talos-mcp-server: Agent for Claude Code

.claude/agents/security-reviewer.md

security-reviewer is an agent for Claude Code from Nosmoht/talos-mcp-server. It costs 45 tokens per session (1,467 once invoked), scanned A, original, MIT.

A read-only security reviewer for changes involving authentication, tokens, input validation, enforcement hooks, or file-path permissions. It checks trust boundaries and credential handling.

In plain words
What is it for?
Use it to review HTTP authentication, environment-based token handling, unauthorized responses, input sanitization, hook enforcement, and path allowlists.
Why use it?
It helps catch flaws such as unsafe token comparisons, leaked credentials, missing authentication failures, or bypassable restrictions.

Agent for Claude Code

Written for Claude Code: PreToolUse hook event. Also seen: model in frontmatter.

This is Nosmoht/talos-mcp-server's own configuration. It tells Claude Code how to work on talos-mcp-server itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything talos-mcp-server configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Nosmoht/talos-mcp-server. 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/Nosmoht/talos-mcp-server/main/.claude/agents/security-reviewer.md
Clone the repo
git clone --depth 1 https://github.com/Nosmoht/talos-mcp-server

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-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/nosmoht/talos-mcp-server/security-reviewer/github.svg)](https://agentmods.dev/agents/nosmoht/talos-mcp-server/security-reviewer)
Your own site
<a href="https://agentmods.dev/agents/nosmoht/talos-mcp-server/security-reviewer"><img src="https://agentmods.dev/badge/agents/nosmoht/talos-mcp-server/security-reviewer/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-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/nosmoht/talos-mcp-server/security-reviewer"><img src="https://agentmods.dev/badge/agents/nosmoht/talos-mcp-server/security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,467 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 $0.00045 $0.01467
Opus 5 $0.00023 $0.00733
Sonnet 5 $0.00009 $0.00293
Haiku 4.5 $0.00005 $0.00147

Measured 9d ago against content hash 3ea76fbad0dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

security-reviewer 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 9d 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-reviewer.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a security escalation reviewer. You are invoked when staff-reviewer or principal-architect-reviewer sets status: escalate with security in the escalations list.

You evaluate security posture only — auth flows, input validation, trust boundaries, enforcement mechanisms. You do NOT re-review code quality, architecture, or compatibility.

Evaluation Checklist

Authentication and Credential Handling

For HTTP mode (TALOS_MCP_HTTP_ADDR):

  • Timing-safe comparison: Bearer token compared with crypto/subtle.ConstantTimeCompare — not == or bytes.Equal
  • Token from environment only: TALOS_MCP_AUTH_TOKEN read at startup, never embedded in source
  • Token not logged: Bearer token value never appears in audit log, error messages, or startup output
  • Missing token = server refuses to start: If TALOS_MCP_HTTP_ADDR set but TALOS_MCP_AUTH_TOKEN empty, server exits with clear error
  • 401 without detail: Unauthorized response does not reveal whether the token is wrong vs absent

Read the full file on GitHub · 124 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. 9d ago First seen · 124 lines · 45 tokens per session scan A 3ea76fbad0dd

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository Nosmoht/talos-mcp-server (3 stars, last pushed 15d ago), licensed MIT. It adds 45 tokens to every session and 1,467 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 2026-08-31.