Coding agent · Harness / Agent

DeerFlow

Verified Aug 2026

Quick answer: Self-hosted long-horizon coding + research agents with Docker AIO sandboxes, skills, memory, and subagents (MIT BYOK) when a single IDE chat is not enough.

Best for

Self-hosted long-horizon coding + research agents with Docker AIO sandboxes, skills, memory, and subagents (MIT BYOK) when a single IDE chat is not enough.

Skip if

You want a lightweight Cursor/Cline daily driver without Docker ops, or a hosted vibe builder with no self-host burden.

Who it fits

  • Self-hosted long-horizon coding + research agents with Docker AIO sandboxes, skills, memory, and subagents (MIT BYOK) when a single IDE chat is not enough.
  • Builders who start in the browser without a local IDE setup
  • Terminal-first engineers who live in the shell and git

Pros

ByteDance MIT SuperAgent harness (2.0 rewrite) that researches, codes, and creates via Docker AIO sandboxes (browser/shell/file/MCP/VS Code Server), skills, memory, and parallel subagents; multi-model (Doubao/DeepSeek/OpenAI/Gemini/etc.) plus Claude Code OAuth/integration; self-hosted app + harness SDK.

Cons

Ops-heavy (Docker RAM/CPU for long multi-agent runs); broader than a daily IDE coding agent — research/create workloads share the runtime; ByteDance/Volcengine model push in docs.

Facts

Locality:
Hybrid (local + cloud)
Surfaces:
Web, CLI
Maturity:
General availability
BYOK:
Bring your own API key
Open source:
Source available
Free tier:
Free option available
MCP:
Model Context Protocol support
Verified:
Aug 2026

Agent standards & memory

AGENTS.md: PartialSKILL.md: SupportedRules / memory: Long/short-term memory; sandbox FS; skill modules; subagent session state.100% Free (Open-source, MIT, BYOK).

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Alternatives

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