You bring the ideas
Catch a thought in two seconds. Import your old posts, notes and voice memos so Sourdough Space knows what you have already said.
YYou
Mac · v0.1 For creators who post every week
Know what you've said.
Know what you've said.
Know when to say it again.
Sourdough Space is a private memory for your content. It keeps every idea, every time you posted it, and how it did. Claude drafts. You decide.
Sourdough Space for Mac, version 0.1. Not public yet.
Plans and tracks your work on
LinkedIn
X
Instagram
YouTube
Shorts and TikTok
Newsletter
You have posted hundreds of times. A few ideas worked. Most were forgotten. So you repeat yourself by accident, contradict yourself in public, and let your best ideas die after one post.
Sourdough Space remembers all of it, so you can spend your time making things.
How it works
Three jobs. One is yours.
Sourdough Space never writes or posts on its own. It keeps the memory and the rules, and everyone stays in their lane.
Claude does the drafting
Claude Code reads Sourdough Space and writes a version for each platform. Every claim has to cite something you wrote, or it is refused.
Claude
You make every call
Accept, edit or reject. Schedule it. Post it yourself. Sourdough Space logs it and learns what worked, so next week is smarter.
YYou
Idea
One claim in your own words. Not a post. An idea can become many posts.
Reuse ledger
The history of an idea: every platform, every date, and how each post did.
Corpus
Everything you have already written or said. It is what drafts are checked against.
Stance
Something you believe, written down and dated, so a new post can't quietly contradict it.
Guided tour · 10 steps
From a stray thought to a post that worked.
Scroll, or use ← →
Two gates
Claude can't make things up. Or contradict you quietly.
Every draft passes two checks before it reaches you. Try to sneak a line past them.
Add a line to the draft
LinkedIn postDraft from Claude
Hook
I stopped posting opinions I can't prove.
Story
In March I wrote one rule into my stance document: no receipt, no claim.1
Sample idea from Sourdough Space's demo library. Gate wording simplified.
Everything inside
One calm place for all of it.
Every screen has one job. Nothing is hidden, and nothing gets in the way.
Every idea remembers where it has been.
Each idea keeps a timeline: every platform, every date, how it did. Sourdough Space tells you when it is safe to say again.
LinkedIn
2.6×
cooling down
ready
Newsletter
1.4×
cooling down
ready
X
1.1×
cooling down
ready
Instagram
never used · open now
JunAugOctDec
No receipt, no claim.
Every fact or story in a draft must cite something you wrote. Uncited drafts never reach your Inbox.
Since then every post starts from something I shipped.1
Cited: your March note
This tripled my followers.
Refused: no source
It catches you contradicting yourself.
When something you post disagrees with a stance you hold, Sourdough Space flags it and blocks the related ideas until you settle it.
Stance · MarchRest days are non-negotiable.
vs
Post · AugustLaunch week, and I trained every single day.
Rest days are a training inputSleep is the real stack
Ideas, not just posts.
One idea can become a LinkedIn post, a thread, a carousel and a newsletter. Track it from a rough seed to an evergreen winner.
Seed→
Shaped→
Ready→
Live→
Evergreen
One idea, every platform.
Claude drafts a version for each. You edit. Your edits are saved, so the next draft sounds more like you.
LinkedInX threadIG carouselNewsletter
Drafts that sound like you.
Set your banned words, your favourite words and your length limits. Every draft is checked against them.
Em dashesNone
Banned wordsNone
Length325 / 3,000
A steady week, without the guesswork.
Set a target per platform. Open slots suggest ideas that are ready to go again.
LinkedIn1/3
Instagram1/2
X threads0/3
Newsletter0/1
Compare every post to your own average.
Log how a post did. Sourdough Space measures it against your usual on that platform, and highlights the ones that beat it by 2× or more.
Best outlier2.6×
Median edit ratio0.62
Posts at 2× or more2
Learn from people you admire.
Track accounts on purpose. Each one needs a reason, so it stays a study list and never turns into a feed.
@framebyframe_liShort-form editing
4.0×@runlogjonasHonest training vlogs
2.8×Claude can read. Claude can suggest. Claude can't decide.
Claude Code connects to Sourdough Space on your Mac. It can look things up and leave proposals. Accepting, scheduling, publishing and deleting stay with you.
Read ideas, corpus, results23 tools
Suggest to your Inbox8 tools
Accept, schedule, publish, deleteYou only
Write a carousel and see it as you go.
Eight slides, one type each, with safe zones and a live preview. Text first. Export from your own design tool.
Everything in one keystroke.
⌘K
Capture a thought⌘N
Brief Claude⌘⇧B
Open Inbox⌘2
Have I said this??
Start with what you already have.
Import a notes folder, past posts and your own frameworks. Run it again any time. Nothing is duplicated.
notes folderposts.csvbrand kitlead magnetsframeworks
Your library stays on your Mac.
