Catalog Catalogs Agent Frameworks & Harnesses
Agent Frameworks & Harnesses
Frameworks, harnesses, IDEs and runtimes that agents are built and run in. For builders choosing an agent stack.
Code-first frameworks, multi-agent orchestration, coding IDEs and harnesses, computer-use and voice agents, sandboxes, identity and auth, MCP gateways and durable execution, compared on language, hosting, licence, protocol support and lifecycle.
238 systems · 10 sections · 43 acquired, archived, stale or shut down · data as of 2026-10-31
Decide
- Build a whole stackOne cited pick per layer for the product you are building, with risk, cost and a stack.yml.
- Choose a frameworkFrameworks, durable execution, tools and auth, no-code builders and sandboxes.
- Check your stackPaste a manifest to find archived, acquired or stale dependencies.
- Do these work together?Documented integrations for every pair in a stack.
Most referenced
Lowest tier first, then by how many other systems in the catalog reference each one.
- Model Context Protocol (MCP spec) T1 Open protocol for LLM-tool I/O
- LangChain (framework) T1 LLM orchestration framework
- Vercel AI SDK T1 TypeScript LLM toolkit
- LlamaIndex (framework) T1 Data framework for LLM apps
- OpenAI Agents SDK T1 OpenAI's official agent framework
- LangGraph (orchestration) T1 Stateful agent graph runtime
- CrewAI T1 Multi-agent orchestration
- Claude Code (Anthropic) T1 Terminal-native agentic coding harness
- Cursor (IDE) T1 Acquired Agentic IDE; Agent Mode + Background Agents (VS Code fork)
- OpenAI Codex CLI T1 Deprecated Terminal-native agentic coding harness (OpenAI)
- AutoGen / AG2 T1 Multi-agent conversation framework
- n8n (AI agent flows) T1 Workflow automation + AI nodes
Sections
- Use-case-specific agent harnesses 86
- Agent frameworks (no first-party memory layer) 47
- Agent IDEs & coding harnesses 32
- Computer-use & desktop agents 13
- Voice agent platforms 13
- AI sandbox & runtime environments 11
- MCP gateways & registries 11
- Multi-agent orchestration platforms 10
- Agent identity & auth 10
- Durable execution & workflow engines 5
Lifecycle
- Active 184
- Maintenance 1
- Renamed 10
- Acquired 17
- Stale 2
- Inactive 2
- Deprecated 9
- Archived 10
- Shut down 3
Tiers: T1 61 · T2 79 · T3 96 · T4 2 · T5 0
Recently changed
- Bolt.new (StackBlitz) — harness Lifecycle: pivoted
- Ghost Beacon Added to the catalog
- UI-TARS Latest release: UI-TARS-desktop / Agent TARS v0.3.1 (2026-10-09); UI-TARS-2 announced 2025-09-04; latest open weights UI-TARS-1.5-7B (2025-04-16)
- Auth0 for AI Agents Added to the catalog
- Cloudflare MCP server portals Added to the catalog
- Cloudflare Workflows Added to the catalog
- Dapr Agents Added to the catalog
- DBOS Added to the catalog
Research
Data and tools
- JSON · CSV, flattened, one row per system, CC-BY-4.0
- MCP tools:
plan_stack,choose_framework_or_store,check_stack,check_compatibility,find_alternatives - CLI:
landscape stack·landscape choose-stack framework·landscape check <manifest> - Data & API · Submit a system