Plugin System Overview
Overview of the Claude Code plugin system. This article provides complete code examples and terminal operation demonstrations.
Quick Start
Start Claude Code in the terminal:
bash
claude
You: Help me implement a Claude Code plugin system overview
Claude: Sure, let me check the project structure first...
Claude wants to:
- Read file: src/main.py
Allow? [y/n/always/never]
You: y
Claude: Let me implement this feature for you...Press Shift+Tab to switch permission modes:
bash
# Normal Mode -> Auto-Accept Mode -> Plan Mode
# Auto-Accept: Auto execute (bottom bar shows accept edits on)
You: Quick implementation
Claude: [Auto executes, no confirmation needed]
# Plan Mode: Read-only (bottom bar shows plan mode on)
You: Make a plan first
Claude: [Only makes a plan, does not execute]Core Concepts
bash
You: Explain the core concepts of the plugin system overview
Claude: The core concepts of the Claude Code plugin system overview include...python
from anthropic import Anthropic
client = Anthropic()
response = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=1024,
messages=[{"role": "user", "content": "Claude Code plugin system overview"}]
)
print(response.content[0].text)Implementation Steps
1. Environment Setup
bash
# Install dependencies
pip install anthropic
# Configure API Key
export ANTHROPIC_API_KEY="your-api-key"2. Core Implementation
bash
You: Help me implement the core plugin system overview functionality
Claude: Sure, let me create the implementation file...
Claude wants to:
- Write file: src/plugin_overview.py
Allow? [y/n/always/never]
You: y
Claude: File created.python
# Plugin System Overview core implementation
from anthropic import Anthropic
client = Anthropic()
def process(query: str) -> str:
"""Process user request"""
response = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=2048,
messages=[{"role": "user", "content": query}]
)
return response.content[0].text
if __name__ == "__main__":
result = process("Claude Code plugin system overview")
print(result)3. Test Verification
bash
You: Run tests to verify the implementation
Claude: Sure, let me run the tests...
Claude wants to:
- Run command: python -m pytest tests/
Allow? [y/n/always/never]
You: y
Claude: All tests passedAdvanced Usage
python
# Using streaming output
with client.messages.stream(
model="claude-sonnet-4-6",
max_tokens=2048,
messages=[{"role": "user", "content": "Claude Code plugin system overview"}]
) as stream:
for text in stream.text_stream:
print(text, end="", flush=True)bash
# Using tool calls
tools = [{
"name": "process",
"description": "Claude Code plugin system overview",
"input_schema": {
"type": "object",
"properties": {
"query": {"type": "string"}
},
"required": ["query"]
}
}]
response = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=1024,
tools=tools,
messages=[{"role": "user", "content": "Claude Code plugin system overview"}]
)Performance Optimization
python
# Use Prompt Caching to reduce costs
response = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=1024,
system=[{
"type": "text",
"text": "You are a Claude Code plugin system overview expert...",
"cache_control": {"type": "ephemeral"}
}],
messages=[...]
)bash
# Check costs
/cost
# Switch to a faster model
/model haiku
# Use fast mode
/fastError Handling
python
from anthropic import APIError, APITimeoutError
try:
response = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=1024,
messages=[{"role": "user", "content": "request"}]
)
except APITimeoutError:
print("Request timed out, please retry")
except APIError as e:
print(f"API error: {e.status_code} - {e.message}")Best Practices
- Clear task descriptions - Tell Claude specifically what to do
- Provide context - Use CLAUDE.md or provide related code directly
- Verify step by step - Verify results after each step
- Use Plan Mode - Plan first for complex tasks
- Monitor costs - Use
/costto check API usage - Choose models wisely - Use Haiku for simple tasks, Opus for complex tasks
Permission Mode Reference
| Mode | Shortcut | Bottom Bar | Behavior |
|---|---|---|---|
| Normal | Default | No indicator | Confirm each operation |
| Auto-Accept | Shift+Tab x1 | accept edits on | Auto execute edits |
| Plan | Shift+Tab x2 | plan mode on | Only make plans |
Common Commands Reference
bash
/help # View help
/clear # Clear history
/model opus # Switch to Opus 4.6
/model sonnet # Switch to Sonnet 4.6
/model haiku # Switch to Haiku 4.5
/cost # Check costs
/fast # Fast mode
/quit # Exit