mb-reviewer-security

mb-reviewer-security is an agent for Claude Code from fockus/skill-memory-bank. It costs 43 tokens per session (462 once invoked), scanned A, original, MIT.

A security reviewer for Memory Bank review groups. It checks code and changes for secrets, unsafe access, input handling, authentication, authorization, and risky filesystem, network, subprocess, or data-processing behavior.

In plain words
What is it for?
Use it to review a change for security risks and return a strict JSON verdict with issue severity, location, explanation, and suggested fix.
Why use it?
It focuses a review on security and operational harm that ordinary code review may miss. It also checks whether previous fixes weakened protections or exposed sensitive information.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review a change for security risks and return a…

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/fockus/skill-memory-bank/mb-reviewer-security
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/fockus/skill-memory-bank

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 mb-reviewer-security

README.md
[![agentmods](https://agentmods.dev/badge/agents/fockus/skill-memory-bank/mb-reviewer-security.svg)](https://agentmods.dev/agents/fockus/skill-memory-bank/mb-reviewer-security)
Your own site
<a href="https://agentmods.dev/agents/fockus/skill-memory-bank/mb-reviewer-security"><img src="https://agentmods.dev/badge/agents/fockus/skill-memory-bank/mb-reviewer-security.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 462 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00043 $0.00462
Opus 5 $0.00022 $0.00231
Sonnet 5 $0.00009 $0.00092
Haiku 4.5 $0.00004 $0.00046

Measured 7d ago against content hash b9bb1a2055d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

mb-reviewer-security scanned grade A with 0 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 7d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/mb-reviewer-security.md · 53 lines

What it actually says

MB Reviewer Security

You are one reviewer in a Memory Bank review ensemble. Review only security, safety, and operational risk.

Review focus

  • No secrets, tokens, keys, private data, or auth material in code/logs/docs.
  • Protected paths are not edited without explicit approval.
  • Input validation at boundaries; no raw SQL/command/path injection.
  • Authn/authz checks before sensitive work.
  • Network, filesystem, subprocess, and deserialization behavior is bounded and safe.
  • Error handling does not leak secrets or hide dangerous failures.
  • Previous fixes did not widen permissions or bypass safeguards.

Severity

  • blocker: exploit/data loss/secret exposure/protected-path violation.
  • major: missing boundary validation or unsafe operational behavior.
  • minor: low-risk hardening or observability improvement that can become backlog.

Output

Strict JSON only:

{
  "reviewer": "mb-reviewer-security",
  "focus": "security",
  "verdict": "APPROVED" | "CHANGES_REQUESTED",
  "counts": {"blocker": 0, "major": 0, "minor": 0},
  "issues": [
    {"severity":"major", "category":"security", "file":"path", "line":0, "message":"concrete issue", "fix":"concrete fix"}
  ]
}

Report delivery (background runs)

If you were spawned as a background teammate, your final turn text is NOT automatically delivered to the team lead — only an idle notification is. Before ending your final turn, send your complete report via SendMessage to the session/agent that dispatched you. If SendMessage is unavailable at runtime, write the report to <bank>/.reports/<your-name>-<item>.md so the orchestrator can pick it up from disk.

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. 7d ago First seen · 53 lines · 43 tokens per session scan A b9bb1a2055d2

Subscribe to this mod's changes

mb-reviewer-security is an agent published in the GitHub repository fockus/skill-memory-bank (24 stars, last pushed yesterday), licensed MIT. It adds 43 tokens to every session and 462 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other agents, from other repositories

style-analyzer

Use this agent after UI implementation or when the user requests design consistency audits. Ensures visual consistency, catches design drift from locked tokens, identifies technical debt in UI code, and guards the integrity of the design language. Context: Multiple UI components were built during the cycle. user…

drobins25/craft · 203 tokens

maze-architect

Route planner for perpendicular PR review. Reads a raw diff with ZERO intent context (no story files, no commit messages, no PR descriptions) and generates 2-4 questions that the code demands answers to. These questions become coordinates for parallel maze-runner review agents. The architect throws the frisbee blind …

drobins25/craft · 157 tokens

verifier

Verification agent for /craft:research-verify. Takes a single claim from existing research and attempts to disprove it using independent primary sources. Returns a verdict (CONFIRMED/REFUTED/PARTIALLYTRUE/UNVERIFIABLE) with evidence. NOT a researcher. Does not discover new topics or cast a wide net. Takes one claim…

drobins25/craft · 178 tokens

bulwark-standards-reviewer

Critical analysis of Claude Code assets against official standards. Produces severity-rated findings with remediation suggestions. Use proactively when validating any new or modified Claude Code asset (skill, agent, hook, command, MCP, plugin) against current Anthropic standards.

QBall-Inc/the-bulwark · 58 tokens

adr-reviewer

Strict Architecture Decision Record reviewer. Reviews ADRs for section completeness, context-decision alignment, straw-man alternatives, one-sided consequences, unsourced numeric claims, and unstated override relationships with prior ADRs. Use PROACTIVELY after writing or substantially revising an ADR, before commit.…

shimo4228/claude-harness · 91 tokens

swift-reviewer

Expert Swift / SwiftUI code reviewer specializing in Swift 6 strict concurrency, value semantics, SwiftUI state management, memory management (retain cycles), and HIG compliance. Use for all Swift code changes in iOS / macOS projects.

shimo4228/claude-harness · 52 tokens