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name: codebase-analysis description: Deep architectural analysis using Gemini's codebase_investigator tool. Trigger when user needs architecture overview ("analyze this codebase", "map dependencies"), onboarding to unfamiliar code, understanding legacy systems, or identifying technical debt.

Codebase Analysis via Gemini

Use Gemini's codebase_investigator tool for deep architectural analysis.

Quick Start

gemini "Use codebase_investigator to analyze this project. Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text 2>&1

When to Use

• Onboarding to unfamiliar codebases
• Understanding legacy systems
• Mapping component relationships
• Finding hidden dependencies
• Architecture documentation
• Technical debt assessment

Examples

Full project analysis:

gemini "Use codebase_investigator to analyze this project. Report on:
- Overall architecture
- Key dependencies
- Component relationships
- Potential issues
Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text

Flow mapping:

gemini "Use codebase_investigator to map the authentication flow. Identify all components involved. Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text

Dependency analysis:

gemini "Use codebase_investigator to analyze dependencies:
- Direct vs transitive
- Outdated packages
- Circular dependencies
- Bundle size impact
Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text

Technical debt:

gemini "Use codebase_investigator to identify technical debt:
- Deprecated patterns
- Inconsistent conventions
- Missing documentation
- Complex dependency chains
Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text

Iterative Analysis

Use sessions for multi-turn investigation:

# Initial analysis
gemini "Use codebase_investigator to analyze this project. Do not make any changes. Respond with analysis only." --allowed-tools codebase_investigator -o text

# Follow-up (continues session)
echo "What patterns did you find in the auth module? Do not make any changes. Respond with analysis only." | gemini --allowed-tools codebase_investigator -r 1 -o text

# Deeper dive
echo "Are there security concerns with that pattern? Do not make any changes. Respond with analysis only." | gemini --allowed-tools codebase_investigator -r 1 -o text

Notes

• Gemini must not make any changes, provide feedback ONLY.
• Gemini respects .gitignore - it cannot read files matching gitignore patterns
• Can take 5-10 minutes for large codebases
• Requires sandbox bypass: use dangerouslyDisableSandbox: true
• Use sessions for iterative exploration
• See references/setup.md for troubleshooting