Agent tool timeline

50 releases30 organizations

Entries by year

Release history

Organizations
About harnesses

50 entries

2026

Sustained work and collaboration7 entries

Cowork and chat merge into one Claude experience for documents and ongoing tasks.

Product launchClosed sourceGeneral agents
Source

DeepSeek Harness

DeepSeekMilestone

Plugins compose models, tools, sessions, sandboxes and execution loops, with a recorded task trajectory.

PreviewOpen sourceHarnesses
Source

WorkBuddy

Tencent

A desktop workspace agent handles files, content and coding tasks with tools and extensible skills.

Product launchClosed sourceGeneral agents
Source

Hermes Agent

Nous ResearchMilestone

A persistent agent combines memory, reusable skills and tools to carry out tasks locally or on a server.

ReleaseOpen sourceGeneral agents
Source

Codex app

OpenAI

A desktop app organizes parallel coding agents and code review.

Product launchClosed sourceCoding agents
Source

OpenClaw

OpenClawMilestone

The personal-agent project adopts the OpenClaw name across messaging and local tools.

AnnouncementOpen sourceGeneral agents
Source

Claude Cowork

AnthropicMilestone

Claude Code-style execution expands to files, documents, and office work.

PreviewClosed sourceGeneral agents
Source

2025

Tools and runtime infrastructure30 entries

Handles software tasks asynchronously in isolated environments, retaining context from project history and review.

PreviewClosed sourceCoding agents
Source

Pi coding agent

Mario ZechnerMilestone

A minimal coding harness emphasizes tools, context control, and session management.

AnnouncementOpen sourceHarnesses
Source

Google Antigravity

GoogleMilestone

Agents work across the editor, terminal and browser, presenting artifacts that document progress and verification.

PreviewClosed sourceCoding agents
Source

Kiro reaches general availability and introduces a CLI for specification-driven development in the terminal.

ReleaseClosed sourceCoding agents
Source

OpenCode 1.0

AnomalyMilestone

An open-source coding agent connects to different models to read files, edit code and use project tools.

ReleaseOpen sourceCoding agents
Source

Kimi CLI

Moonshot AI

A publicly released terminal coding agent connecting shell commands, project files and MCP tools.

ReleaseOpen sourceCoding agents
Source

Organizes agents around roles, tasks and flows as its open-source core reaches general availability.

ReleaseOpen sourceFrameworks & protocols
Source

Agent Skills

Anthropic

Instructions, scripts, and resources package reusable, on-demand agent expertise.

ReleaseOpen sourceFrameworks & protocols
Source

Handles research, analysis, presentations and website development, including full-stack web applications.

ReleaseClosed sourceGeneral agents
Source

Claude Agent SDK

AnthropicMilestone

Claude Code SDK becomes Claude Agent SDK, expanding its focus to general-purpose agents.

ReleaseOpen sourceHarnesses
Source

Qoder

Alibaba

Plans and executes development tasks with repository context; Quest mode supports longer delegated work.

PreviewClosed sourceCoding agents
Source

Deep Agents

LangChainMilestone

A reusable harness combines planning, a filesystem, and subagents for longer tasks.

ReleaseOpen sourceHarnesses
Source

Qwen Code

Alibaba

An open-source command-line coding agent released alongside Qwen3-Coder for repository work and task execution.

ReleaseOpen sourceCoding agents
Source

ChatGPT agent

OpenAIMilestone

Research and action come together through a virtual computer, browser, and terminal.

Product launchClosed sourceGeneral agents
Source

TRAE SOLO

ByteDance

Connects requirements, coding, browser validation and deployment within one development task.

ReleaseClosed sourceCoding agents
Source

Kiro

AmazonMilestone

An IDE organizes requirements, design and task lists before agents edit code, with event-triggered automation.

PreviewClosed sourceCoding agents
Source

Gemini CLI

GoogleMilestone

Google releases an open-source terminal agent for coding, troubleshooting, and tools.

