arkantu-core-tools

import { readFile, writeFile, mkdir, appendFile } from "fs/promises";
import { join } from "path";
import * as os from "os";

const STATE_DIR = join(os.homedir(), ".arkantu-core-tools");
const STATE_FILE = join(STATE_DIR, "state.json");

export interface PluginState {
  cwd: string;
}

export async function loadState(defaultCwd: string): Promise<PluginState> {
  try {
    const raw = await readFile(STATE_FILE, "utf-8");
    const parsed = JSON.parse(raw);
    return { cwd: parsed.cwd ?? defaultCwd };
  } catch {
    return { cwd: defaultCwd };
  }
}

export async function saveState(state: PluginState): Promise<void> {
  try {
    await mkdir(STATE_DIR, { recursive: true });
    await writeFile(STATE_FILE, JSON.stringify(state, null, 2), "utf-8");
  } catch (e) {
    console.error("[state] Failed to save state:", e);
  }
}

export async function ensureDir(path: string): Promise<void> {
  await mkdir(path, { recursive: true });
}

export async function appendMemory(cwd: string, fact: string): Promise<void> {
  const memFile = join(cwd, "memory.md");
  const entry = `\n- [${new Date().toISOString()}] ${fact}`;
  try {
    await appendFile(memFile, entry, "utf-8");
  } catch {
    await writeFile(memFile, `# Memoria\n${entry}`, "utf-8");
  }
}