Page Action system prompt save failed (too long)

Page Assist version: 1.5.76 Browser: Chrome Version 151.0.7922.72 (Official Build) (64-bit)

Default system prompt for Page Action is already big (17KB). Upon minor modification, the Save failed: Error: Resource::kQuotaBytesPerItem quota exceeded

Editing the pageActionSystemPrompt value directly with chrome.storage.sync.set() also gives the same error because it exceeds the maximum length (8KB).

Default prompt works because it's stored as empty string ("").