Ship without breaking the graph

01 / THE BRIEF

Your mission

Produce the earliest possible parallel release waves for the target checkout. Each component takes one wave. A dependency must finish in an earlier wave. Include only the target and its transitive dependencies, once each. Sort names alphabetically within each wave.

Acceptance criteria

1. Include all transitive dependencies and checkout exactly once.
2. Exclude unrelated analytics.
3. Never schedule a dependency in the same or a later wave.
4. Use the minimum number of waves; sort each wave alphabetically.

Input fixture

{
  "target": "checkout",
  "dependencies": {
    "checkout": [
      "api",
      "ui"
    ],
    "api": [
      "schema",
      "auth"
    ],
    "ui": [
      "design"
    ],
    "auth": [
      "schema"
    ],
    "schema": [],
    "design": [],
    "analytics": [
      "schema"
    ]
  }
}

Expected output shape

[["component", "component"], ["component"]]

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