,
parseAssistantContent,
} from "../utils/parse-assistant-content";
type RunMessages = Parameters<ChatModelAdapter["run"]>[0]["messages"];
type RunMessage = RunMessages[number];
function collectTextParts(message: RunMessage): string[] {
const textParts = message.content
.filter((part) => part.type === "text")
.map((part) => part.text);
if ("attachments" in message && (message.attachments?.length ?? 0) > 0) {
for (const attachment of message.attachments ?? []) {
for (const part of attachment.content ?? []) {
if (part.type === "text") {
textParts.push(part.text);
}
}
}
}
return textParts;
}
function toOpenAIMessage(message: RunMessage): {
role: "system" | "user" | "assistant";
content: string;
} | null {
if (
message.role !== "system" &&
message.role !== "user" &&
message.role !== "assistant"
) {
return null;
}
return {
role: message.role,
content: collectTextParts(message).join("\n"),
};
}
export function createOpenAIStreamAdapter(): ChatModelAdapter {
return {
async *run({ messages, abortSignal }) {
const state = useChatRuntimeStore.getState();
const { params } = state;
if (!params.checkpoint) {
throw new Error("Load a model first.");
}
const outboundMessages = messages
.map(toOpenAIMessage)
.filter((message): message is NonNullable<typeof message> =>
Boolean(message),
);
if (params.systemPrompt.trim()) {
outboundMessages.unshift({
role: "system",
content: params.systemPrompt.trim(),
});
}
const stream = streamChatCompletions(
{
model: params.checkpoint,
messages: outboundMessages,
stream: true,
temperature: params.temperature,
top_p: params.topP,
max_tokens: params.maxTokens,
top_k: params.topK,
repetition_penalty: params.repetitionPenalty,
},
abortSignal,
);
let cumulativeText = "";
let reasoningStartAt: number | null = null;
let reasoningDuration = 0;
for await (const chunk of stream) {
const delta = chunk.choices?.[0]?.delta?.content;
if (!delta) {
continue;
}
cumulativeText += delta;
const parts = parseAssistantContent(cumulativeText);
if (parts.some((part) => part.type === "reasoning") && !reasoningStartAt) {
reasoningStartAt = Date.now();
}
if (hasClosedThinkTag(cumulativeText) && reasoningStartAt && !reasoningDuration) {
reasoningDuration = Math.round((Date.now() - reasoningStartAt) / 1000);
}
if (parts.length > 0) {
yield {
content: parts,
metadata: { custom: { reasoningDuration } },
};
}
}
},
};
}

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@ -0,0 +1,139 @@
import { authFetch } from "@/features/auth";
import type {
InferenceStatusResponse,
ListModelsResponse,
LoadModelRequest,
LoadModelResponse,
OpenAIChatCompletionsRequest,
OpenAIChatChunk,
UnloadModelRequest,
} from "../types/api";
function parseErrorText(status: number, body: unknown): string {
if (
body &&
typeof body === "object" &&
"detail" in body &&
typeof body.detail === "string"
) {
return body.detail;
}
if (
body &&
typeof body === "object" &&
"message" in body &&
typeof body.message === "string"
) {
return body.message;
}
return `Request failed (${status})`;
}
async function parseJsonOrThrow<T>(response: Response): Promise<T> {
const body = await response.json().catch(() => null);
if (!response.ok) {
throw new Error(parseErrorText(response.status, body));
}
return body as T;
}
export async function listModels(): Promise<ListModelsResponse> {
const response = await authFetch("/api/models/list");
return parseJsonOrThrow<ListModelsResponse>(response);
}
export async function getInferenceStatus(): Promise<InferenceStatusResponse> {
const response = await authFetch("/api/inference/status");
return parseJsonOrThrow<InferenceStatusResponse>(response);
}
export async function loadModel(
payload: LoadModelRequest,
): Promise<LoadModelResponse> {
const response = await authFetch("/api/inference/load", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(payload),
});
return parseJsonOrThrow<LoadModelResponse>(response);
}
export async function unloadModel(payload: UnloadModelRequest): Promise<void> {
const response = await authFetch("/api/inference/unload", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(payload),
});
await parseJsonOrThrow<unknown>(response);
}
function parseSseEvent(rawEvent: string): string[] {
const dataLines: string[] = [];
for (const line of rawEvent.split(/\r?\n/)) {
if (line.startsWith("data:")) {
dataLines.push(line.slice(5).trimStart());
}
}
return dataLines;
}
export async function* streamChatCompletions(
payload: OpenAIChatCompletionsRequest,
signal: AbortSignal,
): AsyncGenerator<OpenAIChatChunk> {
const response = await authFetch("/api/inference/chat/completions", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(payload),
signal,
});
if (!response.ok) {
const body = await response.json().catch(() => null);
throw new Error(parseErrorText(response.status, body));
}
if (!response.body) {
throw new Error("Stream response missing body");
}
const reader = response.body.getReader();
const decoder = new TextDecoder();
let buffer = "";
while (true) {
const { done, value } = await reader.read();
if (done) {
break;
}
buffer += decoder.decode(value, { stream: true });
let separatorIndex = buffer.search(/\r?\n\r?\n/);
while (separatorIndex >= 0) {
const rawEvent = buffer.slice(0, separatorIndex);
const separatorLength = buffer[separatorIndex] === "\r" ? 4 : 2;
buffer = buffer.slice(separatorIndex + separatorLength);
const dataLines = parseSseEvent(rawEvent);
if (dataLines.length === 0) {
separatorIndex = buffer.search(/\r?\n\r?\n/);
continue;
}
const dataText = dataLines.join("\n");
if (dataText === "[DONE]") {
return;
}
const parsed = JSON.parse(dataText) as
| OpenAIChatChunk
| { error?: { message?: string } };
if ("error" in parsed && parsed.error) {
throw new Error(parsed.error.message || "Stream error");
}
yield parsed as OpenAIChatChunk;
separatorIndex = buffer.search(/\r?\n\r?\n/);
}
}
}

