Cline CLI brings Cline's IDE-origin agent into terminal and headless workflows. It is relevant to CLI-agent comparisons because Cline now exposes command-line operation, SDK integration, MCP, plugins, hooks, skills, rules, connectors, and machine-readable output.
Key capabilities
Terminal and headless operation - Supports interactive use plus headless triggers with --json, stdin/stdout, --auto-approve, timeout, cwd/config/data-dir, and NDJSON output.
Plan and Act workflows - Carries Cline's planning and acting model into a command-line context.
MCP and plugins - Supports cline mcp, plugins, hooks, skills, rules, connectors, and SDK lifecycle hooks.
Autonomy level
Level 3 (supervised agent): headless and auto-approve modes can raise risk and require careful policy.
Strengths
- Open-source Apache-2.0 repository
- Strong MCP and plugin ecosystem
- Headless output makes it viable for automation and orchestration
Limitations
- IDE-origin behavior may not behave like a terminal-first agent
- VS Code extension location is migrating, and JetBrains plugin is not open-sourced
- DevThrottle still needs terminal-mode and history-store measurements