$ find your agent harness

AWS's Claude-powered agentic IDE (VS Code fork; launched internationally May 7, 2026 as the successor to Amazon Q Developer) whose signature is spec-driven development — generating requirements.md/design.md/tasks.md with EARS acceptance criteria before coding — plus event-driven agent hooks, steering files, AGENTS.md/Skills.md/MCP support, and 'Kiro Powers' pre-packaged AWS MCP servers; the GitHub repo (3,980 stars) is a public issue tracker, not the source.

Sourcegraph's opinionated no-model-picker coding agent (CLI + VS Code extension), distinguished by curated multi-model design with specialized subagents (Oracle for reasoning, Librarian for library research), Toolboxes (UNIX-script custom tools), skills with bundled MCP servers, and an ad-supported free mode alongside zero-markup pay-as-you-go credits.

VS Code-fork AI IDE whose Agent mode plus in-house Composer models, Background/Cloud Agents (isolated cloud VMs that report back as PRs), hooks, skills, and an agent SDK make it the most fully-built-out commercial agentic IDE; Composer 2 scored 61.7% on Terminal-Bench 2.0 and Composer 2.5 79.8% on SWE-bench Multilingual (SWE-bench Verified not reported).

The Windsurf AI IDE's Cascade agent, post-Cognition-acquisition, was rebranded to Devin Desktop (June 2, 2026) with Cascade deprecated (available through July 1, 2026) in favor of the Rust-rewritten 'Devin Local' agent (30% more token-efficient, subagents), pairing local agentic editing (Fast Context codebase awareness, MCP, Memories, Workflows) with Devin cloud sessions for background work.

JetBrains' autonomous coding agent for IntelliJ-family IDEs (plus a Junie CLI that left beta March 2026 with BYOK/OpenRouter routing and CI/CD support), distinguished by leverage of the IDE's code index, a confirmation-gated loop with opt-in 'Brave Mode', Docker/worktree-isolated parallel tasks, remote cloud execution mode, and a companion Claude Agent built on Anthropic's Agent SDK.

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.

The viral general-purpose autonomous agent that plans and executes multi-step tasks in a cloud VM (browsing, code, docs, slides), notable for Wide Research parallel sub-agents and for Meta's $2B acquisition being blocked by China's NDRC in April 2026.

Credit-based all-in-one 'AI employee' workspace whose Super Agent mixes multiple frontier models with 80+ tools to produce slides, sheets, sites, and calls, and whose 2026 'Genspark Claw' gives each user a persistent cloud computer commandable from WhatsApp/Telegram/Slack/Teams.

Cloud web-agent from DeepMind-alumni startup H Company ($220M seed) that orchestrates sub-agents over its own Holo vision-language action models (92.2% WebVoyager at ~$0.13/task via open-sourced Surfer-H), with Holo 3 in 2026 targeting any-UI enterprise automation.

Perplexity's Chromium-based agentic browser (free on all four platforms since April 2026) whose sidebar assistant reads pages and tabs and executes web tasks in the user's own browser, extended by 'Personal Computer' on Mac to local file editing, local computer use, and voice orchestration.