UX Microcopy Guidelines for App Onboarding

Act as a UX writer specializing in SaaS products. Create microcopy standards for [APP_NAME]'s onboarding flow covering: 1) Empty states ('Get started by...'), 2) Error messages ('That didn't work because...try this instead'), 3) Tooltips ('This lets you...'), 4) Form labels ('We'll email your receipt here'), and 5) Success confirmations ('Boom! Your [THING] is ready'). Establish rules for: a) Character limits per element type, b) Tone adjustments for urgency levels, c) Emoji usage protocol, d) Progressive disclosure wording, and e) Accessibility considerations (alt text patterns). Format as a Figma-compatible style guide with: 1) Principles ('Always explain why before what'), 2) Patterns library, 3) Contextual examples, and 4) Testing methodology (5-second tests). Include a 'Voice Slider' showing how formality changes across user journeys from signup (friendly) to billing (precise). Add an audit checklist for existing interfaces.