Rule: Compatible addition

Canonical rule slug: compat-addition. ← back to all rules

The new release adds a declaration without touching anything that already existed, which existing binaries and sources are unaffected by.

Canonical demonstration

• case03_compat_addition — Compatible Addition (New Export) (🟢 COMPATIBLE)

Used by scenarios

• case78_task_arena_attach_tag — task_arena::attach Tag Type Replaces Enum
• case92_bundle_provider_changed — Bundle — Symbol Provider Migration
• case107_task_scheduler_init_removed — task_scheduler_init Removed (historical ABI break)
• case108_task_class_removed — task Class Removed (historical ABI break — vtable angle)
• case110_concurrent_unordered_map_api_drift — concurrent_unordered_map API Drift