hark

v0.1.0

Hark shared project memory for ChatGPT, Codex, dots, Grok Build and Grok Bot: the Hark MCP connector plus skills that read the project brief at the start of a session, keep work inside its accepted decisions, and write the handoff when you stop.

CodexClaude CodeAgent Plugins3 Skills1 MCP serverStreamable HTTP

By Hark StudioLicense: MIT0 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes: Codex, Claude Code, and Agent Plugins
Parsed components: 4 skill or MCP entries
Source updated: Oct 5, 2026
Manifest status: Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install hark for Codex and Claude Code

Installs for the current user

codex plugin marketplace add Hark-Studio/hark-plugin
codex plugin marketplace upgrade hark
codex plugin add hark@hark

Paste and run these commands in a terminal with Codex. They add and refresh the hark catalog, then install this plugin.

Compatibility: the page URL and API slug “hark” remain stable.

Codex: hark@agent-plugin-marketplace → hark@hark

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually

$ git clone https://github.com/Hark-Studio/hark-plugin

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

hark/

├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── plugin.json
├── skills/hark-bot-notes/SKILL.md
├── skills/hark-handoff/SKILL.md
├── skills/hark-session/SKILL.md
└── .mcp.json

Included Skills3

hark-bot-notesskills/hark-bot-notes/SKILL.md

Rules for always-on and scheduled agents (dots, Grok Bot routines, background runs) that read or note things in Hark without a person in the loop. Use when the Hark MCP tools are available and the run is unattended, recurring, or a routine. Each run is one short Hark session; read first, write little, and never leave the session open.

hark-handoffskills/hark-handoff/SKILL.md

Write the Hark handoff that ends a session, so the next session, agent or teammate picks up without re-deriving anything. Use when work on a Hark project is finishing, the user says hand off / wrap up / write the handoff, a brief shows an unconfirmed draft handoff, or a session stopped without end_session.

hark-sessionskills/hark-session/SKILL.md

Hark's session flow for any work on a Hark project. Use when the Hark MCP tools are available and the work concerns a project (a V-### code, a brief, decisions, next steps, a handoff), or when a repo holds a .hark/project file. Read the brief with get_agent_brief before doing anything, work inside the accepted decisions, log as you go, and call end_session (or close_session) before you stop.

MCP servers1

harkStreamable HTTP

url: https://harkstudio.io/mcp

Plugin manifests3

.codex-plugin/plugin.json

{
  "name": "hark",
  "version": "0.1.0",
  "description": "Hark shared project memory for ChatGPT, Codex, dots, Grok Build and Grok Bot: the Hark MCP connector plus skills that read the project brief at the start of a session, keep work inside its accepted decisions, and write the handoff when you stop.",
  "author": {
    "name": "Hark Studio",
    "email": "[email protected]",
    "url": "https://harkstudio.io"
  },
  "homepage": "https://harkstudio.io/how-it-works/connect",
  "repository": "https://github.com/Hark-Studio/hark-plugin",
  "license": "MIT",
  "keywords": [
    "hark",
    "harkstudio",
    "hark project memory",
    "hark handoff",
    "hark brief"
  ],
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "interface": {
    "displayName": "Hark",
    "shortDescription": "Shared project memory",
    "longDescription": "Hark is the home base for every idea you are building: one memory that your agents, teammates and clients all read from and write to, so an idea moves from spark to shipped without the plan living in one person's chat history.\n\nThis plugin connects ChatGPT, Codex and dots to your Hark projects through the Hark MCP connector, and teaches the agent Hark's session flow:\n- Start every piece of work by reading the project's brief (current state, accepted decisions, non-goals, blockers, next action) with get_agent_brief.\n- Work inside the project's conventions, and log decisions, shipped work and failed attempts as they happen.\n- End with a handoff (end_session) that the next session, agent or teammate picks up from, or close the session when nothing changed.\n- For always-on agents such as dots: one short session per run, read first, write little, and never leave a session open.\n\nWhat it needs: a Hark account (free 14-day trial, no card) and, in a repo, a .hark/project file holding the project's code (for example V-012). Sign in happens in the browser through OAuth on first use. Agents proposing decisions or state changes create candidates that a person accepts in Hark.\n\nLimits: the plugin ships no code and no hooks, so nothing runs on your machine; the client's own confirmation rules apply to writes. Claude Code users should install the Hark mod (Hark-Studio/hark-mod) instead, which adds a brief on start, an edit guard and a handoff on stop inside Claude Code.",
    "developerName": "Hark Studio",
    "category": "Productivity",
    "capabilities": [
      "Read a project's brief: current state, accepted decisions, non-goals, blockers and next action",
      "Log decisions, shipped work and failed attempts to the project's journal",
      "Write the session handoff the next session or teammate picks up from",
      "Capture sparks, feedback and metrics against a project",
      "Search and digest projects across a workspace"
    ],
    "websiteURL": "https://harkstudio.io",
    "supportURL": "https://harkstudio.io/support",
    "privacyPolicyURL": "https://harkstudio.io/privacy",
    "termsOfServiceURL": "https://harkstudio.io/terms",
    "defaultPrompt": [
      "Read the Hark brief for V-012 and tell me what's next.",
      "Log this as a decision in Hark, with the rationale we just discussed.",
      "Write the Hark handoff for what we did in this session."
    ],
    "logo": "./assets/logo.png",
    "composerIcon": "./assets/icon.png"
  }
}

