Liminal
Liminal is a collaborative workspace that turns local Markdown/HTML files into a live, shareable UI and syncs edits in real time so humans and AI agents can work from the same continuously updating knowledge base.
https://useliminal.xyz/?ref=producthunt
Product Information
Updated:Jul 30, 2026
What is Liminal
Liminal is an AI-native collaborative workspace designed for humans, agents, and teams to build and share living company knowledge. Instead of moving docs between tools, Liminal uses the formats agents already produce—plain Markdown and HTML—stored as normal files on each agent’s local disk, and renders them into a clean, readable interface. Teammates can open a shared link to view and edit the same workspace in a browser, making it feel like a “second brain” that keeps compounding as work happens.
Key Features of Liminal
Liminal is a collaborative workspace designed for humans and AI agents that lives as plain local files (primarily Markdown and HTML) on each agent’s disk while syncing changes to teammates in real time. It renders those files into a clean, shareable UI instantly, lets collaborators edit in the browser, and writes edits back to local disk—creating an AI-native “second brain” where team knowledge continuously accumulates in formats agents already read and write.
Local-first, plain-file workspace: Knowledge lives on disk as regular Markdown/HTML files that agents and developers can directly access, version, and manipulate with existing tools.
Instant rendering from Markdown/HTML to UI: Converts agent-authored Markdown/HTML into a clean interface immediately, reducing friction from raw docs and ad-hoc formatting.
Real-time team sync: Keeps the workspace consistent across teammates by syncing updates live so everyone sees the same current state.
Shareable live links: Share a link for others to open the same live workspace in a browser without sending files over chat or setting up hosting.
Browser editing with write-back to disk: Teammates can edit in the browser and have their changes land back on your local files instantly, keeping local and shared views aligned.
Bring-your-own agents (AI-native collaboration): Designed to work with the tools people use all day (e.g., Claude Code/Codex-style agents) so multiple agents and humans can read/write into a shared knowledge base.
Use Cases of Liminal
Engineering team runbooks and incident knowledge: Maintain living operational docs (runbooks, postmortems, on-call notes) that agents can update locally and the team can review/edit live during incidents.
Product and design specs as living documents: Collaboratively iterate on PRDs, UX notes, and decision logs where agents draft in Markdown and stakeholders edit via browser with immediate sync.
Research and internal knowledge base: Aggregate findings, summaries, and references into a continuously compounding “second brain” that both humans and agents can query and extend.
Client-facing project workspaces: Share a live link to status updates, deliverables, and documentation without emailing docs or hosting static pages, while keeping a local source of truth.
Sales/solutions engineering playbooks: Build and update reusable proposals, implementation guides, and FAQs that agents can tailor locally and sync across the team.
Education and cohort-based programs: Run cohorts with shared materials and evolving notes where instructors/assistants (including agents) update content and participants collaborate in-browser.
Pros
Local plain files in familiar formats (Markdown/HTML) make it easy for agents and existing developer tooling to interact with the workspace.
Real-time sync + shareable links reduce collaboration friction compared to sending docs over Slack or managing Google Drive/hosting.
Browser edits that write back to disk help maintain a single source of truth while staying accessible to non-technical collaborators.
Cons
Local-disk syncing can introduce complexity around conflicts, permissions, and governance compared to centralized doc systems.
Markdown/HTML-first workflows may not fit teams that rely heavily on rich document features or complex structured databases.
Adoption depends on integrating smoothly with varied agent/dev environments and team security requirements.
How to Use Liminal
1) Create an account and sign in: Go to https://useliminal.xyz/signup to create an account, then sign in at https://useliminal.xyz/login.
2) Install/connect Liminal to a local workspace folder: Set up Liminal so it can watch a folder on your computer (your “workspace”). This is the folder your agent (Claude Code/Codex/etc.) will read from and write to as plain files.
3) Start by writing Markdown/HTML files locally: Create or open files in your workspace folder (e.g., .md or .html). Liminal is designed so your agent can write in the formats it already speaks (Markdown/HTML).
4) View the rendered workspace instantly in Liminal: Open Liminal’s UI to see your local Markdown/HTML rendered as clean, shareable UI immediately (no separate hosting or copying into docs).
5) Share the workspace with your team via a link: Use Liminal’s share feature to generate a link. Teammates can open the same live workspace in their browser and see the current state.
6) Collaborate in real time from the browser: Have teammates edit the workspace directly in the browser. Their changes sync in real time so everyone sees the same live workspace.
7) Sync teammate edits back to disk automatically: Confirm that browser edits land back in your local workspace folder instantly, keeping the workspace as plain files on disk.
8) Bring multiple agents into the same workspace: Point your agent(s) at the same local workspace folder so they can read/write the shared files. This enables human + agent + team collaboration in one continuously updating knowledge base.
9) Use it as an AI-native “second brain”: Organize ongoing notes, specs, plans, and outputs as files in the workspace so knowledge keeps updating and compounding as your team and agents work.
Liminal FAQs
Liminal is a collaborative workspace for humans, AI agents, and teams. It’s positioned as an “AI-native second brain” that lets agents write to local markdown/HTML files while Liminal renders them as a clean UI and syncs changes to collaborators in real time.
Liminal Video
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