---
schema: 4
type: case
id: 16
title: "Open‑source memory and guardrails for the coding agent you already use"
description: "A free command-line tool that gives Claude Code, Codex and other coding agents durable knowledge, memory and guardrails as plain markdown."
created: 2026-10-20
updated: 2026-10-20
attributes:
  channels: [website]
  status: published
  motif: memory
  kind: own
  client: "h1902y"
  year: 2026
  state: "Open source"
  stack: ["Node.js", "TypeScript", "OpenTelemetry", "Markdown"]
  timeline: "Public since June 2026"
---

## Problem

Coding agents forget what they learned and repeat mistakes. Teams have no simple way to grow an agent’s knowledge safely over time.

## What we built

- A command-line tool that sets up memory, actions and guardrails for the agent you already run
- Notes stored as plain markdown, grown through a loop where a human approves what the agent learns
- Tracing with OpenTelemetry, host hooks that gate risky actions, and a web workbench
- No runtime dependencies, MIT licence, published on npm

## Outcome

- Built in public since June 2026, with over a thousand commits
- Works with Claude Code, Codex, Gemini CLI, OpenCode and pi