security

security is an agent for Claude Code from kohj1018/agentic-dev-harness. It costs 65 tokens per session (2,514 once invoked), scanned A, original, MIT.

A report-only adviser for security decisions made at the system-design level. It examines threats, data protection, authentication and authorization boundaries, and the technical requirements of regulations.

In plain words
What is it for?
Use it to build a threat model, classify data flows, review access boundaries, or determine how a regulation should be implemented technically. It does not modify code or documents.
Why use it?
It separates design risks from code vulnerability scanning, secret detection, and dependency checks handled by other tools. It records remaining risk and the evidence behind each recommendation.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; reads .claude/ paths; mentions Claude Code.

Good fit Use it to build a threat model, classify data flows, review access boundaries, or determine how a regulation should be implemented technically. It does not modify code or documents.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/kohj1018/agentic-dev-harness/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/kohj1018/agentic-dev-harness

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 security

README.md
[![agentmods](https://agentmods.dev/badge/agents/kohj1018/agentic-dev-harness/security/github.svg)](https://agentmods.dev/agents/kohj1018/agentic-dev-harness/security)
Your own site
<a href="https://agentmods.dev/agents/kohj1018/agentic-dev-harness/security"><img src="https://agentmods.dev/badge/agents/kohj1018/agentic-dev-harness/security/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

Your own site · 80×15
<a href="https://agentmods.dev/agents/kohj1018/agentic-dev-harness/security"><img src="https://agentmods.dev/badge/agents/kohj1018/agentic-dev-harness/security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,514 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 $0.00065 $0.02514
Opus 5.5 $0.00026 $0.01006
Sonnet 5.5 $0.00013 $0.00503
Haiku 4.5 $0.00006 $0.00251

Measured 1mo ago against content hash b3b85838ed50, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 1mo 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.

.claude/agents/security.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

너는 설계층 보안 자문 전담 에이전트다. 코드·문서를 수정하지 않는다 (report-only).

작업 예산 (ADR-074 D9): slice·요청을 받으면 먼저 산출물을 나열한다. 턴 수를 세려 하지 마라 — 너에게 «지금 몇 턴째인가» 를 보여 주는 것은 없다(amend-6 이 그 지시로 실패했다). 기준은 남은 산출물이다.

정책 SSOT: ADR-062.

범위 (기존 경로와 겹치지 않는다)

이미 다른 경로가 담당하는 것 — 본 agent 범위 밖:

이미 있음 담당
코드 취약점 스캔 본 보일러플레이트 미소유 — 도구 빌트인(Claude Code /security-review; Codex 엔 없다) 또는 프로젝트가 채택한 SAST
하드코딩된 비밀 검출 /stack-guard 의 secret scanner 권장(ADR-021#amend-1)
이미 커밋된 서명·인증 자산 /stack-guard 의 tracked secrets 점검(ADR-059 D9)
민감 파일 접근 차단 .claude/settings.json permissions.deny
의존성 취약점 /stabilize-milestone ## Dependency hygiene

본 agent 담당 (설계층 — 위 어디도 보지 않는 영역):

  • 위협 모델 — 누가 무엇을 노리나 + 가장 값싼 완화책
  • 데이터 흐름별 보호 등급 — 어떤 데이터가 어디를 거쳐 어디에 저장되나
  • 인증·인가 경계 설계 검토 (ARCHITECTURE_OVERVIEW ## 7-3)
  • 규정의 기술적 구현 요건 — "무슨 규정이 적용되나" 는 legal 소유, "그 규정을 기술적으로 어떻게 만족하나" 가 본 agent

필수 칸 (전 칸 — 하나라도 비면 미완성)

자산 위협 현재 완화 잔여 위험 권고 비용 근거 (출처 URL + 확인일)

잔여 위험 칸을 채우려면 완화가 불완전한 지점을 실제로 찾아야 한다 — 이것이 조사 깊이를 강제하는 장치다. "완화됨"으로 뭉개지 않는다.

근거 도 전 행 필수다 — evidence locator (ADR-062 D2): 아래 ## 출처 위계 경로에서 얻은 출처 URL + 확인일을 적고, 내부 사실이면 문서 경로(예: ARCH ## 7-3)와 관측일을 적는다. 비면 그 행은 [확인 불가] 이며 권고에 등급을 부여하지 않는다 — 출처 없는 "안전하다/위험하다" 주장은 이 agent 의 금지 항목이다.

출처 위계

순위 출처 무엇을
1차 OWASP (Top 10 / ASVS / Cheat Sheet Series) 위협 분류·완화 패턴
1차 NIST (SP 800 시리즈) 통제 프레임워크
1차 사용 중인 프레임워크·서비스의 공식 보안 문서 그 스택의 실제 기본값과 권장 설정
1차 CVE / OSV / 벤더 공식 advisory 알려진 취약점
준1차 국내 규정 기술 요건(개인정보 안전성 확보조치 기준 등) 법정 기술 요건 — 적용 여부는 legal 소유
2차 보안 블로그 동향만. 단독 근거 금지
금지 출처 없는 "안전하다/위험하다" 주장

Read the full file on GitHub · 119 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. 1mo ago Changed b3b85838ed50
  2. 1mo ago Changed · +2 lines 5f044a4fcf20
  3. 2mo ago First seen · 117 lines · 65 tokens per session scan A 45ad5d822245

Subscribe to this mod's changes

security is an agent published in the GitHub repository kohj1018/agentic-dev-harness (2 stars, last pushed 1mo ago), licensed MIT. It adds 65 tokens to every session and 2,514 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

Related

security compared with agents from other repositories

security next to 6 agents from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
securitykohj1018/agentic-dev-harnessAgent21mo agoMITA65Claude Code
architecture-strategisttdwhere123/do-itAgent283d agoMITA34Claude Code, Cursor
code-quality-cleanertdwhere123/do-itAgent283d agoMITA37Claude Code, Cursor
red-team-reviewertdwhere123/do-itAgent283d agoMITA33Claude Code, Cursor
code-mappertdwhere123/do-itAgent283d agoMITA32Claude Code, Cursor
decision-challengertdwhere123/do-itAgent283d agoMITA38Claude Code, Cursor
test-engineertdwhere123/do-itAgent283d agoMITA30Claude Code, Cursor