@sema-agent/core/dist/core/runner/finish-reason-seat.js

Stateless, task-oriented AI agent core

import { deliverEngineNotice } from "../engine-notice.js";
import { readMember } from "../thrown-value.js";
export function createFinishReasonSeat(onNotice, ids) {
    const announced = new Set();
    const once = (key) => {
        if (announced.has(key))
            return false;
        announced.add(key);
        return true;
    };
    return {
        observe(message) {
            const word = readMember(message, "finishReasonUnknown");
            if (typeof word === "string" && once(`unknown\u0000${word}`)) {
                deliverEngineNotice(onNotice, {
                    code: "route.finish_reason_unknown",
                    message: `The provider ended a response with "${word}", a finish reason this engine does not read. The turn was kept ` +
                        `as the model left it, but the provider may have cut it short — the text above may be incomplete.`,
                    detail: { finishReason: word, sessionId: ids.sessionId, runId: ids.runId },
                });
            }
            const late = readMember(message, "streamEndIgnored");
            const statement = readMember(late, "statement");
            const lateWord = readMember(late, "word");
            const frames = readMember(late, "frames");
            if ((statement === "ending" || statement === "error" || statement === "content") &&
                typeof lateWord === "string" &&
                typeof frames === "number" &&
                once(`late\u0000${statement}\u0000${lateWord}`)) {
                const what = statement === "error" ? `an error "${lateWord}"` : statement === "ending" ? `the ending "${lateWord}"` : `${lateWord} content`;
                deliverEngineNotice(onNotice, {
                    code: "route.stream_end_ignored",
                    message: `After the provider had already ended a response, its stream sent more (first: ${what}; ${frames} frame${frames === 1 ? "" : "s"} in all). ` +
                        `The first ending stands; nothing after it was added to the turn.`,
                    detail: { statement, word: lateWord, frames, sessionId: ids.sessionId, runId: ids.runId },
                });
            }
        },
    };
}