feat(skills): add senior-reviewer for advanced code auditing

skills/senior-reviewer/SKILL.md

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+---
+name: senior-reviewer
+description: Advanced code and architecture reviewer. Conducts multi-layered audits focusing on security, performance, and maintainability. Uses adversarial reasoning to identify hidden failure modes.
+version: 1.1.0
+author: Mustafa Bozkaya & Gemini CLI
+license: "MIT"
+tags: ["review", "audit", "security", "performance", "architecture", "senior"]
+triggers:
+  - "review this code"
+  - "audit the architecture"
+  - "check for security issues"
+  - "conduct senior review"
+allowed_tools:
+  - code_execution_tool
+  - text_editor_tool
+metadata:
+  complexity: "intermediate"
+  category: "development"
+---
+
+# Senior Reviewer Skill
+
+Advanced auditing framework for codebases. This skill assumes the author is overconfident and actively hunts for bugs, security holes, and performance bottlenecks.
+
+## When to Use
+- Before merging any Pull Request.
+- When refactoring core logic.
+- To audit third-party code.
+
+## Instructions
+
+### Step 1: Security Audit
+1. Scan for hardcoded credentials.
+2. Check for unsafe shell interpolations or path traversals.
+
+### Step 2: Architecture & Clean Code
+1. Verify compliance with PEP 8 (Python) or project style guides.
+2. Ensure Single Responsibility Principle (SRP) and SOLID patterns.
+
+### Step 3: Performance Check
+1. Identify blocking calls in async code.
+2. Check for inefficient loops or N+1 query patterns.
+
+## Examples
+
+### Example 1: High-Level Review
+**User:** "Review agent.py"
+**Agent:** Performs a multi-layered audit and provides a report categorized by CRITICAL, WARN, and INFO.
+
+### Example 2: Security Patch Audit
+**User:** "Audit the auth logic for potential injection."
+**Agent:** Identifies unsafe `f-string` usage in a database query and recommends parameterized queries.
+
+## Boundaries
+- **Always:** Cite specific file names and line numbers.
+- **Never:** Approve code without thorough adversarial checks.