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 bengous/claude-code-plugins/plugin install plugin-cache-syncWrote 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/skills/bengous/claude-code-plugins/usage)<a href="https://agentmods.dev/skills/bengous/claude-code-plugins/usage"><img src="https://agentmods.dev/badge/skills/bengous/claude-code-plugins/usage/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/skills/bengous/claude-code-plugins/usage"><img src="https://agentmods.dev/badge/skills/bengous/claude-code-plugins/usage.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 | $0.00015 | $0.00522 |
| Opus 5.5 | $0.00006 | $0.00209 |
| Sonnet 5.5 | $0.00003 | $0.00104 |
| Haiku 4.5 | $0.00002 | $0.00052 |
Grade A, and why
plugin-cache-sync-usage scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
plugin-cache-sync
Sync Claude Code plugin cache from local sources.
To test a plugin under edit, prefer claude --plugin-dir /path/to/plugin: it reads
the source directly, needs no version bump, and writes nothing to the cache. Use
sync only to make an edit live in ordinary sessions launched without flags.
Current Status
!"${CLAUDE_PLUGIN_ROOT}/scripts/plugin-cache-sync" version 2>&1 || echo "(plugin-cache-sync not available)"
!"${CLAUDE_PLUGIN_ROOT}/scripts/plugin-cache-sync" status 2>&1 || echo "(could not get status)"
Workflow
- Check status:
plugin-cache-sync status— shows which plugins are stale and which are enabled - Sync one plugin:
plugin-cache-sync sync <name>— partial name match (e.g.plugin-cache-sync sync meta) - Sync all:
plugin-cache-sync sync --all - Enable a new plugin:
claude plugin enable <name>@<marketplace>—syncdoes not touchsettings.json, so a brand-new plugin must be enabled once before Claude Code will load it - Restart Claude Code —
/reload-pluginsreports success and keeps serving the definitions loaded at startup, so a synced change stays invisible until you restart
syncwarns when a plugin is synced but not enabled.
Standalone Mode
For repos not registered as a known marketplace:
- CWD auto-detection: if
$PWD/.claude-plugin/marketplace.jsonexists, plugin-cache-sync uses it automatically - Explicit source:
plugin-cache-sync --source /path/to/repo sync --all
Installation
Run /plugin-cache-sync:install to add plugin-cache-sync to your PATH.
On Windows, run /plugin-cache-sync:update after plugin updates to re-copy the script.
Key Paths
| Path | Purpose |
|---|---|
~/.claude/plugins/cache/ |
Plugin cache (what plugin-cache-sync syncs) |
~/.claude/plugins/installed_plugins.json |
Installed plugin registry |
~/.claude/plugins/known_marketplaces.json |
Marketplace sources |
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.
- 1mo ago Changed 09de8187cd19
- 1mo ago First seen · 52 lines · 15 tokens per session scan A d7be87ddc32d
plugin-cache-sync-usage is a skill published in the GitHub repository bengous/claude-code-plugins (5 stars, last pushed today), licensed MIT. It adds 15 tokens to every session and 522 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-03.
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