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Add 260+ Claude Code skills from skills.sh

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Complete collection of AI agent skills including:
- Frontend Development (Vue, React, Next.js, Three.js)
- Backend Development (NestJS, FastAPI, Node.js)
- Mobile Development (React Native, Expo)
- Testing (E2E, frontend, webapp)
- DevOps (GitHub Actions, CI/CD)
- Marketing (SEO, copywriting, analytics)
- Security (binary analysis, vulnerability scanning)
- And many more...

Synchronized from: https://skills.sh/

Co-Authored-By: Claude <noreply@anthropic.com>
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---
name: gemini
description: 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:**
```bash
# Check if hung
ps aux | grep gemini | grep -v grep
# Kill if necessary
pkill -9 -f "gemini.*gemini-3-pro-preview"
```
## 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:
```bash
# Recommended: Use yolo for background tasks
gemini -m gemini-3-pro-preview --approval-mode yolo "Review this codebase for security issues"
# Or with timeout (5 min limit)
timeout 300 gemini -m gemini-3-pro-preview --approval-mode yolo "Review this codebase"
```
6. For interactive sessions with an initial prompt:
```bash
gemini -m gemini-3-pro-preview -i "Review the authentication system" --approval-mode auto_edit
```
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)
```bash
# For background execution (Claude Code, CI/CD, etc.)
gemini -m gemini-3-pro-preview --approval-mode yolo \
"Perform a comprehensive code review focusing on:
1. Security vulnerabilities
2. Performance issues
3. Code quality and maintainability
4. Best practices violations"
# With timeout safety (5 minutes)
timeout 300 gemini -m gemini-3-pro-preview --approval-mode yolo \
"Perform a comprehensive code review..."
```
### Plan Review (Background/Automated)
```bash
# For background execution
gemini -m gemini-3-pro-preview --approval-mode yolo \
"Review this architectural plan for:
1. Scalability concerns
2. Missing components
3. Integration challenges
4. Alternative approaches"
```
### Big Context Analysis (Background/Automated)
```bash
# For background execution
gemini -m gemini-3-pro-preview --approval-mode yolo \
"Analyze the entire codebase to understand:
1. Overall architecture
2. Key patterns and conventions
3. Potential technical debt
4. Refactoring opportunities"
```
### Interactive Code Review (Terminal Only)
```bash
# ONLY use default mode in interactive terminal
gemini -m gemini-3-pro-preview --approval-mode default \
"Review the authentication flow for security issues"
```
## 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
```bash
# Check for hung processes
ps aux | grep -E "gemini.*gemini-3" | grep -v grep
# Look for these symptoms:
# - Process running 20+ minutes
# - CPU usage at 0%
# - Process state 'S' (sleeping)
# - No network connections
```
### Diagnosis
```bash
# Get detailed process info
ps -o pid,etime,pcpu,stat,command -p <PID>
# Check network activity
lsof -p <PID> 2>/dev/null | grep -E "(TCP|ESTABLISHED)" | wc -l
# If result is 0, process is hung
```
### Resolution
```bash
# Kill hung Gemini processes
pkill -9 -f "gemini.*gemini-3-pro-preview"
# Or kill specific PID
kill -9 <PID>
# Verify cleanup
ps aux | grep gemini | grep -v grep
```
### 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`