import type { AnyAgentTool } from "./pi-tools.types.js" ;
export type RequiredParamGroup = {
keys: readonly string[];
allowEmpty?: boolean ;
label?: string;
validator?: (record: Record<string, unknown>) => boolean ;
};
const RETRY_GUIDANCE_SUFFIX = " Supply correct parameters before retrying." ;
function parameterValidationError(message: string): Error {
return new Error(`${message}.${RETRY_GUIDANCE_SUFFIX}`);
}
function describeReceivedParamValue(value: unknown, allowEmpty = false ): string | undefined {
if (value === undefined || value === null ) {
return undefined;
}
if (typeof value === "string" ) {
if (allowEmpty || value.trim().length > 0 ) {
return undefined;
}
return "<empty-string>" ;
}
if (Array.isArray(value)) {
return "<array>" ;
}
return `<${typeof value}>`;
}
function formatReceivedParamHint(
record: Record<string, unknown>,
groups: readonly RequiredParamGroup[],
): string {
const allowEmptyKeys = new Set(
groups.filter((group) => group.allowEmpty).flatMap((group) => group.keys),
);
const received = Object.keys(record).flatMap((key) => {
const detail = describeReceivedParamValue(record[key], allowEmptyKeys.has(key));
if (record[key] === undefined || record[key] === null ) {
return [];
}
return [detail ? `${key}=${detail}` : key];
});
return received.length > 0 ? ` (received: ${received.join(", " )})` : "" ;
}
type EditReplacement = {
oldText: string;
newText: string;
};
function isValidEditReplacement(value: unknown): value is EditReplacement {
if (!value || typeof value !== "object" ) {
return false ;
}
const record = value as Record<string, unknown>;
return (
typeof record.oldText === "string" &&
record.oldText.trim().length > 0 &&
typeof record.newText === "string"
);
}
function hasValidEditReplacements(record: Record<string, unknown>): boolean {
const edits = record.edits;
return (
Array.isArray(edits) &&
edits.length > 0 &&
edits.every((entry) => isValidEditReplacement(entry))
);
}
export const REQUIRED_PARAM_GROUPS = {
read: [{ keys: ["path" ], label: "path" }],
write: [
{ keys: ["path" ], label: "path" },
{ keys: ["content" ], label: "content" },
],
edit: [
{ keys: ["path" ], label: "path" },
{ keys: ["edits" ], label: "edits" , validator: hasValidEditReplacements },
],
} as const ;
export function getToolParamsRecord(params: unknown): Record<string, unknown> | undefined {
return params && typeof params === "object" ? (params as Record<string, unknown>) : undefined;
}
export function assertRequiredParams(
record: Record<string, unknown> | undefined,
groups: readonly RequiredParamGroup[],
toolName: string,
): void {
if (!record || typeof record !== "object" ) {
throw parameterValidationError(`Missing parameters for ${toolName}`);
}
const missingLabels: string[] = [];
for (const group of groups) {
const satisfied =
group.validator?.(record) ??
group.keys.some((key) => {
if (!(key in record)) {
return false ;
}
const value = record[key];
if (typeof value !== "string" ) {
return false ;
}
if (group.allowEmpty) {
return true ;
}
return value.trim().length > 0 ;
});
if (!satisfied) {
const label = group.label ?? group.keys.join(" or " );
missingLabels.push(label);
}
}
if (missingLabels.length > 0 ) {
const joined = missingLabels.join(", " );
const noun = missingLabels.length === 1 ? "parameter" : "parameters" ;
const receivedHint = formatReceivedParamHint(record, groups);
throw parameterValidationError(`Missing required ${noun}: ${joined}${receivedHint}`);
}
}
export function wrapToolParamValidation(
tool: AnyAgentTool,
requiredParamGroups?: readonly RequiredParamGroup[],
): AnyAgentTool {
return {
...tool,
execute: async (toolCallId, params, signal, onUpdate) => {
const record = getToolParamsRecord(params);
if (requiredParamGroups?.length) {
assertRequiredParams(record, requiredParamGroups, tool.name);
}
return tool.execute(toolCallId, params, signal, onUpdate);
},
};
}
Messung V0.5 in Prozent C=99 H=97 G=97
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-05-26)
¤
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