On by default
Automations
When something happens in the project, it runs the steps you chain.
- Triggers from every plugin: a spec, a task, a commit
- Your AI Agent commands as steps
- Asks before anything leaves your machine
Features
Write each part down once. Every tool works from it.
A canvas, a backlog, comments, git, and your own AI agent, built around one idea: every part of your project is its own page, a plain file shaped by a framework you choose.
Free for macOS, Windows, and Linux. No account, no subscription.
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The model
Every tool works from the same page.
- One markdown file per part of what you make, with a permanent id that survives every rename.
- Tasks, canvas nodes, comments, and your agent all link to it by that id, and the page shows them back.
- When something changes, your automations take the next step: a commit, a comment, a task, or an agent command. They stop to ask you where it matters.
- All of it is plain text in one folder you own, and in git if you use it.
- A tasklinks to it by id
- An image or a PDFlinked to it
- A canvas nodedrawn from it
- A commenton one of its sections
One blueprinta markdown file with a permanent id
The core
Always there
Blueprints
One markdown file per part of what you make, checked against a framework you declare.
- Typed properties and a permanent id on every file
- Collections, templates, and properties you choose
- A health check in the app and in a terminal
The plugins
Four that change how you work, and the ones that keep it tidy.
On by default
AI Agent
The agent you already run, beside every page, with your team’s own slash commands.
- Claude Code, Codex, or any ACP agent
- Built-in and custom slash commands
- /grill asks before anything is written
One switch to turn on
Backlog
A board where every task is a markdown file tied to its blueprint.
- Your statuses, columns, types, and priorities
- Subtasks, links, and checklists
- Attached tasks beside every blueprint
One switch to turn on
Canvas
A whiteboard whose nodes are your blueprints, drawn live from their files.
- Nodes drawn live from your files
- Sketches that become blueprints
- Frames, flows, stickies, and pages
On by default
Comments
Threads on a section, with reactions, saved in the file.
- Anchored to a heading or a requirement
- Reactions and @mentions
- Readable in the file and in git
On by default
Git
File history, diffs, commit, and publish, without a terminal.
Explore GitOn by default
Assets
Images and PDFs linked to the blueprints they belong to.
Explore AssetsOn by default
Linter
One markdown style for the whole project, applied on every save.
Explore LinterOne switch to turn on
Terminal
Your own shell in the panel, started in the project.
Explore TerminalOnly what you need
Every plugin is a switch.
Switch a plugin off and your files stay exactly as they were. A new project starts with the AI Agent, Automations, Assets, Comments, and the Linter on, plus Git in a git repository. The Backlog, the Canvas, and the Terminal are one switch away under Built-in plugins.
Works with what you use
Your agent, your repository, your editor.
- Your agentClaude Code, Codex, or another agent that speaks ACP (the open Agent Client Protocol), signed in with your own account.
- Your git hostGitHub, GitLab, or anywhere git pushes. Eidos commits, pulls, and publishes. The repository stays yours.
- Your editorOpen any file in VS Code, Cursor, Zed, or another editor you list. The page follows your changes.
- ObsidianExport a canvas as JSON Canvas, bring an Obsidian theme, or lay the ACE framework over a vault.
- JiraBring a Jira Cloud board into the Backlog with the Jira plugin, and send your changes back one ticket at a time.
- SpreadsheetsExport a collection or the backlog as CSV or an Excel workbook.
Why it’s different
What other apps don’t have.
Other apps have a canvas, a board, or an agent panel. What Eidos adds is underneath: every part of your project is its own markdown file, checked against templates you chose, with tasks that link to it. All in one free, local app.
Eidos for…
Find the page written for you.
Each starts from your problem and shows the framework and plugins that fit your work.
- AI buildersStop your agent from undoing what you already decided.For solo developers and founders shipping with Claude Code, Codex, or Cursor.
- Product teamsThe PRD that is still true after it ships.For the product manager and lead engineer whose team builds with Claude Code, Codex, or Cursor.
- Teams on JiraKeep planning in Jira. Keep the spec beside it.For teams whose board lives in Jira and whose specs keep falling behind.
- Agencies and studiosEvery client project, built the same way. Every sign-off, a version.For agency owners, delivery leads, and tech leads running several clients at once.
- Game developersThe game design doc that keeps up with the game.For indie and small-studio teams who want a GDD people actually read.
- Writers and worldbuildersYour story bible, checked, and never written for you.For novelists, worldbuilders, and tabletop writers with more world than one notebook can hold.
- FoundersYour thesis, your plans, and why you said no, in one place.For founders tired of rebuilding the deck and forgetting why they killed an idea.
- CreatorsEvery video on one page, from the hook to the sponsor read.For YouTubers, podcasters, and streamers who plan in series and work with an editor or a sponsor.
- Educators and course creatorsEvery course tied to what the learner will be able to do.For course creators, bootcamp teams, and teachers who build more than one course.
- Research labsThe question and the method, written before the results.For computational and mixed labs whose method lives in one person’s head.
- Obsidian usersKeep Obsidian. Give your vault a shape it keeps.For Obsidian users who want structure, a check, a backlog, and an agent on their vault.
- Big personal projectsEvery quote, decision, and vendor, in one place.For a renovation, a wedding, or any project too big for one spreadsheet.
Write down what you’re making.
Download Eidos MD, open a folder, and start from the framework closest to your work. You can reshape it all later.
Free for macOS, Windows, and Linux. Your files stay plain text in a folder you own.