security-first-methodology

Implement threat modeling and pre-execution gate checks for autonomous agent workflows.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/Nellur35/security-first-ai-dev-methodology --skill security-first-methodology
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: security-first-methodology
Source: https://github.com/Nellur35/security-first-ai-dev-methodology/tree/main/integrations/antigravity/.agents/skills/security-first-methodology
Command: npx skills add https://github.com/Nellur35/security-first-ai-dev-methodology --skill security-first-methodology

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill addresses the need for a security-first approach in autonomous agent workflows, ensuring that security is integrated into all stages of development.

Core Features & Use Cases

  • Threat Modeling: Adds threat modeling to plans, security gates before execution, and adversarial review for security-critical decisions.
  • Recipe-aware Constraints: Applies constraints based on the task type, such as threat modeling for new projects and pre-execution gate checks.
  • Security Patterns: Provides guidelines for code generation, such as avoiding hardcoded secrets and validating inputs at trust boundaries.
  • Second-opinion Review: Offers an optional review process for high-risk tasks, including cross-review with Claude Code or Codex, manual fresh-chat review, and local adversarial review.

Quick Start

Use the security-first-methodology skill to activate the adaptive security-first methodology for your autonomous agent workflow.

Frequently Asked Questions about security-first-methodology

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I integrate threat modeling into autonomous agent workflows?

Threat modeling integrates into autonomous agent workflows by applying adaptive security-first methodology, adding threat models to plans, enforcing pre-execution gate checks, and conducting post-execution validation for security-critical decisions.

What are security gates and how do they work in code generation?

Security gates in code generation are pre-execution checks that enforce security patterns, such as avoiding hardcoded secrets and validating inputs at trust boundaries, ensuring autonomous agents adhere to security-first constraints before task execution.

How do I apply security-first methodology to different task types like bug fixes or new projects?

Security-first methodology applies recipe-aware constraints based on task type, triggering threat modeling for new projects, pre-execution gate checks for features, and adversarial review for bug fixes or security audits.

Can I use a second-opinion review process for high-risk autonomous agent tasks?

Yes, high-risk autonomous agent tasks support an optional second-opinion review process, including cross-review with Claude Code or Codex, manual fresh-chat review, and local adversarial review to validate security-critical decisions.

Does this security-first methodology require any dependencies for autonomous agents?

No dependencies are required to apply this security-first methodology to autonomous agents, as it operates as an adaptive framework providing scripts and references for threat modeling, security gates, and post-execution validation.

When should I not use a security-first approach for autonomous agents?

A security-first approach for autonomous agents adds overhead through mandatory threat modeling and gate checks, making it less suitable for low-risk, rapid prototyping tasks where post-execution validation and adversarial review are unnecessary.