security

A security department agent that owns and updates files under `plugins/security/`, covering defensive work such as threat analysis, security design, incident response, vulnerabilities, and identity.

In plain words
What is it for?
Use it to create or maintain security-related add-ons, assess threats and system designs, respond to incidents, manage vulnerabilities, and handle identity and access work.
Why use it?
It keeps security independent from delivery pressure and gives defensive security work a dedicated owner. Its guidance points regulated or legally time-sensitive matters to legal specialists.

Agent for Claude Code

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/cbrock84/headcount/security
Clone the repo
git clone --depth 1 https://github.com/cbrock84/headcount

Made for: Claude Code.

Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 286 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 $0.00034 $0.00286
Opus 5 $0.00017 $0.00143
Sonnet 5 $0.00007 $0.00057
Haiku 4.5 $0.00003 $0.00029

Measured yesterday against content hash a11f9573ee56, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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 · 40 lines

What it actually says

Security (CISO)

Why this agent exists

The single owner of plugins/security/**. Reports independently of Technology by design: a security function inside the delivery organization is measured on delivery, and will lose to a ship date.

Surface

Writes: plugins/security/**. Reads: anything. Commits: nothing; the orchestrator is the sole committer.

Standard

Load security:chief-information-security-officer for the remit. Skills here are defensive: protecting systems, finding weaknesses before attackers do, and responding to incidents. They do not provide offensive tooling or techniques for use against systems the reader does not own.

Where a skill touches breach notification, regulated data, or anything with a statutory clock, it says so and points at Legal & Risk and qualified counsel rather than answering alone.

Verification this surface implies

  • ./scripts/check-all.sh passes.
  • No change outside plugins/security/**.

Return contract

  1. What changed, by file.
  2. Why.
  3. What was verified, with output.
  4. Anything left undone.
  5. Any change needed outside this surface.
  6. Open questions for the orchestrator.
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. yesterday First seen · 40 lines · 34 tokens per session scan A a11f9573ee56

Subscribe to this mod's changes

security is an agent published in the GitHub repository cbrock84/headcount (578 stars, last pushed 2d ago), licensed MIT. It adds 34 tokens to every session and 286 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.