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prompt-guard

prompt-guard is a skill for Claude Code, Codex from KalarisLabs/research-agent-skills. It costs 162 tokens per session (2,998 once invoked), scanned B, original, no licence file.

Classifies text with Meta's Prompt Guard, an 86M-parameter model loaded from HuggingFace, into BENIGN, INJECTION or JAILBREAK labels to detect prompt injections and jailbreak attempts in LLM applications. Covers user input filtering, third-party data and RAG document filtering, batch processing, threshold tuning, and…

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

not rated 105repo today B scan 162 tokens custom licence
Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kalarislabs/research-agent-skills/prompt-guard
View source ↗ KalarisLabs/research-agent-skills docs.kalarislabs.com
Install

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.

Any agent
npx skills add KalarisLabs/research-agent-skills --skill prompt-guard
Clone the repo
git clone --depth 1 https://github.com/KalarisLabs/research-agent-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for prompt-guard

README.md
[![agentmods](https://agentmods.dev/badge/skills/kalarislabs/research-agent-skills/prompt-guard/github.svg)](https://agentmods.dev/skills/kalarislabs/research-agent-skills/prompt-guard)
Your own site
<a href="https://agentmods.dev/skills/kalarislabs/research-agent-skills/prompt-guard"><img src="https://agentmods.dev/badge/skills/kalarislabs/research-agent-skills/prompt-guard/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.

agentmods 80×15 button for prompt-guard

Your own site · 80×15
<a href="https://agentmods.dev/skills/kalarislabs/research-agent-skills/prompt-guard"><img src="https://agentmods.dev/badge/skills/kalarislabs/research-agent-skills/prompt-guard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 162 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,998 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00162 $0.02998
Opus 5.5 $0.00065 $0.01199
Sonnet 5.5 $0.00032 $0.00600
Haiku 4.5 $0.00016 $0.00300

Measured today against content hash ecc2b5452e56, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

prompt-guard scanned grade B with 1 finding 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 today.

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.

score = get_jailbreak_score("Ignore previous instructions")

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/prompt-guard/SKILL.md · 343 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. today First seen · 343 lines · 162 tokens per session scan B ecc2b5452e56

Subscribe to this mod's changes

prompt-guard is a skill published in the GitHub repository KalarisLabs/research-agent-skills (105 stars, last pushed today), with no licence file. It adds 162 tokens to every session and 2,998 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-07.

Data and AIDocumentsSecurityacademic-researchacademic-writingagent-skillsai-agentsbioinformaticscitation-verification
Related

prompt-guard compared with skills from other repositories

prompt-guard next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
prompt-guardKalarisLabs/research-agent-skillsSkill105todaynoneB162Claude Code, Codex
alterlab-markitdownAlterLab-IEU/AlterLab-Academic-SkillsSkill85yesterdayMITA204Claude Code
markitdownK-Dense-AI/scientific-agent-skillsSkill56k4d agoMITA62Claude Code, Codex
aamas-submissionbrycewang-stanford/Awesome-Journal-SkillsSkill1.4k1mo agoMITA79Claude Code
aejpol-replication-packagebrycewang-stanford/Awesome-Journal-SkillsSkill1.4k1mo agoMITA0Claude Code
aejmac-tables-figuresbrycewang-stanford/Awesome-Journal-SkillsSkill1.4k1mo agoMITA0Claude Code
aaai-artifact-evaluationbrycewang-stanford/Awesome-Journal-SkillsSkill1.4k1mo agoMITA47Claude Code