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1x 9x 11x 58x | import * as vscode from "vscode";
import { LanguageModelChatMessage, ProvideLanguageModelChatResponseOptions } from "vscode";
import { jsonrepair } from "jsonrepair";
import { ConfigManager } from "../shared/config";
import {
extractStandaloneXmlParameters as scanStandaloneXmlParameters,
findXmlConstructStart,
indexOfUnquoted,
isTokenInStringOrRegexLiteral,
scanXmlToolConstruct,
} from "./xml-tool-scanner";
function safeJsonParse(text: string): Record<string, unknown> {
Iif (!text) return {};
try {
return parseToolArgumentsStrict(text);
} catch {
// Repair is deliberately attempted only after strict JSON parsing fails.
}
try {
return parseJsonObject(JSON.parse(jsonrepair(text)));
} catch {
throw new Error("Failed to parse JSON");
}
}
function parseJsonObject(value: unknown): Record<string, unknown> {
if (typeof value === "object" && value !== null && !Array.isArray(value)) {
return value as Record<string, unknown>;
}
throw new Error("Tool arguments must be a JSON object");
}
export function parseToolArguments(text: string): Record<string, unknown> {
return safeJsonParse(text);
}
export function parseToolArgumentsStrict(text: string): Record<string, unknown> {
return parseJsonObject(JSON.parse(text));
}
export type ToolSchemaType = "string" | "number" | "integer" | "boolean" | "object" | "array";
export interface ToolPropertySchema {
type?: ToolSchemaType;
enum?: unknown[];
required?: string[];
properties?: Record<string, ToolPropertySchema>;
items?: ToolPropertySchema;
}
export interface ToolSchema {
required?: string[];
enumValues?: Record<string, string[]>;
properties?: Record<string, ToolPropertySchema>;
}
export type SkippedToolCallReason = "invalid" | "duplicate" | "missing_payload";
export interface SkippedToolCall {
name: string;
required: string[];
reason?: SkippedToolCallReason;
}
export interface ParsedTextToolCall {
name: string;
args: unknown;
}
export interface ParsedTextSegmentText {
type: "text";
text: string;
}
export interface ParsedTextSegmentToolCall {
type: "toolCall";
toolCall: ParsedTextToolCall;
}
export interface ParsedTextSegmentInvalidToolCall {
type: "invalidToolCall";
name: string;
}
export type ParsedTextSegment =
| ParsedTextSegmentText
| ParsedTextSegmentToolCall
| ParsedTextSegmentInvalidToolCall;
export interface ParsedTextToolCallResult {
segments: ParsedTextSegment[];
incompleteText: string;
extractedParams?: Record<string, unknown>;
}
export interface ChatRequestContext {
filePath?: string;
startLine?: number;
endLine?: number;
cwd?: string;
extractedParameters?: Record<string, unknown>;
}
export function buildToolCallCanonicalKey(name: string, args: unknown): string {
return `${name}:${JSON.stringify(sortObjectKeys(args))}`;
}
export function isDuplicateSuppressionEnabled(toolName: string): boolean {
if (!ConfigManager.getToolsConfig().suppressDuplicateReads) {
return false;
}
const normalized = toolName.toLowerCase();
if (
normalized.includes("terminal") ||
normalized.includes("command") ||
normalized.includes("exec") ||
normalized.includes("write") ||
normalized.includes("edit") ||
normalized.includes("create") ||
normalized.includes("delete") ||
normalized.includes("patch") ||
normalized.includes("replace") ||
normalized.includes("apply") ||
normalized.includes("grep") ||
normalized.includes("search") ||
normalized.includes("find")
) {
return false;
}
return true;
}
function sortObjectKeys(value: unknown): unknown {
Iif (Array.isArray(value)) {
return value.map(sortObjectKeys);
}
if (typeof value !== "object" || value === null) {
return value;
}
return Object.fromEntries(
Object.entries(value as Record<string, unknown>)
.sort(([left], [right]) => left.localeCompare(right))
.map(([key, child]) => [key, sortObjectKeys(child)]),
);
}
export function getCompletedToolCallKeys(
messages: readonly LanguageModelChatMessage[],
requestContext: ChatRequestContext | undefined,
toolSchemas: ReadonlyMap<string, ToolSchema>,
): Set<string> {
let startIndex = 0;
for (let i = messages.length - 1; i >= 0; i -= 1) {
const message = messages[i];
if (message.role !== vscode.LanguageModelChatMessageRole.User) {
continue;
}
const hasNonToolResultContent = message.content.some((part) => {
const toolResultPart = part as { callId?: unknown; content?: unknown[] };
return !(typeof toolResultPart.callId === "string" && Array.isArray(toolResultPart.content));
});
if (hasNonToolResultContent) {
startIndex = i + 1;
break;
}
}
const completedCallIds = new Set<string>();
for (const message of messages.slice(startIndex)) {
for (const part of message.content) {
const toolResultPart = part as { callId?: unknown; content?: unknown[] };
if (typeof toolResultPart.callId === "string" && Array.isArray(toolResultPart.content)) {
completedCallIds.add(toolResultPart.callId);
}
}
}
