@ganttkit/plugin-dependencies

Dependency editing and finish-to-start auto-scheduling. Dependency lines are already drawn by the core (from each task's dependencies); this plugin adds the behaviour around them. Pure engine-side works with every renderer.

import { createDependencies } from '@ganttkit/plugin-dependencies'

const deps = createDependencies({ gap: 0, autoSchedule: true })
engine.use(deps.plugin)

deps.addDependency('design', 'build') // 'build' now depends on 'design'
deps.reschedule()                     // enforce constraints now

• Auto-schedule: when a task moves (task:dragend), dependents shift so none start before their predecessor finishes (+ gap days). Constraints only push tasks later, never pull them earlier.
• Editing: addDependency(predecessorId, successorId) (rejects cycles and self-links), removeDependency(...).
• Commands: deps.add, deps.remove, deps.reschedule.

It edits the engine's source rows, so it composes correctly with filtering and tree plugins (hidden rows are still scheduled).

Drag-to-create links (linkDrag, default true): connector handles appear at each bar's right edge drag from one to another task to create a dependency. This uses the renderer's overlay slot, so it needs a slot-hosting renderer (the bundled ones); it's inert under SSR/headless. You can still create links programmatically or via the deps.add command.

API

• createDependencies(options?) → { plugin, addDependency, removeDependency, reschedule }
  • gap min days between predecessor end and dependent start (default 0)
  • autoSchedule reschedule on drag (default true)
  • linkDrag connector handles + drag-to-create (default true)

License

MIT