# Awesome Agent Harness 🛠️ [](https://awesome.re) []() [](#citation) []() []() A curated list of pioneering research papers, tools, and resources on the **Agent Harness** — the systematic execution layer that transforms raw model capability into sustained, long-horizon autonomy. []() [](https://www.researchgate.net/profile/Zhongwei-Xie-3/publication/404675561_A_Survey_on_AI_Agent_Harness/links/69fedeb3e93d461915959bed/A-Survey-on-AI-Agent-Harness.pdf) ***A Survey on AI Agent Harness*** > **Agent = Model (Stochastic Intelligence) + Harness (Deterministic Infrastructure)** The survey proposes a **Unified Architectural Taxonomy** that organizes the Agent Harness as a four-layered stack: - **Layer 1: Execution & Orchestration** — The temporal engine driving the autonomous execution loop, model routing, and multi-agent composition. - **Layer 2: Context & Trajectory Management** — The epistemic layer governing state compaction, trajectory persistence, memory hierarchies, and observability. - **Layer 3: Interaction Surface & Execution Environment** — The sensory and actuation organs connecting the agent to the world via tool calling, standardized protocols, and sandboxed execution. - **Layer 4: Constraints & Guardrails** — The independent observer enforcing deterministic laws through access control, permission management, and defense against agent injection. The figure below illustrates the **asymmetric co-evolution** between model capability and harness responsibility:  We aim to provide a comprehensive overview for researchers, developers, and infrastructure engineers interested in this rapidly advancing field. --- ## Contents - [Agent Harness Foundations](#agent-harness-foundations) - [Model & Agent Routing](#model--agent-routing) - [Multi-Agent Composition & Orchestration](#multi-agent-composition--orchestration) - [Autonomous Loop, Resilience & Human-in-the-Loop](#autonomous-loop-resilience--human-in-the-loop) - [Memory Systems](#memory-systems) - [Context Compression](#context-compression) - [Trajectory Persistence & Observability](#trajectory-persistence--observability) - [Self-Evolving Architectures](#self-evolving-architectures) - [Agentic Skills](#agentic-skills) - [Skills Security](#skills-security) - [Standardized Protocols & Interaction Surface](#standardized-protocols--interaction-surface) - [Tool Use & Code Execution](#tool-use--code-execution) - [Sandboxing & Execution Environments](#sandboxing--execution-environments) - [Governance Boundaries](#governance-boundaries) - [Agent Injection & Defense](#agent-injection--defense) --- ## Agent Harness Foundations Cross-layer conceptual works that define and motivate the Agent Harness as a first-class research object.
| Title | Author | Year | Description |
|---|---|---|---|
| Effective harnesses for long-running agents | Young et al. | 2025 | long-running agent harness management |
| Natural-Language Agent Harnesses | Pan et al. | 2026 | natural-language harness design |
| Harness Engineering for Language Agents: The Harness Layer as Control, Agency, and Runtime | He et al. | 2026 | harness as control, agency, and runtime layer |
| Building AI Coding Agents for the Terminal: Scaffolding, Harness, Context Engineering, and Lessons Learned | Bui et al. | 2026 | terminal coding agent scaffolding, context engineering, lessons learned |
| Harness engineering: leveraging Codex in an agent-first world | Lopopolo et al. | 2026 | Codex-based harness engineering |
| The importance of Agent Harness in 2026 | Schmid et al. | 2026 | agent harness importance analysis |
| What is an agent harness in the context of large-language models? | Parallel Web Systems et al. | 2025 | agent harness concept overview |
| Meta-Harness: End-to-End Optimization of Model Harnesses | Lee et al. | 2026 | end-to-end automated optimization of harness code |
| Title | Author | Year | Description |
|---|---|---|---|
| Claude Code Subagents | Anthropic | 2025 | custom AI subagent spawning |