const keys = new Set<string>();
for (const message of messages.slice(startIndex)) {
for (const part of message.content) {
const toolCallPart = part as { callId?: unknown; name?: unknown; input?: unknown };
if (
typeof toolCallPart.callId !== "string" ||
!completedCallIds.has(toolCallPart.callId) ||
typeof toolCallPart.name !== "string"
) {
continue;
}
const repairedArgs = repairToolArguments(
toolCallPart.name,
toolCallPart.input ?? {},
requestContext,
toolSchemas.get(toolCallPart.name),
);
keys.add(buildToolCallCanonicalKey(toolCallPart.name, repairedArgs));
}
}
return keys;
}
export function getToolSchemaMap(
options: ProvideLanguageModelChatResponseOptions,
): Map<string, ToolSchema> {
const map = new Map<string, ToolSchema>();
for (const tool of options.tools ?? []) {
const inputSchema = tool.inputSchema as
| { required?: unknown; properties?: unknown }
| undefined;
const required = Array.isArray(inputSchema?.required)
? inputSchema.required.filter(
(value): value is string => typeof value === "string" && value.length > 0,
)
: undefined;
const properties = normalizeProperties(inputSchema?.properties);
const enumValues: Record<string, string[]> = {};
for (const [name, propertySchema] of Object.entries(properties)) {
const allowed = propertySchema.enum?.filter(
(item): item is string => typeof item === "string",
);
if (allowed && allowed.length > 0) {
enumValues[name] = allowed;
}
}
map.set(tool.name, {
required,
enumValues,
properties,
});
}
return map;
}
function normalizeProperties(value: unknown): Record<string, ToolPropertySchema> {
if (typeof value !== "object" || value === null || Array.isArray(value)) {
return {};
}
const properties: Record<string, ToolPropertySchema> = {};
for (const [name, rawSchema] of Object.entries(value)) {
Iif (typeof rawSchema !== "object" || rawSchema === null || Array.isArray(rawSchema)) {
continue;
}
const schema = rawSchema as {
type?: unknown;
enum?: unknown;
required?: unknown;
properties?: unknown;
items?: unknown;
};
const type =
schema.type === "string" ||
schema.type === "number" ||
schema.type === "integer" ||
schema.type === "boolean" ||
schema.type === "object" ||
schema.type === "array"
? schema.type
: undefined;
const property: ToolPropertySchema = {
...(type ? { type } : {}),
...(Array.isArray(schema.enum) ? { enum: schema.enum } : {}),
...(Array.isArray(schema.required)
? {
required: schema.required.filter(
(item): item is string => typeof item === "string" && item.length > 0,
),
}
: {}),
};
const nestedProperties = normalizeProperties(schema.properties);
if (Object.keys(nestedProperties).length > 0) {
property.properties = nestedProperties;
}
const nestedItems = normalizePropertySchema(schema.items);
if (nestedItems) {
property.items = nestedItems;
}
properties[name] = property;
}
return properties;
}
function normalizePropertySchema(value: unknown): ToolPropertySchema | undefined {
if (typeof value !== "object" || value === null || Array.isArray(value)) {
return undefined;
}
const normalized = normalizeProperties({ value });
return normalized.value;
}
function normalizeScalar(value: unknown, schema: ToolPropertySchema): unknown {
if (typeof value !== "string") {
return value;
}
const trimmed = value.trim();
if (schema.type === "boolean") {
if (["true", "yes", "1"].includes(trimmed.toLowerCase())) return true;
Iif (["false", "no", "0"].includes(trimmed.toLowerCase())) return false;
}
if (schema.type === "number" || schema.type === "integer") {
const numberValue = Number(trimmed);
if (trimmed.length > 0 && Number.isFinite(numberValue)) return numberValue;
}
return value;
}
export function tryParseJsonValue(text: string): unknown {
Iif (!text) return text;
try {
return JSON.parse(text);
} catch {
// Attempt jsonrepair if strict parse fails
}
try {
return JSON.parse(jsonrepair(text));
} catch {
return text;
}
}
function normalizeValue(value: unknown, schema: ToolPropertySchema): unknown {
let normalized = normalizeScalar(value, schema);
if (typeof normalized === "string") {
const trimmed = normalized.trim();
if (
schema.type === "array" ||
(!schema.type && trimmed.startsWith("[") && trimmed.endsWith("]"))
) {
const parsed = tryParseJsonValue(trimmed);
if (Array.isArray(parsed)) {
normalized = parsed;
}
} else Iif (
schema.type === "object" ||
(!schema.type && trimmed.startsWith("{") && trimmed.endsWith("}"))
) {
const parsed = tryParseJsonValue(trimmed);
Iif (typeof parsed === "object" && parsed !== null && !Array.isArray(parsed)) {
normalized = parsed;
}
}
}
if (
schema.type === "object" &&
typeof normalized === "object" &&
normalized !== null &&
!Array.isArray(normalized)
) {
return normalizeArguments(normalized as Record<string, unknown>, {
properties: schema.properties,
});
}
if (schema.type === "array" && Array.isArray(normalized)) {
return schema.items
? normalized.map((item) => normalizeValue(item, schema.items!))
