Clone-ready harnesses and runtimes that put the agent loop under your control

rivet-dev

Lightweight WASM and V8 isolate OS library that runs agents inside your process with millisecond cold starts and direct host bindings.

Use caseUse it to embed Pi or other ACP agents as in-process VMs with granular permissions instead of spinning full sandboxes.

vinhnx

Rust terminal coding agent and harness with sandboxed tools, durable sessions, MCP, skills, and multi-provider support.

Use caseUse it to run long autonomous coding loops from a TUI or headless mode with built-in verification and worktree isolation.

langchain-ai

Batteries-included opinionated agent harness on LangGraph with planning, filesystem tools, sub-agents, and context management.

Use caseUse it to spin up a production-ready long-horizon research or coding agent and override only the pieces you need.

browserbase

SDK for browser agents built on Playwright with natural language actions, self-healing, and multi-language support.

Use caseUse it to give coding or research agents reliable web navigation and extraction without brittle selectors.

ChromeDevTools

Official MCP server exposing full Chrome DevTools for automation, performance traces, network, console, and debugging.

Use caseUse it to let an agent inspect LCP, take heap snapshots, or drive live Chrome sessions during coding tasks.

huggingface

Barebones Python library for code-as-action agents that write and execute Python in sandboxes like E2B.

Use caseUse it to prototype multi-step agents that compose tools via real code rather than JSON tool calls.

pydantic

Typed Python AI SDK and agent framework with structured outputs, multi-model support, and MCP integration.

Use caseUse it to build type-safe agent loops with validated I/O and Logfire observability for production services.

openai

Lightweight provider-agnostic framework for multi-agent workflows with handoffs, guardrails, and tracing.

Use caseUse it to compose specialist agents with structured handoffs and run them against any tool-calling LLM.

getzep

Framework for building temporal knowledge graphs that track changing facts with provenance for agent memory.

Use caseUse it to give agents a real-time context graph that invalidates stale facts and supports hybrid retrieval.

ComposioHQ

Tool layer with 1000+ integrations, auth, search, and sandboxed workbench so agents stop reinventing OAuth.

Use caseUse it to drop authenticated toolkits into any agent harness for Gmail, GitHub, Slack, and more.

deepklarity

Multi-agent orchestration CLI plus task board with TDD-first patterns, RCA, and cost-aware delegation.

Use caseUse it to decompose specs into dependency graphs, route tasks to cheapest capable agents, and keep evidence trails.

speakeasy-api

Coding agent runtime with one compose tool, ACP server, A2A, and subagent orchestration in a static binary.

Use caseUse it as a concise daily-driver harness that reloads skills and MCP dynamically and hosts other agents over ACP.

agno-agi

Framework and AgentOS runtime for building, serving, and managing agent platforms with UI control plane.

Use caseUse it to own your full agent stack including sessions, memory, traces, and MCP in your own cloud.

letta-ai

Memory-first stateful coding agent that persists identity and long-term memory across sessions and models.

Use caseUse it to run coding agents that learn from experience and retain context without prompt stuffing.

e2b-dev

Open-source virtual desktop sandbox for computer-use agents with graphical environment and streaming.

Use caseUse it to give agents a full isolated desktop for GUI automation and secure code execution.

mcp-use

TypeScript framework for building MCP servers and apps rebuilt for the stateless 2026 MCP spec.

Use caseUse it to ship high-throughput MCP servers with inspector, HMR views, and headless screenshot debugging for agents.

standardagents

Dev agent multiplexer that creates git worktrees and tmux panes for parallel coding agents.

Use caseUse it to launch isolated agent sessions per task then merge or PR the results from a single board.

SUNRNEHUI

Plan-native execution harness adding intent-to-contract synthesis, durable handoff, and evidence-based acceptance.

Use caseUse it to add portable contracts and audit gates across Codex, Claude Code, or other file-and-shell agents.

MervinPraison

Fast multi-agent workforce framework with planning, memory, RAG, dashboards, and multi-provider support.

Use caseUse it to spin up autonomous agent teams with low-latency orchestration for production workflows.

agiresearch

AI Agent Operating System with kernel and SDK for scheduling, context, memory, tools, and computer-use sandboxes.

Use caseUse it to treat agents as first-class OS processes with shared resource management and deployment modes.