StorageSaver

Watch and explain Mac disk usage. Use when the user asks about Mac storage/disk space ("what's eating my disk?", "disk full", "free up space"), wants a visual map of what's on the disk, or wants scheduled storage watching with alerts. Read-only by design: it recommends copy-paste commands, it never deletes anything itself.

StorageSaver watcher

StorageSaver is a read-only Mac disk scanner that produces an interactive HTML map (sunburst + tree) with plain-English explanations and safety badges (safe / review / never-touch), plus this watcher script for scheduled checks.

Install / one-off scan

bash

npx storagesaver            # scan → storagesaver.html in cwd → opens in browser
npx storagesaver --quick    # home-folder-only fast pass

For a scheduled setup, clone or install the package once so watcher.js and the CLI are on disk:

bash

npm install -g storagesaver
# watcher lives at <install>/skill/watcher.js

Answering "what's eating my disk?"

1. Run npx storagesaver scan --no-open --out /tmp/storagesaver.html (45–90s for a full disk walk).
2. Open or attach the HTML. The severity summary and top easy wins are in the map; green ⧉ buttons carry copy-paste reclaim commands.
3. Never run the reclaim commands yourself unless the user explicitly asks; present them for the user to run.

Scheduled watching (weekly cron)

The watcher gathers, classifies, and only speaks when it matters:

• Severity tiers (% used on the data volume): <70% silent, 70–84% heads-up, 85–94% getting tight, >=95% urgent.
• Debounce: same severity bucket within 6 days of the last alert → stays quiet (no weekly nagging about the same state). --force overrides.

Plain cron example:

cron

0 10 * * 1 NOTIFY_CMD='mail -s "Mac storage" [e-mail]' node /path/to/skill/watcher.js

OpenClaw agent example — schedule it as a command cron so the agent delivers the result rather than re-planning the work:

bash

openclaw cron add --name storage-watch --schedule "0 10 * * 1" \
  --command "node /path/to/StorageSaver/skill/watcher.js" \
  --deliver

Notification channel

NOTIFY_CMD is any shell command: the alert message is piped to stdin and the freshly generated storagesaver.html path is passed as $1. Attach that HTML to whatever channel you notify on (email attachment, chat upload, etc.) — the one-line alert says what to do first; the map is where the user digs. Without NOTIFY_CMD the message goes to stdout.

State, logs, and JSON reports live under ~/.config/storagesaver/.

Verify-before-flagging-apps playbook

Never tell the user an app is "unused" from file timestamps alone. Background utilities (window managers, launchers, clipboard managers) rarely rewrite their prefs while running 24/7. Before flagging any app:

1. Is it running right now? Match by executable path, not name:

   bash

   pgrep -f "/Applications/<App>.app/Contents/MacOS"
   

2. Is it a login item? The user explicitly wants those auto-started:

   bash

   osascript -e 'tell application "System Events" to get the name of every login item'
   

3. Last-used signals, best first: Spotlight's mdls -name kMDItemLastUsedDate -raw <App>.app beats prefs-plist mtime when present (it records actual opens); fall back to ~/Library/Preferences/<bundleId>.plist mtime, the app's ~/Library/Containers/<bundleId> mtime, and Saved Application State. Take the MOST RECENT signal — the generous estimate.
4. Helper-style apps launched by other tools (diff viewers via git difftool, etc.) leave almost no signals — always phrase these as "confirm before deleting", never as certain.

The watcher already implements all of this; the playbook is for when you investigate manually or the user questions a finding.

Safety rules the recommendations follow

• Docker's Docker.raw is a grow-only sparse VM disk: docker system prune will NOT shrink it — purge via Docker Desktop.
• With Messages in iCloud ON, lowering "Keep messages" deletes history from iCloud on ALL devices — only the render cache is safe to clear.
• ~/Library/CloudStorage is live cloud data: a local rm there is a cloud delete. Reclaim Google Drive space by reconnecting in Stream mode, never by deleting files.
• Photos libraries are managed by Photos.app — never touch in Finder.
• Users can add their own rules in ~/.config/storagesaver/rules.json (see the project README).