: normalized;
}
return normalized;
}
function normalizeArguments(
args: Record<string, unknown>,
schema: ToolSchema,
): Record<string, unknown> {
const properties = schema.properties ?? {};
const normalized: Record<string, unknown> = { ...args };
for (const [name, propertySchema] of Object.entries(properties)) {
if (name in normalized) {
normalized[name] = normalizeValue(normalized[name], propertySchema);
}
}
return normalized;
}
function valuesEqual(left: unknown, right: unknown): boolean {
if (Object.is(left, right)) return true;
return typeof left === "object" && left !== null && typeof right === "object" && right !== null
? JSON.stringify(left) === JSON.stringify(right)
: false;
}
function isSchemaValueValid(value: unknown, schema: ToolPropertySchema): boolean {
if (schema.enum && !schema.enum.some((allowed) => valuesEqual(value, allowed))) {
return false;
}
switch (schema.type) {
case "string":
return typeof value === "string";
case "number":
return typeof value === "number" && Number.isFinite(value);
case "integer":
return typeof value === "number" && Number.isInteger(value);
case "boolean":
return typeof value === "boolean";
case "array":
return (
Array.isArray(value) &&
(!schema.items || value.every((item) => isSchemaValueValid(item, schema.items!)))
);
case "object":
Iif (typeof value !== "object" || value === null || Array.isArray(value)) return false;
return validateToolArguments(value, {
required: schema.required,
properties: schema.properties,
});
default:
return true;
}
}
export function validateToolArguments(args: unknown, schema: ToolSchema | undefined): boolean {
Iif (!schema || typeof args !== "object" || args === null || Array.isArray(args)) {
return false;
}
const record = args as Record<string, unknown>;
for (const key of schema.required ?? []) {
const value = record[key];
if (
value === undefined ||
value === null ||
(typeof value === "string" && value.trim() === "")
) {
return false;
}
}
for (const [name, propertySchema] of Object.entries(schema.properties ?? {})) {
if (name in record && !isSchemaValueValid(record[name], propertySchema)) {
return false;
}
}
return true;
}
export function hasRequiredToolArguments(args: unknown, schema: ToolSchema | undefined): boolean {
return validateToolArguments(args, schema);
}
export function buildInvalidToolCallFallback(
skippedToolCalls: readonly SkippedToolCall[],
): string | undefined {
if (skippedToolCalls.some((toolCall) => toolCall.reason === "missing_payload")) {
return "The model indicated a tool call but the stream did not include tool arguments. Retry the request.";
}
if (
skippedToolCalls.length > 0 &&
skippedToolCalls.every((toolCall) => toolCall.reason === "duplicate")
) {
return `Tool call \`${skippedToolCalls[0].name}\` was not repeated because it already completed with the same arguments. Call it again only with different arguments.`;
}
const skippedWithRequiredArgs = skippedToolCalls.find((toolCall) => toolCall.required.length > 0);
Iif (skippedWithRequiredArgs) {
const requiredArgs = skippedWithRequiredArgs.required.map((arg) => `\`${arg}\``).join(", ");
return `Tool call \`${skippedWithRequiredArgs.name}\` was rejected: missing ${requiredArgs}. Retry with all required fields filled.`;
}
const firstSkippedToolCall = skippedToolCalls[0];
Iif (!firstSkippedToolCall) {
return undefined;
}
return `Tool call \`${firstSkippedToolCall.name}\` had invalid arguments. Retry with a valid JSON object.`;
}
export function buildInvalidToolCallRetryMessage(
skippedToolCalls: readonly SkippedToolCall[],
): string | undefined {
if (skippedToolCalls.some((toolCall) => toolCall.reason === "missing_payload")) {
return [
"Your previous response finished with tool_calls but no tool function arguments were received.",
"Retry NOW with a native tool call that includes the function name and a complete JSON arguments object.",
"Do not emit an empty tool_calls array.",
"Do not ask the user to retry. Do not explain the error.",
].join(" ");
}
if (
skippedToolCalls.length > 0 &&
skippedToolCalls.every((toolCall) => toolCall.reason === "duplicate")
) {
return [
`Your previous tool call "${skippedToolCalls[0].name}" was identical to one that already completed.`,
"Retry NOW with different arguments (for read_file, pass a new startLine/endLine for the unread range).",
