# Skill: effect/diagram-build — "תרשים שנבנה" (Diagram build)

Boxes pop in one after another and arrows draw between them: a flow, a cycle or a timeline.
תיבות קופצות אחת אחרי השנייה וחצים נמשכים ביניהן: תהליך, מעגל או ציר זמן.

Category: Overlays & graphics · שכבות וגרפיקה · a real preview: https://media.gpt.org.il/lookbook/effects/diagram-build.mp4?v=mv19exzc
Price: **60 credits per finished minute**: the render itself — 1 credit per second of 1080p output. Combined with captions, a hook or other effects: still one render, nothing more for combining.

Base URL: `https://apihub.co.il` · Auth: `Authorization: Bearer <API key>` · Docs: `/docs` (group "Video Effects")
Send `X-Tag: <job name>` on every call of one video; `GET /v1/usage?tag=<job name>` returns what it cost.
**Files are kept 24 hours** — download the finished video.

---

## 1. On its own — one call

```jsonc
POST /v1/effects/diagram-build             // x-wait-ms: 110000
{
  "video_url": "https://media.gpt.org.il/samples/sample-he.mp4",
  "start": 0.2,
  "duration": 4.6,
  "params": {
    "nodes": [
      "רעיון",
      "צילום",
      "עריכה",
      "פרסום"
    ],
    "kind": "cycle",
    "y": 6,
    "height": 40
  }
}
```

A normal render: `status: processing` → poll `GET /v1/executions/{id}` until `completed`, then read `output.url`.

When it plays: a stretch: `start` + `duration` (seconds of the finished video), or `at` (a word id) + `duration`, or `during` { from, to } (word ids).

## 2. With captions, a hook and other effects — the same render

```jsonc
POST /v1/studio/edit               // x-wait-ms: 110000
{
  "video_url": "<the video>",
  "language_code": "he",
  "captions": {
    "style": "classic"
  },
  "effects": [
    {
      "id": "diagram-build",
      "params": {
        "nodes": [
          "רעיון",
          "צילום",
          "עריכה",
          "פרסום"
        ],
        "kind": "cycle",
        "y": 6,
        "height": 40
      },
      "start": 0.2,
      "duration": 4.6
    }
  ],
  "audio": {
    "normalize": true
  },
  "output": {
    "aspect_ratio": "9:16",
    "resolution": "1080",
    "fit": "crop",
    "quality": "high"
  }
}
```

`effects` is a list: add more entries for more effects. The engine applies them by pipeline stage (cuts and time →
camera → grade and looks → overlays → text and captions → sound), never by their order in the list. An edit has one
`transition`, one `color` grade, one `music` bed, one `speed` and one caption style: two effects that set the same
one are refused with a message that names them.

## 3. Params

| param | default | range / options | what it does |
|---|---|---|---|
| `nodes` | **required** | list | The steps, in order |
| `kind` | `"flow"` | `flow` · `cycle` · `timeline` | flow = one after another · cycle = round a circle · timeline = along a line |
| `box_color` | `"#141414E6"` | string | The boxes |
| `accent` | `"#D0F808"` | string | The arrows and the boxes' edge |
| `text_color` | `"#FFFFFF"` | string | The labels |
| `size` | `3.2` | 1.5–6 | Label size, % of the frame height |
| `y` | `10` | 2–80 | Top of the diagram, % from the top |
| `height` | `44` | 20–90 | Its height, % of the frame |
| `panel` | `true` | boolean | A dark panel behind the diagram (reads over any video) |

GET `/v1/effects/diagram-build` returns the same as JSON (with the full body schema). Every field has a default; numbers
outside their range are refused with the field's name.