1## ADDED Requirements23### Requirement: Authored proof titles SHALL fit the supported mobile ceiling45The pack loader SHALL reject a proof title longer than 64 characters with the6player-facing error `Titles can be at most 64 characters so they fit on phones`.7Titles of 64 characters or fewer SHALL remain unchanged. The existing8nonblocking W11 recommendation for titles longer than 32 characters SHALL9continue to apply to otherwise valid packs.1011#### Scenario: A title at the ceiling remains playable1213- **WHEN** a pack contains a proof title of exactly 64 characters14- **THEN** the loader accepts the title unchanged and the W11 long-title note15 remains available1617#### Scenario: An overlong title rejects the pack1819- **WHEN** a pack contains a proof title of 65 characters20- **THEN** the loader rejects the pack atomically with `Titles can be at most21 64 characters so they fit on phones`