Skill graveyard

Skill sfrangulov/skill-graveyard/skills/skill-graveyard

Audit which Claude Code skills you actually use — surface dead installs and hallucinated invocations from your session logs.

Install

npx -y skills add sfrangulov/skill-graveyard --skill skill-graveyard

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

7 stars7 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Audit which Claude Code skills you actually invoke. Use when the user wants to find dead/unused skills, hallucinated skill invocations, per-project skill stats, or token cost of installed skill metadata. Triggers on "what skills don't I use?", "clean up my skills", "why didn't this skill work?", "audit skills". Runs locally; reads ~/.claude session JSONL logs. No network calls.

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

1.8 KB, as published. Nobody here has run it

skill-graveyard

CLI that audits Claude Code skill usage. Two signals from one parser:

Dead installs — installed but never invoked → safe to remove.
Hallucinated invocations — invoked but not installed → typos, external-framework registrations, or model tool/skill confusion.

How to invoke

Run via npx skill-graveyard@latest <subcommand> [flags] — no install needed.

Subcommands

audit (default) — classify into active / dead / missing / hallucinated. Flags: --days N, --only <bucket>, --json, --claude-dir <path>.
prune — print removal commands for dead skills. --apply to execute (user/agents only; plugin removals always print only).
suggest — triage hallucinated/missing into actionable buckets.
projects — per-project usage breakdown (cwd from sessions).
cost — token cost estimate of installed metadata vs invocations.
outdated — check installed plugins / git skills for upstream updates (network).

Decision flow

"are there skills I don't use?" → npx skill-graveyard@latest
"clean up unused skills" → prune, then prune --apply
"skill X didn't work" → suggest (look for hallucinated/missing entry)
per-project view → projects
token cost → cost
check updates → outdated

After running, print binary output as-is. Do not summarize unless the user asks.