The coding-agent frontier

Crossed 350k GitHub stars in early April 2026 — fastest community-growth curve ever recorded for an open-source agent product. Founder joined OpenAI; project transitioned to foundation governance. The defining signal that open-source autonomous coding agents have caught up to (and on some workloads, surpassed) closed-source flagships.

Architecture: Anthropic-style reasoning loop (thinking → planning → execution decomposition) instead of ReAct-style tool-call loops. MCP-first dispatcher treats built-ins as MCP servers internally. The architectural break that explains the velocity advantage on complex tasks.

The longest-track-record open-source autonomous coding agent. Planning Mode in v1.6+ closed the 'agent loops without making progress' gap that plagued earlier products. Currently the most stable production deployment in the category — pick OpenHands when reliability matters more than velocity (compare to OpenClaw).

Architecture: ReAct-style loops, MCP-first tool dispatcher, sandbox executor with Docker / chroot / native modes. The /stacks/local-coding-agent canonical recipe is built around OpenHands.

VS Code-native autonomous agent. Picked up Roo Code's user base after that project shut down in May 2026. Stronger autonomous-task capability than Continue; lighter than OpenHands. The current frontrunner in the IDE-resident agent category.

Architecture: Lives inside VS Code rather than in a separate window — different UX paradigm from OpenHands. MCP support; talks to any OpenAI-compatible runtime.

Block's MCP-first agent. Differentiates by treating MCP as the primary extension surface (not as one of many). Strong support for both stdio and remote MCP; the right pick when MCP-heaviness is core to your workflow rather than incidental.

Architecture: Designed as an extension platform — built-in tools are minimal; everything substantial wires in via MCP. Lighter-weight than OpenHands; stronger MCP integration than OpenClaw.

Different paradigm from OpenHands/OpenClaw — git-integrated CLI editor for surgical commits, not autonomous task execution. The right pick when you want the agent under tight control rather than driving the workflow. Stable / mature; no recent architectural shifts but consistent shipping cadence.

Architecture: CLI-first; git-aware by design. Each session = one focused commit. Pairs naturally with Ollama for solo workflows.

The broadest VS Code AI assistant — chat + autocomplete + commands. Stable; doesn't move as fast as Cline, but covers more surface area. Pick Continue for everyday IDE help; pick Cline for autonomous tasks specifically.

Architecture: More LangChain-style than autonomous-agent style — orchestrates LLM calls into IDE workflows rather than driving multi-step tasks.

Shut down May 15, 2026. Users migrating to Cline (the canonical migration target) or to roomote.dev (the founders' next project). Listed here as a deliberate signal: the coding-agent category remains volatile; depend on stable upstreams (OpenHands, OpenClaw) before betting infrastructure on a single project.