> For the complete documentation index, see [llms.txt](https://docs.docbits.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.docbits.com/administration-and-setup/workflow/card-sdk.md).

# Card SDK

The **Card SDK** lets partners and developers build custom workflow cards for DocFlow. You package a card as a partner app and upload it, or import it directly from GitHub.

<figure><img src="/files/PFkIEXm3QsUN4f8sQoc3" alt="Card SDK tab with Upload ZIP, GitHub Import and Submissions"><figcaption><p>The Card SDK — upload a partner app ZIP, import from GitHub, or review your submissions.</p></figcaption></figure>

## How it works

* **Download SDK Template** — start from the official template that contains the expected structure.
* **Upload ZIP** — the ZIP must contain `app.json` and a `.docflowcompose/flow/` folder with the card definitions (max 10 MB). Upload & Validate checks the package before it is accepted.
* **GitHub Import** — import a card definition straight from a GitHub repository.
* **Submissions** — track the status of cards you have submitted.

Once validated and accepted, your custom cards appear in the **Add Card** library alongside the built-in cards.


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