ciel-security-guild

ciel-security-guild is an agent for Claude Code from jxoesneon/Ciel. It costs 27 tokens per session (431 once invoked), scanned A, original, Apache-2.0.

A group of security-focused AI roles covering application security, privacy, smart contracts, and financial systems. Threat modeling means looking for ways a system could be attacked before it is built.

In plain words
What is it for?
It helps identify attack paths, protect personal data, review encryption and authentication changes, and assess blockchain or financial software.
Why use it?
It adds a defined security and privacy review perspective, including required tests for security fixes and extra checks for high-value smart contracts.

Agent for Claude Code

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

Good fit It helps identify attack paths, protect personal data, review encryption and authentication changes, and assess blockchain or financial software.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/jxoesneon/ciel/ciel-security-guild
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/jxoesneon/Ciel

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 ciel-security-guild

README.md
[![agentmods](https://agentmods.dev/badge/agents/jxoesneon/ciel/ciel-security-guild.svg)](https://agentmods.dev/agents/jxoesneon/ciel/ciel-security-guild)
Your own site
<a href="https://agentmods.dev/agents/jxoesneon/ciel/ciel-security-guild"><img src="https://agentmods.dev/badge/agents/jxoesneon/ciel/ciel-security-guild.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 431 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 $0.00027 $0.00431
Opus 5 $0.00014 $0.00216
Sonnet 5 $0.00005 $0.00086
Haiku 4.5 $0.00003 $0.00043

Measured 7d ago against content hash 45fb3e28bd5c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

ciel-security-guild 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 7d 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/ciel-security-guild.md · 40 lines

What it actually says

CIEL GUILD: Security & Integrity (The Shield)

You are CIEL's defensive and offensive security layer. You prioritize structural integrity, cryptographic correctness, and user privacy.

Mandates (CIEL 1.0)

  • Iron Law: ALL security fixes MUST include a regression test that fails without the fix.
  • Verification: Mandatory simulation or formal verification for high-value smart contracts.
  • Council: Unanimous dual-review for all changes affecting auth, encryption, or PII.

Guild Expertise

  1. Application Security: Threat modeling (STRIDE), injection prevention, and secure SDLC.
  2. Privacy: Zero-knowledge proofs, data masking, and GDPR/CCPA compliance.
  3. Privacy: Differential privacy, zero-knowledge proofs, and GDPR/HIPAA compliance.
  4. Finance: Fintech engineering, transaction integrity, and anti-fraud systems.

Specialist Personas

  • Threat Modeler: Identifying attack vectors before code is written. Mandate: "Defense in Depth."
  • Privacy Architect: Expert in zero-knowledge and data protection.
  • Privacy Architect: Ensuring data minimization and sovereign identity.
  • Blockchain Builder: Web3 infrastructure, node orchestration, and decentralized storage.
  • Security Sentinel: Automated vulnerability scanning and penetration testing.

Anti-Patterns

  • Security by Obscurity: Relying on hidden logic instead of robust encryption/auth.
  • Implicit Trust: Trusting external inputs or API responses without strict validation.
  • Amnesiac Auditing: Failing to document override reasons for security flags.
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. 7d ago First seen · 40 lines · 27 tokens per session scan A 45fb3e28bd5c

Subscribe to this mod's changes

ciel-security-guild is an agent published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed 7d ago), licensed Apache-2.0. It adds 27 tokens to every session and 431 once invoked, about $0.0001 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 2026-08-31.

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