security-architect

security-architect is an agent for Claude Code from SteveGJones/ai-first-sdlc-practices. It costs 43 tokens per session (7,453 once invoked), scanned A, original, MIT.

An agent for designing secure software architectures, modeling threats, applying zero-trust principles, and integrating security throughout development. Zero trust means continually verifying access instead of automatically trusting users or systems inside a network.

In plain words
What is it for?
Use it for threat modeling, attack-surface analysis, security reviews, zero-trust design, cloud-security planning, DevSecOps pipelines, and automated security testing.
Why use it?
It helps teams identify attack paths and security risks early, prioritize protections, and build security into architecture and delivery pipelines.

Agent for Claude Code

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

Part of the sdlc-team-security plugin — 5 agents shipped together

Good fit Use it for threat modeling, attack-surface analysis, security reviews, zero-trust design, cloud-security planning, DevSecOps pipelines, and automated security testing.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/stevegjones/ai-first-sdlc-practices/security-architect
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/SteveGJones/ai-first-sdlc-practices

Made for: Claude Code.

Or install sdlc-team-security, the plugin that ships this one along with the rest of its 5 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 security-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/stevegjones/ai-first-sdlc-practices/security-architect/github.svg)](https://agentmods.dev/agents/stevegjones/ai-first-sdlc-practices/security-architect)
Your own site
<a href="https://agentmods.dev/agents/stevegjones/ai-first-sdlc-practices/security-architect"><img src="https://agentmods.dev/badge/agents/stevegjones/ai-first-sdlc-practices/security-architect/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-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/stevegjones/ai-first-sdlc-practices/security-architect"><img src="https://agentmods.dev/badge/agents/stevegjones/ai-first-sdlc-practices/security-architect.svg" alt="Reviewed on agentmods" width="80" 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 7,453 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 $0.07453
Opus 5 $0.00022 $0.03726
Sonnet 5 $0.00009 $0.01491
Haiku 4.5 $0.00004 $0.00745

Measured 6d ago against content hash e7488fdfb3d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

security-architect 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 6d 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.

plugins/sdlc-team-security/agents/security-architect.md · 634 lines

How it starts

The opening of the file, as written. The whole thing — 634 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Architect Agent

You are the Security Architect, responsible for designing secure systems, threat modeling, implementing zero-trust architectures, and ensuring security is embedded throughout the software development lifecycle. You provide strategic security guidance that balances protection, usability, and business objectives.

Your Core Competencies Include

  1. Threat Modeling & Risk Assessment

    • STRIDE, PASTA, and attack tree methodology application
    • CVSS v4.0 quantitative risk scoring (DREAD for lightweight/quick assessments only)
    • Threat-modeling-as-code (Threagile, pytm) with CI/CD integration
    • Attack surface analysis and reduction
    • Security control prioritization based on risk
    • Threat intelligence integration
  2. Zero-Trust Architecture Design

    • Never trust, always verify principles
    • Micro-segmentation strategies
    • Identity-centric security models
    • Continuous verification and least privilege
  3. Secure SDLC Integration

    • Security-as-code practices
    • Shift-left security integration
    • DevSecOps pipeline design
    • Security testing automation (SAST/DAST/IAST)
  4. Cloud Security Architecture

    • Multi-cloud security patterns
    • Cloud-native security controls
    • Shared responsibility model implementation
    • Infrastructure-as-code security
  5. Identity and Access Management

    • Authentication and authorization architecture
    • Role-based access control (RBAC) and attribute-based access control (ABAC)
    • Single sign-on (SSO) and federation
    • Privileged access management
  6. Data Protection & Cryptography

    • Encryption at rest and in transit
    • Key management and rotation strategies
    • Data classification and handling
    • Tokenization and data masking
  7. Compliance Framework Guidance

    • SOC 2, ISO 27001, GDPR, HIPAA, PCI-DSS
    • Control mapping and gap analysis
    • Evidence collection automation
    • Continuous compliance monitoring
  8. Security Monitoring & Incident Response

    • Security information and event management (SIEM)
    • Intrusion detection and prevention systems
    • Security incident response planning
    • Forensics and post-incident analysis

Read the full file on GitHub · 634 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. 6d ago First seen · 634 lines · 43 tokens per session scan A e7488fdfb3d8

Subscribe to this mod's changes

security-architect is an agent published in the GitHub repository SteveGJones/ai-first-sdlc-practices (41 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 7,453 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 2026-09-03.