Claude Code Bash Patterns

Claude Code Bash Patterns

Status: Production Ready ✅ | Last Verified: 2025-11-18

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Quick Start

Basic Command

ls -la

Command Chaining

bun install && bun run build && bun test

Hooks

Create .claude-hook-pretooluse.sh:

#!/usr/bin/env bash
# PreToolUse hook - runs before every Bash command

echo "Running: $1"

Load references/hooks-examples.md for complete hook patterns.

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The Five Core Patterns

1. Sequential Operations (&&)

Use when: Each command depends on previous success

git add . && git commit -m "message" && git push

Why: Stops chain if any command fails

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2. Parallel Operations (Multiple tool calls)

Use when: Commands are independent

Message with multiple Bash tool calls in parallel

Load references/cli-tool-integration.md for parallel patterns.

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3. Session Persistence

Use when: Need to maintain state across commands

# Set environment variable
export API_KEY="sk-..."

# Use in later commands (same session)
curl -H "Authorization: Bearer $API_KEY" api.example.com

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4. Background Processes