Bunsho
Bunsho is a story-aware integrated writing environment for novelists, available as a free desktop application for macOS and Windows. It combines a traditional manuscript editor with a continuity engine that reads the user's prose and builds a story model of characters, places, objects, and world rules. Instead of requiring writers to fill out forms, Bunsho extracts these elements directly from the text, then uses them to detect continuity errors, plot holes, and inconsistencies in timelines, character knowledge, and scene details. Beyond checking, Bunsho provides four views of a story: Editor for writing, World for tracked entities, Planner for chapter intents, and Continuity for flagged contradictions. When a check finds an issue, both conflicting passages are shown side by side. The software also maps the ripple effects of a fact change, showing which scenes, lines, and callbacks need a second look. Director Mode allows writers to @-tag characters and describe what happens next; Bunsho drafts the scene as a beat sheet, runs a preflight check against what characters already know, and renders prose that the writer can accept, re-render, or discard. Bunsho is free to download and the editor requires no account. AI features unlock with a free sign-in and monthly credits, with Storyteller and Saga tiers receiving increased monthly credits. It is positioned for novelists, plotters, and discovery writers who care about story logic and continuity, not just prose style.
- Category
- AI Checker
- Pricing
- Unknown
Problem solved
Bunsho solves the problem of maintaining story consistency in long-form fiction by automatically detecting continuity errors, plot holes, and character/world inconsistencies before readers encounter them, and by helping writers understand the downstream impact of changes.
Use cases
- Checking a completed draft for continuity errors and contradictions
- Tracking character attributes like age, location, and knowledge across chapters
- Maintaining world rules and object states while writing
- Planning chapters with intent cards and scene beats
- Using Director Mode to draft scenes from character-tagged prompts
- Reviewing ripple effects of a fact change across scenes and callbacks
Audience
- Content Creators
- Hobbyists
Pros
- Continuity engine built into the writing environment
- Reads story model directly from prose, no manual forms
- Flags contradictions with both passages in view
- Director Mode preflights character knowledge before drafting
- Free to download; editor works without an account
Cons
- AI features require free sign-in and monthly credits
- Pricing details not publicly listed
- Only available for macOS and Windows
- No web or mobile version mentioned
- Limited to fiction/novel writing use cases
Official website: https://www.bunsho.io/
Canonical LambdaBase page: https://www.lambdabase.com/tools/bunsho