@femtomc/mu-core

Core types and utilities shared across mu packages: JSONL store abstractions, event logging, DAG helpers, and spec schemas.

Install

After publishing:

npm install @femtomc/mu-core
# or: bun add @femtomc/mu-core

From this repo:

cd mu
bun install
bun run build

Usage

import { EventLog, InMemoryJsonlStore, JsonlEventSink, newRunId, runContext } from "@femtomc/mu-core/node";

const jsonl = new InMemoryJsonlStore();
const events = new EventLog(new JsonlEventSink(jsonl));

await runContext({ runId: newRunId() }, async () => {
    await events.emit("demo.event", { source: "readme", payload: { ok: true } });
});

console.log(await jsonl.read());

Tests / Typecheck

From the mu/ repo root:

bun test packages/core
bun run typecheck

Runtime

• @femtomc/mu-core is runtime-agnostic (no Node builtins).
• @femtomc/mu-core/node is Node-only (node:fs, node:async_hooks).
• @femtomc/mu-core/browser is browser-only (IndexedDB/localStorage).