A curated, verified, cross-vendor directory of AI agent harnesses — the runtime scaffolding that turns a model into an agent.
◆ 74 harnesses profiled · 9-axis capability schema · last verified 2026-07-08
Warp is a Rust-based GPU-accelerated 'Agentic Development Environment' (terminal app, source opened April 2026 under dual MIT/AGPL) distinguished by running multiple agents in parallel — including hosting Claude Code, Codex, and Gemini CLI — plus Oz, its cloud orchestrator for autonomous background agents, with BYOK and credit-based pricing.
ByteDance's VS Code-based AI IDE, notable for aggressive pricing (free tier plus $3-$100/mo token-based tiers, restructured Feb 2026) and the SOLO mode (standalone app since March 31, 2026) that acts as an end-to-end 'context engineer' handling requirements, code, terminal, browser testing and deployment, with MCP (stdio/SSE/streamable HTTP) and custom agents — but persistent privacy/telemetry concerns.
Google's agent-first development platform (launched Nov 2025, Antigravity 2.0 at I/O 2026 moved it toward a production standalone desktop app), distinguished by its Agent Manager 'mission control' that orchestrates parallel agents across editor, terminal, and an embedded browser subagent, with agents producing reviewable Artifacts (plans, screenshots, browser recordings) and a persistent knowledge/learnings base; runs Gemini 3 alongside Claude and GPT-OSS models.