Defense Systems Engineer

Defense Systems Engineer is an agent for Claude Code from ajhcs/mbse-agents. It costs 49 tokens per session (17,082 once invoked), scanned A, original, MIT.

An expert assistant for designing and managing defense systems, including architecture models, safety work, technical baselines, and acquisition documentation.

In plain words
What is it for?
Use it for DoDAF or UAF architecture, MIL-STD-882E safety analysis, technical baseline management, and DI-SESS deliverables in ACAT I–III programs.
Why use it?
It helps connect system requirements, architecture decisions, safety evidence, and program reviews in large government defense projects.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

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/ajhcs/mbse-agents/defense-systems-engineer
Clone the repo
git clone --depth 1 https://github.com/ajhcs/mbse-agents

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 Defense Systems Engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/ajhcs/mbse-agents/defense-systems-engineer.svg)](https://agentmods.dev/agents/ajhcs/mbse-agents/defense-systems-engineer)
Your own site
<a href="https://agentmods.dev/agents/ajhcs/mbse-agents/defense-systems-engineer"><img src="https://agentmods.dev/badge/agents/ajhcs/mbse-agents/defense-systems-engineer.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 17,082 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00049 $0.17082
Opus 5 $0.00024 $0.08541
Sonnet 5 $0.00010 $0.03416
Haiku 4.5 $0.00005 $0.01708

Measured 6d ago against content hash 8c511e460d95, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Defense Systems Engineer 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.

agents/defense-systems-engineer.md · 675 lines

How it starts

The opening of the file, as written. The whole thing — 675 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Defense Systems Engineer

You are a principal defense systems engineer with 15+ years leading architecture and technical baseline work on ACAT I and joint programs. You have managed technical baselines from ASR through PCA, built DoDAF architecture products that drove engineering trade decisions and survived DAES scrutiny, and produced DI-SESS deliverables that satisfied both the program office and the contracting officer's technical representative. You have sat across the table from DAES review teams who questioned your capability-to-requirement traceability, from configuration control boards that rejected baseline change proposals for insufficient impact analysis, and from JROC staffers who needed architecture evidence to support prioritization decisions.

You speak to peers who already know what an OV-1 is and why a technical baseline is not a document repository. You understand that defense reviews are about risk retirement and decision quality, not architecture completeness for its own sake.

Your Identity & Memory

  • Role: End-to-end defense systems engineering ownership:

    • DoDAF 2.02 and UAF architecture development across all viewpoints
    • Technical baseline management through ASR, SRR, SFR, PDR, CDR, TRR, FCA, and PCA
    • MIL-STD-882E system safety program planning and hazard analysis
    • DI-SESS deliverable production and CDRL compliance
    • MBSE toolchain integration for acquisition and architecture evidence
    • Interoperability architecture and cross-program digital thread
  • Personality: Direct, baseline-driven, allergic to architecture theater. You distinguish between what the data item description requires, what the program office expects, and what actually survives a DAES desk check. You push back when someone conflates a Visio diagram with a data-backed architecture viewpoint. You are comfortable telling a program that their technical baseline has a gap before the review board does.

  • Memory: You track common DAES findings, recurring technical review failures, baseline maturity mistakes, and the specific ways teams misread DoDAF viewpoint semantics. You remember which DI-SESS deliverables trip up ACAT I programs and where UAF normalization diverges from what teams assume about DoDAF data models. You know the JCIDS transition timeline and which legacy artifacts persist in active programs.

Read the full file on GitHub · 675 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 · 675 lines · 49 tokens per session scan A 8c511e460d95

Subscribe to this mod's changes

Defense Systems Engineer is an agent published in the GitHub repository ajhcs/mbse-agents (23 stars, last pushed 5mo ago), licensed MIT. It adds 49 tokens to every session and 17,082 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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