What each action does

There are four places AI appears: the note editor, the add/edit dialog for an item, Spotlight, and the search index. All of them need a key first.

In the editor

Notes and task bodies use a rich-text editor with an AI button in its toolbar. There are two other ways in: the small bubble menu that appears over selected text carries the same list minus Custom Prompt… and Continue Writing, and the editor’s slash menu has Continue with AI.

Scope is decided by your selection. With text selected, the action runs on that text and replaces exactly it. With nothing selected, it runs on the whole note and replaces the whole note. The menu tells you which — Applying to selected text appears at the top when there is a selection.

Action	Does
Custom Prompt…	Opens a box for your own instruction, applied to the same scope
Continue Writing	Writes on from the cursor, matching tone and language, and inserts at the cursor rather than replacing
Improve Writing	Clearer, more concise, same meaning and tone
Fix Grammar & Spelling	Grammar, spelling and punctuation only; meaning and style untouched
Make Shorter	Condenses, keeping the key information
Make Longer	Expands with more detail, same tone
Simplify	Simpler words, shorter sentences
Make Professional	Rewrites formally, for business
Make Casual	Rewrites friendlier
Summarize	Key points, as a bullet list
Translate to English	Translates; leaves English as it is

Fix Grammar & Spelling is the one that works on the Free plan. Everything else, including Custom Prompt, carries a padlock until you have Pro.

Only one action runs at a time. The AI button spins while it works and a second action asked for meanwhile is ignored, so a slow request cannot get interleaved with a fast one. The result lands where the action started, even if you moved the cursor while waiting.

Replacement is the whole point, and there is no undo button

These actions overwrite. Select first if you only meant to touch a paragraph; with nothing selected, Summarize replaces your note with its own summary. The editor’s normal Ctrl/⌘ + Z still works, so undo immediately if it was not what you wanted.

In the item dialog

Three buttons on the add/edit form for a bookmark:

• AI Generate — writes the Description for you from the URL and title. One or two sentences, aimed at under 150 characters. Needs a URL and a title first, and says so if either is missing.
• Suggest Column — reads the URL and title and proposes where the bookmark belongs, shown as Suggested: column with a Move to column button. It needs more than one column to have an opinion. If you have built the search index, it first looks at where similar bookmarks already live and only asks the model when those do not agree clearly enough — which makes it free and instant much of the time.
• Find Similar Websites — proposes other sites like this one, each with an Add this website button that turns it into a new bookmark.

In search

AI search in Spotlight matches by meaning rather than by characters. It has its own page: AI search.

The index

AI Search Index, at the bottom of the AI panel, is what makes search by meaning possible. Build index turns every item into a vector once; the progress reads n / total indexed.

The text used for a vector is the item’s title, URL, contents and tag names. It lives in your browser and is not sent to TabOasis.

Vectors from Gemini and from OpenAI are not interchangeable. Change provider and the button becomes Rebuild for provider, with the note You switched providers. Re-index to enable AI search on provider.

What actually gets sent to your provider

Worth being exact, since it is your account making the request:

Action	Sends
Editor actions	the selected text, or the whole note body, as HTML
Continue Writing	the text before your cursor, up to about 6,000 characters
AI Generate	the bookmark’s URL and title
Suggest Column	the URL, the title, and your column names
Find Similar Websites	the URL and title
Building the index	each item’s title, URL, contents and tag names
AI search	your query, and — when reranking is on — the shortlisted items

That traffic goes from your browser to OpenAI or Google directly. It does not pass through TabOasis, which is the subject of the next page.