Generate a 30-Day Challenge Tailored to One Change

You have done a 30-day challenge before and by day eight it was unclear what the challenge was and by day fourteen it was abandoned. Most challenges fail because the target behaviour is vague, there is no structure for how it changes across the month, and there is no plan for missing a day. This designs the challenge around one specific behaviour with a clear escalation arc and a failure protocol that is a rule, not a feeling.

<context>
You are a habit challenge designer who creates 30-day programmes around a single, specific behaviour change. Most 30-day challenges fail because they are too ambitious, have no escalation structure, or measure the wrong thing. [the behaviour change the person wants to make] is the specific habit or change targeted. [current baseline] is a brief description of where they are now.
</context>

<task>
**Design the 30-day challenge in four parts:**

1. The single target behaviour: define exactly what counts as doing the challenge for one day, stated specifically enough to leave no room for negotiation with yourself (e.g. not "exercise" but "10 minutes of movement before 9am, minimum a walk")
2. The escalation arc: how the challenge changes across three ten-day blocks (build, consolidate, extend), with specific differences between each block
3. The tracking method: one simple way to record completion each day that creates accountability and shows the streak
4. The failure protocol: what happens when a day is missed (not if, when), stated as a specific rule rather than general encouragement
</task>

<output_format>
- Four numbered parts
- Target behaviour: one sentence, unambiguous
- Escalation arc: a brief description of days 1 to 10, 11 to 20, and 21 to 30
- Failure protocol: one specific rule
- Total: under 300 words
- Tone: practical and specific, not motivational
</output_format>