> For the complete documentation index, see [llms.txt](https://docs.onum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onum.com/actions-changelog/message-builder.md).

# Message Builder

Learn more about this Action in [this article](/pipelines/actions/formatting/message-builder.md).

<details>

<summary>v1.1.2</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">07/08/2026</mark>

The output fields indicate which ones are the source fields now.

</details>

<details>

<summary>v1.1.1</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">01/21/2026</mark>

JSON mode performance improved.

</details>

<details>

<summary>v1.1.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">09/10/2025</mark>

New JSON mode added, which allows users to select literal value JSON types.

</details>

<details>

<summary>v1.0.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">06/04/2025</mark>

Added mode selector with 4 modes:

* **None** - free text editor for the user to input expressions. Same behaviour\
  as previous versions.
* **CSV** - given a value separator, and a list of fields/literals, generate a\
  CSV output.
* **Key-Value** - given a Key-value separator and an external separator, and a\
  list of key value objects, generate a KV list.
* **JSON** - given a list of key-value objects, generate a JSON object (no\
  nesting).

</details>

<details>

<summary>v0.2.1</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">04/07/2025</mark>

Character `#` is now accepted as a valid character in event field names.

</details>

<details>

<summary>v0.2.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">10/30/2024</mark>

Fixed the issue of surrounding characters when the delimiter is found in a field. The field value should be surrounding only if it contains the delimiter.

</details>

<details>

<summary>v0.1.1</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">09/05/2024</mark>

Timestamp represented in milliseconds.

</details>

<details>

<summary>v0.1.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">09/05/2024</mark>

Added support for `_{xxx}` tokens. They will be replaced by the content itself.

</details>

<details>

<summary>v0.0.2</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">07/04/2024</mark>

New action command when a field's value includes occurrences of the field delimiter used.

</details>

<details>

<summary>v0.0.1</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">05/06/2024</mark>

Initial version

</details>