Trae

Type: full-code · Vendor: ByteDance · Language: TypeScript (Electron IDE) + Python (Trae Agent CLI) · License: proprietary (IDE) / open-source (Trae Agent CLI) · Status: active · Status in practice: emerging

Links: homepage docs

ByteDance's AI IDE family: the Trae IDE with a unified Chat-Builder interface and @Agent + MCP multi-agent system, the autonomous TRAE SOLO coding agent, and the open-source Trae Agent CLI that topped SWE-bench Verified.

Description. Trae is ByteDance's AI coding stack. The IDE provides a unified Chat-Builder interface and an @Agent system with MCP for multi-agent collaboration. TRAE SOLO is positioned as a more autonomous responsive coding agent for real-world software development, with a mobile variant added in 2026. Separately, the open-source Trae Agent CLI (github.com/bytedance/trae-agent) ranked #1 on SWE-bench Verified with Claude 4 and provides a transparent, modular architecture researchers can extend; it supports MCP servers and a toolkit of file editing, bash execution and 'sequential thinking'.

Agent loop shape. Three surfaces. (1) Trae IDE Chat-Builder: user task in chat is routed to @Agent which composes tool calls and (optionally) sub-agents over MCP. (2) TRAE SOLO: more autonomous loop that executes longer, higher-trust workflows responsively. (3) Trae Agent CLI: a Python ReAct-style CLI taking a natural-language task, running tools (file editing, bash execution, sequential thinking) and optional MCP servers, until the task is done.

Primary use cases

AI-assisted coding inside the Trae IDE
autonomous coding sessions via TRAE SOLO
research and benchmarking via the open-source Trae Agent CLI
MCP-driven multi-agent code workflows

flowchart TD USER[User] --> SURFACE{Surface} SURFACE -->|IDE| IDE[Trae IDE<br/>Chat-Builder] SURFACE -->|autonomous| SOLO[TRAE SOLO] SURFACE -->|open-source| CLI[Trae Agent CLI] IDE --> AGENTSYS[@Agent system] AGENTSYS --> MCP[MCP servers / sub-agents] CLI --> LOOP[ReAct loop] LOOP --> TOOLS[file edit / bash / sequential thinking] LOOP --> MCP TOOLS --> LOOP MCP --> LOOP

Key concepts

Chat-Builder unified interface (docs) — The Trae IDE's single surface combining conversational chat with a builder mode that produces concrete changes.
@Agent system → agent-as-tool-embedding (docs) — Mention-based agent invocation that lets the user (or another agent) call a specific agent and pass context.
MCP multi-agent collaboration → mcp (docs) — MCP is the protocol Trae uses to compose multiple agents and external tool servers.
TRAE SOLO (docs) — Autonomous coding agent variant positioned for real-world software work; mobile variant added 2026.
Trae Agent CLI (docs) — Open-source Python CLI for general software-engineering tasks; tops SWE-bench Verified.
Sequential thinking tool → extended-thinking (docs) — Built-in 'thinking' tool inside the Trae Agent toolkit alongside file editing and bash execution.