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security-sentinel

security-sentinel is an agent for Claude Code from mantacron/manta. It costs 58 tokens per session (5,522 once invoked), scanned A, original, no licence file.

A security-audit agent for checking code changes for common application-security problems, including the OWASP Top 10 list of web risks.

In plain words
What is it for?
Auditing changes for hardcoded credentials, injection flaws, insecure data exposure, server-side request forgery, path traversal, and related risks.
Why use it?
It helps identify security issues such as leaked secrets, injection, unsafe authentication, and vulnerable dependencies before code is committed.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

not rated 10repo changed 1mo ago A scan 58 tokens custom licence

Good fit Auditing changes for hardcoded credentials, injection flaws, insecure data exposure, server-side request forgery, path traversal, and related risks.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mantacron/manta/security-sentinel
View source ↗ mantacron/manta mantacron.github.io
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.

Clone the repo
git clone --depth 1 https://github.com/mantacron/manta

Made for: Claude Code.

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 security-sentinel

README.md
[![agentmods](https://agentmods.dev/badge/agents/mantacron/manta/security-sentinel/github.svg)](https://agentmods.dev/agents/mantacron/manta/security-sentinel)
Your own site
<a href="https://agentmods.dev/agents/mantacron/manta/security-sentinel"><img src="https://agentmods.dev/badge/agents/mantacron/manta/security-sentinel/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 security-sentinel

Your own site · 80×15
<a href="https://agentmods.dev/agents/mantacron/manta/security-sentinel"><img src="https://agentmods.dev/badge/agents/mantacron/manta/security-sentinel.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,522 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00058 $0.05522
Opus 5.5 $0.00023 $0.02209
Sonnet 5.5 $0.00012 $0.01104
Haiku 4.5 $0.00006 $0.00552

Measured 1mo ago against content hash 8fc8eaa30289, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security-sentinel scanned grade A 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 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- pattern: subprocess.run($CMD, ..., shell=True, ...)
.claude/agents/security-sentinel.md · 535 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. 1mo ago Changed · +30 lines 8fc8eaa30289
  2. 2mo ago Changed · +52 lines 160d4dfc11ad
  3. 2mo ago First seen · 453 lines · 58 tokens per session scan A 8e1c01951b48

Subscribe to this mod's changes

security-sentinel is an agent published in the GitHub repository mantacron/manta (10 stars, last pushed 1mo ago), with no licence file. It adds 58 tokens to every session and 5,522 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude CodeSecurityai-codingai-security-governanceclaude-commandsclaude-skillsengineering-governance
Related

security-sentinel compared with agents from other repositories

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solana-architectsolanabr/solana-ai-kitAgent1041mo agoMITA41Claude Code
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