Sessions, folding and sticky scroll in Skink

Fold a block, fold everything, open it all again.

Run skink with no arguments inside a project and it reopens what you had when you last quit there: files, cursors, split panes, the file tree and shells.

For folding, press Alt+M (or :fold) to fold or unfold the block at the cursor, and Alt+Shift+M (or :unfoldall) to open every fold.

Restore your last session

A project is a folder with .git, Cargo.toml, package.json, go.mod, pyproject.toml or build.zig, or any folder below one. Running skink with no arguments there restores:

the open files and their cursors
split panes
the file tree and its open folders
shells, started again in their last folder (programs that were running in them are not restarted)
extra roots added with :addroot

Start fresh without losing the session

Opening a specific file or folder (skink src/main.rs, skink .) starts fresh and does not overwrite the saved session. So you can do a quick edit without losing your setup.

Turn sessions off

{ "restoresession": false }

Unsaved work after a crash

Separate from sessions, Skink backs up unsaved edits after a 3 second pause. If Skink or the terminal crashes, opening the file again offers (r)ecover or (d)iscard.

Fold code

Folding works by indentation, so it works in any language.

Key	Typed command	Does
`Alt`+`M`	`:fold`	Fold or unfold the block at the cursor
	`:foldall`	Fold every top-level block
`Alt`+`Shift`+`M`	`:unfoldall`	Open every fold

A closed fold shows a mark in the gutter (click it to open the fold) and “N lines” after its first line.

The cursor steps over a closed fold. Jumping into one, with search or go to line, opens it.

Sticky scroll

The headers of the blocks you are scrolled into (the function, the impl, the class) stay pinned at the top of the editor. Click one to jump to it.

Turn it off with:

{ "stickyscroll": false }

Rulers

Draw vertical lines at given columns:

{ "rulers": [80, 100] }

Micro’s "colorcolumn": 80 works too.

Jump back and forward

Skink remembers where you were before a jump: go to definition, a result, quick open, :goto.

Key	Typed command	Does
`Alt`+`U`	`:back`	Back to where you were before the jump
`Alt`+`Shift`+`U`	`:forward`	Forward again

Scrollbar marks

The scrollbar in the editor’s last column marks, across the whole file:

errors (red)
warnings (yellow)
find matches (orange)
the cursor (blue)

Multiple project roots

:addroot DIR adds another folder below the main root in the file tree. Quick open and project search cover it too, and the session remembers it.

:removeroot [DIR] removes it again. Without an argument it removes the one selected in the tree.