re0-plan

1Open `.re0/iteration/active/<version>-<workname>/` and write into it in the same motion, before a single line of `re0-loop`'s cycle runs.
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3## Goal
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5A written thesis, gate list, and step plan keep a cycle from drifting toward its first framing. A seeded folder lets a resumed session recover that context. `re0-plan` writes real content at creation for either cycle weight. It assumes the full paperthin package installed and names sibling skills directly: `re0-release` retires the folder, and `re0-memo` extends its seed instead of starting fresh. This repository's casebook convention is not a portable planning method.
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7## Workflow
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91. Classify the cycle's weight: a fix or hardening pass with no real design surface is **lightweight**; a cycle whose direction warrants debate is **full**.
102. Create `.re0/iteration/active/<version>-<workname>/`, or `.re0/iteration/planned/<version>-<workname>/` when the cycle is queued for a later session, and write its first file in the same step, according to weight:
11   - **lightweight** → `RETRO.local.md`: one paragraph naming the task and why it's lightweight. `re0-memo` extends this same file at the end; it never starts a fresh one. Stop here.
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