"Do not ask the user to retry. Do not explain the error.",
].join(" ");
}
const skippedWithRequiredArgs = skippedToolCalls.find((toolCall) => toolCall.required.length > 0);
if (skippedWithRequiredArgs) {
const requiredList = skippedWithRequiredArgs.required.join(", ");
return [
`Your previous tool call "${skippedWithRequiredArgs.name}" was rejected because it was missing required arguments: ${requiredList}.`,
`Retry NOW. Provide a valid JSON object containing ALL of: ${requiredList}.`,
"Do not call any tool with an empty object or missing fields.",
"Do not ask the user to retry. Do not explain the error.",
].join(" ");
}
const firstSkippedToolCall = skippedToolCalls[0];
if (!firstSkippedToolCall) {
return undefined;
}
return [
`Your previous tool call "${firstSkippedToolCall.name}" was rejected due to invalid or incomplete arguments.`,
"Retry NOW with a complete, valid JSON object.",
"Do not emit malformed JSON or empty arguments.",
"Do not ask the user to retry. Do not explain what went wrong.",
].join(" ");
}
export function findTrailingTokenPrefixStart(text: string, token: string): number {
const maxPrefixLength = Math.min(text.length, token.length - 1);
for (let prefixLength = maxPrefixLength; prefixLength > 0; prefixLength -= 1) {
if (text.endsWith(token.slice(0, prefixLength))) {
return text.length - prefixLength;
}
}
return -1;
}
export function findTrailingTokenPrefixStartAny(text: string, tokens: readonly string[]): number {
let bestMatch = -1;
for (const token of tokens) {
const matchIndex = findTrailingTokenPrefixStart(text, token);
if (matchIndex !== -1 && (bestMatch === -1 || matchIndex < bestMatch)) {
bestMatch = matchIndex;
}
}
return bestMatch;
}
export function unwrapJsonCodeFence(text: string): string {
const trimmed = text.trim();
const fencedMatch = trimmed.match(/^```(?:json)?\s*([\s\S]*?)\s*```$/i);
return fencedMatch ? fencedMatch[1].trim() : trimmed;
}
export function isValidToolIdentifier(name: string): boolean {
const trimmed = name.trim();
return trimmed.length > 0 && trimmed.length <= 64 && /^[a-zA-Z0-9_.-]+$/.test(trimmed);
}
export function parseEmbeddedToolParameterValue(rawValue: string): unknown {
const trimmed = rawValue.trim();
Iif (!trimmed) return "";
if (
/^[\\[{\"]/.test(trimmed) ||
/^(?:true|false|null|-?\d+(?:\.\d+)?(?:[eE][+-]?\d+)?)$/.test(trimmed)
) {
try {
return JSON.parse(trimmed);
} catch {
try {
return JSON.parse(jsonrepair(trimmed));
} catch {
return trimmed;
}
}
}
return trimmed;
}
function stripPatternOutsideLiterals(text: string, pattern: RegExp, contextPrefix = ""): string {
const global = new RegExp(
pattern.source,
pattern.flags.includes("g") ? pattern.flags : `${pattern.flags}g`,
);
return text.replace(global, (match, ...rest) => {
const offset = rest[rest.length - 2] as number;
return isTokenInStringOrRegexLiteral(contextPrefix + text, contextPrefix.length + offset)
? match
: "";
});
}
export function stripKnownControlText(text: string, contextPrefix = ""): string {
const controlPatterns = [
/<｜DSML｜[^\s<]*/g,
/<\|DSML\|>[^\s<]*/g,
/<\|python_tag\|>/g,
/<\|start_header_id\|>.*?<\|end_header_id\|>/g,
/<\|eot_id\|>/g,
/<\|eom_id\|>/g,
/<\|im_start\|>[^\n]*/g,
/<\|im_end\|>/g,
/<\|observation\|>/g,
/<\|assistant\|>/g,
/\[gMASK\]/g,
/<sop>/g,
/<eop>/g,
];
let sanitized = text;
for (const pattern of controlPatterns) {
sanitized = stripPatternOutsideLiterals(sanitized, pattern, contextPrefix);
}
const orphanClose = /<\/(?:tool_calls|tool_call|function|parameter|tool_parameter|invoke)>/gi;
if (!sanitized.includes("```")) {
return stripPatternOutsideLiterals(sanitized, orphanClose, contextPrefix);
}
const parts = sanitized.split(/(```[\s\S]*?```)/g);
let walked = contextPrefix;
return parts
.map((part) => {
const next = part.startsWith("```")
? part
: stripPatternOutsideLiterals(part, orphanClose, walked);
walked += part;
return next;
})
.join("");
}
export function parseXmlParameters(content: string): Record<string, unknown> {
const trimmed = content.trim();
Iif (trimmed.startsWith("{") && trimmed.endsWith("}")) {
try {
const parsed = safeJsonParse(trimmed);
Iif (typeof parsed === "object" && parsed !== null && !Array.isArray(parsed)) {
return parsed;
}
} catch {
// Fall through to the tag-stack scan of parameter tags.
