Kosmos

Free plan Web

What Kosmos is

Kosmos is a structured workflow for producing nonfiction books inside Claude Code. It guides authors through ideation, research, structure, and writing, with AI focused on organizing material and reviewing the author’s work rather than composing manuscript prose. Research is stored as tagged entries, and Kosmos tracks coverage across themes so authors can see where more research may be needed. When web access is available, it can search for material related to those gaps. During drafting, it checks work against an eight-point checklist, tracks progress, and reviews consistency. Kosmos includes book outlining, a chapter workspace, and continuity tools, but not rewrite controls. Projects use Markdown files and work as Obsidian vaults; the maker recommends Obsidian but says any Markdown editor works. The files remain with users if they stop using Kosmos. It is free during beta, with access subject to manual review. Users need to provide Claude Code and a Claude Pro or Max subscription themselves. Setup is handled through Claude Code.

Who it suits

Kosmos suits nonfiction authors who want a structured book-making process and are willing to give feedback during the early beta. It requires Claude Code and a Claude Pro or Max subscription.

What it does well

Organizes tagged research and tracks theme coverage
Flags gaps for further research
Reviews drafts against an eight-point checklist
Markdown projects work as Obsidian vaults

What to know first

Requires a Claude Pro or Max subscription
Beta access requires manual approval
Does not include rewrite controls

Limits

Kosmos is free during beta, but use requires your own Claude Pro or Max subscription. Beta account access is manually reviewed and approved.

Plans

Plan	Billed and limits	Price
Beta	Free during beta · requires your own Claude subscription · access approved manually	Free

As kosmos.page lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit the Kosmos website and request beta access.
Wait for manual review and approval of your signup.
Provide Claude Code and a Claude Pro or Max subscription.
Use Claude Code to install the Kosmos CLI, authenticate, and set up a project.
Work with the project's Markdown files in Obsidian or another Markdown editor.

Verdict

Kosmos combines a phased nonfiction workflow with research tracking and draft review while leaving manuscript prose to the author. Its free beta may suit authors comfortable with the stated Claude requirements and manual access approval.

Questions

How much does Kosmos cost?

The Beta plan is free during beta. It requires your own Claude subscription.

Is there a free plan?

Yes. Kosmos is free during beta, with access subject to manual review and approval.

What platforms and editors does it support?

Kosmos runs inside Claude Code and is listed for web. Obsidian is recommended, and any Markdown editor can be used.

Does Kosmos write book prose?

No. Its AI organizes research, advises on structure, and reviews drafts; it does not write manuscript prose.

What files can I export?

The listed export format is Markdown. Projects work as Obsidian vaults, and the maker says users keep their files if they stop using Kosmos.

Who makes Kosmos?

The maker identifies himself as Joakim Achren and says he has self-published nonfiction books.

Facts from Kosmos's own pages

Access: During beta, the maker manually reviews and approves every signup. · kosmos.page, 8 Oct 2026
AI role: AI organizes research, tracks coverage gaps, advises on structure, and reviews drafts; it does not write manuscript prose. · kosmos.page, 9 Oct 2026
Beta access: During the beta, the maker manually reviews and approves account access. · kosmos.page, 9 Oct 2026
Beta status: Kosmos is described as an early beta, and the maker says the tooling is new and feedback is welcome. · kosmos.page, 8 Oct 2026
Draft review: AI reviews drafts against an 8-point checklist and checks for consistency. · kosmos.page, 9 Oct 2026
Editor compatibility: Obsidian is recommended, and the maker says any Markdown editor works. · kosmos.page, 8 Oct 2026
File format: Project files are Markdown and work as an Obsidian vault; the maker says users keep their files if they stop using Kosmos. · kosmos.page, 9 Oct 2026
Integrations: Kosmos runs inside Claude Code; Obsidian is recommended, and any Markdown editor can be used. · kosmos.page, 9 Oct 2026
Intended users: The maker is seeking authors interested in a structured approach to book production who are willing to provide feedback. · kosmos.page, 9 Oct 2026
Maker: The maker identifies himself as Joakim Achren and says he has self-published nonfiction books. · kosmos.page, 8 Oct 2026
Prerequisite: Kosmos requires Claude Code and a Claude Pro or Max subscription, which users provide themselves. · kosmos.page, 8 Oct 2026
Process: Its four phases are ideation, research, structure, and writing. · kosmos.page, 8 Oct 2026
Purpose: Kosmos is a structured methodology for producing nonfiction books that runs inside Claude Code. · kosmos.page, 9 Oct 2026
Requirements: The maker says Claude Code requires a Claude Pro or Max subscription. · kosmos.page, 9 Oct 2026
Research: Kosmos organizes research into atomic tagged entries, tracks theme coverage, and identifies gaps for further research. · kosmos.page, 8 Oct 2026
Research organization: Kosmos organizes research into atomic, tagged entries and tracks coverage across themes. · kosmos.page, 9 Oct 2026
Setup: Claude Code handles installation of the kosmos-cli, authentication, and project setup. · kosmos.page, 9 Oct 2026
Support: The maker asks beta users to share feedback about what works and what does not. · kosmos.page, 9 Oct 2026
Web research: Kosmos can search for material to fill research gaps when web access is available. · kosmos.page, 9 Oct 2026
Workflow: The process has four phases: ideation, research, structure, and writing. · kosmos.page, 9 Oct 2026

Where Kosmos stands on Freedom251

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