Skillget

cortex

agent
SUMMARY

Coordinate a team of AI agents through a shared folder of markdown files

README.md

Cortex

Give your AI agents a chief of staff.

Cortex is an open protocol for coordinating AI agents through plain markdown files. It ships with a Claude Code plugin, but the protocol works with any agent runtime — Codex, Cursor, Gemini CLI, or anything that can read and write files.

A chief of staff agent manages worker agents across projects. The chief of staff receives your instructions, dispatches work to agents, and monitors progress — all through plain markdown with YAML frontmatter.

Not using Claude Code? See the protocol spec and adapter examples for your runtime.

How It Works

You --> Chief of Staff (Claude Code) --> Team Directory (markdown files) <-- Worker Agents (Claude Code)
  • Team directory — a shared folder of markdown files. Agent notes, project notes, and work queues. Can be an Obsidian vault, a git repo, or any directory.
  • Chief of staff — a coordinator agent that receives your instructions, dispatches tasks to workers, and sends daily briefings. Talk to it via Telegram (recommended), terminal, or remote control.
  • Worker agents — project-specific agents that poll for work, execute tasks, and report status.
  • No direct agent-to-agent communication. All coordination happens through the shared markdown files.

Quick Start

1. Install the plugin

From a local clone:

claude plugins marketplace add /path/to/cortex --scope user
claude plugins install cortex@agentweave

From GitHub:

claude plugins marketplace add https://github.com/agentweave/cortex --scope user
claude plugins install cortex@agentweave

The marketplace name (agentweave) comes from .claude-plugin/marketplace.json in the repo. This file is required for the plugin system to discover and install the plugin.

2. Run setup

In your terminal, start Claude Code and run:

/setup-cortex

This creates your team directory, config, and chief of staff agent note. It will ask for:

  • Team directory path (default: ~/cortex-team)
  • Telegram chat ID (optional — for mobile access via the Telegram plugin)
  • Heartbeat interval and daily schedule times

3. Join as chief of staff

In the chief of staff's project directory:

/join-cortex Chief of Staff

This generates .cortex.md (the protocol file), updates CLAUDE.local.md, and automatically starts the heartbeat (polls for work every 15 min). The heartbeat restarts on each session when /join-cortex runs.

4. Register a worker agent

As the chief of staff (or in any session):

/register-agent Billing Dev

Then in the worker's project directory:

/join-cortex Billing Dev

What You Get

When an agent runs /join-cortex, two files are created in the project:

.cortex.md — the full protocol that tells the agent how to operate:

# Cortex Protocol

You are **Billing Dev**, a member of Cortex — a coordinated team of AI agents.

## Your Identity
- Agent note: agents/billing-dev.md in the team directory
- Project: ~/Projects/billing-service
- Team directory: ~/cortex-team

## Protocol
### Checking for Work
- Read your project's ## Work Queue
- Pick up tasks with status "ready"
- Mark "in-progress", do the work, mark "done"

### Heartbeat
- Poll every 15 minutes for new work
...

CLAUDE.local.md — a one-line reference so the agent auto-syncs on session start (untracked, agent-specific):

## Cortex
On session start, run /join-cortex Billing Dev to sync with Cortex. See .cortex.md for full protocol.

How Agents Communicate

Agents never talk to each other directly. All coordination flows through the team directory — a shared folder of markdown files that acts as a message bus.

  • Chief of staff writes tasks to project notes' ## Work Queue sections
  • Workers poll their project's work queue on a heartbeat, pick up ready tasks, and report done
  • Heartbeat timestamps — every agent updates a last-heartbeat field in its agent note on each poll. The chief of staff checks these to detect agents that have gone down (> 30 min stale)
  • Status flows back through agent notes' ## Session Log — the chief of staff reads these to monitor progress

This means agents don't need to run simultaneously. A worker can pick up tasks hours after the chief of staff wrote them.

Housekeeping

The team directory should be a git repo. During the daily review, the chief of staff prunes old data:

  • Done tasks older than 7 days are deleted from work queues
  • Session logs are trimmed to only the latest entry per agent
  • Git preserves history — pruned content lives in git log if you ever need it

Work Queue

Tasks live in project notes under ## Work Queue. The chief of staff writes them, workers execute them.

Status lifecycle: ready → in-progress → done

Example:

## Work Queue

### 2026-03-28T10:00
**Task:** Add Stripe webhook endpoint for payment failures
**Scope:** Create POST /webhooks/stripe, verify signature, handle payment_intent.payment_failed events
**Status:** ready

When a worker picks it up:

**Status:** in-progress

When complete:

**Status:** done
Summary: Implemented POST /webhooks/stripe with signature verification. Handles payment_intent.payment_failed by updating subscription status to past_due. Added tests.

Skills Reference

/setup-cortex

First-time Cortex setup. Creates the team directory structure, writes ~/.cortex/config.yaml, and registers the chief of staff.

/register-agent <name>

Register a new agent. Creates an agent note in <team_dir>/agents/ from the template. Asks for the agent's project path, role, and capabilities.

/join-cortex <name>

Onboard an agent. Reads the agent note from the team directory, generates .cortex.md in the current project with the full protocol, and updates CLAUDE.local.md. Idempotent — safe to re-run as a sync.

For the chief of staff, generates an extended protocol with coordinator duties (dispatch, monitoring, daily briefing/review).

/leave-cortex <name>

Offboard an agent. Removes .cortex.md, cleans CLAUDE.local.md, and sets agent status to inactive in the team directory.

Configuration

~/.cortex/config.yaml:

team_dir: ~/cortex-team
heartbeat_minutes: 15
daily_briefing: "09:00"
daily_review: "18:00"
telegram_chat_id: "your-chat-id"
chief_of_staff_project: "~/Projects/chief-of-staff"

Telegram is handled by the separate Claude Code Telegram plugin. Cortex only needs the telegram_chat_id to know where to send messages. If you skip Telegram, the chief of staff works fine via terminal or remote control.

Team Directory Structure

~/cortex-team/
  agents/
    chief-of-staff.md
    billing-dev.md
    dashboard-dev.md
  projects/
    billing-service.md
    dashboard.md
  templates/
    agent-template.md
    project-template.md

Slug Derivation

Agent names are converted to slugs for file naming: lowercase, spaces replaced with hyphens, special characters stripped.

Name Slug File
Billing Dev billing-dev agents/billing-dev.md
Chief of Staff chief-of-staff agents/chief-of-staff.md
Dashboard Dev dashboard-dev agents/dashboard-dev.md

Plugin Structure

cortex/
  .claude-plugin/
    plugin.json          — plugin metadata
    marketplace.json     — marketplace definition (required for installation)
  skills/
    setup-cortex/        — first-time setup
    join-cortex/         — agent onboarding
    leave-cortex/        — agent offboarding
    register-agent/      — agent registration
  README.md
  LICENSE

Other Runtimes

Cortex is runtime-agnostic. The protocol spec defines the team directory format, agent notes, work queues, and coordination rules. Any agent that can read and write files can participate.

Adapter examples:

A mixed team — Claude Code chief of staff coordinating Codex and Gemini workers — works out of the box. The team directory is the universal interface.

License

MIT

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