View file

@ -28,16 +28,15 @@ import {
memo,
useCallback,
useEffect,
useMemo,
useRef,
useState,
} from "react";
import {
ChatSettingsPanel,
type InferenceParams,
defaultInferenceParams,
} from "./chat-settings-sheet";
import { ChatSettingsPanel } from "./chat-settings-sheet";
import { db } from "./db";
import { useChatModelRuntime } from "./hooks/use-chat-model-runtime";
import { ChatRuntimeProvider } from "./runtime-provider";
import { useChatRuntimeStore } from "./stores/chat-runtime-store";
import {
type CompareHandle,
CompareHandlesProvider,
@ -47,42 +46,6 @@ import {
import { ThreadSidebar } from "./thread-sidebar";
import type { ChatView } from "./types";
const LORA_MODELS: ModelOption[] = [
{
id: "outputs/llama-3.1-8b-instruct-lora",
name: "meta-llama/Llama-3.1-8B-Instruct",
description: "LoRA v1",
},
{
id: "outputs/qwen2.5-7b-lora",
name: "Qwen/Qwen2.5-7B-Instruct",
description: "LoRA v2",
},
{
id: "outputs/mistral-7b-v0.3-lora",
name: "mistralai/Mistral-7B-Instruct-v0.3",
description: "LoRA v1",
},
];
const GGUF_MODELS: ModelOption[] = [
{
id: "models/Meta-Llama-3.1-8B-Instruct-Q4_K_M.gguf",
name: "Meta-Llama-3.1-8B-Instruct",
description: "Q4_K_M",
},
{
id: "models/Qwen2.5-7B-Instruct-Q5_K_M.gguf",
name: "Qwen2.5-7B-Instruct",
description: "Q5_K_M",
},
{
id: "models/Mistral-7B-Instruct-v0.3-Q4_K_M.gguf",
name: "Mistral-7B-Instruct-v0.3",
description: "Q4_K_M",
},
];
const SingleContent = memo(function SingleContent({
threadId,
}: { threadId?: string }): ReactElement {
@ -235,26 +198,40 @@ function TopBarActions({
export function ChatPage(): ReactElement {
const [view, setView] = useState<ChatView>({ mode: "single" });
const [settingsOpen, setSettingsOpen] = useState(false);
const [inferenceParams, setInferenceParams] = useState<InferenceParams>(
defaultInferenceParams,
);
const inferenceParams = useChatRuntimeStore((state) => state.params);
const setInferenceParams = useChatRuntimeStore((state) => state.setParams);
const modelsFromStore = useChatRuntimeStore((state) => state.models);
const modelsError = useChatRuntimeStore((state) => state.modelsError);
const { refresh, selectModel, ejectModel } = useChatModelRuntime();
const handleCheckpointChange = useCallback(
(v: string) => setInferenceParams((p) => ({ ...p, checkpoint: v })),
[],
);
const handleEject = useCallback(
() => setInferenceParams((p) => ({ ...p, checkpoint: "" })),
[],
(value: string) => {
void selectModel(value);
},
[selectModel],
);
const handleEject = useCallback(() => {
void ejectModel();
}, [ejectModel]);
const handleNewThread = useCallback(() => setView({ mode: "single" }), []);
const handleNewCompare = useCallback(
() => setView({ mode: "compare", pairId: crypto.randomUUID() }),
[],
);
const models =
inferenceParams.inferenceEngine === "llama-cpp" ? GGUF_MODELS : LORA_MODELS;
const models = useMemo<ModelOption[]>(
() =>
modelsFromStore.map((model) => ({
id: model.id,
name: model.name,
description: model.description,
})),
[modelsFromStore],
);
useEffect(() => {
void refresh();
}, [refresh]);
return (
<SidebarProvider
@ -292,6 +269,11 @@ export function ChatPage(): ReactElement {
variant="ghost"
/>
</div>
{modelsError && (
<div className="ml-2 text-xs text-destructive truncate max-w-[28rem]">
{modelsError}
</div>
)}
<div className="flex-1" />
<button
type="button"