0
network calls from the app itself. No account. No server.When you ask Claude to work, it reads what you allow, under your own Claude plan.
Part of your Mac
Menu bar, Spotlight, Siri and Shortcuts.
Menu bar captureSpotlight searchSiri and ShortcutsNotificationsWidgets (signed builds)Keyboard-first
iPhone · in progress
Catch ideas where they happen.
Ideas arrive in the shower, on a walk, in the middle of a call. The iPhone app is for getting them in and getting today's post out.
- Voice captureSay it. It is transcribed on your phone.
- Swipe to reviewRight to accept, left to reject.
- Share from any appSend text, links, images and files.
- Widgets and a Lock Screen countdownSee your next post to hand off, at a glance.
The iPhone app is built and running in the simulator. It is not on the App Store yet.
How it compares
Schedulers manage posts.
Schedulers manage posts.
Sourdough Space manages ideas.
Most tools start when a post exists. Sourdough Space starts earlier, with the idea, and keeps going after it is published.
| Sourdough Space | Notes appsNotion, Obsidian | SchedulersBuffer, Hootsuite | Creator AI suitesTaplio, Hypefury | AI chatChatGPT, Claude | |
|---|---|---|---|---|---|
| Keeps every idea as its own cardSeparate from the posts it becomes | |||||
| Remembers each time an idea went outWhich platform, which date, how it did | |||||
| Tells you when it is safe to say againCooldown rules you can change | |||||
| Blocks claims you can't sourceEvery fact must cite your own words | |||||
| Warns when you contradict yourselfChecked against stances you wrote down | |||||
| Drafts in your voiceThrough Claude, with your voice kit | |||||
| Compares posts to your own averageNot to strangers' numbers | |||||
| Plans a weekly rhythm per platform | |||||
| Runs on your Mac, no accountThe app itself works offline | |||||
| Posts for you on a scheduleSourdough Space leaves this to you, on purpose |
Yes
Partly, or by hand
No
Columns describe each category in general. Individual products vary and change often. Compared in September 2026.
Straight answers
What it does.
What it does.
What it doesn't.
Sourdough Space is focused on purpose. Here is exactly where the line is.
Sourdough Space does
- Remember every idea and every time you used it
- Tell you when an idea is safe to say again
- Stop drafts that make claims you can't source
- Flag when a post contradicts what you believe
- Plan your week around each platform's rhythm
- Hand you a checklist to post, then log it when you are done
- Measure every post against your own average
- Keep your library in one file on your own Mac
Sourdough Space doesn't
- Post for youYou post by hand. Sourdough Space gets you ready and logs it.
- Write without Claude CodeDrafts come from Claude Code on your own Claude plan. No Claude, no drafts.
- Pull your statsYou type in the numbers. Automatic import is planned.
- Make images or videoCarousels are text plus a preview. Design in your own tool.
- Work for teamsOne creator, one library. No seats, no sharing.
- Run everywhereMac and iPhone only, in English. No Windows, Android, web or iPad.
- Claim to be finishedVersion 0.1. The Mac build is unsigned and the iPhone app is still in progress.
Questions
Good questions.
Is Sourdough Space an AI writer?
No. Sourdough Space is the memory and the rulebook. Claude does the drafting, through Claude Code. Sourdough Space makes sure every draft cites something you wrote and doesn't contradict what you believe.
Do I need Claude Code?
For drafting, studying and finding patterns, yes. You run it on your own Claude plan and connect it to Sourdough Space in a few minutes. Without it you can still capture ideas, plan your week, post from the checklist and log results, but nothing drafts itself.
Does it post for me?
Never. At the scheduled time Sourdough Space gives you a checklist and opens the platform's own composer. You post, paste the live link back, and the ledger logs it.
Where does my data live?
In one file on your Mac. There is no account and no server, and the app makes no network calls of its own. When you ask Claude to work, it reads what you have allowed through a local connector, and that goes to Anthropic under your own Claude plan.
What does "safe to say again" mean?
Each idea has a cooldown. By default an idea waits 120 days before it returns to the same platform in the same format, 30 days for a new format, and 2 days for a different platform. Ideas that clash with one of your stances stay blocked. Every number is yours to change.
Which platforms does it cover?
It plans and tracks LinkedIn, X, Instagram, YouTube, Shorts, TikTok and newsletters. The hand-off checklist opens the composer for all of them except the newsletter, which you send from your own email tool.
Is it for teams?
Not today. Sourdough Space is built for one creator with one voice. There are no seats and no shared libraries.
When can I get it, and what will it cost?
Sourdough Space for Mac is at version 0.1 and is not public yet. Pricing hasn't been announced. Say hello and you will hear first when there is a build to try.
Early access
Open Sourdough Space.
Know what you have said. Know when to say it again. Get a first look before anyone else.