}
}
const scanned = scanXmlToolConstruct(
`<tool_call name="_">${content}</tool_call>`,
parseEmbeddedToolParameterValue,
() => true,
);
Iif (scanned.status === "complete" && scanned.toolCall) {
return scanned.toolCall.args;
}
return {};
}
export function extractStandaloneXmlParameters(text: string): {
cleanText: string;
extractedParams: Record<string, unknown>;
} {
return scanStandaloneXmlParameters(text, parseEmbeddedToolParameterValue);
}
export function findControlTextTerminatorIndex(text: string): number {
const terminatorMatch = text.match(/[\s<]/);
return terminatorMatch?.index ?? -1;
}
export function parseDeepSeekTextEmbeddedToolCallContent(
content: string,
): { name: string; argsText: string } | undefined {
const separatorToken = "<｜tool▁sep｜>";
const separatorIndex = content.indexOf(separatorToken);
Iif (separatorIndex === -1) {
return undefined;
}
const afterSeparator = content.slice(separatorIndex + separatorToken.length).trim();
Iif (!afterSeparator) {
return undefined;
}
const newlineIndex = afterSeparator.indexOf("\n");
const name =
newlineIndex === -1 ? afterSeparator.trim() : afterSeparator.slice(0, newlineIndex).trim();
const argsText =
newlineIndex === -1 ? "" : unwrapJsonCodeFence(afterSeparator.slice(newlineIndex).trim());
Iif (!name || !isValidToolIdentifier(name)) {
return undefined;
}
return {
name,
argsText,
};
}
export function parseTextEmbeddedToolCalls(text: string): ParsedTextToolCallResult {
const beginToken = "<|tool_call_begin|>";
const argBeginToken = "<|tool_call_argument_begin|>";
const endToken = "<|tool_call_end|>";
const deepSeekCallsBeginToken = "<｜tool▁calls▁begin｜>";
const deepSeekCallBeginToken = "<｜tool▁call▁begin｜>";
const deepSeekCallEndToken = "<｜tool▁call▁end｜>";
const deepSeekCallsEndToken = "<｜tool▁calls▁end｜>";
const unicodeDsmlToken = "<｜DSML｜";
const asciiDsmlToken = "<|DSML|>";
const partialTokens = [
beginToken,
deepSeekCallsBeginToken,
deepSeekCallBeginToken,
deepSeekCallsEndToken,
unicodeDsmlToken,
asciiDsmlToken,
"<tool_calls>",
"<tool_call",
"<function=",
"<invoke ",
"<parameter=",
"<parameter name=",
"<tool_parameter",
"<|python_tag|>",
"<|start_header_id|>",
"<|im_start|>",
"[gMASK]",
] as const;
const extractedParams: Record<string, unknown> = {};
const segments: ParsedTextSegment[] = [];
let remaining = text;
let incompleteText = "";
const textContextPrefix = (): string =>
segments.map((segment) => (segment.type === "text" ? segment.text : "")).join("");
const appendText = (value: string): void => {
const sanitizedValue = stripKnownControlText(value, textContextPrefix());
if (!sanitizedValue) {
return;
}
const lastSegment = segments.at(-1);
if (lastSegment?.type === "text") {
lastSegment.text += sanitizedValue;
return;
}
segments.push({ type: "text", text: sanitizedValue });
};
while (remaining.length > 0) {
const accumulatedSoFar = textContextPrefix();
const xmlStartIndex = findXmlConstructStart(remaining, accumulatedSoFar);
const isInsideCodeFence = (offset: number): boolean => {
const textUpToOffset = accumulatedSoFar + remaining.slice(0, offset);
const matches = textUpToOffset.match(/```/g);
return matches !== null && matches.length % 2 === 1;
};
const tokenMatches = [
{
kind: "openai" as const,
token: beginToken,
index: indexOfUnquoted(remaining, beginToken, 0, accumulatedSoFar),
},
{
kind: "strip" as const,
token: deepSeekCallsBeginToken,
index: indexOfUnquoted(remaining, deepSeekCallsBeginToken, 0, accumulatedSoFar),
},
{
kind: "deepseek" as const,
token: deepSeekCallBeginToken,
index: indexOfUnquoted(remaining, deepSeekCallBeginToken, 0, accumulatedSoFar),
},
{
kind: "strip" as const,
token: deepSeekCallsEndToken,
index: indexOfUnquoted(remaining, deepSeekCallsEndToken, 0, accumulatedSoFar),
},
{
kind: "control" as const,
token: unicodeDsmlToken,
index: indexOfUnquoted(remaining, unicodeDsmlToken, 0, accumulatedSoFar),
},
{
kind: "control" as const,
token: asciiDsmlToken,
index: indexOfUnquoted(remaining, asciiDsmlToken, 0, accumulatedSoFar),
},
...(xmlStartIndex !== -1
? [{ kind: "xml" as const, token: remaining[xmlStartIndex], index: xmlStartIndex }]
: []),
].filter((match) => match.index !== -1 && !isInsideCodeFence(match.index));
tokenMatches.sort((left, right) => left.index - right.index);
const nextTokenMatch = tokenMatches[0];
if (!nextTokenMatch) {
