Coding agent products (IDEs, CLIs, full suites)
Turnkey coding agents you install and run: IDE extensions, terminal CLIs, Dockerized workspaces. Each entry notes which part is the harness (the agent loop, tool wiring, approval model) versus the UI shell (VS Code extension, TUI, browser client).
| # | Project | Stars | Tier | OSS | Description |
|---|---|---|---|---|---|
| 1 | opencode mcpprovider-agnosticclituitypescript | 209k | slightly complex | ✅ | Open-source terminal coding agent (formerly `sst/opencode`; transferred to anomalyco). The **harness** is a multi-provider tool-call loop (Claude, OpenAI, Gemini, local) with strong plugin and MCP support; the TUI is the shell. 100% OSS, very actively shipped. |
| 2 | Codex sandboxprovider-agnosticcli | 125k | slightly complex | ✅ | OpenAI's terminal coding agent. The **harness** is the sandboxed tool-call loop with multi-provider support; the CLI is the shell. Reference implementation for "official CLI that ships code." |
| 3 | pi provider-agnostictuirust | 108k | slightly complex | ❓ | The upstream AI agent toolkit behind this list's oh-my-pi fork: a unified multi-provider LLM API, agent loop, and TUI shell providing the **harness** that oh-my-pi's Rust rewrite builds on. |
| 4 | Gemini CLI mcpclitypescript | 107k | slightly complex | ✅ | Google's first-party terminal agent for Gemini. The **harness** is the plugin/MCP tool-call loop; the terminal is the shell—Google's parallel to Claude Code / Codex, not just an API. |
| 5 | OpenHands memorybrowsersandboxpython | 88.6k | complex | ⚠️ (multi-license) | Dockerized software-engineering agent. The **harness** is the bash/editor/browser toolset with micro-agents and event-stream session bridging; Docker is the sandbox. Main OSS choice for teams self-hosting autonomous repo work. |
| 6 | Cline idetypescript | 68.9k | slightly complex | ✅ | VS Code extension whose **harness** is a plan-then-act loop with per-step human approval and cost transparency; the VS Code integration is the UI shell. Open-source counterweight to Cursor. |
| 7 | Open Interpreter clipython | 68.4k | mostly simple | ✅ | Lightweight terminal coding agent oriented to open models (DeepSeek, Kimi, Qwen). The **harness** is a code-execution loop — the model writes code, the harness executes it with confirmation gates; the CLI is the shell. The original "let the LLM run code on my machine" project, reborn for open weights. |
| 8 | goose mcprust | 54.5k | slightly complex | ✅ | Block-originated Rust agent, now stewarded by the Linux Foundation's Agentic AI Foundation (`aaif-goose/goose`). The **harness** is the MCP/ACP extension model with recipes and provider choice; there's no fixed UI slot—you bolt it into whatever shell you use. |
| 9 | DeepSeek-Reasonix memoryclituitypescript | 35.6k | slightly complex | ❓ | DeepSeek-native terminal coding agent. The **harness** is engineered around prefix-cache stability for long-running sessions; the TUI is the shell. |
| 10 | oh-my-pi browserprovider-agnosticcliiderust | 32.1k | slightly complex | ✅ | Terminal coding agent (fork of Pi) that wires the IDE into the **harness**: hash-anchored edits, a 32-tool loop tuned per-model, LSP rename/references/diagnostics on every write, a real DAP debugger (lldb/dlv/debugpy), long-lived Python + Bun execution kernels that call back into the agent's tools, browser control, and 40+ providers (Claude/OpenAI/Gemini/local). ~55k-line Rust core. |
| 11 | crush memoryclitui | 28.2k | slightly complex | ⚠️ FSL-1.1-MIT | Charm's terminal coding agent (Charm's fork of the original OpenCode). The **harness** is the tool-calling loop with session persistence; the Bubble Tea TUI is the shell. |
| 12 | vibe-kanban | 28.1k | slightly complex | ❓ | Kanban-style fleet manager for running Claude Code, Codex, or any coding agent across many tasks at once. The **harness** contribution is the task-queue/review layer on top of whichever agent executes; not an agent loop itself. |
