---

name: cell-fit description: Use when triaging a study before any writing — stress-tests whether it clears Cell's bar (a complete, mechanistic, hypothesis-driven story with multiple converging lines of evidence) or belongs at a sibling. Use this first to decide Cell vs Molecular Cell vs Cell Reports vs Cell Reports Medicine before investing in framing or figures.

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.