Why the first sentence should lock

A decision is cheap to revise after the fact. The calendar fills, the excuse arrives, and the original sentence — the one you wrote when you still meant it — is quietly replaced by a softer version. That rewrite is not a note. It is a disappearing act.

Nixon is a personal productivity app: an immutable commitment and decision log. You open a private notebook, write what you said you would do, and lock the first sentence. Later you may add dated notes. You may not edit the original. You may not delete it. The ink is dry on purpose.

This is not a journal that forgives everything. It is a small ledger. Capture, lock, annotate. That is the whole product. The name is a short product word, as in nix on going back. It is not a brand story and not a manifesto. It is a constraint you choose.

How to open a notebook

Identify the notebook with an email and a passphrase. The same pair always opens the same log. There is no magic link and no password reset. If you forget the pair, that notebook cannot be reopened. We store a hash of the email and passphrase, never the passphrase itself. The form that creates a log is the same form that reopens one. A stranger can write an entry today.

There is no account signup in the usual sense — no confirmation email, no public profile, no feed. The notebook is yours because you can reopen it. That is enough.

Lock the first sentence

When you write an entry, you are recording a call you made or a promise you gave, in your words. Date and context belong in that line if you need them. Once you save, the original text cannot be changed. The software will not offer an edit button. It will not offer a delete button. That is the product, not a missing feature.

The first sentence is the record. After it is locked, the only honest move is to leave it standing. People do not usually lie in the first draft of a commitment. They lie in the second, when the first draft has become inconvenient. Nixon removes the second draft.

This is useful when you are negotiating with yourself. It is useful when a week has passed and you want to remember what you actually said, not what would be comfortable to have said. It is not a court. It is a private page that refuses to be edited.

Notes only

If the world changed, append a dated note. If you missed the deadline, say so in a note. If you finished the work, say so in a note. The original line stays as you wrote it. Annotation is allowed. Airbrushing is not.

This is the difference between a notes file and a log. A notes file can be silently rewritten. A paper page can be overwritten with a darker pen. Nixon keeps the first sentence and lets the later sentences sit beside it, dated, in order.

You will not find ratings here, or a count of other people's notebooks, or testimonials. Those would be a different product. This one is a lock and a margin.

Open a log

If you want a place where the first sentence stays, open a notebook. Write the call. Lock it. Add a note later if you must.

Open a log