.claude-plugin/plugin.json

{
  "name": "hark",
  "version": "0.1.0",
  "description": "Hark shared project memory for ChatGPT, Codex, dots, Grok Build and Grok Bot: the Hark MCP connector plus skills that read the project brief at the start of a session, keep work inside its accepted decisions, and write the handoff when you stop.",
  "author": {
    "name": "Hark Studio",
    "email": "[email protected]",
    "url": "https://harkstudio.io"
  },
  "homepage": "https://harkstudio.io/how-it-works/connect",
  "repository": "https://github.com/Hark-Studio/hark-plugin",
  "license": "MIT",
  "keywords": [
    "hark",
    "harkstudio",
    "hark project memory",
    "hark handoff",
    "hark brief"
  ],
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "icon": "./assets/icon.png"
}

plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "hark",
  "version": "0.1.0",
  "description": "Hark shared project memory for ChatGPT, Codex, dots, Grok Build and Grok Bot: the Hark MCP connector plus skills that read the project brief at the start of a session, keep work inside its accepted decisions, and write the handoff when you stop.",
  "author": {
    "name": "Hark Studio",
    "email": "[email protected]",
    "url": "https://harkstudio.io"
  },
  "homepage": "https://harkstudio.io/how-it-works/connect",
  "repository": "https://github.com/Hark-Studio/hark-plugin",
  "license": "MIT",
  "keywords": [
    "hark",
    "harkstudio",
    "hark project memory",
    "hark handoff",
    "hark brief"
  ],
  "extensions": {
    "com.openai": {
      "interface": {
        "displayName": "Hark",
        "shortDescription": "Shared project memory",
        "longDescription": "Hark is the home base for every idea you are building: one memory that your agents, teammates and clients all read from and write to, so an idea moves from spark to shipped without the plan living in one person's chat history.\n\nThis plugin connects ChatGPT, Codex and dots to your Hark projects through the Hark MCP connector, and teaches the agent Hark's session flow:\n- Start every piece of work by reading the project's brief (current state, accepted decisions, non-goals, blockers, next action) with get_agent_brief.\n- Work inside the project's conventions, and log decisions, shipped work and failed attempts as they happen.\n- End with a handoff (end_session) that the next session, agent or teammate picks up from, or close the session when nothing changed.\n- For always-on agents such as dots: one short session per run, read first, write little, and never leave a session open.\n\nWhat it needs: a Hark account (free 14-day trial, no card) and, in a repo, a .hark/project file holding the project's code (for example V-012). Sign in happens in the browser through OAuth on first use. Agents proposing decisions or state changes create candidates that a person accepts in Hark.\n\nLimits: the plugin ships no code and no hooks, so nothing runs on your machine; the client's own confirmation rules apply to writes. Claude Code users should install the Hark mod (Hark-Studio/hark-mod) instead, which adds a brief on start, an edit guard and a handoff on stop inside Claude Code.",
        "developerName": "Hark Studio",
        "category": "Productivity",
        "capabilities": [
          "Read a project's brief: current state, accepted decisions, non-goals, blockers and next action",
          "Log decisions, shipped work and failed attempts to the project's journal",
          "Write the session handoff the next session or teammate picks up from",
          "Capture sparks, feedback and metrics against a project",
          "Search and digest projects across a workspace"
        ],
        "websiteURL": "https://harkstudio.io",
        "supportURL": "https://harkstudio.io/support",
        "privacyPolicyURL": "https://harkstudio.io/privacy",
        "termsOfServiceURL": "https://harkstudio.io/terms",
        "defaultPrompt": [
          "Read the Hark brief for V-012 and tell me what's next.",
          "Log this as a decision in Hark, with the rationale we just discussed.",
          "Write the Hark handoff for what we did in this session."
        ],
        "logo": "./assets/logo.png",
        "composerIcon": "./assets/icon.png"
      }
    }
  }
}

Browse the “hark” tag →

hark-memory

by Hark Studio

Brings your Hark project brief into every session, keeps the plan through compaction, checks edits against accepted decisions, and writes the handoff when you stop.

Claude Code

0Updated 2 weeks ago

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[hark on Agent Plugins Marketplace](https://pluginsmp.com/plugins/hark)