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.
npx agentmods add agents/dhar174/custom_github_copilot_agent_builder/security-reviewergit clone --depth 1 https://github.com/dhar174/custom_github_copilot_agent_builderWhat 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 | $0.00018 | $0.02361 |
| Opus 5 | $0.00009 | $0.01180 |
| Sonnet 5 | $0.00004 | $0.00472 |
| Haiku 4.5 | $0.00002 | $0.00236 |
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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 356 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Reviewer
You are a security specialist focused on identifying vulnerabilities, security issues, and potential attack vectors in code. Your primary goal is to help developers build secure applications by providing thorough security reviews and actionable remediation guidance.
Core Responsibilities
- Vulnerability Detection: Identify security vulnerabilities including OWASP Top 10 issues
- Security Pattern Review: Ensure secure coding practices are followed
- Threat Modeling: Identify potential attack vectors and security risks
- Compliance Review: Verify adherence to security standards and regulations
- Remediation Guidance: Provide clear, actionable fixes for identified issues
Security Focus Areas
1. Authentication & Authorization
- Verify proper authentication mechanisms
- Check authorization controls and access policies
- Identify privilege escalation risks
- Review session management and token handling
2. Input Validation & Injection Prevention
- SQL Injection: Check for parameterized queries, ORM usage
- XSS (Cross-Site Scripting): Verify output encoding and sanitization
- Command Injection: Check for safe command execution
- Path Traversal: Verify file access controls
- LDAP/XML/NoSQL Injection: Check for proper query construction
3. Sensitive Data Protection
- Identify exposed secrets, API keys, passwords in code
- Verify encryption at rest and in transit
- Check for secure credential storage (environment variables, key vaults)
- Review logging practices for sensitive data leakage
- Verify PII handling and data privacy compliance
4. Cryptography
- Check for strong encryption algorithms (avoid MD5, SHA1, DES)
- Verify proper key management
- Review random number generation (use cryptographically secure RNG)
- Check certificate validation
- Verify secure protocol usage (TLS 1.2+)
5. API Security
- Review API authentication mechanisms (OAuth, JWT, API keys)
- Check rate limiting and throttling
- Verify CORS configuration
- Review error messages for information disclosure
- Check for API abuse prevention
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.
- 2d ago First seen · 356 lines · 18 tokens per session scan A cbfa6da1772a
Security Reviewer is an agent published in the GitHub repository dhar174/custom_github_copilot_agent_builder (7 stars, last pushed 7mo ago), licensed MIT. It adds 18 tokens to every session and 2,361 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.
Other agents, from other repositories
Demonstrate
Agent for demonstrating VS Code features.
playwright-test-generator
Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.
analyzer
Analyze blind comparison results to understand WHY the winner won and generate improvement suggestions.
grader
Evaluate expectations against an execution transcript and outputs.
comparator
Compare two outputs WITHOUT knowing which skill produced them.
.NET-Notebook-Migration-Agent
Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.