> For the complete documentation index, see [llms.txt](https://docs.uptiq.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.uptiq.ai/platform-resources/skill-library/document-skills/document-to-zip.md).
# Document To Zip
**Document To Zip** combines one or more documents into a single ZIP archive, so downstream steps — and the people at the end of them — deal with one file instead of many.
## How it works
1. **Input resolution** — uses `$input` (the previous skill's output) and `$secret` (vault secrets).
2. **Processing:**
* Resolves each `documentId` in the `documents` list.
* Fetches binary content from the declared `source` (`conversation` or `storage`).
* Streams files into an in-memory ZIP buffer, or a temp file if the bundle exceeds 50 MB.
* Uploads the archive to the selected `outputStorage` target.
* Emits a new `zipDocumentId`.
3. **Execution** — hybrid. Small bundles run blocking; large bundles switch to async automatically. There is no threshold control in the configuration.
4. **Response:**
* **Success** — metadata for the new ZIP.
* **Failure** — `statusCode >= 400` with a `reason` naming the first failing document.
Document To Zip processing flow
{% hint style="warning" %}
**Partial bundles are discarded.** If any document fails, you get no archive at all — not an archive missing a file. That is the right behavior when the ZIP is a legal or underwriting package, but it means one bad `documentId` costs the whole bundle.
{% endhint %}
## Worked example: packaging a loan application for an underwriter
A workflow collects everything a loan application needs — the form, the credit report, income statements, ID proofs. Once the agent has extracted the key data and run its initial checks, all of it has to reach a human underwriter.
**The problem.** Sending a dozen separate files is cumbersome and error-prone. Underwriters want one consolidated package, not an inbox to reassemble.
**The approach.** Finish the workflow with a Document To Zip skill. Pass the `documentId` values accumulated along the way, set `outputStorage` to persistent storage, and give `zipFileName` something a person can recognize — the application reference rather than `bundle-1718553600.zip`.
The `zipDocumentId` it returns behaves like any other document, so the next step can attach it to an email or hand it to an API.