# DeerFlow Evaluation — Autonomous Research Orchestration Layer

**Status:** No-go for full adoption · Selective borrowing recommended
**Date:** 2026-03-23
**Issue:** #1283 (spawned from #1275 screenshot triage)
**Refs:** #972 (Timmy research pipeline) · #975 (ResearchOrchestrator)

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## What Is DeerFlow?

DeerFlow (`bytedance/deer-flow`) is an open-source "super-agent harness" built by ByteDance on top of LangGraph. It provides a production-grade multi-agent research and code-execution framework with a web UI, REST API, Docker deployment, and optional IM channel integration (Telegram, Slack, Feishu/Lark).

- **Stars:** ~39,600 · **License:** MIT
- **Stack:** Python 3.12+ (backend) · TypeScript/Next.js (frontend) · LangGraph runtime
- **Entry point:** `http://localhost:2026` (Nginx reverse proxy, configurable via `PORT`)

---

## Research Questions — Answers

### 1. Agent Roles

DeerFlow uses a two-tier architecture:

| Role | Description |
|------|-------------|
| **Lead Agent** | Entry point; decomposes tasks, dispatches sub-agents, synthesizes results |
| **Sub-Agent (general-purpose)** | All tools except `task`; spawned dynamically |
| **Sub-Agent (bash)** | Command-execution specialist |

The lead agent runs through a 12-middleware chain in order: thread setup → uploads → sandbox → tool-call repair → guardrails → summarization → todo tracking → title generation → memory update → image injection → sub-agent concurrency cap → clarification intercept.

**Concurrency:** up to 3 sub-agents in parallel (configurable), 15-minute default timeout each, structured SSE event stream (`task_started` / `task_running` / `task_completed` / `task_failed`).

**Mapping to Timmy personas:** DeerFlow's lead/sub-agent split roughly maps to Timmy's orchestrator + specialist-agent pattern. DeerFlow doesn't have named personas — it routes by capability (tools available to the agent type), not by identity. Timmy's persona system is richer and more opinionated.

---

### 2. API Surface

DeerFlow exposes a full REST API at port 2026 (via Nginx). **No authentication by default.**

**Core integration endpoints:**

| Endpoint | Method | Purpose |
|----------|--------|---------|
| `POST /api/langgraph/threads` | | Create conversation thread |
| `POST /api/langgraph/threads/{id}/runs` | | Submit task (blocking) |
| `POST /api/langgraph/threads/{id}/runs/stream` | | Submit task (streaming SSE/WS) |
| `GET /api/langgraph/threads/{id}/state` | | Get full thread state + artifacts |
| `GET /api/models` | | List configured models |
| `GET /api/threads/{id}/artifacts/{path}` | | Download generated artifacts |
| `DELETE /api/threads/{id}` | | Clean up thread data |

These are callable from Timmy with `httpx` — no special client library needed.

---

### 3. LLM Backend Support

DeerFlow uses LangChain model classes declared in `config.yaml`.

**Documented providers:** OpenAI, Anthropic, Google Gemini, DeepSeek, Doubao (ByteDance), Kimi/Moonshot, OpenRouter, MiniMax, Novita AI, Claude Code (OAuth).

**Ollama:** Not in official documentation, but works via the `langchain_openai:ChatOpenAI` class with `base_url: http://localhost:11434/v1` and a dummy API key. Community-confirmed (GitHub issues #37, #1004) with Qwen2.5, Llama 3.1, and DeepSeek-R1.

**vLLM:** Not documented, but architecturally identical — vLLM exposes an OpenAI-compatible endpoint. Should work with the same `base_url` override.

**Practical caveat:** The lead agent requires strong instruction-following for consistent tool use and structured output. Community findings suggest ≥14B parameter models (Qwen2.5-14B minimum) for reliable orchestration. Our current `qwen3:14b` should be viable.

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### 4. License

**MIT License** — Copyright 2025 ByteDance Ltd. and DeerFlow Authors 2025–2026.

Permissive: use, modify, distribute, commercialize freely. Attribution required. No warranty.

**Compatible with Timmy's use case.** No CLA, no copyleft, no commercial restrictions.

---

### 5. Docker Port Conflicts

DeerFlow's Docker Compose exposes a single host port:

| Service | Host Port | Notes |
|---------|-----------|-------|
| Nginx (entry point) | **2026** (configurable via `PORT`) | Only externally exposed port |
| Frontend (Next.js) | 3000 | Internal only |
| Gateway API | 8001 | Internal only |
| LangGraph runtime | 2024 | Internal only |
| Provisioner (optional) | 8002 | Internal only, Kubernetes mode only |

Timmy's existing Docker Compose exposes:
- **8000** — dashboard (FastAPI)
- **8080** — openfang (via `openfang` profile)
- **11434** — Ollama (host process, not containerized)

