security-reviewer

A read-only code-review agent for security-sensitive changes, such as login access, encryption, secrets, deployment files, network rules, or continuous-integration workflows. It checks the changes against the project's security-controls.md file and reports findings.

In plain words
What is it for?
Use it to review a diff before merging changes to authentication, authorization, cryptography, secrets, deployment manifests, network policies, or CI workflows.
Why use it?
It helps identify security issues in changes that can affect who gets access, how data is protected, or how software is deployed.

Agent

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.

agentmods
npx agentmods add agents/arbiterforge/codearbiter/security-reviewer
Clone the repo
git clone --depth 1 https://github.com/arbiterForge/codeArbiter
Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 700 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00054 $0.00700
Opus 5 $0.00027 $0.00350
Sonnet 5 $0.00011 $0.00140
Haiku 4.5 $0.00005 $0.00070

Measured yesterday against content hash 6a6a8ad12953, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security-reviewer 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 yesterday.

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.

- No `child_process.exec()` / `spawn()` with `shell: true`.
core/surface/agents/security-reviewer.md · 73 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. yesterday First seen · 73 lines · 54 tokens per session scan A 6a6a8ad12953

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository arbiterForge/codeArbiter (141 stars, last pushed yesterday), licensed AGPL-3.0. It adds 54 tokens to every session and 700 once invoked, about $0.0003 per session on Opus 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 2026-08-30.