Reminder to Use the Boxdown CLI to Configure Your ChatGPT... ![rw-book-cover](https://pbs.twimg.com/profile_images/1403728787011948546/Xde0L7Tk.jpg) 🔗 **Source:** [Reminder to Use the Boxdown CLI to Configure Your ChatGPT...](https://twitter.com/liran_tal/status/2098691590923358547/?rw_tt_thread=True) > [!note]+ Document Notes > tags: [coding-agents, devcontainers, developer-tools, agent-sandboxing] > author: Liran Tal > source: X (@liran_tal) > reference: https://twitter.com/liran_tal/status/2098691590923358547 > date created: 2026-09-12 > > > [!info] Generated analysis — not the author's words. Sections below are machine-written > > from the captured source. Only text inside `> [!quote]` blocks is verbatim from the author. > > Do not quote or attribute any other line to the named author. > > <!-- deep-read: light-touch --> > Light-touch by design: a 45-word, three-post thread with a terminal screenshot. It's a tool pointer, checked here against npm and GitHub. > > # 🏷️ Title: Reminder to use the boxdown CLI for coding agents > <!-- deep-read:sections start --> ## 📝 Summary Liran Tal recommends boxdown, an open source CLI that sets up local isolated container environments for coding agents, naming ChatGPT Codex, Claude Code, and Cursor. The screenshot shows `boxdown setup` running in a `lockfile-lint` workspace. ## 🗒️ Who said what **Liran Tal** (@liran_tal): > [!quote] > reminder to use the boxdown CLI to configure your ChatGPT Codex or Claude Code to use local isolated container environments for agentic work (magically sets everythig up for ya!) > [!quote] > yes, it's open source 🎉 > [!quote] > p.s. Cursor is supported too if you're a fan of it ## 🔗 Verified details (2026-09-12) - **npm:** `boxdown` version 4.3.1, described as "Run a reusable devcontainer sandbox for any local project." Maintainer `lirantal`; first published 2026-06-21, last modified 2026-08-10. - **GitHub:** `lirantal/boxdown`, "CLI for Local Isolated Environments for Coding Agents," 29 stars, created 2026-06-21. The package and repo belong to the tweet's author, which the tweet doesn't say. - **Screenshot steps:** check host readiness; offer optional SSH targets (register the SSH alias as a Codex app remote project or a Claude app SSH remote); prepare an SSH identity; write a generated devcontainer config; start the devcontainer; install an SSH alias; install the Codex SSH target. ## ⚖️ What it does not establish - **Isolation strength.** "Isolated" here means a devcontainer. The thread gives no threat model, and a container sharing the host's Docker daemon isn't equivalent to VM isolation. - **Host changes.** Per the screenshot, setup creates an SSH identity and alias on the host. Read what it writes before running it. - **License.** "Open source" is stated without naming a license; check the repo. ## 🎯 Conclusion A maintainer's pointer to a real, recently published tool for running Codex and Claude Code inside devcontainers. Worth a trial for agent work in plugin repos, after reading its README and the SSH and devcontainer files it generates. <!-- deep-read:sections end --> 📄 **Full text:** [[Full Document Contents/Tweets/Reminder to Use the Boxdown CLI to Configure Your ChatGPT....md|Reminder to Use the Boxdown CLI to Configure Your ChatGPT... by Liran Tal]] ## Highlights - reminder to use the boxdown CLI to configure your ChatGPT Codex or Claude Code to use local isolated container environments for agentic work (magically sets everythig up for ya!) ([View Highlight](https://read.readwise.io/read/01m2aztf5gp1qam5t0yn9kj5s7)) - Note: Verified: npm boxdown 4.3.1, maintainer lirantal, repo github.com/lirantal/boxdown, created 2026-06-21. - Tags: action/h2