DeepSeek Harness
Canonical page on the main site: sinoaihub.com/agents/deepseek-harness
Type
agent
Key facts
- Company: DeepSeek
- Type: framework
- Underlying models: DeepSeek-V4.1-Flash, DeepSeek-V4-Pro
- Capabilities: tool calling, browser use, computer use, MCP
- Open source: yes (MIT)
- Pricing: Software itself free and open source. Model usage billed by the configured provider (DeepSeek API pay-as-you-go: flash $0.15-$0.30/M input cache-miss, $0.60-$1.20/M output, off-peak = half of peak; v4-pro $0.66-$1.32/M input, $1.98-$3.96/M output).
Company
API Platform
Description
Open-source agent harness from DeepSeek ('Everything is a Plugin') that powers its coding agent. All capabilities - models, tools, skills, sessions, sandbox, storage, loops, scheduling and UI - are composed from replaceable plugins. Developer preview; ships as CLI (dsh), Web UI, Electron Desktop app, Python SDK and ACP server.
Agent Type
framework
Underlying Models
Framework
Cordis
Tool Calling
Yes
Browser Use
Yes
Computer Use
Yes
Mcp
Yes
Memory
No
Planning
Yes
Multi Agent
Yes
Api
Yes
Pricing
Software itself free and open source. Model usage billed by the configured provider (DeepSeek API pay-as-you-go: flash $0.15-$0.30/M input cache-miss, $0.60-$1.20/M output, off-peak = half of peak; v4-pro $0.66-$1.32/M input, $1.98-$3.96/M output).
Deployment
self_hosted
Open Source
Yes
License
MIT
Github
https://github.com/deepseek-ai/deepseek-harness
Documentation
https://deepseek-harness.github.io/deepseek-harness/en/guide/quickstart
Use Cases
- Interactive coding-agent chat via Web UI
- Headless one-shot tasks via dsh --profile headless with a task prompt
- Embedding agents in Python programs (Python SDK)
- Programmatic multi-session automation over ACP (Agent Client Protocol)
- GitHub PR review via webhook overlay
- Custom profiles/plugins/presets for different agent compositions
Limitations
- Developer preview - compatibility-breaking changes expected; not security-audited, not production-ready (SAFETY.md)
- Sandboxing/approvals do not guarantee isolation - run untrusted work in a disposable VM or container
- Web server binds loopback only; trusted-host list required for LAN access
- No VS Code/editor extension found in repo; ACP is automation-only
- Image input only via deepseek-flash; deepseek-v4-pro is text-only
- OAuth providers (e.g. Codex) not yet supported; API-key providers only
- No built-in memory; third-party memory MCP servers are interoperability examples only
- sdk-minimal profile pins danger-full-access permissions by default
Verification Status
verified
Last Verified
2026-09-30
Source history
No documented source-change events located as of 2026-09-30.
Sources
| evidence_id | source_name | source_url | source_type | published | verified | confidence | conflict |
|---|---|---|---|---|---|---|---|
| src-agents-deepseek-harness-1 | DeepSeek Harness GitHub repository | https://github.com/deepseek-ai/deepseek-harness | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-2 | DeepSeek Harness product page | https://deepseek.com/harness | Official | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-3 | DeepSeek Harness documentation | https://deepseek-harness.github.io/deepseek-harness/en/guide/quickstart | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-4 | DeepSeek API pricing | https://api-docs.deepseek.com/quick_start/pricing | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-5 | DeepSeek Harness architecture documentation | https://github.com/deepseek-ai/deepseek-harness/blob/master/docs/architecture.md | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-6 | Cordis meta-framework repository | https://github.com/cordiverse/cordis | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-7 | Cordis paper (A Programming Paradigm for Spatiotemporal Composability) | https://arxiv.org/abs/2608.25512 | Literature | 2026-08-26 | 2026-09-30 | high | — |
| src-agents-deepseek-harness-8 | DeepSeek Harness releases | https://github.com/deepseek-ai/deepseek-harness/releases | Official | 2026-09-29 | 2026-09-30 | high | — |
| src-agents-deepseek-harness-9 | DeepSeek Harness Python SDK guide | https://deepseek-harness.github.io/deepseek-harness/en/guide/python-sdk | Official documentation | — | 2026-09-30 | high | — |
| src-agents-deepseek-harness-10 | DeepSeek Harness Cordis primer | https://deepseek-harness.github.io/deepseek-harness/reference/cordis-primer | Official documentation | — | 2026-09-30 | high | — |