> ## Documentation Index
> Fetch the complete documentation index at: https://docs.summerengine.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SummerBuildIdentity

> Immutable Build and compatibility identity selected by Summer.

**Class:** `SummerBuildIdentity` · **Inherits:** RefCounted

Immutable Build and compatibility identity selected by Summer.

Represents immutable Build identity known to Summer. A signed native launch currently supplies the Build ID and exact artifact digest; protocol, synchronization, and prediction compatibility remain empty until a verified manifest or handshake supplies them. Synthetic local development uses explicit local compatibility placeholders. Callers must not interpret an empty compatibility field as compatible.

## Properties

| Property | Type | Access | Description |
| - | - | - | - |
| <a id="artifact_sha256" />`artifact_sha256` | String | read-only, `get_artifact_sha256()` | Lowercase artifact digest for a published Build; empty for synthetic local development. |
| <a id="build_id" />`build_id` | String | read-only, `get_build_id()` | Immutable Build identifier. |
| <a id="local" />`local` | bool | read-only, `is_local()` | Whether this is an explicit synthetic local Build. |
| <a id="prediction_compatibility_id" />`prediction_compatibility_id` | String | read-only, `get_prediction_compatibility_id()` | Compatibility group for deterministic prediction and replay behavior, or empty when not yet verified. |
| <a id="protocol_version" />`protocol_version` | String | read-only, `get_protocol_version()` | Summer gameplay protocol version, or empty when not yet verified. |
| <a id="sync_compatibility_id" />`sync_compatibility_id` | String | read-only, `get_sync_compatibility_id()` | Compatibility group for synchronization schema and semantics, or empty when not yet verified. |

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