Openharness

Lets AI coding agents discover and reference each other's recent sessions.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "openharness": {
      "command": "npx",
      "args": [
        "-y",
        "openharness"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

OpenHarness

AI 코딩 에이전트의 최근 세션 파일을 찾아 서로 참조하게 해주는 로컬 MCP 서버.

전용 하네스 없이 하네스처럼 동작한다. 기존 도구 환경을 그대로 유지하면서, 에이전트 간 세션을 연결하는 디스커버리 레이어.

Supported Agents (MVP)

Agent	Session Path	Format
Claude Code	`~/.claude/projects/`	JSONL
Codex CLI	`~/.codex/sessions/`	JSONL
Gemini CLI	`~/.gemini/tmp/<hash>/chats/`	JSON

Prerequisites

Each agent must be able to read local files directly.
OpenHarness only provides paths and metadata — it does not transform, relay, or store session content.

Install

Terminal

npm install -g @freebird-ai/openharness
openharness init

This registers OpenHarness as an MCP server in each agent's config.

MCP Tools

`get_agent_sessions`

Returns recent session paths for all agents, filtered by project.

Input:

config.json

{ "project": "/Users/me/my-app" }

Output:

config.json

[
  {
    "agent": "claude-code",
    "path": "/Users/me/.claude/projects/-Users-me-my-app/session.jsonl",
    "format": "jsonl",
    "updatedAt": "2026-03-17T14:32:00Z",
    "matchedProject": "/Users/me/my-app",
    "matchedBy": "directory-name"
  }
]

`get_agent_session`

Returns the recent session path for a specific agent.

Input:

config.json

{ "agent": "claude-code", "project": "/Users/me/my-app" }

Output:

config.json

{
  "agent": "claude-code",
  "path": "/Users/me/.claude/projects/-Users-me-my-app/session.jsonl",
  "format": "jsonl",
  "updatedAt": "2026-03-17T14:32:00Z",
  "matchedProject": "/Users/me/my-app",
  "matchedBy": "directory-name"
}

Returns null if no session is found.

Project Matching

Agent	Strategy
Claude Code	Project path escaped with `-` as directory name
Codex CLI	Workspace field inside session JSONL
Gemini CLI	Project path hash matching `tmp/<hash>/`

How It Works

Code

User → Codex: "Review what Claude Code worked on recently"

Codex → OpenHarness MCP: get_agent_session({ agent: "claude-code", project: "..." })
Codex ← receives session path + metadata
Codex → reads the JSONL file directly and performs review

No rules needed in agent instruction files. MCP tool descriptions are enough for agents to use naturally.

Manual MCP Configuration

If you prefer to configure manually instead of using init:

config.json

{
  "mcpServers": {
    "openharness": {
      "command": "openharness",
      "args": []
    }
  }
}

Add this to your agent's MCP config file:

Agent	Config File
Claude Code	`~/.claude/mcp.json` or project `.mcp.json`
Codex CLI	project `.codex/`
Gemini CLI	`~/.gemini/settings.json`

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Openharness

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "openharness": { "command": "npx", "args": ["-y", "openharness"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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The official MCP server for AllMCPs.com - submit and manage tools directly from your AI. The open directory for MCP servers. Connect Claude, Cursor, Windsurf, and AI agents to databases, tools, files, and APIs. Explore 10,000+ servers. AllMCPs is the premier, open directory for discovering, evaluating, and installing Model Context Protocol (MCP) servers to equip AI agents and LLMs with real-world superpowers.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Openharness →Install in Claude Desktop Install in Cursor Install in VS Code

Openharness

Lets AI coding agents discover and reference each other's recent sessions.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "openharness": {
      "command": "npx",
      "args": [
        "-y",
        "openharness"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

OpenHarness

AI 코딩 에이전트의 최근 세션 파일을 찾아 서로 참조하게 해주는 로컬 MCP 서버.

전용 하네스 없이 하네스처럼 동작한다. 기존 도구 환경을 그대로 유지하면서, 에이전트 간 세션을 연결하는 디스커버리 레이어.

Supported Agents (MVP)

Agent	Session Path	Format
Claude Code	`~/.claude/projects/`	JSONL
Codex CLI	`~/.codex/sessions/`	JSONL
Gemini CLI	`~/.gemini/tmp/<hash>/chats/`	JSON

Prerequisites

Each agent must be able to read local files directly.
OpenHarness only provides paths and metadata — it does not transform, relay, or store session content.

Install

Terminal

npm install -g @freebird-ai/openharness
openharness init

This registers OpenHarness as an MCP server in each agent's config.

MCP Tools

`get_agent_sessions`

Returns recent session paths for all agents, filtered by project.

Input:

config.json

{ "project": "/Users/me/my-app" }

Output:

config.json

[
  {
    "agent": "claude-code",
    "path": "/Users/me/.claude/projects/-Users-me-my-app/session.jsonl",
    "format": "jsonl",
    "updatedAt": "2026-03-17T14:32:00Z",
    "matchedProject": "/Users/me/my-app",
    "matchedBy": "directory-name"
  }
]

`get_agent_session`

Returns the recent session path for a specific agent.

Input:

config.json

{ "agent": "claude-code", "project": "/Users/me/my-app" }

Output:

config.json

{
  "agent": "claude-code",
  "path": "/Users/me/.claude/projects/-Users-me-my-app/session.jsonl",
  "format": "jsonl",
  "updatedAt": "2026-03-17T14:32:00Z",
  "matchedProject": "/Users/me/my-app",
  "matchedBy": "directory-name"
}

Returns null if no session is found.

Project Matching

Agent	Strategy
Claude Code	Project path escaped with `-` as directory name
Codex CLI	Workspace field inside session JSONL
Gemini CLI	Project path hash matching `tmp/<hash>/`

How It Works

Code

User → Codex: "Review what Claude Code worked on recently"

Codex → OpenHarness MCP: get_agent_session({ agent: "claude-code", project: "..." })
Codex ← receives session path + metadata
Codex → reads the JSONL file directly and performs review

No rules needed in agent instruction files. MCP tool descriptions are enough for agents to use naturally.

Manual MCP Configuration

If you prefer to configure manually instead of using init:

config.json

{
  "mcpServers": {
    "openharness": {
      "command": "openharness",
      "args": []
    }
  }
}

Add this to your agent's MCP config file:

Agent	Config File
Claude Code	`~/.claude/mcp.json` or project `.mcp.json`
Codex CLI	project `.codex/`
Gemini CLI	`~/.gemini/settings.json`

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Openharness

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "openharness": { "command": "npx", "args": ["-y", "openharness"] } }

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/openharness?style=directory)](https://allmcps.com/mcp/openharness)

HTML Embed

<a href="https://allmcps.com/mcp/openharness"><img src="https://allmcps.com/api/badge/openharness?style=directory" alt="Openharness on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

★ Featured

AllMCPs Server

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Openharness →Install in Claude Desktop Install in Cursor Install in VS Code