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Trinity

Abilities Plugin Marketplace

The official agent development toolkit for Claude Code. Curated plugins covering the full agent lifecycle - from scaffolding and onboarding to deployment, scheduling, and ongoing operations.

Build and Deploy Agents in Cursor

Apr 2026

Quick Start

New to Trinity? Install the trinity plugin and run /trinity:start-here— a guided, resumable journey from “what is Trinity?” to your first agent running on your own instance. It sequences everything below, so you don't have to pick a starting point:

/plugin marketplace add abilityai/abilities
/plugin install trinity@abilityai
/trinity:start-here

Prefer to drive yourself? From Claude Code chat:

# Add the abilities marketplace (one-time)
/plugin marketplace add abilityai/abilities

# List available plugins
/plugin list abilityai

# Install core plugins
/plugin install create-agent@abilityai
/plugin install agent-dev@abilityai
/plugin install trinity@abilityai

Or from the terminal:

claude plugin add abilityai/abilities
claude plugin install create-agent@abilityai

Set up in the Claude Code desktop app

Prefer clicking to typing? The Claude Code desktop app (macOS and Windows) has the same marketplace built into Settings — no terminal required. It resolves to the same abilityai/abilities marketplace as the CLI. Here is the whole flow, start to finish.

1

Open Settings

From your account menu at the bottom-left of the sidebar, choose Settings (or press ⌘,).

Claude Code desktop app with the account menu open, Settings highlighted
2

Open the Plugins tab

In the Settings sidebar, under Customize, select Plugins.

Settings dialog with the Plugins tab selected under the Customize group
3

Add a marketplace

Click Add ▾ in the top-right of the Plugins panel and choose Add marketplace.

The Add dropdown in the Plugins panel showing Add marketplace, Upload plugin, and Create with Claude
4

Add from a repository

In the Add marketplace dialog, pick Add from a repository — “Sync a plugin marketplace from a GitHub repository or git URL.”

Add marketplace dialog with Browse Anthropic sources and Add from a repository options
5

Enter the repository

In the URL field, type abilityai/abilities. If the repository list doesn't load, click Use “abilityai/abilities” to continue.

The URL field with abilityai/abilities typed in and a Use abilityai/abilities option
6

Sync the marketplace

Click Sync. Only add marketplaces you trust — plugins run with your permissions and are not vetted by Anthropic.

The Add marketplace dialog with abilityai/abilities filled in and a Sync button
7

Install the plugins

The Directory opens with the Ability.ai plugins — Create agent, Agent dev, Dev methodology, Trinity, and Utilities. Click the + on each one to install it. Its skills become available as / commands right away.

The plugin Directory listing the Ability.ai plugins: Create agent, Agent dev, Dev methodology, Trinity, and Utilities

Available Plugins

PluginSkillsPurposeKey Skills
create-agent14Agent creation wizards/create-agent:prospector, /create-agent:custom
agent-dev25Extend existing agents, and work fleet-wide/agent-dev:create-playbook, /agent-dev:add-memory, /agent-dev:add-orchestrator, /agent-dev:add-canon, /agent-dev:agent-fleet-analysis
trinity7Deploy to and operate on Trinity/trinity:start-here, /trinity:connect, /trinity:onboard, /trinity:sync, /trinity:loop
dev-methodology24Development workflow/dev-methodology:implement, /dev-methodology:validate-pr
utilities7Ops and productivity/utilities:safe-deploy, /utilities:docker-ops
add-project-managementDeprecated — moved into agent-dev; the stub installs nothing/agent-dev:add-project-management

The Agent Development Workflow

Abilities supports a four-step workflow:

1. Scaffold              2. Develop                    3. Deploy                    4. Iterate
/create-agent:*          /agent-dev:create-playbook    git push → /trinity:onboard  git push → /trinity:sync
                         /agent-dev:add-memory         (or onboard in place)        /create-agent:review
                         /agent-dev:add-backlog                                     /create-agent:adjust
1.Scaffold - Use a wizard like /create-agent:prospector or /create-agent:custom to get a fully configured agent
2.Develop - Use /agent-dev:create-playbook to add capabilities, /agent-dev:add-memory for persistence
3.Deploy - Run /trinity:connect once to authenticate, push the agent's repo, then /trinity:onboard per agent - Trinity clones the repo and tracks the branch. An agent that is already deployed from a bare repo can be onboarded in place by running /trinity:onboard inside it
4.Iterate - Push changes and run /trinity:sync, which also reconciles declared schedules and plugins onto the instance. Use /create-agent:review and /create-agent:adjust to audit and improve

What Wizard-Created Agents Include

Every agent created with the wizards includes:

CLAUDE.md - Identity and behavioral instructions
Initial skills - 2-4 playbooks based on agent purpose
Onboarding system - onboarding.json + /onboarding skill
Dashboard - dashboard.yaml + /update-dashboard skill
Trinity files - template.yaml (declaring credentials, schedules:, and plugins:), .env.example, .mcp.json.template
Git repo - Initialized and committed

See Also

Trinity CLI - Command-line deployment
Skills and Playbooks - How skills work in Trinity
GitHub: abilityai/abilities - Source repository