> For the complete documentation index, see [llms.txt](https://guide.cronuszen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.cronuszen.com/gpcscripting/gpc-script-guide/reference/scope-and-limits.md).

# Scope and limits

This edition targets Zen Studio Live and the current 32-bit Zen compiler surface.

Use this page as a coverage audit and a quick target-limit reference. It explains how much of the compiler inventory is documented in this guide; it is not an API or constant lookup page.

### Guide coverage

The table compares the reader-facing guide with the complete compiler inventory:

* **Covered in this edition**: documented for readers in this guide.
* **Other inventory entries**: target-specific, legacy, validation-only, or non-reader-facing entries outside this edition's scope.
* **Compiler inventory total**: the sum of the preceding two count columns.

| Inventory category             | Covered in this edition | Other inventory entries | Compiler inventory total |
| ------------------------------ | ----------------------: | ----------------------: | -----------------------: |
| Compiler-recognized built-ins  |                      90 |                      12 |                      102 |
| Compiler constants             |                     909 |                     152 |                    1,061 |
| Validation-only constant names |                       0 |                       3 |                        3 |
| Compiler diagnostic codes      |                     166 |                       0 |                      166 |

***

### Current target limits

| Resource               |             Limit |
| ---------------------- | ----------------: |
| Runtime integer        |     signed 32-bit |
| Runtime variable slots |             1,020 |
| Stack slots            |             1,024 |
| Maximum bytecode       |      65,519 bytes |
| BVAR indexes           |         `0..1023` |
| OLED                   | `128 x 64` pixels |

The additional inventory counts keep the audit totals complete while the guide stays focused on current, reader-facing Zen Studio Live material.


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