Gemini CLI support

[lichanghao]

I tweaked ralph.sh a little bit to add a parallel logic flow to support Gemini CLI. The prompt file GEMINI.md is also added (a renamed version of CLAUDE.md).

Usage:

./scripts/ralph/ralph.sh --tool gemini

[greptile-apps]

Greptile Overview

Greptile Summary

Added Gemini CLI as a third supported AI tool option alongside Amp and Claude Code, following the existing pattern for tool integration.

Key Changes:

• Updated ralph.sh to accept --tool gemini flag with corresponding validation and execution logic
• Created GEMINI.md prompt file by adapting CLAUDE.md with tool-specific references updated
• Gemini execution uses gemini --yolo < GEMINI.md command pattern

Note: This PR does not update README.md or AGENTS.md to document the new Gemini CLI support, which should be added for completeness.

Confidence Score: 4/5

• This PR is safe to merge with minor documentation gaps
• The implementation cleanly follows the existing pattern for adding new AI tool support (amp/claude), with proper validation and consistent structure. The --yolo flag should be verified for the gemini CLI, and documentation files should be updated to mention Gemini support.
• Verify that the --yolo flag is correct for gemini CLI in ralph.sh:94

Important Files Changed

Filename	Overview
ralph.sh	Added gemini CLI support with new conditional branch and validation logic; implementation follows existing pattern but lacks documentation updates
GEMINI.md	New prompt file for Gemini CLI; direct adaptation of CLAUDE.md with consistent structure and instructions

Sequence Diagram

sequenceDiagram
    participant User
    participant ralph.sh
    participant Gemini CLI
    participant FileSystem
    
    User->>ralph.sh: ./ralph.sh --tool gemini [max_iterations]
    ralph.sh->>ralph.sh: Parse arguments (TOOL=gemini)
    ralph.sh->>ralph.sh: Validate tool choice (amp/claude/gemini)
    ralph.sh->>FileSystem: Check for prd.json
    ralph.sh->>FileSystem: Initialize/check progress.txt
    
    loop For each iteration (1 to MAX_ITERATIONS)
        ralph.sh->>ralph.sh: Start iteration i
        alt tool == "amp"
            ralph.sh->>FileSystem: Read prompt.md
            ralph.sh->>Gemini CLI: amp --dangerously-allow-all
        else tool == "gemini"
            ralph.sh->>FileSystem: Read GEMINI.md
            ralph.sh->>Gemini CLI: gemini --yolo < GEMINI.md
            Gemini CLI->>FileSystem: Read prd.json
            Gemini CLI->>FileSystem: Read progress.txt
            Gemini CLI->>Gemini CLI: Implement user story
            Gemini CLI->>Gemini CLI: Run quality checks
            Gemini CLI->>FileSystem: Commit changes
            Gemini CLI->>FileSystem: Update prd.json (passes=true)
            Gemini CLI->>FileSystem: Append to progress.txt
            Gemini CLI-->>ralph.sh: OUTPUT (with potential COMPLETE signal)
        else tool == "claude"
            ralph.sh->>FileSystem: Read CLAUDE.md
            ralph.sh->>Gemini CLI: claude --dangerously-skip-permissions --print
        end
        
        ralph.sh->>ralph.sh: Check OUTPUT for "<promise>COMPLETE</promise>"
        alt All stories complete
            ralph.sh->>User: Exit with success (iteration i)
        else More stories remaining
            ralph.sh->>ralph.sh: Continue to next iteration
        end
    end
    
    ralph.sh->>User: Exit: Max iterations reached

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[greptile-apps]

_{1 file reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

verify that --yolo is the correct flag for gemini CLI - flag is undocumented and should be confirmed

Prompt To Fix With AI

This is a comment left during a code review.
Path: ralph.sh
Line: 94:94

Comment:
verify that `--yolo` is the correct flag for gemini CLI - flag is undocumented and should be confirmed

How can I resolve this? If you propose a fix, please make it concise.