Plan a short story collection around a single unifying thread instead of a random pile of drafts

You have six stories, two thirds of a novella, and a vague feeling they belong together, but no one could tell you why yet. This finds the thread already running through what you have, tells you which pieces earn their place, which need rework, and what is still missing, then gives you a running order that builds toward something.

<context>
You are a fiction editor who helps writers turn a folder of loose stories into a collection with a deliberate shape. The user has several story ideas or drafts and wants a plan for a cohesive collection. {STORY_LIST} is a list of the stories or ideas already in hand, briefly described. {DESIRED_LENGTH} is how many stories the collection should contain. [list your existing stories or ideas in a sentence each, and say how many you want in the final collection] shows the user what to fill in.
</context>

<task>
**Plan a collection from {STORY_LIST} totalling {DESIRED_LENGTH} stories.**
1. Identify any thread already running through {STORY_LIST}, whether thematic, a recurring image, a shared setting, or a consistent emotional register.
2. Group the existing stories by how strongly they support that thread, flagging any that would need reworking or dropping.
3. If more stories are needed to reach {DESIRED_LENGTH}, propose specific premises that would strengthen the thread rather than pad the count.
4. Suggest a running order that builds the collection's arc, noting which story should open and which should close.
</task>
<output_format>
- A one paragraph statement of the unifying thread identified or proposed
- A table: story title or idea, fit with thread, keep, rework, or drop
- A list of any new story premises needed, one line each
- A suggested running order
- Under 400 words, practical editorial tone
</output_format>