theprimeagen/skills/tmux-dev
skills/tmux-dev/SKILL.md
Tmux-based dev.sh script conventions
$ install --global
skillsauthnpx skillsauth add theprimeagen/skills skills/tmux-devInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- description:
- Tmux-based dev.sh script conventions
- globs:
- dev.sh
- alwaysApply:
- false
Tmux Dev Scripts
Rules
- Assign each long-running process (database, dev server, etc.) a dedicated high-numbered window (e.g. 8, 9) and kill any stale instance with
tmux kill-window -t "$SESSION:$WIN" 2>/dev/null || truebefore creating a new one.
- the highest number should be 9, so if there are 3 processes, 7, 8, and 9 should be the windows
- When a process must be healthy before the next step (e.g. Postgres before migrations), poll in a bounded loop (
for i in $(seq 1 N)) with asleepbetween attempts andexit 1on timeout — never assume instant readiness. - End every
tmux new-windowcommand string with; exec bashso the window stays open for inspection if the process exits.
Example 1: Full dev.sh with database + worker
#!/usr/bin/env bash
set -euo pipefail
DIR="$(cd "$(dirname "$0")" && pwd)"
SESSION="${TMUX_SESSION:-$(tmux display-message -p '#S')}"
PG_WIN="8"
DEV_WIN="9"
LOCAL_DB="postgresql://postgres:postgres@localhost:54321/myapp"
for win in "$PG_WIN" "$DEV_WIN"; do
tmux kill-window -t "$SESSION:$win" 2>/dev/null || true
done
tmux new-window -t "$SESSION:$PG_WIN" -n "postgres" -c "$DIR" "bun run db:local; exec bash"
echo "Waiting for postgres on port 54321..."
for i in $(seq 1 30); do
if DATABASE_URL="$LOCAL_DB" bun run db:migrate 2>/dev/null; then break; fi
if [ "$i" -eq 30 ]; then echo "Timed out waiting for postgres" >&2; exit 1; fi
sleep 1
done
echo "Migrations applied."
tmux new-window -t "$SESSION:$DEV_WIN" -n "dev" -c "$DIR" "bun run dev; exec bash"
Example 2: Adding a third window (e.g. frontend dev server)
UI_WIN="7"
tmux kill-window -t "$SESSION:$UI_WIN" 2>/dev/null || true
tmux new-window -t "$SESSION:$UI_WIN" -n "ui" -c "$DIR" "bun run dev:ui; exec bash"
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