const partialBeginIndex = findTrailingTokenPrefixStartAny(remaining, partialTokens);
if (
partialBeginIndex === -1 ||
isTokenInStringOrRegexLiteral(
accumulatedSoFar + remaining,
accumulatedSoFar.length + partialBeginIndex,
)
) {
appendText(remaining);
} else {
appendText(remaining.slice(0, partialBeginIndex));
incompleteText = remaining.slice(partialBeginIndex);
}
break;
}
appendText(remaining.slice(0, nextTokenMatch.index));
remaining = remaining.slice(nextTokenMatch.index);
if (nextTokenMatch.kind === "strip") {
remaining = remaining.slice(nextTokenMatch.token.length);
continue;
}
if (nextTokenMatch.kind === "control") {
remaining = remaining.slice(nextTokenMatch.token.length);
const terminatorIndex = findControlTextTerminatorIndex(remaining);
if (terminatorIndex === -1) {
incompleteText = nextTokenMatch.token + remaining;
break;
}
remaining = remaining.slice(terminatorIndex);
continue;
}
if (nextTokenMatch.kind === "xml") {
const scanned = scanXmlToolConstruct(
remaining,
parseEmbeddedToolParameterValue,
isValidToolIdentifier,
);
if (scanned.status === "incomplete") {
incompleteText = remaining;
break;
}
if (scanned.status === "not-a-tag") {
appendText(remaining.slice(0, scanned.skip));
remaining = remaining.slice(scanned.skip);
continue;
}
Iif (scanned.extractedParams) {
Object.assign(extractedParams, scanned.extractedParams);
}
if (scanned.toolCall) {
segments.push({
type: "toolCall",
toolCall: scanned.toolCall,
});
}
remaining = remaining.slice(scanned.consumed);
continue;
}
if (nextTokenMatch.kind === "deepseek") {
const endIndex = remaining.indexOf(deepSeekCallEndToken);
if (endIndex === -1) {
incompleteText = remaining;
break;
}
const callText = remaining.slice(nextTokenMatch.token.length, endIndex);
remaining = remaining.slice(endIndex + deepSeekCallEndToken.length);
const parsedToolCallContent = parseDeepSeekTextEmbeddedToolCallContent(callText);
if (parsedToolCallContent) {
try {
const parsedArgs = parsedToolCallContent.argsText
? parseToolArgumentsStrict(parsedToolCallContent.argsText)
: {};
segments.push({
type: "toolCall",
toolCall: { name: parsedToolCallContent.name, args: parsedArgs },
});
continue;
} catch {
segments.push({ type: "invalidToolCall", name: parsedToolCallContent.name });
continue;
}
}
appendText(`${nextTokenMatch.token}${callText}${deepSeekCallEndToken}`);
continue;
}
// OpenAI format
const argBeginIndex = remaining.indexOf(argBeginToken);
const endIndex = remaining.indexOf(endToken);
if (argBeginIndex === -1 || endIndex === -1 || argBeginIndex > endIndex) {
incompleteText = remaining;
break;
}
const name = remaining.slice(beginToken.length, argBeginIndex).trim();
const argsText = remaining.slice(argBeginIndex + argBeginToken.length, endIndex).trim();
remaining = remaining.slice(endIndex + endToken.length);
Iif (!name || !isValidToolIdentifier(name)) {
continue;
}
try {
segments.push({
type: "toolCall",
toolCall: { name, args: parseToolArgumentsStrict(argsText) },
});
} catch {
segments.push({ type: "invalidToolCall", name });
}
}
return { segments, incompleteText, extractedParams };
}
export function getIncompleteTextToolCallName(text: string): string | undefined {
const openaiBeginToken = "<|tool_call_begin|>";
const openaiArgumentToken = "<|tool_call_argument_begin|>";
const openaiBeginIndex = text.indexOf(openaiBeginToken);
if (openaiBeginIndex !== -1) {
const callText = text.slice(openaiBeginIndex + openaiBeginToken.length);
const argumentIndex = callText.indexOf(openaiArgumentToken);
if (argumentIndex !== -1) {
const name = callText.slice(0, argumentIndex).trim();
return isValidToolIdentifier(name) ? name : undefined;
}
const name = callText.split(/[\s<|]/u, 1)[0]?.trim();
return name && isValidToolIdentifier(name) ? name : undefined;
}
const deepSeekBeginToken = "<｜tool▁call▁begin｜>";
const deepSeekBeginIndex = text.indexOf(deepSeekBeginToken);
if (deepSeekBeginIndex !== -1) {
const callText = text.slice(deepSeekBeginIndex + deepSeekBeginToken.length);
const parsed = parseDeepSeekTextEmbeddedToolCallContent(callText);
const name = parsed?.name?.trim();
return name && isValidToolIdentifier(name) ? name : undefined;
}
const xmlHermesMatch = text.match(/<tool_call>\s*<function=([a-zA-Z0-9_.-]+)/i);
if (xmlHermesMatch) {
return isValidToolIdentifier(xmlHermesMatch[1]) ? xmlHermesMatch[1].trim() : undefined;
