agentcrumbs/dist/esm/cli/cursor.js

Debug mode for any agent.

import fs from "node:fs";
import path from "node:path";
import os from "node:os";
import { createHash } from "node:crypto";
const CURSOR_FILE = path.join(os.homedir(), ".agentcrumbs", ".cursors.json");
const MAX_CURSORS = 50;
const CURSOR_TTL = 60 * 60 * 1000; // 1 hour
function readCursors() {
    try {
        return JSON.parse(fs.readFileSync(CURSOR_FILE, "utf-8"));
    }
    catch {
        return {};
    }
}
function writeCursors(cursors) {
    const dir = path.dirname(CURSOR_FILE);
    if (!fs.existsSync(dir)) {
        fs.mkdirSync(dir, { recursive: true });
    }
    fs.writeFileSync(CURSOR_FILE, JSON.stringify(cursors));
}
function generateId(ts, offset) {
    const hash = createHash("sha256").update(`${ts}:${offset}`).digest("hex");
    return hash.slice(0, 8);
}
function pruneOld(cursors) {
    const now = Date.now();
    const entries = Object.entries(cursors)
        .filter(([, v]) => now - v.createdAt < CURSOR_TTL)
        .sort((a, b) => b[1].createdAt - a[1].createdAt)
        .slice(0, MAX_CURSORS);
    return Object.fromEntries(entries);
}
export function saveCursor(ts, offset) {
    const id = generateId(ts, offset);
    const cursors = pruneOld(readCursors());
    cursors[id] = { ts, offset, createdAt: Date.now() };
    writeCursors(cursors);
    return id;
}
export function resolveCursor(id) {
    const cursors = readCursors();
    return cursors[id];
}
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