Headlessly

headlessly

You are an expert in headless.ly — the composable business operating system where every business entity is a typed Digital Object with a verb conjugation lifecycle, event-sourced history, and an agent-native API surface.

When to Use

Activate when building on the headless.ly platform — defining business entities with Noun(), subscribing to cross-domain events, querying with time travel, or integrating headless.ly into the startups.studio control plane.

The Core Idea: SaaS Built for Agents, Not Humans

headless.ly rebuilds every major SaaS category — CRM, billing, project management, analytics, EHR, inventory, and 40+ more — as typed, event-driven APIs designed for AI agents to operate autonomously. Your agent doesn't need a dashboard. It needs CRM.Headless.ly/api/contacts.

The .do domain carries a triple meaning:

• Take Action — verbs do things to objects
• Durable Objects — Cloudflare state primitives, one per tenant
• Digital Objects — typed, versioned, event-sourced entities

Digital Objects: The Noun() DSL

Every entity is defined with Noun() from the digital-objects package — zero dependencies, zero codegen, full TypeScript inference via const generics:

import { Noun } from 'digital-objects'

export const Contact = Noun('Contact', {
  name:    'string!',
  email:   'string?#',              // optional, indexed
  stage:   'Lead | Qualified | Customer | Churned | Partner',
  company: '-> Company.contacts',  // forward graph edge
  deals:   '<- Deal.contact[]',    // reverse graph edge
  qualify: 'Qualified',            // custom verb → typed event
  capture: 'Captured',
})

Verb Lifecycle (Conjugation System)

Every verb gets a full conjugation automatically:

// Imperative — execute
await contact.qualify()

// BEFORE hook — validate or reject
Contact.qualifying(async (contact, ctx) => {
  if (!contact.email) throw new Error('Email required before qualifying')
})

// AFTER hook — react, trigger side effects
Contact.qualified(async (contact, ctx) => {
  await ctx.Campaign.create({ name: `Onboard ${contact.name}`, type: 'Email' })
})

// Attribution — who/what triggered it
contact.qualifiedBy  // → User or Agent record

Opt out of mutations to declare immutability:

export const Event = Noun('Event', {
  kind:    'string!',
  payload: 'json',
  update:  null,  // immutable — no updates, no deletes allowed
})

The 35 Core Entities Across 9 Domains

Three SDK Import Styles

// Universal context — access everything through $
import { $ } from '@headlessly/sdk'
await $.Contact.find({ stage: 'Lead' })

// Domain packages — explicit, tree-shakeable
import { Contact, Deal } from '@headlessly/crm'
import { Subscription }  from '@headlessly/billing'

// Domain namespaces — grouped access
import { crm, billing } from '@headlessly/sdk'
await crm.Contact.find({ stage: 'Qualified' })

Cross-Domain Event Automation

Wire business logic across domains without tight coupling:

Deal.closed(async (deal, $) => {
  await $.Subscription.create({ plan: 'pro', customer: deal.contact })
  await $.Campaign.create({ name: `Onboard ${deal.name}`, type: 'Email' })
  await $.Ticket.create({ subject: `Welcome ${deal.name}`, requester: deal.contact })
})

Time Travel Queries

Every entity has a full immutable event log:

// Query state as of a past timestamp
const leads = await $.Contact.find(
  { stage: 'Lead' },
  { asOf: '2026-01-15T10:00:00Z' }
)

// Roll back a specific record
await $.Contact.rollback('contact_fX9bL5nRd', { to: '2026-02-06T15:00:00Z' })

Promise Pipelining (One Round-Trip)

Via rpc.do — single network round-trip for chained operations:

const deals = await $.Contact
  .find({ stage: 'Qualified' })
  .map(contact => contact.deals)
  .filter(deal => deal.stage === 'Open')

Multi-Tenant URL Architecture

CRM.Headless.ly/api/contacts       → REST API
CRM.Headless.ly/mcp                → MCP tools surface  
CRM.Headless.ly/openapi            → OpenAPI spec
Healthcare.Headless.ly/crm         → same data, industry-specific defaults
headless.ly/~my-startup/Contact    → tenant-scoped

Entity IDs

All IDs use sqids format: contact_fX9bL5nRd, deal_k7TmPvQx, org_aQ4wMnZ

Stack

• Runtime: Cloudflare Workers + Durable Objects (one DO per tenant, near user)
• Database: ParqueDB (@dotdo/db) — hybrid relational-document-graph on Apache Parquet
• Transport: rpc.do with cap'n proto promise pipelining
• MCP: Three tools — search, fetch, do (runs arbitrary TypeScript via ai-evaluate)
• Auth: oauth.do — SSO, API keys, multi-tenant isolation
• Integrations: Stripe, Composio, Zapier, Slack, Discord, Apollo, BrowserBase, AWS SES