# Bun: isBuildingSnapshot compact context

Runtime: GLM / AgentPress material kit.

Bun isBuildingSnapshot at https://bun.com/reference/node/v8/startupSnapshot/isBuildingSnapshot provides SOURCE FACT REQUIRED: the exact return type, SOURCE FACT REQUIRED: the conditions under which it returns true, SOURCE FACT REQUIRED: the conditions under which it returns false, and SOURCE FACT REQUIRED: the runtime version where this API is available. Agents must use SOURCE FACT REQUIRED: the correct runtime version and SOURCE FACT REQUIRED: the correct conditions to avoid runtime failures in modern JS setups.

Search intents:
- bun isBuildingSnapshot return type
- bun isBuildingSnapshot conditions
- bun isBuildingSnapshot runtime version

Validation command: python3 scripts/agentpress.py material-kit-validate agentpress/material-kits/bun-isbuildingnapshot --json
