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claude-howto/openspec/changes/add-cli-lesson/proposal.md
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Luong NGUYEN ee0f4bd5d9 docs: Update slash commands documentation with official features
- Add comprehensive built-in commands reference (40+ commands)
- Document argument handling ($ARGUMENTS, $1, $2, etc.)
- Add bash execution syntax (! prefix) and file references (@ prefix)
- Update frontmatter to official fields (allowed-tools, argument-hint, model, etc.)
- Add Plugin Commands and MCP Slash Commands sections
- Add SlashCommand Tool documentation for programmatic invocation
- Add Skills vs Slash Commands comparison table
- Create commit.md example with bash execution and context
- Update existing examples to use official frontmatter format
- Add OpenSpec proposal for change tracking
2025-12-24 15:30:47 +01:00

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# Change: Add CLI Reference Lesson
## Why
The Claude How To repository covers nine major Claude Code features (01-09), but lacks a dedicated lesson for the CLI reference - the command-line interface that users interact with directly. Understanding CLI commands, flags, and options is fundamental to using Claude Code effectively. Users need a comprehensive reference to leverage features like model selection, output formats, permission management, and session handling via CLI.
## What Changes
- **NEW** `10-cli/` directory with comprehensive CLI reference lesson
- **NEW** `10-cli/README.md` - Main lesson content following established structure
- **UPDATE** Root `README.md` - Add CLI lesson to navigation and learning path
- **UPDATE** Root `README.md` - Add CLI to feature comparison and use case matrix
- **UPDATE** `LEARNING-ROADMAP.md` - Include CLI lesson in learning progression
## Key Content Areas
1. **CLI Commands** - Start interactive REPL, query mode, continue/resume sessions, updates
2. **Core Flags** - Print mode, continue, resume, version
3. **Model Configuration** - Model selection, fallback models, agent configuration
4. **System Prompt Customization** - Replace, append, file-based prompts
5. **Tool & Permission Management** - Allowed/disallowed tools, permission modes
6. **Output & Format** - JSON, stream-JSON, text formats
7. **MCP Configuration** - Server loading, strict mode
8. **Session Management** - Session IDs, forking, resumption
9. **Advanced Features** - Chrome integration, IDE connection, debug mode
## High-Value Use Cases
1. **CI/CD Integration** - Headless mode with JSON output for automation pipelines
2. **Script Piping** - Process files, logs, and data through Claude
3. **Multi-Session Workflows** - Resume and fork sessions for complex projects
4. **Custom Agent Configurations** - Define specialized subagents via CLI
5. **Batch Processing** - Process multiple queries with consistent settings
6. **Security-Conscious Development** - Permission modes and tool restrictions
7. **API Integration** - Structured JSON output for programmatic consumption
## Impact
- Affected specs: None (new capability)
- Affected code: Root README.md, LEARNING-ROADMAP.md
- New files: `10-cli/README.md`