Use when the user asks to run Gemini CLI for code review, plan review, or big context (>200k) processing. Ideal for comprehensive analysis requiring large context windows. Uses Gemini 3 Pro by default for state-of-the-art reasoning and coding.

Gemini Skill Guide When to Use Gemini WHEN ASKED TO BE ACTIVATED Code Review : Comprehensive code reviews across multiple files Plan Review : Analyzing architectural plans, technical specifications, or project roadmaps Big Context Processing : Tasks requiring 200k tokens of context (entire codebases, documentation sets) Multi file Analysis : Understanding relationships and patterns across many files ⚠️ Critical: Background/Non Interactive Mode Warning NEVER use approval mode default in background or non interactive shells (like Claude Code tool calls). It will hang indefinitely waiting for approval prompts that cannot be provided. For automated/background reviews: ✅ Use approval mode yolo for fully automated execution ✅ OR wrap with timeout: timeout 300 gemini ... ❌ NEVER use approval mode default without interactive terminal Symptoms of hung Gemini: Process running 20+ minutes with 0% CPU usage No network activity Process state shows 'S' (sleeping) Fix hung process: Running a Task 1. Ask the user (via AskUserQuestion ) which model to use in a single prompt . Available models: gemini 3 pro preview ⭐ (flagship model, best for coding & complex reasoning, 35% better at software engineering than 2.5 Pro) gemini 3 flash (sub second latency, distilled from 3 Pro, best for speed critical tasks) gemini 2.5 pro (legacy option, strong all around performance) gemini 2.5 flash (legacy option, cost efficient with thinking capabilities) gemini 2.5 flash lite (legacy option, fastest processing) 2. Select the approval mode based on the task: default : Prompt for approval (⚠️ ONLY for interactive terminal sessions) auto edit : Auto approve edit tools only (for code reviews with suggestions) yolo : Auto approve all tools (✅ REQUIRED for background/automated tasks) 3. Assemble the command with appropriate options: m, model <MODEL Model selection approval mode <default auto edit yolo Control tool approval y, yolo Alternative to approval mode yolo i, prompt interactive "prompt" Execute prompt and continue interactively include directories <DIR Additional directories to include in workspace s, sandbox Run in sandbox mode for isolation 4. For background/automated tasks, ALWAYS use approval mode yolo or add timeout wrapper. NEVER use default in non interactive shells. 5. Run the command and capture the output. For background/automated mode: 6. For interactive sessions with an initial prompt: 7. After Gemini completes , inform the user: "The Gemini analysis is complete. You can start a new Gemini session for follow up analysis or continue exploring the findings." Quick Reference Use case Approval mode Key flags Background code review yolo ✅ m gemini 3 pro preview approval mode yolo Background analysis yolo ✅ m gemini 3 pro preview approval mode yolo Background with timeout yolo ✅ timeout 300 gemini m gemini 3 pro preview approval mode yolo Interactive code review default m gemini 3 pro preview approval mode default (interactive terminal only) Code review with auto edits auto edit m gemini 3 pro preview approval mode auto edit Automated refactoring yolo m gemini 3 pro preview approval mode yolo Speed critical background yolo ✅ m gemini 3 flash approval mode yolo Cost optimized background yolo ✅ m gemini 2.5 flash approval mode yolo Multi directory analysis yolo (if background) include directories <DIR1 include directories <DIR2 Interactive with prompt auto edit or default i "prompt" approval mode <mode Model Selection Guide Model Best for Context window Key features gemini 3 pro preview ⭐ Flagship model : Complex reasoning, coding, agentic tasks 1M input / 64k output Vibe coding, 76.2% SWE bench, $2 4/M input gemini 3 flash Sub second latency, speed critical applications 1M input / 64k output Distilled from 3 Pro, TPU optimized gemini 2.5 pro Legacy: Strong all around performance 1M input / 65k output Thinking mode, mature stability gemini 2.5 flash Legacy: Cost efficient, high volume tasks 1M input / 65k output Best price ($0.15/M), thinking mode gemini 2.5 flash lite Legacy: Fastest processing, high throughput 1M input / 65k output Maximum speed, minimal latency Gemini 3 Advantages : 35% higher accuracy in software engineering, state of the art on SWE bench (76.2%), GPQA Diamond (91.9%), and WebDev Arena (1487 Elo). Knowledge cutoff: January 2025. Coming Soon : gemini 3 deep think for ultra complex reasoning with enhanced thinking capabilities. Common Use Cases Code Review (Background/Automated) Plan Review (Background/Automated) Big Context Analysis (Background/Automated) Interactive Code Review (Terminal Only) Following Up Gemini CLI sessions are typically one shot or interactive. Unlike Codex, there's no built in resume functionality. For follow up analysis, start a new Gemini session with context from previous findings. When proposing follow up actions, restate the chosen model and approval mode. Use AskUserQuestion after each Gemini command to confirm next steps or gather clarifications. Error Handling Stop and report failures whenever gemini version or a Gemini command exits non zero. Request direction before retrying failed commands. Before using high impact flags ( approval mode yolo , y , sandbox ), ask the user for permission using AskUserQuestion unless already granted. When output includes warnings or partial results, summarize them and ask how to adjust using AskUserQuestion . Troubleshooting Hung Gemini Processes Detection Diagnosis Resolution Prevention ALWAYS use approval mode yolo for background/automated tasks Add timeout wrapper for safety: timeout 300 gemini ... Never use approval mode default in non interactive shells Monitor first run with ps to ensure process completes Tips for Large Context Processing 1. Be specific : Provide clear, structured prompts for what to analyze 2. Use include directories : Explicitly specify all relevant directories 3. Choose the right model : Use gemini 3 pro preview for complex reasoning, coding tasks, and maximum analysis quality (recommended default) Use gemini 3 flash for speed critical tasks requiring sub second response times Use gemini 2.5 flash for cost optimized high volume processing 4. Leverage Gemini 3's strengths : 35% better at software engineering tasks, exceptional at agentic workflows and vibe coding 5. Break down complex tasks : Even with large context, structured analysis is more effective 6. Save findings : Ask Gemini to output structured reports that can be saved for reference CLI Version Requires Gemini CLI v0.16.0 or later for Gemini 3 model support. Check version: gemini version