prompt-injection-guard

prompt-injection-guard is a skill for Claude Code, Codex from ArchieIndian/openclaw-superpowers. It costs 23 tokens per session (643 once invoked), scanned B, original, no licence file.

A safety filter for outside content that looks like instructions to the agent. Prompt injection is an attempt to make an agent ignore its real instructions and follow malicious ones.

In plain words
What is it for?
Use it when the agent reads external content that might contain hidden or misleading instructions.
Why use it?
It helps stop untrusted text from changing what the agent does before that text is acted on.

Skill for Claude CodeCodex

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

Good fit Use it when the agent reads external content that might contain hidden or misleading instructions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/archieindian/openclaw-superpowers/prompt-injection-guard
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 ArchieIndian/openclaw-superpowers --skill prompt-injection-guard
Clone the repo
git clone --depth 1 https://github.com/ArchieIndian/openclaw-superpowers

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-injection-guard

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/archieindian/openclaw-superpowers/prompt-injection-guard"><img src="https://agentmods.dev/badge/skills/archieindian/openclaw-superpowers/prompt-injection-guard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 643 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 $0.00023 $0.00643
Opus 5 $0.00012 $0.00321
Sonnet 5 $0.00005 $0.00129
Haiku 4.5 $0.00002 $0.00064

Measured 11d ago against content hash 397973e74538, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

prompt-injection-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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (guard.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

| Role override | "ignore previous instructions", "you are now", "new system prompt" |

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

skills/openclaw-native/prompt-injection-guard/SKILL.md · 65 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

Files

What ships with it

3 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.

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. 11d ago First seen · 65 lines · 23 tokens per session scan B 397973e74538

Subscribe to this mod's changes

prompt-injection-guard is a skill published in the GitHub repository ArchieIndian/openclaw-superpowers (72 stars, last pushed 4mo ago), with no licence file. It adds 23 tokens to every session and 643 once invoked, about $0.0001 per session on Opus 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 2026-08-30.