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Guide for delegating tasks to external AI CLI tools using gemini, copilot-cli, codex, and qwen-coder skills.
CLI delegation enables Claude Code to offload specific tasks to external AI coding assistants. This is useful when:
| Skill | Model Family | Best For | Not Recommended For |
|---|---|---|---|
gemini | Google Gemini | Large context analysis, fast iterations | Complex multi-file refactoring |
copilot-cli | Claude, GPT, Gemini | Multi-model comparison, flexible model choice | Single-model focused tasks |
codex | OpenAI (o-series, GPT-5.3-codex) | Advanced code generation, architectural design | Simple tasks, quick queries |
qwen-coder | Alibaba Qwen | Deep reasoning, second opinion | Production code generation |
All CLI skills follow a similar pattern:
Task Complexity
│
├── Simple (< 50 lines, single file)
│ └── gemini-3-flash, qwen2.5-coder, o4-mini
│
├── Moderate (50-200 lines, 1-3 files)
│ └── gemini-3-pro, gpt-5.2, claude-sonnet-4.6
│
└── Complex (> 200 lines, architecture, multi-file)
└── gpt-5.3-codex, o3, gemini-3-pro, qwq| Mode | Use Case | Risk Level |
|---|---|---|
plan | Read-only analysis, security reviews | Low |
default | General coding tasks with confirmation | Medium |
auto_edit | Trusted modifications with oversight | High |
yolo | Experimental tasks only | Very High |
All delegated prompts should be:
Prompt Template:
Task: <clear objective>
Context: <project/module/files>
Constraints: <do/don't constraints>
Expected output: <format + depth>
Validation: <tests/checks to run># Quick analysis with flash
gemini -p "Analyze architecture" -m gemini-3-flash
# Deep analysis with pro
gemini -p "Analyze architecture" -m gemini-3-pro --approval-mode plan
# Structured output
gemini -p "Return JSON refactoring opportunities" --output-format json# Basic delegation
copilot -p "Refactor service" --model gpt-5.2 --allow-all-tools
# Multi-model comparison
copilot -p "Compare" --model claude-sonnet-4.6
copilot -p "Compare" --model gpt-5.2
# Session resume
copilot --resume <session-id># Code generation
codex exec "Generate REST API" -m gpt-5.3-codex
# Code review
codex review "Review for security" -a on-request -s read-only
# Complex refactoring
codex exec "Refactor to SOLID" -m gpt-5.3-codex -a on-request -s workspace-write# Basic delegation
qwen -p "Analyze code" -m qwen2.5-coder
# Deep reasoning
qwen -p "Analyze architecture" -m qwq --approval-mode plan
# Session resume
qwen -c <session-id>plan mode for analysis tasksread-only or workspace-write sandbox for Codexyolo mode unless explicitly requested| Error | Cause | Solution |
|---|---|---|
| CLI not found | Tool not installed | Install the CLI tool |
| Authentication failed | Invalid credentials | Run auth command (nlm login, qwen auth) |
| Permission denied | Insufficient permissions | Use appropriate --allow-* flags |
| Rate limit exceeded | API throttling | Wait and retry with backoff |
┌─────────────────────────────────────────────────────┐
│ User Request │
└─────────────────┬───────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ Claude Code │
│ - Understands request │
│ - Determines if delegation is beneficial │
│ - Invokes appropriate skill │
└─────────────────┬───────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ CLI Skill │
│ - Converts to English prompt │
│ - Selects model and flags │
│ - Executes delegation │
└─────────────────┬───────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────┐
│ External CLI Result │
│ - Presented to user for review │
│ - User confirms before applying changes │
└─────────────────────────────────────────────────────┘Do not delegate when:
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