}
const xmlStandardMatch = text.match(/<tool_call\s+name="([a-zA-Z0-9_.-]+)"/i);
Iif (xmlStandardMatch) {
return isValidToolIdentifier(xmlStandardMatch[1]) ? xmlStandardMatch[1].trim() : undefined;
}
const xmlInvokeMatch = text.match(/<invoke\s+name="([a-zA-Z0-9_.-]+)"/i);
Iif (xmlInvokeMatch) {
return isValidToolIdentifier(xmlInvokeMatch[1]) ? xmlInvokeMatch[1].trim() : undefined;
}
const xmlFunctionMatch = text.match(/<function=([a-zA-Z0-9_.-]+)/i);
Iif (xmlFunctionMatch) {
return isValidToolIdentifier(xmlFunctionMatch[1]) ? xmlFunctionMatch[1].trim() : undefined;
}
return undefined;
}
export function extractChatRequestContext(
messages: readonly LanguageModelChatMessage[],
): ChatRequestContext | undefined {
const filePattern = /The user's current file is\s+([^\n]+?)\.(?:\s|$)/;
const selectionPattern = /The current selection is from line\s+(\d+)\s+to line\s+(\d+)/;
const cwdPattern = /(?:^|\n)Cwd:\s+([^\n]+)/;
const context: ChatRequestContext = {};
for (let i = messages.length - 1; i >= 0; i -= 1) {
const message = messages[i];
for (const part of message.content) {
const text =
part instanceof vscode.LanguageModelTextPart
? part.value
: typeof part === "object" &&
part !== null &&
"value" in part &&
typeof (part as { value?: unknown }).value === "string"
? (part as { value: string }).value
: undefined;
if (!text) {
continue;
}
const fileMatch = text.match(filePattern);
const selectionMatch = text.match(selectionPattern);
const cwdMatch = text.match(cwdPattern);
if (fileMatch && !context.filePath) {
context.filePath = fileMatch[1].trim();
}
if (cwdMatch && !context.cwd) {
context.cwd = cwdMatch[1].trim();
}
if (selectionMatch && context.startLine === undefined && context.endLine === undefined) {
const startLine = Number(selectionMatch[1]);
const endLine = Number(selectionMatch[2]);
if (Number.isFinite(startLine) && Number.isFinite(endLine)) {
context.startLine = startLine;
context.endLine = endLine;
}
}
Iif (
context.filePath &&
context.cwd &&
context.startLine !== undefined &&
context.endLine !== undefined
) {
break;
}
}
}
return context.filePath ||
context.cwd ||
context.startLine !== undefined ||
context.endLine !== undefined
? context
: undefined;
}
const AUXILIARY_BOOLEAN_FIELDS = new Set(["isregexp", "isregex", "casesensitive", "recursive"]);
function fillMissingAuxiliaryBooleans(
repaired: Record<string, unknown>,
schema: ToolSchema | undefined,
): void {
if (!schema?.required) {
return;
}
for (const key of schema.required) {
const current = repaired[key];
if (current !== undefined && current !== null) {
continue;
}
const property = schema.properties?.[key];
if (property?.type !== "boolean") {
continue;
}
if (!AUXILIARY_BOOLEAN_FIELDS.has(key.toLowerCase())) {
continue;
}
const enumValues = property.enum?.filter((item): item is boolean => typeof item === "boolean");
repaired[key] = enumValues && enumValues.length > 0 ? enumValues[0] : false;
}
}
export function repairToolArguments(
toolName: string,
args: unknown,
requestContext: ChatRequestContext | undefined,
schema?: ToolSchema,
): Record<string, unknown> {
let parsedArgs: Record<string, unknown>;
Iif (typeof args === "string") {
try {
parsedArgs = safeJsonParse(args);
} catch {
parsedArgs = {};
}
} else if (typeof args === "object" && args !== null && !Array.isArray(args)) {
parsedArgs = { ...(args as Record<string, unknown>) };
} else E{
parsedArgs = {};
}
if (!ConfigManager.getToolsConfig().autoRepairArguments) {
return parsedArgs;
}
const required = new Set(schema?.required ?? []);
const needsStringField = (value: unknown, field: string): boolean =>
required.has(field) && (typeof value !== "string" || value.trim().length === 0);
const needsNumberField = (value: unknown, field: string): boolean =>
required.has(field) && typeof value !== "number";
// 1. Merge extracted parameters from XML stream buffer if present
if (requestContext?.extractedParameters) {
for (const [key, value] of Object.entries(requestContext.extractedParameters)) {
if (!(key in parsedArgs) || parsedArgs[key] === undefined || parsedArgs[key] === "") {
parsedArgs[key] = value;
}
}
}
// 2. Resolve common property aliases when required properties are missing
const propertyAliases: Record<string, string[]> = {
filePath: [
"path",
"targetFile",
"target_file",
"file",
"filename",
"file_path",
"filepath",