View file

@ -10,7 +10,6 @@ import { Textarea } from "@/components/ui/textarea";
import {
ArrowDown01Icon,
Delete02Icon,
EngineIcon,
FloppyDiskIcon,
PencilEdit01Icon,
Settings02Icon,
@ -20,28 +19,13 @@ import { HugeiconsIcon } from "@hugeicons/react";
import { AnimatePresence, motion } from "motion/react";
import type { ReactNode } from "react";
import { useState } from "react";
import {
DEFAULT_INFERENCE_PARAMS,
type InferenceParams,
} from "./types/runtime";
export interface InferenceParams {
temperature: number;
topP: number;
topK: number;
repetitionPenalty: number;
maxTokens: number;
systemPrompt: string;
inferenceEngine: string;
checkpoint: string;
}
export const defaultInferenceParams: InferenceParams = {
temperature: 0.7,
topP: 0.9,
topK: 50,
repetitionPenalty: 1.1,
maxTokens: 512,
systemPrompt: "",
inferenceEngine: "unsloth",
checkpoint: "outputs/llama-3.1-8b-instruct-lora",
};
export const defaultInferenceParams = DEFAULT_INFERENCE_PARAMS;
export type { InferenceParams } from "./types/runtime";
export interface Preset {
name: string;
@ -72,11 +56,6 @@ const BUILTIN_PRESETS: Preset[] = [
},
];
const ENGINE_OPTIONS = [
{ value: "unsloth", label: "Unsloth" },
{ value: "llama-cpp", label: "llama.cpp (GGUF)" },
];
function ParamSlider({
label,
value,
@ -285,33 +264,6 @@ export function ChatSettingsPanel({
/>
</div>
<CollapsibleSection
icon={EngineIcon}
label="Inference Engine"
defaultOpen={true}
>
<div>
<span className="mb-1 block text-[11px] text-muted-foreground">
Backend
</span>
<Select
value={params.inferenceEngine}
onValueChange={set("inferenceEngine")}
>
<SelectTrigger className="h-8 w-full text-xs corner-squircle">
<SelectValue />
</SelectTrigger>
<SelectContent>
{ENGINE_OPTIONS.map((o) => (
<SelectItem key={o.value} value={o.value}>
{o.label}
</SelectItem>
))}
</SelectContent>
</Select>
</div>
</CollapsibleSection>
<CollapsibleSection
icon={SlidersHorizontalIcon}
label="Sampling"

