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 skills add nrwl/polygraph-skills --skill polygraphgit clone --depth 1 https://github.com/nrwl/polygraph-skillsWrote 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/nrwl/polygraph-skills/polygraph)<a href="https://agentmods.dev/skills/nrwl/polygraph-skills/polygraph"><img src="https://agentmods.dev/badge/skills/nrwl/polygraph-skills/polygraph/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/nrwl/polygraph-skills/polygraph"><img src="https://agentmods.dev/badge/skills/nrwl/polygraph-skills/polygraph.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 | $0.00239 | $0.08919 |
| Opus 5.5 | $0.00096 | $0.03568 |
| Sonnet 5.5 | $0.00048 | $0.01784 |
| Haiku 4.5 | $0.00024 | $0.00892 |
Grade D, and why
polygraph scanned grade D with 3 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- opencode-only gate. Claude and Codex parents handle permission gates via the native MCP elicitation dialog and never see permission-required tasks in the polling loop — these instructions are noise for them. This ga Subtle steeringmediumPrompt injection
Instructions that bias recommendations or shape behaviour without the user noticing.
There are three cases. Pick exactly one before calling any tool. The case labels are internal routing shorthand — never mention them in anything you show the user. Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- CIPE_URL: from `ciStatus[prId].cipeUrl` (null if no CIPE — omit the CI Link cell) — a human-facing Nx Cloud link: render it for the user, never fetch, curl, or poll it. CIPE data is only reachable via the Nx MCP `ci_in 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
7 files 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.
- 1mo ago Changed · +1 lines eea5326b564e
- 1mo ago Changed · +1 lines dbddabd62cbe
- 1mo ago Changed · +1 lines 25e1cbee0401
- 1mo ago First seen · 398 lines · 239 tokens per session scan D bed56a64e8e6
polygraph is a skill published in the GitHub repository nrwl/polygraph-skills (14 stars, last pushed 29d ago), with no licence file. It adds 239 tokens to every session and 8,919 once invoked, about $0.0010 per session on Opus 5.5. A static security scan graded it D with 3 findings (hidden instructions, subtle steering, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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