Cline
Cline (formerly claude-dev) is an open-source autonomous coding agent extension for VS Code. The project is available at github.com/cline/cline (originally saoudrizwan/claude-dev). It integrates directly into the VS Code editor and can read and write files, execute terminal commands, browse the web, and use the VS Code API — all with explicit user approval at each step. It supports multiple LLM backends including Claude, GPT-4, Gemini, and local models via Ollama.
The agent loop: the user describes a task; Cline proposes a plan; each action (file edit, command execution, browser navigation) requires approval before proceeding. Diffs are shown before applying. The approval-at-each-step model distinguishes it from fully autonomous agents that act without checkpoints.
Placed in Tools / Assess / inner.
Cline occupies the autonomous coding agent tier above GitHub Copilot (autocomplete/chat) and below fully autonomous pipelines. It handles tasks that require multi-file changes, shell commands, and iterative feedback — refactoring a module, setting up a project scaffold, migrating a test suite — while keeping the developer in the approval loop for every action.
The open-source model is a meaningful differentiator: the system prompt is visible, the agent behaviour is auditable, and alternative LLM backends mean no vendor lock-in to a single AI provider. This contrasts with Cursor (proprietary) and GitHub Copilot Workspace (GitHub-hosted).
Inner position reflects direct applicability to any VS Code user working on substantive coding tasks, the approval-loop safety model making it actionable without significant trust risk, and broad LLM backend support including local Ollama models.
Trial gate: at least one multi-file refactoring or project scaffolding task completed with Cline, with the agent's proposed changes reviewed and approved incrementally.
