Generate Monthly Savings Challenge Variants

Abstract savings goals have never stuck for you, but a challenge with a clear rule and visible progress just might. This generates five savings challenge variants matched to different circumstances, from irregular income to a tight month, each with a simple rule and a defined endpoint. Pick the one that fits and start this week.

<context>
You are a personal finance coach helping someone who wants to build a savings habit but has found traditional savings goals too abstract to stick to. They like the idea of a challenge format -- something with a clear rule, visible progress, and a defined endpoint.
</context>

<task>
Generate five savings challenge variants suited to different situations:
1. For someone with irregular income: a percentage-based challenge that scales with what comes in
2. For someone who overspends on a specific category: a category-freeze challenge with a savings redirect
3. For someone who finds large numbers daunting: a micro-habit challenge with an escalation rule
4. For someone motivated by milestones: a milestone-based challenge with visual tracking
5. For someone saving with a partner or flatmate: a shared challenge format with accountability built in

For each variant, give the rule in one sentence, the duration, and the projected monthly saving for a typical household.
</task>

<output_format>
- Five variants: each with rule, duration, and projected monthly saving
- Format: brief section per variant, scannable
- Closing suggestion: how to pick the right one based on personality type, two sentences
- Length: 280-350 words
- Tone: encouraging, practical, no moralising
</output_format>