| Compass: Enhancing agent long-horizon reasoning with evolving context | Wan et al. | 2025 | evolving context for long-horizon reasoning |
| Kimi K2. 5: Visual Agentic Intelligence | Team et al. | 2026 | visual agentic intelligence |
| Swarm: An educational framework exploring ergonomic, lightweight multi-agent orchestration | OpenAI et al. | 2024 | lightweight multi-agent orchestration |
| CrewAI: Framework for orchestrating role-playing autonomous AI agents | Moura et al. | 2025 | role-playing agent orchestration |
| A Declarative Language for Building And Orchestrating LLM-Powered Agent Workflows | Daunis et al. | 2025 | declarative agent workflow language |
| Orchestral AI: A Framework for Agent Orchestration | Roman et al. | 2026 | general-purpose agent orchestration |
| Title | Author | Year | Description |
|---|---|---|---|
| Reducing Cost of LLM Agents with Trajectory Reduction | Xiao et al. | 2025 | trajectory reduction for efficiency |
| Semantic Checkpointing for Stateless LLM Agents in Multi-Tenant Enterprise Systems | Roshan et al. | 2025 | semantic checkpointing for stateless agents |
| Large-scale Evaluation of Notebook Checkpointing with AI Agents | Fang et al. | 2025 | notebook checkpointing evaluation |
| AgentTrace: A Structured Logging Framework for Agent System Observability | AlSayyad et al. | 2026 | structured logging for observability |
| AgentSight: System-Level Observability for AI Agents Using eBPF | Zheng et al. | 2025 | eBPF-based system-level observability |
| Durable Execution in LangGraph | LangChain et al. | 2026 | fault-tolerant durable execution |
| Title | Author | Year | Description |
|---|---|---|---|
| Agent Skills Enable a New Class of Realistic and Trivially Simple Prompt Injections | Schmotz et al. | 2025 | skill-based prompt injection analysis |
| Agent Skills in the Wild: An Empirical Study of Security Vulnerabilities at Scale | Liu et al. | 2026 | skill security vulnerabilities at scale |
| Malicious Agent Skills in the Wild: A Large-Scale Security Empirical Study | Liu et al. | 2026 | malicious skill detection study |
| When Skills Lie: Hidden-Comment Injection in LLM Agents | Wang et al. | 2026 | hidden-comment skill injection |
| Zombie Agents: Persistent Control of Self-Evolving LLM Agents via Self-Reinforcing Injections | Yang et al. | 2026 | persistent control via self-reinforcing injection |
| Title | Author | Year | Description |
|---|---|---|---|
| WebOperator: Action-Aware Tree Search for Autonomous Agents in Web Environment | Dihan et al. | 2025 | action-aware web tree search |
| Terminal-bench: Benchmarking agents on hard, realistic tasks in command line interfaces | Merrill et al. | 2026 | CLI task benchmarking |
| Budget-Constrained Agentic Large Language Models: Intention-Based Planning for Costly Tool Use | Liu et al. | 2026 | budget-constrained tool planning |
| Toolsandbox: A stateful, conversational, interactive evaluation benchmark for llm tool use capabilities | Lu et al. | 2025 | stateful tool-use evaluation |
| Title | Author | Year | Description |
|---|---|---|---|
| POLARIS: Typed Planning and Governed Execution for Agentic AI in Back-Office Automation | Moslemi et al. | 2026 | typed planning and governed execution |
| ContextCov: Deriving and Enforcing Executable Constraints from Agent Instruction Files | Sharma et al. | 2026 | executable constraint enforcement |
| Sandbox-runtime: A lightweight sandboxing tool for enforcing filesystem and network restrictions on arbitrary processes at the OS level, without requiring a container | Anthropic et al. | 2026 | OS-level filesystem/network sandboxing |
| Securing AI Agent Execution | Buhler et al. | 2025 | agent execution security analysis |
| BashArena: A Control Setting for Highly Privileged AI Agents | Kaufman et al. | 2025 | highly-privileged agent control setting |
| Breaking the Protocol: Security Analysis of the Model Context Protocol Specification and Prompt Injection Vulnerabilities in Tool-Integrated LLM Agents | Maloyan et al. | 2026 | MCP specification security analysis |