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@ -0,0 +1,140 @@
import { useCallback } from "react";
import {
getInferenceStatus,
listModels,
loadModel,
unloadModel,
} from "../api/chat-api";
import { useChatRuntimeStore } from "../stores/chat-runtime-store";
import type { ChatModelSummary } from "../types/runtime";
const DEFAULT_MODEL_MAX_SEQ_LENGTH = 2048;
function describeModel(model: {
is_lora?: boolean;
is_vision?: boolean;
}): string | undefined {
const tags: string[] = [];
if (model.is_lora) tags.push("LoRA");
if (model.is_vision) tags.push("Vision");
if (!model.is_lora && !model.is_vision) tags.push("Base");
return tags.join(" · ");
}
function toChatModelSummary(model: {
id: string;
name?: string | null;
is_lora?: boolean;
is_vision?: boolean;
}): ChatModelSummary {
return {
id: model.id,
name: model.name || model.id,
description: describeModel(model),
isLora: Boolean(model.is_lora),
isVision: Boolean(model.is_vision),
};
}
export function useChatModelRuntime() {
const params = useChatRuntimeStore((state) => state.params);
const models = useChatRuntimeStore((state) => state.models);
const setModels = useChatRuntimeStore((state) => state.setModels);
const setModelsError = useChatRuntimeStore((state) => state.setModelsError);
const setCheckpoint = useChatRuntimeStore((state) => state.setCheckpoint);
const clearCheckpoint = useChatRuntimeStore((state) => state.clearCheckpoint);
const refresh = useCallback(async () => {
setModelsError(null);
try {
const [listRes, statusRes] = await Promise.all([
listModels(),
getInferenceStatus(),
]);
const modelList = listRes.models.map(toChatModelSummary);
setModels(modelList);
if (statusRes.active_model) {
setCheckpoint(statusRes.active_model);
}
} catch (error) {
const message =
error instanceof Error ? error.message : "Failed to load models";
setModelsError(message);
}
}, [
setCheckpoint,
setModels,
setModelsError,
]);
const selectModel = useCallback(
async (modelId: string) => {
if (!modelId || params.checkpoint === modelId) {
return;
}
const selected = models.find((model) => model.id === modelId);
if (!selected) {
setModelsError("Selected model was not found in model list.");
return;
}
setModelsError(null);
try {
if (params.checkpoint) {
await unloadModel({ model_path: params.checkpoint });
}
await loadModel({
model_path: selected.id,
hf_token: null,
max_seq_length: DEFAULT_MODEL_MAX_SEQ_LENGTH,
load_in_4bit: true,
is_lora: selected.isLora,
});
setCheckpoint(selected.id);
await refresh();
} catch (error) {
const message =
error instanceof Error ? error.message : "Failed to load model";
setModelsError(message);
}
},
[
models,
params.checkpoint,
refresh,
setCheckpoint,
setModelsError,
],
);
const ejectModel = useCallback(async () => {
if (!params.checkpoint) {
return;
}
setModelsError(null);
try {
await unloadModel({ model_path: params.checkpoint });
clearCheckpoint();
await refresh();
} catch (error) {
const message =
error instanceof Error ? error.message : "Failed to unload model";
setModelsError(message);
}
}, [
clearCheckpoint,
params.checkpoint,
refresh,
setModelsError,
]);
return {
refresh,
selectModel,
ejectModel,
};
}

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@ -5,3 +5,5 @@ export {
type InferenceParams,
type Preset,
} from "./chat-settings-sheet";
export { useChatRuntimeStore } from "./stores/chat-runtime-store";
export { useChatModelRuntime } from "./hooks/use-chat-model-runtime";

View file

@ -9,7 +9,6 @@ import {
RuntimeAdapterProvider,
SimpleImageAttachmentAdapter,
SimpleTextAttachmentAdapter,
Suggestions,
type ThreadHistoryAdapter,
type ThreadMessage,
type ThreadUserMessagePart,
@ -24,7 +23,7 @@ import { createAssistantStream } from "assistant-stream";
import mammoth from "mammoth";
import { type ReactElement, type ReactNode, useEffect, useMemo } from "react";
import { extractText, getDocumentProxy } from "unpdf";
import { createStreamAdapter } from "./adapter";
import { createOpenAIStreamAdapter } from "./api/chat-adapter";
import { db } from "./db";
import type { MessageRecord, ModelType } from "./types";
@ -288,9 +287,11 @@ function ThreadHistoryProvider({
);
}
const chatAdapter = createStreamAdapter();
const useRuntimeHook = (): ReturnType<typeof useLocalRuntime> =>
useLocalRuntime(chatAdapter);
const chatAdapter = createOpenAIStreamAdapter();
function useRuntimeHook(): ReturnType<typeof useLocalRuntime> {
return useLocalRuntime(chatAdapter);
}
function ThreadAutoSwitch({
threadId,
@ -327,14 +328,7 @@ export function ChatRuntimeProvider({
},
});
const aui = useAui({
suggestions: Suggestions([
"Draw a simple flowchart of a login system using Mermaid",
"Solve the integral of x\u00B2\u00B7sin(x) step by step",
"Write a Python function that finds the longest palindrome in a string",
"Format a comparison of 3 databases as a markdown table with pros and cons",
]),
});
const aui = useAui();
return (
<AssistantRuntimeProvider runtime={runtime} aui={aui}>

