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Course Outline
Introduction to OpenAI Codex CLI
- Understanding what Codex CLI is and its 2025 open-source Rust architecture
- Core features: prompt handling, file operations, bash execution, and multi-step tasks
- Comparison with Claude Code and other terminal agents
- Overview of approval modes and security boundaries
Installation and Setup
- Installing Codex CLI on macOS and Linux systems
- Configuring API keys for OpenAI and compatible providers
- Connecting to local backends via Ollama and Atomic Chat
- Setting up SSH and remote development environments
Core Workflow Commands
- Running single prompts and multi-turn sessions
- Performing file read, write, and edit operations via prompts
- Executing shell commands and managing piped outputs
- Managing working directories and project context
Approval Modes and Safety
- Configuring automatic, ask-before-execute, and fully manual execution modes
- Sandboxing techniques and managing read-only versus write-enabled sessions
- Safely handling destructive commands and file deletions
Git and CI Integration
- Using Codex CLI to generate commits and diffs
- Implementing pre-commit hooks with agent-based review
- Running Codex CLI in headless CI environments
- Integrating with GitHub Actions and GitLab CI
MCP Server Integration
- Connecting to Model Context Protocol servers
- Extending tool capabilities through custom MCP endpoints
- Developing internal MCP tools for proprietary systems
Multi-Backend Support
- Switching between OpenAI, Gemini, and GitHub Models APIs
- Conducting local inference with Ollama and self-hosted endpoints
- Strategies for model selection balancing latency and quality
Team Deployment and Governance
- Managing shared configurations and secrets
- Establishing usage policies and audit logging for enterprise environments
- Standardizing team prompts and defining guardrails
Custom Prompts and Workflows
- Creating reusable prompt templates
- Chaining tasks for complex refactoring projects
- Processing multiple files and repositories in batch mode
Performance Tuning
- Understanding Rust performance characteristics
- Optimizing token usage for large-scale projects
- Managing caching and session state effectively
Troubleshooting Common Issues
- Resolving connection failures to backends
- Debugging prompt ambiguity and misinterpretations
- Handling rate limiting and implementing retry strategies
Security Best Practices
- Protecting API keys in shared environments
- Preventing prompt injection and command hijacking
- Addressing data residency and compliance considerations
Summary and Next Steps
- Recapping core capabilities and workflows
- Exploring community resources and opportunities for open-source contributions
- Transitioning to advanced multi-agent orchestration topics
Requirements
- Experience in software development using any programming language
- Familiarity with basic command-line and terminal operations
- Understanding of fundamental Git concepts
Audience
- Software developers seeking to incorporate AI terminal agents into their workflow
- DevOps engineers investigating Rust-based AI tools
- Team leaders assessing OpenAI Codex CLI for organizational adoption
14 Hours
