---
name: cell-fit
description: Use first, before any writing, to stress-test whether a study clears Cell's bar — a complete, mechanistic, hypothesis-driven story with converging evidence. Decides Cell vs Molecular Cell vs Cell Reports vs Cell Reports Medicine.
---

# Scope & Significance Fit (cell-fit)

## Why this is skill #1

Cell triages **most submissions to rejection without external review**. The gate is not "is it correct" and not even "is it a striking result" — it is **"is this a complete, mechanistic story of broad importance to the life sciences."** A single beautiful observation with no mechanism is desk-rejected. Run this before investing in prose.

## When to trigger

- Before drafting, to decide if Cell is even the right Cell Press venue.
- When a co-author says "this is a Cell paper" and you need a sober second opinion.
- When choosing between Cell, Molecular Cell, Cell Reports, Cell Reports Medicine, and Nature/Science.

## The "complete story" test

Cell wants a hypothesis-driven narrative where **multiple independent lines of evidence converge on a mechanism** and a clear conceptual advance. Ask:

- **Phenomenon:** is the central finding established robustly (not one assay)?
- **Mechanism:** do you explain *how* it works at a molecular/cellular level — not just *that* it happens?
- **Convergence:** do genetics + biochemistry + cell biology + (in vivo, where relevant) point the same way?
- **Causality:** loss-of-function **and** gain-of-function (or equivalent perturbation pair) where feasible?
- **Significance:** does it change how a broad community thinks, beyond your subfield?

If any of mechanism / convergence / causality is missing, it is likely **not yet** a Cell paper — name what experiment closes the gap.

## Significance ladder (weak → strong)

1. **Describes** a phenomenon with no mechanism. (Weak — not Cell.)
2. **Extends** a known mechanism to a new system incrementally. (Borderline — Cell Reports.)
3. **Defines** a new mechanism within an established framework. (Strong — Molecular Cell or Cell.)
4. **Reveals** a previously unknown mechanism / pathway / principle, fully worked out. (Strong — Cell.)
5. **Overturns or unifies** a textbook model with decisive, multi-angle evidence. (Strongest — Cell.)

If you cannot place the work at rung 4+ with completeness, Cell is a long shot — be honest and name the realistic Cell Press venue.

## Fatal pre-review-reject triggers

- **Descriptive only**: a phenotype or correlation with no mechanism.
- **Single line of evidence**: one technique carrying the whole claim.
- **Incremental** over the authors' own prior paper.
- **Mechanism asserted, not demonstrated** (a model cartoon unsupported by perturbation).
- **Over-claiming**: conclusion outruns the data (top post-review rejection reason).
- **Scope mismatch**: deep but narrow molecular detail with no broad lesson → Molecular Cell, not Cell.

## Venue routing within Cell Press and beyond

| Situation                                                          | Recommend                |
|--------------------------------------------------------------------|--------------------------|
| Rung 4–5, complete mechanism, broad, converging evidence           | **Cell** (Article)       |
| Deep **molecular** mechanism, rigorous, narrower domain            | **Molecular Cell**       |
| Solid and complete but less broadly transformative                 | **Cell Reports** (more accepting) |
| Translational / clinical complete story                            | **Cell Reports Medicine** |
| Developmental / cell-bio mechanism, strong but specialist          | **Developmental Cell** / field journal |
| Complete and broad but you want the widest general audience        | also consider **Nature / Science** |
| Strong but mechanism incomplete                                    | add perturbation experiments before submitting |

## Output format

```
【Significance rung】 1–5 + one-line justification
【Complete-story test】 phenomenon / mechanism / convergence / causality / significance → which are met
【Fatal triggers present】 [...]
【Recommended venue】 Cell / Molecular Cell / Cell Reports / Cell Reports Medicine / Dev Cell / Nature-Science
【If staying with Cell, the one-line conceptual advance】 "..."
【Gap-closing experiment, if any】 ...
【Next】 cell-framing (if pass) | reconsider venue (if fail)
```

## Anti-patterns

- **Do not** mistake a striking observation for a complete story — Cell wants the mechanism worked out.
- **Do not** rationalize a single-technique result into "multiple lines of evidence" with adjectives.
- **Do not** confuse technical difficulty or data volume with conceptual significance.
- **Do not** let sunk cost drive the venue decision; Cell Reports is an honest landing spot.

> Confirm scope expectations against current Cell Press author guidelines and recent Cell issues.