Features

Everything below ships in the current version. Nothing here is a roadmap.

A map of your disk

A sunburst of any folder, coloured by rank, with a legend and breadcrumb. Click a ring to zoom in; the breadcrumb takes you back out.
Scans use all your cores and keep a compact index, about 18 bytes per folder, so the next look is instant.
Reveal in Finder, copy the path, or open a Terminal there from any segment.

Attributed: each block counted once, so folders add up to the space in use.
Naive: what du reports, with clones counted in every copy.
Exclusive: what deleting the folder would free right now.
Folders that share blocks with others carry a badge, and Explain names who they share with.

For any folder: how much it references, how much is shared and with which folders, and roughly what deleting it frees.
For git checkouts: unpushed and local-only commits and stashes, so you don't delete work.
Which running programs are working inside it (their current folder).

A background agent samples free space every 5 minutes and forecasts when the disk will be full, with a stated confidence.
It rescans your chosen folders every 6 hours at low priority and names the folders that grew the most.
A notification warns you before the disk fills (rate-limited, so it never nags) and says which folder grew and over what window.
Growth outside the scanned folders, such as snapshots and swap, is shown as its own line rather than hidden.

gigahog status, top, du, explain, growth and forecast, each with a stable --json form.
Warm answers in tens of milliseconds from the saved index.
gigahog help agents prints a guide written for AI coding agents.
The command line is never limited by the trial.

macOS 14 Sonoma or later on Apple silicon.
Full Disk Access is optional: without it, protected folders are marked as not scanned rather than guessed at.