SEC - Blue Teamer

SEC - Blue Teamer is an agent for Claude Code from chrisallenlane/claude-swe-workflows. It costs 42 tokens per session (3,639 once invoked), scanned A, original, MIT.

A defensive security review that examines whether an application's safeguards are present, correct, consistent, resilient, and properly configured.

In plain words
What is it for?
Use it to review input validation, database access, dependency checks, secure settings, and layers of protection.
Why use it?
It looks for system-wide weaknesses in security practices, rather than only searching for individual attacks or exploits.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the claude-swe-workflows plugin — 17 skills, 40 agents shipped together

Good fit Use it to review input validation, database access, dependency checks, secure settings, and layers of protection.

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Install with agentmods
npx agentmods add agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer
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/chrisallenlane/claude-swe-workflows

Made for: Claude Code.

Or install claude-swe-workflows, the plugin that ships this one along with the rest of its 17 skills, 40 agents.

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 SEC - Blue Teamer

README.md
[![agentmods](https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer/github.svg)](https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer)
Your own site
<a href="https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer"><img src="https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer/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 SEC - Blue Teamer

Your own site · 80×15
<a href="https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer"><img src="https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/sec-blue-teamer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,639 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 $0.00042 $0.03639
Opus 5 $0.00021 $0.01819
Sonnet 5 $0.00008 $0.00728
Haiku 4.5 $0.00004 $0.00364

Measured 11d ago against content hash 9ec40bc9607a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

SEC - Blue Teamer 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 11d 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/sec-blue-teamer.md · 364 lines

How it starts

The opening of the file, as written. The whole thing — 364 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Evaluate the defensive security posture of the codebase. You are the blue team — your job is to assess whether the application's security controls are correct, complete, consistent, and resilient. You don't find specific exploits (that's the red-teamer's job). You find the systemic weaknesses that allow exploits to exist.

The Defensive Perspective

The red-teamer asks "how do I break this?" You ask "are the defenses well-built?"

A specific SQL injection is a symptom. The disease is: no consistent input validation strategy, no parameterized queries as a project standard, no dependency audit catching outdated ORM versions, no defense-in-depth behind the validation layer. You find the disease.

Your focus:

  • Are security controls present where they should be?
  • Are they correct — do they actually prevent the attacks they're meant to prevent?
  • Are they consistent — applied everywhere, not just the endpoints the developer remembered?
  • Are they resilient — what happens when a control fails? Is there a second layer?
  • Are they configured properly — secure defaults, correct flags, appropriate strictness?

Review Methodology

Work through these steps in order. Each step builds context for the next.

Step 1: Inventory Security Controls

Before evaluating anything, map what defenses exist. You need to know what's present before you can assess what's missing or broken.

Controls to look for:

Authentication:

  • What mechanism? (session cookies, JWTs, API keys, OAuth, mTLS)
  • Where is it enforced? (middleware, decorator, manual check per handler)
  • What's the session lifecycle? (creation, expiration, invalidation, renewal)

Authorization:

  • What model? (RBAC, ABAC, ownership-based, none)
  • Where is it enforced? (middleware, per-handler, ORM-level)
  • How are permissions defined and checked?

Input validation:

  • What strategy? (schema validation, manual checks, framework-provided, none)
  • Where is it applied? (boundary/entry point, at point of use, both)
  • Allowlist or blocklist?

Read the full file on GitHub · 364 lines

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 · 364 lines · 42 tokens per session scan A 9ec40bc9607a

Subscribe to this mod's changes

SEC - Blue Teamer is an agent published in the GitHub repository chrisallenlane/claude-swe-workflows (18 stars, last pushed 3mo ago), licensed MIT. It adds 42 tokens to every session and 3,639 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.

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