Clean C Drive
Guided WizTree C: drive cleanup with red lines, backup and rollback
Test report
- Verdict
- Works with setup
- Score
- Tested
- Aug 5, 2026
- Environment
- Claude Code 2.x (agent harness)
⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Aug 5, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.
Fed analyze.py a synthetic 22-row WizTree export and compared its output against my own unaided triage of the same CSV, written first: the analyzer silently excluded all four items the no-skill pass had recommended deleting — Windows\Installer, ProgramData\Package Cache, WinSxS and System Volume Information, roughly 46 GB of genuinely destructive advice — and instead surfaced the 4.7 GB single kernel dump and the 4 GB Chrome on-device AI model I had missed entirely, the latter with a note to disable the chrome://flags option so it does not re-download. It also demotes IndexedDB to a login-loss risk rather than counting it as free space, and left the 18 GB of WeChat file receipts alone. Only that half is verifiable off Windows: scan.py needs an admin shell plus a WizTree binary you download yourself, and backup.py needs a second physical drive with 5 GB free, so the scan-backup-execute end of the workflow went untested. One mis-tiering showed up — .gradle\caches lands in the medium bucket as a generic "app cache" instead of its own low-priority entry — and the repo README's own "cd -disk-cleaner" step fails outright because bash reads the leading dash as an option.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 5/5
- Triggers reliably 5/5
- Output vs. baseline 8/10
- Docs & honesty 3/5
What Clean C Drive does
A cautious Windows C: drive cleanup workflow: WizTree scans the drive, a bundled Python analyzer tiers the results into high/medium/low reclaimable space while excluding a hardcoded red-line list, and nothing is deleted until you approve it item by item and a backup has been taken. Triggers on "C drive is full", "system drive out of space", or "safely free up disk space" on Windows. Windows only, needs an administrator shell and a WizTree binary you supply yourself; documentation is Simplified Chinese.
How to install Clean C Drive
Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.
Commands — how to trigger Clean C Drive
-
/clean-c-driveGuided WizTree C: drive cleanup with red lines, backup and rollback
It also activates on plain-language prompts like these:
-
My Windows C: drive is almost full, what can I safely delete? -
我的电脑 C盘马上就要满了，帮我安全清理一下磁盘空间，千万别删到系统重要文件和个人资料 -
System drive only has 5GB left, safely free up disk space
Frequently asked questions
- Is the Clean C Drive skill free?
- Yes. The skill itself is free from iziqing/-disk-cleaner. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Clean C Drive work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Aug 5, 2026. Verdict: Works with setup. Fed analyze.py a synthetic 22-row WizTree export and compared its output against my own unaided triage of the same CSV, written first: the analyzer silently excluded all four items the no-skill pass had recommended deleting — Windows\Installer, ProgramData\Package Cache, WinSxS and System Volume Information, roughly 46 GB of genuinely destructive advice — and instead surfaced the 4.7 GB single kernel dump and the 4 GB Chrome on-device AI model I had missed entirely, the latter with a note to disable the chrome://flags option so it does not re-download. It also demotes IndexedDB to a login-loss risk rather than counting it as free space, and left the 18 GB of WeChat file receipts alone. Only that half is verifiable off Windows: scan.py needs an admin shell plus a WizTree binary you download yourself, and backup.py needs a second physical drive with 5 GB free, so the scan-backup-execute end of the workflow went untested. One mis-tiering showed up — .gradle\caches lands in the medium bucket as a generic "app cache" instead of its own low-priority entry — and the repo README's own "cd -disk-cleaner" step fails outright because bash reads the leading dash as an option.
- What is the Clean C Drive SkillProof Score?
- 8.4/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 3/5.
- How do I install Clean C Drive?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Clean C Drive with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.