"uri",
"destination",
"dest",
],
content: ["code", "text", "data", "body", "file_content", "fileContent"],
startLine: ["start", "fromLine", "from_line", "start_line"],
endLine: ["end", "toLine", "to_line", "end_line"],
path: ["directory", "dir", "folder", "cwd", "targetDirectory"],
query: ["pattern", "search_pattern", "searchPattern", "regex", "searchTerm", "search_term"],
command: ["cmd", "script", "commandLine", "command_line"],
};
for (const [canonicalKey, aliases] of Object.entries(propertyAliases)) {
if (
required.has(canonicalKey) &&
(parsedArgs[canonicalKey] === undefined || parsedArgs[canonicalKey] === "")
) {
for (const alias of aliases) {
if (parsedArgs[alias] !== undefined && parsedArgs[alias] !== "") {
parsedArgs[canonicalKey] = parsedArgs[alias];
break;
}
}
}
}
const repaired: Record<string, unknown> = normalizeArguments(parsedArgs, schema ?? {});
const argumentsSchema = schema?.properties?.arguments;
if (
typeof repaired.arguments === "string" &&
(!argumentsSchema || argumentsSchema.type === "object")
) {
try {
repaired.arguments = safeJsonParse(repaired.arguments);
} catch {
// Leave an invalid nested value for schema validation to reject.
}
}
if (
repaired.arguments &&
typeof repaired.arguments === "object" &&
!Array.isArray(repaired.arguments)
) {
const inner = repaired.arguments as Record<string, unknown>;
const outerRequiredKeys = schema?.required ?? [];
const knownPropertyNames = Object.keys(schema?.properties ?? {});
const hasRequiredInInner = outerRequiredKeys.some((k) => k in inner);
const hasKnownPropertyInInner = knownPropertyNames.some((k) => k in inner);
if (!schema?.properties?.arguments && (hasRequiredInInner || hasKnownPropertyInInner)) {
for (const [key, value] of Object.entries(inner)) {
if (!(key in repaired)) {
repaired[key] = value;
}
}
delete repaired.arguments;
}
}
const normalizedToolName = toolName.toLowerCase();
if (
normalizedToolName.includes("terminal") ||
normalizedToolName.includes("command") ||
normalizedToolName.includes("exec") ||
normalizedToolName === "run_in_terminal"
) {
if (needsStringField(repaired.goal, "goal")) {
if (typeof repaired.explanation === "string" && repaired.explanation.trim()) {
repaired.goal = repaired.explanation;
} else IEif (typeof repaired.command === "string" && repaired.command.trim()) {
repaired.goal = `Run: ${repaired.command.slice(0, 60)}`;
}
}
Iif (needsStringField(repaired.explanation, "explanation")) {
Iif (typeof repaired.goal === "string" && repaired.goal.trim()) {
repaired.explanation = repaired.goal;
}
}
Iif (needsStringField(repaired.mode, "mode")) {
repaired.mode = schema?.enumValues?.mode?.[0] ?? "sync";
}
}
fillMissingAuxiliaryBooleans(repaired, schema);
const context = requestContext;
if (!context) {
return normalizeArguments(repaired, schema ?? {});
}
if (normalizedToolName === "read_file") {
if (needsStringField(repaired.filePath, "filePath") && context.filePath) {
repaired.filePath = context.filePath;
}
if (needsNumberField(repaired.startLine, "startLine") && context.startLine !== undefined) {
repaired.startLine = context.startLine;
}
if (needsNumberField(repaired.endLine, "endLine") && context.endLine !== undefined) {
repaired.endLine = context.endLine;
}
} else if (
normalizedToolName.includes("file") ||
normalizedToolName === "create_file" ||
normalizedToolName === "write_file" ||
normalizedToolName === "edit_file"
) {
Iif (needsStringField(repaired.filePath, "filePath") && context.filePath) {
repaired.filePath = context.filePath;
}
Iif (needsNumberField(repaired.startLine, "startLine") && context.startLine !== undefined) {
repaired.startLine = context.startLine;
}
Iif (needsNumberField(repaired.endLine, "endLine") && context.endLine !== undefined) {
repaired.endLine = context.endLine;
}
}
if (
normalizedToolName === "list_dir" ||
normalizedToolName === "grep_search" ||
normalizedToolName === "find_files" ||
normalizedToolName.includes("dir")
) {
if (needsStringField(repaired.path, "path") && context.cwd) {
repaired.path = context.cwd;
}
Iif (needsStringField(repaired.cwd, "cwd") && context.cwd) {
repaired.cwd = context.cwd;
}
}
return normalizeArguments(repaired, schema ?? {});
}
export function isToolCallInput(args: unknown): args is Record<string, unknown> {
return typeof args === "object" && args !== null && !Array.isArray(args);
}
|