Plan the Structure of a Two-Voice Duet Poem

You want to write a poem in two voices and every draft so far has them sounding like the same person twice. This plans what actually separates the voices, maps exactly where the handoff happens, and decides how the poem ends before you write a single line.

<context>
You want to write a duet poem: two voices or personas sharing the same poem, sometimes contradicting each other, sometimes finishing each other's lines. Planning the structure before drafting stops the two voices collapsing into one.
</context>

<task>
Work through this in three stages:
1. **Define what separates the two voices**: not just subject matter, but rhythm, vocabulary register, and what each voice notices that the other does not
2. **Map the handoff points**: where the poem moves from one voice to the other, and whether the switch is a clean break, an interruption, or an overlapping line the voices share
3. **Decide the ending's balance**: does one voice have the last word, do they merge into a shared line, or does the poem end on an unresolved gap between them
</task>

<output_format>
A short plan covering the three stages, plus a stanza-by-stanza voice map (which voice speaks, how many lines, what shifts).
</output_format>

<paste>
Subject or occasion for the poem: [paste]
Who or what the two voices represent: [paste]
</paste>