**No conflict.** Port 2026 is not used by Timmy. DeerFlow can run alongside the existing stack without modification.

---

## Full Capability Comparison

| Capability | DeerFlow | Timmy (`research.py`) |
|------------|----------|-----------------------|
| Multi-agent fan-out | ✅ 3 concurrent sub-agents | ❌ Sequential only |
| Web search | ✅ Tavily / InfoQuest | ✅ `research_tools.py` |
| Web fetch | ✅ Jina AI / Firecrawl | ✅ trafilatura |
| Code execution (sandbox) | ✅ Local / Docker / K8s | ❌ Not implemented |
| Artifact generation | ✅ HTML, Markdown, slides | ❌ Markdown report only |
| Document upload + conversion | ✅ PDF, PPT, Excel, Word | ❌ Not implemented |
| Long-term memory | ✅ LLM-extracted facts, persistent | ✅ SQLite semantic cache |
| Streaming results | ✅ SSE + WebSocket | ❌ Blocking call |
| Web UI | ✅ Next.js included | ✅ Jinja2/HTMX dashboard |
| IM integration | ✅ Telegram, Slack, Feishu | ✅ Telegram, Discord |
| Ollama backend | ✅ (via config, community-confirmed) | ✅ Native |
| Persona system | ❌ Role-based only | ✅ Named personas |
| Semantic cache tier | ❌ Not implemented | ✅ SQLite (Tier 4) |
| Free-tier cascade | ❌ Not applicable | 🔲 Planned (Groq, #980) |
| Python version requirement | 3.12+ | 3.11+ |
| Lock-in | LangGraph + LangChain | None |

---

## Integration Options Assessment

### Option A — Full Adoption (replace `research.py`)
**Verdict: Not recommended.**

DeerFlow is a substantial full-stack system (Python + Node.js, Docker, Nginx, LangGraph). Adopting it fully would:
- Replace Timmy's custom cascade tier system (SQLite cache → Ollama → Claude API → Groq) with a single-tier LangChain model config
- Lose Timmy's persona-aware research routing
- Add Python 3.12+ dependency (Timmy currently targets 3.11+)
- Introduce LangGraph/LangChain lock-in for all research tasks
- Require running a parallel Node.js frontend process (redundant given Timmy's own UI)

### Option B — Sidecar for Heavy Research (call DeerFlow's API from Timmy)
**Verdict: Viable but over-engineered for current needs.**

DeerFlow could run as an optional sidecar (`docker compose --profile deerflow up`) and Timmy could delegate multi-agent research tasks via `POST /api/langgraph/threads/{id}/runs`. This would unlock parallel sub-agent fan-out and code-execution sandboxing without replacing Timmy's stack.

The integration would be ~50 lines of `httpx` code in a new `DeerFlowClient` adapter. The `ResearchOrchestrator` in `research.py` could route tasks above a complexity threshold to DeerFlow.

**Barrier:** DeerFlow's lack of default authentication means the sidecar would need to be network-isolated (internal Docker network only) or firewalled. Also, DeerFlow's Ollama integration is community-maintained, not officially supported — risk of breaking on upstream updates.

### Option C — Selective Borrowing (copy patterns, not code)
**Verdict: Recommended.**

DeerFlow's architecture reveals concrete gaps in Timmy's current pipeline that are worth addressing independently:

| DeerFlow Pattern | Timmy Gap to Close | Implementation Path |
|------------------|--------------------|---------------------|
| Parallel sub-agent fan-out | Research is sequential | Add `asyncio.gather()` to `ResearchOrchestrator` for concurrent query execution |
| `SummarizationMiddleware` | Long contexts blow token budget | Add a context-trimming step in the synthesis cascade |
| `TodoListMiddleware` | No progress tracking during long research | Wire into the dashboard task panel |
| Artifact storage + serving | Reports are ephemeral (not persistently downloadable) | Add file-based artifact store to `research.py` (issue #976 already planned) |
| Skill modules (Markdown-based) | Research templates are `.md` files — same pattern | Already done in `skills/research/` |
| MCP integration | Research tools are hard-coded | Add MCP server discovery to `research_tools.py` for pluggable tool backends |

---

## Recommendation

**No-go for full adoption or sidecar deployment at this stage.**

Timmy's `ResearchOrchestrator` already covers the core pipeline (query → search → fetch → synthesize → store). DeerFlow's value proposition is primarily the parallel sub-agent fan-out and code-execution sandbox — capabilities that are useful but not blocking Timmy's current roadmap.

**Recommended actions:**

1. **Close the parallelism gap (high value, low effort):** Refactor `ResearchOrchestrator` to execute queries concurrently with `asyncio.gather()`. This delivers DeerFlow's most impactful capability without any new dependencies.

2. **Re-evaluate after #980 and #981 are done:** Once Timmy has the Groq free-tier cascade and a sovereignty metrics dashboard, we'll have a clearer picture of whether the custom orchestrator is performing well enough to make DeerFlow unnecessary entirely.

3. **File a follow-up for MCP tool integration:** DeerFlow's use of `langchain-mcp-adapters` for pluggable tool backends is the most architecturally interesting pattern. Adding MCP server discovery to `research_tools.py` would give Timmy the same extensibility without LangGraph lock-in.

4. **Revisit DeerFlow's code-execution sandbox if #978 (Paperclip task runner) proves insufficient:** DeerFlow's sandboxed `bash` tool is production-tested and well-isolated. If Timmy's task runner needs secure code execution, DeerFlow's sandbox implementation is worth borrowing or wrapping.

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## Follow-up Issues to File

| Issue | Title | Priority |
|-------|-------|----------|
| New | Parallelize ResearchOrchestrator query execution (`asyncio.gather`) | Medium |
| New | Add context-trimming step to synthesis cascade | Low |
| New | MCP server discovery in `research_tools.py` | Low |
| #976 | Semantic index for research outputs (already planned) | High |
