Co-writing is the smallest collaborative world: two people, one canon. It feels manageable precisely because it is small — surely two people can just keep each other posted. In practice, two is enough for the world to split into two copies, and the breaks show up exactly where the two writers' work meets.
The craft of co-writing is managing those seams. Here is how to keep a shared world consistent when more than one hand is writing it.
Co-writing breaks at the seams
Within their own sections, co-authors are usually consistent — each is checking against the world as they understand it. The contradictions appear at the seams: the handoff where one writer's chapter meets the other's, where a fact one of them established was never seen by the other.
A character grieves a death in one author's chapter that the other author's chapter has not yet caused. A rule one writer treats as absolute, the other treats as flexible. Neither is wrong inside their own pages. The break lives in the gap between them — which is the part nobody owns.
Divide the work, not the truth
It is fine, even efficient, for co-writers to own different parts of a project — chapters, characters, a region of the map. What cannot be divided is the canon itself. The moment each author keeps their own copy of what is true, the seams are guaranteed to drift, because each is writing against a slightly different world.
One shared, live record of canon fixes the precondition: both authors are at least looking at the same world. Divide the writing however suits the book; keep the truth single.
Check the seams before you merge
Sharing one canon stops the copies from drifting, but it does not catch the contradictions that are already on the page — a fact in your co-author's chapter that quietly disagrees with one in yours. Those need an actual check, run across both writers' material at once, before the chapters are stitched together.
A consistency pass over the whole shared world finds the disagreements neither author would catch alone, because neither holds both halves in their head. Run it at the handoff, settle the contradictions while the pages are still cheap to change, and the seams stop being where the book falls apart.
Frequently asked questions
- How do co-authors avoid continuity errors?
- By sharing one live record of canon instead of two private ones, agreeing on what is settled before they write against it, and checking the seams — the handoffs between who wrote what — where co-written contradictions almost always hide.
- Should co-writers divide the world or share it?
- Dividing the work is fine; dividing the truth is not. Co-writers can own different chapters, characters, or regions, but they all have to write against one shared canon, or their sections will quietly contradict each other at the edges.
- Where do co-written stories usually break canon?
- At the seams — the points where one author's material meets another's. A fact one writer established and the other did not see is the classic co-writing continuity error.
CanonBoard scans your whole world and tells you where it disagrees with itself.
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