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Orison Space is an open-source, local-first AI-powered novel writing IDE developed by LumenStorm, designed as an end-to-end workbench that takes authors from initial inspiration to finished manuscript. Currently at version 0.3.0 with two versions available in total, it is licensed under Apache-2.0 and runs on Windows, macOS, and Linux. Aimed primarily at web fiction and long-form novel writers, it consolidates outlines, chapters, character profiles, and worldbuilding asset cards into a single workspace rather than scattering them across multiple documents. Following a "user-led creation, AI-assisted" principle, it provides AI generation, continuation, polishing, reviewing, and controllable modification, with every AI-driven change previewable and reversible, and connects to any OpenAI-compatible endpoint so users bring their own API keys and freely choose text and image models. Notable features include agent orchestration with nested Skill, Workflow, and sub-agent invocation where the LLM automatically calls tools; image generation and editing with brush, mask, and crop controls whose results are stored directly in the library; version management built on isomorphic-git offering commit nodes, branches, diffs, and timelines; an IDE-style editor with split view, minimap, multi-tab support, and a command palette; DOCX preview and import/export for chapters and outlines; and light, dark, and custom themes with bilingual Chinese-English support extensible via YAML. All project files remain stored locally on the user's computer with no cloud uploads or account login required, making the software suitable for authors who need long-term consolidation of story assets, creators who want AI assistance without surrendering creative control, privacy-conscious users who value data ownership, and those who prefer to manage their own model connections. Its relevant category is creative writing and authoring software.
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