Put your read on the page you do not own.

The documents your founders read belong to someone else, and your read on them lives in Slack. Attach it to the phrase itself — without touching the original — and it opens for whoever reads that phrase next.

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Try a layer of explanationFictional sample · source excerpt

docs.example.org

Standard Docs Library

Standard early-stage financing documents

…s are normally negotiated: the amount invested and the post-money valuation cap. Everything else in the instrument is left at its standard value…

…mes attach a side letter. The most common requests are most favored nation treatment, pro rata rights, and information rights.

Original unchanged

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docs.example.org

Standard Docs Library

Standard early-stage financing documents

…s are normally negotiated: the amount invested and the . Everything else in the instrument is left at its standard value…

…mes attach a side letter. The most common requests are treatment, pro rata rights, and information rights.

Select an underlined phrase to open its explanation.

None of those pages is yours to fix

The same clause sits in the standard documents, on your own terms page, and in whatever thread your founders read next. You can edit one of them. Everywhere else the clause stands there unexplained, and the next founder asks you again.

What only we do 01

They underline it. It reaches you.

Asking “what does pro rata mean?” in front of the people writing the check is expensive, so they don’t ask. Underlining costs nothing — and the phrase itself reaches you.

Try it yourself

Drag across any phrase below that you would not want to ask about out loud. Nothing to install.

Standard SAFE — the document, untouched

In a priced round, existing investors may exercise their pro rata rights to maintain ownership percentage. The valuation cap applies only to the conversion of this instrument, and the MFN provision entitles the holder to the most favorable terms granted to any subsequent investor.

What you see

Which clause loses people. Not who — readers aren’t identified.

As it adds up

Answer it once. The next cohort underlines something else.

What only we do 02

Mark it once. It shows up everywhere that phrase does.

The note attaches to the phrase, not to the page. Different address, different sentences around it — the note still follows. Nothing to redo site by site.

The phrase sits somewhere different on every page. The note finds it anyway.

Switch sites yourself. Different address, different wording — same phrase, same note.

All three are different sites. We can edit none of them.

docs.example.org/instruments/safe/overviewOriginal, untouched

Standard early-stage financing documents

Standard Docs Library · Updated Jul 2026 · reference

3 notes on this page

These templates are published as-is for early-stage financings. They are used widely enough that most rounds close without redlining them.

Only two fields are normally negotiated: the amount invested and the . Everything else in the instrument is left at its standard value.

Added noteNot part of the original pageThe same note is attached in 3 places

What the cap actually sets

The number that decides what you sold: Ownership is the amount invested divided by the cap. $200k at a $4M cap is 5% of the company, decided the day you sign — not the day it converts.
Why ours is fixed for the batch: A cap one team negotiates up becomes the number the next team is measured against. One cap for the cohort means nobody spends the program negotiating instead of building.

How a cap becomes ownershipfrom Y Combinator Startup School · SAFEs and priced rounds

11:05 – 13:05120s of 45:03

The slice cut from the full videostops at the end

The author picks the video. Below is a real walkthrough, cut to the part that answers it.

Updated 2026-08-11

Investors sometimes attach a side letter. The most common requests are treatment, rights, and information rights.

The instrument is not debt. There is no interest and no maturity date, and it converts only when a priced round closes.

What only we do 03

A 45-minute lecture, cut down to the two minutes that answer it

How a cap turns into ownership, how an instrument converts, how a form gets filled — explanations that run long in writing and short on a screen. If a recording already exists, point at the moment instead of filming again. Set a start and an end, and only that slice plays, then stops. A link cannot do that.

Text puts language in the way; a screen does not.

Added noteNot part of the original page

What the cap actually sets

How a cap becomes ownershipfrom Y Combinator Startup School · SAFEs and priced rounds

11:05 – 13:05120s of 45:03

The slice cut from the full videostops at the end

The author picks the video. Below is a real walkthrough, cut to the part that answers it.

Send us a page. We'll put your read on it.

Send one link to a page you would want explained. We will lay it over that page ourselves and send the screen back to you. Nothing to install.

Send a page linkhabitus33.tedin@gmail.com

Read first. Install when you want it on the real page.

This screen is the no-install view. Install the extension and the same notes open on the original site itself.

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A made-up example built to demonstrate the feature. The program, the documents and the addresses are all fictional. The linked video is a real public lecture, credited to its source.