Bunsho

Bunsho is a desktop writing environment built for novelists who want to keep their stories logically consistent without juggling spreadsheets or sticky notes. It's not a ghostwriter — it's a continuity assistant that reads your manuscript and flags contradictions before your readers do. The editor itself is free to download and works without an account; AI features unlock with a free sign-in and a credit system.

When you ask for a continuity check, Bunsho builds a model of your story from your prose — characters, places, objects, and rules — then surfaces every inconsistency with both passages in view. It catches drifting ages, abandoned coats, and timeline mismatches. Director Mode takes it further: you @-tag a character, describe what happens next, and Bunsho drafts a beat sheet that runs a preflight check against everything that character already knows. You approve each beat before any prose is written. The tool also offers a World tab that automatically extracts entities from your text, a Planner with chapter cards, and a Continuity view that organizes findings by type (factual, timeline, world).

Bunsho is ideal for novelists, plotters, and discovery writers who care about story logic. It's especially useful for complex narratives with large casts, multiple timelines, or intricate world rules. Use it to catch plot holes during drafting, plan chapters with clear intent, or ensure character details stay consistent across a series. The free tier gives you one project and starter AI credits to try the continuity checker and Director Mode.