| 13 | qwen-code sandboxclitypescript | 28k | slightly complex | ❓ | Alibaba's official terminal coding agent, forked from Gemini CLI's agent loop and retuned for Qwen models. The **harness** is the same sandboxed tool-call loop as its upstream; the terminal is the shell. |
| 14 | Kilo Code mcpcliidetypescript | 27.4k | slightly complex | ❓ | VS Code extension and CLI in the Cline/Roo-Code lineage — a natural pick now that Roo-Code is archived upstream. The **harness** is an approval-gated autonomous-mode loop with a provider/tool marketplace; the IDE is the shell. |
| 15 | Symphony sandbox | 27.3k | complex | ❓ | OpenAI's harness for fanning a task out into many isolated, autonomous coding-agent implementation runs and surfacing the ones that pass, so a team manages outcomes instead of supervising each session. |
| 16 | Roo Code mcpworkflowidetypescript | 24.3k | slightly complex | ✅ | VS Code/Cursor extension in the Cline lineage. The **harness** is the approval-gated agent with custom modes and a strong MCP story; the IDE is the UI. Popular community fork when you want that workflow without the upstream extension. |
| 17 | Prime Agent memorymulti-agentclitypescript | 21.1k | slightly complex | ✅ | Prime Intellect's self-improving coding and research agent. The **harness** is a recursive language model loop (context as a variable, sub-agents as function calls inside a persistent IPython REPL) plus a Continual Harness that lets the agent create, read, update, and delete its own prompts, skills, memory, and sub-agents mid-run; daemon-backed sessions survive a closed terminal, and autonomous mode runs on turn, token, and time budgets. 95.5% on ARC-AGI-3 with Opus 5; the terminal UI is the shell. |
| 18 | jcode mcpmemoryprovider-agnosticclirust | 19.9k | slightly complex | ❓ | Rust terminal coding agent pitched as the most RAM-efficient **harness** in its class; MCP support, multi-provider (Claude/OpenAI). |
| 19 | eigent multi-agentlocal | 15.3k | complex | ❓ | Open-source desktop **harness** positioned as a local, free alternative to Claude Cowork and Codex: multi-agent workspace orchestration in a self-hosted app rather than a hosted product. |
| 20 | cc-haha memorymulti-agenttypescript | 14.7k | complex | ❓ | Local-first desktop workspace **harness** for Claude Code and other agents: multi-agent sessions, Git worktrees, code diffs, a skill marketplace, and chat-app access (WeChat, Telegram, WhatsApp). |
| 21 | claw-code-agent mcprustpythontypescript | 545 | slightly complex | ❓ | Python reimplementation of the Claude Code agent architecture with zero external dependencies; interactive chat, streaming, plugin runtime, nested agent delegation, cost tracking, MCP transport—portable harness without the Rust/TS toolchain. |
| 22 | Proliferate multi-agentsandboxidetypescript | 505 | complex | ✅ | Open-source AI IDE for Claude Code, Codex, OpenCode, and more. The **harness** contribution is the workspace/session orchestration layer: run multiple coding agents in parallel, locally or in the cloud, with isolated workspaces, reusable workflows, and shared team context. |
| 23 | AgentBox sandboxtypescript | 467 | slightly complex | ✅ | Runs multiple coding agents in parallel, each in its own sandboxed VM, locally or in the cloud, from one command. The **harness** contribution is the VM-per-agent isolation and fleet fan-out layer; whichever agent runs inside owns the loop. |
| 24 | YYLO multi-agenttypescript | 60 | slightly complex | ✅ | Command-line orchestrator for coding agents (drives Pi and Codex subagents): every task gets a dedicated branch/worktree and a typed lifecycle — read-only preflight, risk-scaled merge-queue review, release-readiness gates — with receipt-backed changes. The **harness** contribution is the git-native task/merge orchestration layer on top of whichever agent executes; not an agent loop itself. |