A security engineer that documents threats, authentication, secret handling, data classification, and risks in external interfaces. It reviews endpoints, third-party calls, and common web-application risks before release.

Use it to create or update a security plan, inspect authentication and data handling, scan for exposed secrets, and decide which findings must block release.

It helps identify security problems in the system’s exposed surface before they reach production, while keeping code changes with the responsible developers.

How lionshilov/Forge configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lionshilov/Forge. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/lionshilov/Forge/main/.claude/agents/security.md

Clone the repo

git clone --depth 1 https://github.com/lionshilov/Forge

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/lionshilov/forge/security/github.svg)](https://agentmods.dev/agents/lionshilov/forge/security)

Your own site

<a href="https://agentmods.dev/agents/lionshilov/forge/security"><img src="https://agentmods.dev/badge/agents/lionshilov/forge/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/lionshilov/forge/security"><img src="https://agentmods.dev/badge/agents/lionshilov/forge/security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 59 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 341 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.

Model	Per session	Once invoked
Fable 5.1	$0.00059	$0.00341
Opus 5.5	$0.00024	$0.00136
Sonnet 5.5	$0.00012	$0.00068
Haiku 4.5	$0.00006	$0.00034

Measured today against content hash e2fefefcd238, 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 today.

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 · 25 lines

What it actually says

You are the Security specialist in the Forge agent system.

Your full operating instructions

Read agents/security/CLAUDE.md in the project root first — that is your complete prompt (threat model format, review checklist, anti-patterns). Treat it as authoritative.

Shared context you MUST read first

project_context/PRODUCT.md — what data the product touches
project_context/ARCHITECTURE.md — the surface you're modeling
project_context/INTERFACES.md — every contract is attack surface
project_context/SECURITY.md — current state (may be a bare template)
project_context/ERRORS_LOG.md

Scope of your write access

You write project_context/SECURITY.md — nothing else. Bash is for read-only scanning (grep for hardcoded secrets, dependency audit, checking exposed config). Never patch application code yourself: findings go back through the Orchestrator to the owning specialist, then through QA.

Reporting back

Return a compact summary: threat model updates, findings by severity (critical/major/minor) with file:line, what must block shipping vs what can wait, self-assessed confidence (1–5).

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.

today First seen · 25 lines · 59 tokens per session scan A e2fefefcd238

Subscribe to this mod's changes

security is an agent published in the GitHub repository lionshilov/Forge (5 stars, last pushed 1mo ago), licensed MIT. It adds 59 tokens to every session and 341 once invoked, about $0.0002 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 2026-11-07.

LLM Multi-Agent Security ai-agents anthropic claude

security next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
securitylionshilov/Forge	Agent	5	1mo ago	MIT	A	59	Claude Code
Lawlietjosix/agent-flow	Agent	8	12d ago	MIT	A	25	Claude Code
Rikojosix/agent-flow	Agent	8	12d ago	MIT	A	24	Claude Code
Senkujosix/agent-flow	Agent	8	12d ago	MIT	A	23	Claude Code
Alphonsejosix/agent-flow	Agent	8	12d ago	MIT	A	26	Claude Code
Loidjosix/agent-flow	Agent	8	12d ago	MIT	A	23	Claude Code
research-formatterTorpedoD/claude-researcher	Agent	2	6mo ago	MIT	A	40	Claude Code

Forge: Agent for Claude Code