# Customize Devbox

> Customize an Ubuntu host through SSH or a Docker Sandbox through sbx.

- Skill: `ikatkov/customize-devbox` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add ikatkov/customize-devbox`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ikatkov/customize-devbox/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: ikatkov (https://skillmd.com/u/ikatkov)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ikatkov/customize-devbox

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# Customize Devbox

Run against an SSH-accessible Ubuntu host:

`scripts/customize_devbox.sh <ssh-target>`

Run against a Docker Sandbox:

`scripts/customize_devbox.sh --sbx <sandbox-name>`

Use `sbx ls` to find sandbox names.

## What it installs

rsub, tmux (+ tpack plugins), a `~/.bashrc` tmux auto-attach block, and a tmux
config that drives the parent terminal (iTerm2) tab title from `~/.tmux/bin/title.sh`.
The title reads `<host>`, `<host> · TICKET` when a Claude session runs in the pane,
and `<host> · TICKET · PR #n` when the branch has an open PR (needs `git` + an
authenticated `gh`; degrades to the bare hostname otherwise).

Editing the title format: `assets/tmux.conf` and `assets/title.sh` are the source
of truth — the script copies them verbatim, so change them here, not on a devbox.