tsm — ultra-light tmux session manager (Go 1.24)

Features:

• Live built-in fuzzy filter UI (no external fzf)
• Scans Git repos concurrently (one goroutine per scan_paths root)
• Max depth 3 by default
• Session name from folder + parent: /Code/ivuorinen/a → ivuorinen_a
• Existing tmux sessions listed and selectable
• Bookmarked folders always shown
• XDG config, no macOS Library default

Install

go install github.com/ivuorinen/tsm@latest

Usage

• Run tsm → live filter list opens. Type to filter, navigate with keys below, Enter to select.
• Selecting a session switches to it. Selecting a repo/bookmark creates (or reuses) a session and switches/attaches.

Keybindings

Key	Action
↑ / Ctrl-P	Move up
↓ / Ctrl-N	Move down
Home	Jump to first item
End	Jump to last item
PgUp	Move up 5 items
PgDn	Move down 5 items
Backspace	Delete one character from query
Ctrl-U	Clear query
Tab	Toggle preview (path + planned action)
Enter	Select
Ctrl-C	Cancel

tmux key binding (popup)

bind-key t display-popup -E 'tsm' -w 90% -h 80%

Config

XDG-only:

• $XDG_CONFIG_HOME/tsm/config.yaml or fallback $HOME/.config/tsm/config.yaml

Create a default config:

tsm -init-config

Example:

scan_paths:
  - "$HOME/Code"
bookmarks:
  - "$HOME"
exclude_dirs:
  - ".git"
  - "node_modules"
  - "vendor"
  - "dist"
  - "build"
  - "target"
  - "out"
  - "bin"
  - ".cache"
  - ".next"
  - ".nuxt"
  - ".pnpm-store"
  - ".yarn"
  - ".yarn/cache"
  - ".venv"
  - ".direnv"
  - "deps"
  - "_build"
  - ".terraform"
  - ".terragrunt-cache"
  - ".m2"
  - ".gradle"
  - "Pods"
  - "Carthage"
max_depth: 3

Flags

• -config PATH : set explicit config file path
• -print : print candidate list (Kind, Name, Path) and exit
• -init-config : write default config to XDG path and exit

Tests

go test ./...

Tests mock tmux and validate name derivation, fuzzy ranking, scanning (depth/excludes), and tmux command flow.