View file

@ -0,0 +1,40 @@
import { create } from "zustand";
import {
DEFAULT_INFERENCE_PARAMS,
type ChatModelSummary,
type InferenceParams,
} from "../types/runtime";
type ChatRuntimeStore = {
params: InferenceParams;
models: ChatModelSummary[];
modelsError: string | null;
setParams: (params: InferenceParams) => void;
setModels: (models: ChatModelSummary[]) => void;
setModelsError: (error: string | null) => void;
setCheckpoint: (modelId: string) => void;
clearCheckpoint: () => void;
};
export const useChatRuntimeStore = create<ChatRuntimeStore>((set) => ({
params: DEFAULT_INFERENCE_PARAMS,
models: [],
modelsError: null,
setParams: (params) => set({ params }),
setModels: (models) => set({ models }),
setModelsError: (modelsError) => set({ modelsError }),
setCheckpoint: (modelId) =>
set((state) => ({
params: {
...state.params,
checkpoint: modelId,
},
})),
clearCheckpoint: () =>
set((state) => ({
params: {
...state.params,
checkpoint: "",
},
})),
}));

View file

@ -0,0 +1,68 @@
export interface BackendModelDetails {
id: string;
name?: string | null;
is_vision?: boolean;
is_lora?: boolean;
}
export interface ListModelsResponse {
models: BackendModelDetails[];
default_models: string[];
}
export interface LoadModelRequest {
model_path: string;
hf_token: string | null;
max_seq_length: number;
load_in_4bit: boolean;
is_lora: boolean;
}
export interface LoadModelResponse {
status: string;
model: string;
display_name: string;
is_vision: boolean;
is_lora: boolean;
}
export interface UnloadModelRequest {
model_path: string;
}
export interface InferenceStatusResponse {
active_model: string | null;
is_vision: boolean;
loading: string[];
loaded: string[];
}
export interface OpenAIChatMessage {
role: "system" | "user" | "assistant";
content: string;
}
export interface OpenAIChatCompletionsRequest {
model: string;
messages: OpenAIChatMessage[];
stream: boolean;
temperature: number;
top_p: number;
max_tokens: number;
top_k: number;
repetition_penalty: number;
}
export interface OpenAIChatDelta {
role?: string;
content?: string;
}
export interface OpenAIChatChunkChoice {
delta?: OpenAIChatDelta;
finish_reason?: string | null;
}
export interface OpenAIChatChunk {
choices?: OpenAIChatChunkChoice[];
}

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@ -0,0 +1,27 @@
export interface InferenceParams {
temperature: number;
topP: number;
topK: number;
repetitionPenalty: number;
maxTokens: number;
systemPrompt: string;
checkpoint: string;
}
export const DEFAULT_INFERENCE_PARAMS: InferenceParams = {
temperature: 0.7,
topP: 0.9,
topK: 50,
repetitionPenalty: 1.1,
maxTokens: 512,
systemPrompt: "",
checkpoint: "",
};
export interface ChatModelSummary {
id: string;
name: string;
description?: string;
isVision: boolean;
isLora: boolean;
}

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@ -0,0 +1,54 @@
import type { ChatModelRunResult } from "@assistant-ui/react";
type ContentPart = NonNullable<ChatModelRunResult["content"]>[number];
const THINK_OPEN_TAG = "<think>";
const THINK_CLOSE_TAG = "</think>";
function appendTextPart(parts: ContentPart[], text: string): void {
if (text) {
parts.push({ type: "text", text });
}
}
function appendReasoningPart(parts: ContentPart[], text: string): void {
if (text) {
parts.push({ type: "reasoning", text });
}
}
export function parseAssistantContent(
raw: string,
): ContentPart[] {
const parts: ContentPart[] = [];
if (!raw) {
return parts;
}
let cursor = 0;
while (cursor < raw.length) {
const openIndex = raw.indexOf(THINK_OPEN_TAG, cursor);
if (openIndex === -1) {
appendTextPart(parts, raw.slice(cursor));
break;
}
appendTextPart(parts, raw.slice(cursor, openIndex));
const reasoningStart = openIndex + THINK_OPEN_TAG.length;
const closeIndex = raw.indexOf(THINK_CLOSE_TAG, reasoningStart);
if (closeIndex === -1) {
appendReasoningPart(parts, raw.slice(reasoningStart));
break;
}
appendReasoningPart(parts, raw.slice(reasoningStart, closeIndex));
cursor = closeIndex + THINK_CLOSE_TAG.length;
}
return parts;
}
export function hasClosedThinkTag(raw: string): boolean {
return raw.includes(THINK_CLOSE_TAG);
}