Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
/plugin marketplace add hashgraph-online/hol-guardnpx agentmods add plugins/hashgraph-online/hol-guard/claude-plugin-goodgit clone --depth 1 https://github.com/hashgraph-online/hol-guardGrade A, and why
claude-plugin-good 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 3d 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
{
"name": "claude-example-plugin",
"version": "1.0.0",
"description": "Example Claude plugin package",
"strict": true
}
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.
- 3d ago First seen · 7 lines scan A cb6418d5138f
claude-plugin-good is a plugin published in the GitHub repository hashgraph-online/hol-guard (504 stars, last pushed 3d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.
Other plugins, from other repositories
safe-example-plugin
Reduced plugin manifest for fixture coverage.
trustshell
AI agent security for Claude Code — read the code, break the running agent, prove it (exploit-validated). Commands: /static-scan, /red-team. Subagent: agent-red-teamer. Skills: RT-1..RT-9.
peephole
A plugin for coding agents. They ship secure code. Steers the write and can ask or deny before a file is saved.
telekey
Give each agent a key scoped to one job that can only narrow, never widen. A prompt-injected agent reaches for a capability it was never given — the call is blocked before it runs. Enforced on every tool call via a PreToolUse hook.
signet
Cryptographic signing for every AI agent tool call — Ed25519 receipts + hash-chained audit log.
vaara marketplace
Vaara runtime tool-call governance plugins for Claude Code.