---
title: "Build log 01: Two weeks, two Claude Code tools"
description: "Shipped jev-guard, guardrails that make Claude Code check its claims. Shipped tenx-mess, a skill that cleans up what agents leave behind. Starred simslim and xprem, for more iOS simulators and self-hosted Expo updates."
date: 2026-10-05
canonical: "https://www.omc345.com/build-log/01/"
draft: true
---

# Build log 01: Two weeks, two Claude Code tools

I shipped two Claude Code tools in these two weeks. Both are public on GitHub.

## jev-guard

[jev-guard](https://github.com/muratcakmak/jev-guard) went up on 22 September. It adds probability-scored guardrails to Claude Code. It denies edits that break your rules and deploys you did not ask for. It routes your docs into each prompt. At the end of a turn, it checks the final answer against the evidence from that turn.

The guard sends each check to [Jev](https://typesafe.ai), a cheap model that answers a question with a probability instead of a yes or no. It challenges Claude’s claims and makes Claude verify what it says before it declares the work done.

```sh
git clone https://github.com/muratcakmak/jev-guard ~/.claude/plugins/jev-guard
```

## tenx-mess

[tenx-mess](https://github.com/muratcakmak/tenx-mess) followed on 28 September. Agents ship at 10x speed and leave a 10x mess. This skill finds leftover git worktrees, node_modules, Xcode DerivedData and package caches on macOS. It deletes them only after you approve twice. On the first day I added a confirmation page, so a cleanup now starts from an Approve button.

```sh
/plugin marketplace add muratcakmak/tenx-mess
```

## Starred

[simslim](https://github.com/MobAI-App/simslim) lets you run more iOS simulators on one Mac. It turns off background daemons that a simulator does not need. [xprem](https://github.com/mercuretechnologies/xprem) is a self-hosted alternative to EAS Update. It uses the official Expo Updates protocol.