📌 This is Closure — a fork of OrisonSpace (Apache-2.0). On top of OrisonSpace's local-first AI writing IDE, Closure adds its narrative operating system layer: structured state machines (CognitionGraph / desire vectors / world entries / information-gap state machines / narrative dependency graphs), a structured knowledge base with hybrid retrieval (a deterministic pure-code core), and original modules such as information-gap control, emotion loops, the desire engine, theme gravity fields, and ripple propagation.
Closure as a whole is released under AGPL-3.0-or-later; code derived from OrisonSpace retains Apache-2.0. For attribution and provenance, see NOTICE.
Closure is an open-source, local-first AI novel-writing IDE for web-novel and long-form fiction authors, bringing outlines, chapters, characters, and worldbuilding asset cards into one workspace. Its principle is "you lead the creativity; the AI writes and self-checks": AI generation, continuation, polishing, review, and controlled edits, connected to any OpenAI-compatible model — with all creative data kept on your own computer. Windows is the priority platform; macOS / Linux are inherited from the upstream architecture. Closure is open source under AGPL-3.0-or-later (code derived from OrisonSpace retains Apache-2.0).
Feature Highlights
The Closure Layer: Narrative Engineering
Publisher’s description
What is Closure?
Closure is an open-source ai assistants & llm program for Windows from AoharuCat. It is written in TypeScript.
Installation and requirements
Official installers exist for 64-bit as EXE (NSIS). It can be installed for the current user only, without administrator rights. The installer supports unattended (silent) installation.
Popularity and file types
The source code on GitHub (AoharuCat/Closure) has 19 stars. Similar programs include Codex CLI, Claude Code and ChatGPT.
Project description on GitHub: “Closure（可露希尔）— 开源、本地优先的 AI 小说创作 IDE。Open-source, local-first AI novel-writing IDE. Fork of OrisonSpace.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Installs without administrator rights
- Updated in the last two months
Cons
- No native ARM64 build
In short: Closure is an open-source ai assistants & llm tool for 64-bit PCs. Administrators can deploy it unattended.
Is Closure safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
C924964B6128EC7A0A4329DB2357DCDE914C1CABDFB7BEA562C136158735E72B· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.4.0Latest | September 22, 2026 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id AoharuCat.Closure -eClosure-Setup-0.4.0.exe /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- AoharuCat
- Category
- AI assistants & LLMs
- Licence
- AGPL-3.0-or-later
- Price
- Free
- Source code
- github.com/AoharuCat/Closure
- Written in
- TypeScript
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- EXE (NSIS)
- Version
- 0.4.0
- Released
- September 22, 2026
- Added to the catalogue
- October 9, 2026
- Versions listed
- 1
- GitHub stars
- 19
- GitHub forks
- 3
- Website
- github.com
- winget ID
- AoharuCat.Closure
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Closure
See all ›-
Codex CLI0.161.0Codex CLI is an open‑source local coding agent that runs in your terminal, letting you write, edit, and understand code without leaving the command line.Open source16.6K ↓ -
Claude Code2.1.302Unleash Claude’s raw power directly in your terminal. Search million-line codebases instantly. Turn hours-long workflows into a single command. Your tools. Your workflow. Your codebase, evolving at thought speed.Proprietary67.1K ↓ -
Open source17.1K ↓ -
Open source8.7K ↓ -
Open source3.3K ↓ -
oh-my-pi18.13.1⌥ AI Coding agent for the terminal — hash-anchored edits, optimized tool harness, LSP, Python, browser, subagents, and moreOpen source654 ↓ -
Open source14K ↓ -
Open source1.9K ↓
Frequently asked questions
Is Closure free?
Yes. Closure is open-source software under the AGPL-3.0-or-later licence.
Is Closure safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Closure with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Closure be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Closure run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Can I use Closure without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to Closure?
Codex CLI, Claude Code, ChatGPT, GPT4All and Jan. The alternatives page compares them.