ReleaseOpen sourceCoding agents
Source

Expands the terminal into an agent development environment for managing tasks, code changes and commands.

ReleaseOpen sourceCoding agents
Source

Jules

GoogleMilestone

An asynchronous agent reads repositories, edits code and runs tests in a cloud VM, then presents changes for review.

PreviewClosed sourceCoding agents
Source

Codex Cloud

OpenAIMilestone

Cloud sandboxes support parallel engineering tasks and reviewable code changes.

PreviewClosed sourceCoding agents
Source

Define an agent with a model, instructions and tools, letting the model choose the next steps.

ReleaseOpen sourceFrameworks & protocols
Source

Codex CLI

OpenAIMilestone

An open-source terminal coding agent works directly with local code and tools.

ReleaseOpen sourceCoding agents
Source

Tools for building, orchestrating, evaluating and deploying agents, including multi-agent applications.

ReleaseOpen sourceFrameworks & protocols
Source

An open protocol supports agent discovery, task delegation and status updates across vendors.

AnnouncementOpen sourceFrameworks & protocols
Source

OpenAI Agents SDK

OpenAIMilestone

Agent orchestration adds handoffs, guardrails, and tracing around model and tool calls.

ReleaseOpen sourceFrameworks & protocols
Source

Claude Code

AnthropicMilestone

A terminal agent reads code, edits files, runs tests, and uses command-line tools.

PreviewClosed sourceCoding agents
Source

ChatGPT deep research

OpenAIMilestone

Multi-step web research analyzes sources and produces cited reports.

Product launchClosed sourceGeneral agents
Source

Goose

BlockMilestone

A local desktop and command-line agent carries out tasks through connected tools and extensions.

ReleaseOpen sourceGeneral agents
Source

Operator

OpenAI

A research preview carries out tasks through a browser interface.

PreviewClosed sourceGeneral agents
Source

2024

Developer tools and execution environments10 entries

smolagents

Hugging FaceMilestone

Models express actions as code and use tools and execution environments to complete multi-step tasks.

ReleaseOpen sourceFrameworks & protocols
Source

Model Context Protocol

AnthropicMilestone

An open protocol standardizes connections between models, data, and tools.

ReleaseOpen sourceFrameworks & protocols
Source

Cursor Agent

AnysphereMilestone

Composer gains an early agent that retrieves context and uses the terminal.

PreviewClosed sourceCoding agents
Source

Windsurf / Cascade

WindsurfMilestone

An agentic editor combines project context with multi-step code changes.

Product launchClosed sourceCoding agents
Source

Claude Dev becomes Cline, with streamed edits, mid-task feedback and broader model support.

ReleaseOpen sourceCoding agents
Source

Natural-language app building combines setup, coding, and execution.

AnnouncementClosed sourceCoding agents
Source

OpenHands / OpenDevin

OpenHandsMilestone

An execution platform connects coding agents to files, terminals, and browsers.

Research paperOpen sourceHarnesses
Source

SWE-agent

SWE-agent team

A purpose-built computer interface lets agents navigate code, edit files, and run tests.

Research paperOpen sourceHarnesses
Source

Devin

CognitionMilestone

A sandboxed agent plans engineering tasks using an editor, terminal, and browser.

PreviewClosed sourceCoding agents
Source

LangGraph

LangChainMilestone

Stateful graphs and cycles organize controllable agent execution.

AnnouncementOpen sourceHarnesses
Source

2023

Early autonomy and collaboration3 entries

AutoGen

MicrosoftMilestone

Orchestrate workflows through conversations between models, tools, and people.

AnnouncementOpen sourceFrameworks & protocols
Source

Aider

AiderMilestone

Terminal-based code editing uses a repository map to give the model context across files.

AnnouncementOpen sourceCoding agents
Source

Auto-GPT 0.2

Significant GravitasMilestone

An early autonomous agent uses repeated model calls and tools, adding Selenium-based web browsing in this release.

ReleaseOpen sourceGeneral agents
Source

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