@sequenceholdings/lattice

SDK for defining Sequence Lattice processes — declarative process graphs of automation, agent, human, delay, and managed-function nodes, executed by the Sequence platform.

This package is pure TypeScript with no runtime dependencies: it provides the define* authoring surface, bundle hashing/serialization, event types, and typed errors. Execution happens server-side on the Sequence platform; use @sequenceholdings/studio-cli (seq-studio) to lint, plan, and apply processes.

Install

pnpm add @sequenceholdings/lattice

Usage

import {
  defineProcess,
  defineNativeAutomationNode,
  defineAgentNode,
  defineHumanNode,
  defineDelayNode,
} from '@sequenceholdings/lattice'

export default defineProcess({
  id: 'my-process',
  entry: 'first_step',
  nodes: {
    first_step: defineNativeAutomationNode({
      fn: async (input) => ({ payload: { ok: true } }),
      edges: { done: { to: 'review' } },
    }),
    review: defineHumanNode({
      title: 'Review the result',
      edges: { approved: { to: null }, rejected: { to: 'first_step' } },
    }),
  },
})

Subpath exports

import { defineProcess }      from '@sequenceholdings/lattice/define'
import { computeBundleHash }  from '@sequenceholdings/lattice/bundle'
import { EVENT_TYPE }         from '@sequenceholdings/lattice/events'
import { InvalidEdgeIdError } from '@sequenceholdings/lattice/errors'

Workflow

Scaffold a process repo and iterate with the CLI:

pnpm add -g @sequenceholdings/studio-cli
seq-studio process init my-processes
cd my-processes
seq-studio process lint          # static graph checks (offline)
seq-studio process simulate <id> # local walk with stubbed runners (offline)
seq-studio process plan  -e <env>
seq-studio process apply -e <env>

Applying processes to a Sequence environment requires platform authorization — see the studio-cli README.

License

Proprietary — © Sequence Holdings. All rights reserved. Published for use with the Sequence platform; no license is granted to copy, modify, or redistribute.