Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add CNaught-Inc/claude-code-plugins/plugin install carbonlogWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/cnaught-inc/claude-code-plugins/cleanup-cache)<a href="https://agentmods.dev/commands/cnaught-inc/claude-code-plugins/cleanup-cache"><img src="https://agentmods.dev/badge/commands/cnaught-inc/claude-code-plugins/cleanup-cache/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/cnaught-inc/claude-code-plugins/cleanup-cache"><img src="https://agentmods.dev/badge/commands/cnaught-inc/claude-code-plugins/cleanup-cache.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00219 |
| Opus 5.5 | $0.00000 | $0.00088 |
| Sonnet 5.5 | $0.00000 | $0.00044 |
| Haiku 4.5 | $0.00000 | $0.00022 |
Grade A, and why
cleanup-cache scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
/carbonlog:cleanup-cache
Clean up old cached plugin versions to free disk space.
Background
Claude Code downloads each plugin version into a separate directory at ~/.claude/plugins/cache/ but never removes old versions. Over time this accumulates stale copies that waste disk space.
This is a known issue:
- https://github.com/anthropics/claude-code/issues/16453
- https://github.com/anthropics/claude-code/issues/25753
What it does
Removes old cached versions of this plugin, keeping:
- The current version (in use by this session)
- The most recent prior version (may still be referenced by another session's statusline)
Script
npx -y bun ${CLAUDE_PLUGIN_ROOT}/src/scripts/carbonlog-cleanup-cache.ts ${CLAUDE_PLUGIN_ROOT}
Display the results to the user. The script outputs JSON with removed (count), kept (version list), and deleted (version list) fields.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 26 lines · 0 tokens per session scan A 4818c530dbe4
cleanup-cache is a command published in the GitHub repository CNaught-Inc/claude-code-plugins (6 stars, last pushed 7mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 219 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
cleanup-cache compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| cleanup-cacheCNaught-Inc/claude-code-plugins | Command | 6 | 7mo ago | Apache-2.0 | A | 0 | Claude Code |
| wsdanielmiessler/LifeOS | Command | 20k | yesterday | MIT | A | 0 | Claude Code |
| cancel-ralphanthropics/claude-plugins-official | Command | 46k | today | Apache-2.0 | A | 4 | Claude Code |
| engage.actionshypnguyen1209/offensive-claude | Command | 412 | 16d ago | MIT | A | 11 | Claude Code |
| focusData-Wise/claude-plugins | Command | 7 | 2d ago | MIT | A | 0 | Claude Code |
| stuckData-Wise/claude-plugins | Command | 7 | 2d ago | MIT | A | 0 | Claude Code |
| quickstartorq-ai/assistant-plugins | Command | 6 | 2d ago | MIT | A | 23 | Claude Code |