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No.162 · AI & Chat

Inline Diff

An AI code edit proposed inside the file: new lines type in under the ones they replace, and accepting folds the old lines away so what's left simply looks like code.

The prompt

The design brief behind this component — reuse it to regenerate, remix, or explain it.

Build an AI-editor inline diff in a dark IDE style (#141414 panel, 12px radius, a single file tab, Geist Mono 13px/1.7). Above the code, the instruction sits in a soft accent-tinted strip with a ✦ and a '+4 −1' stat. The proposal is interleaved into the file: the replaced line gets a red tint, a − sign and a faint strike-through; the new lines appear beneath it one at a time (every 420ms), each folding open (grid-template-rows 0fr → 1fr) and 'typing' in via a stepped clip-path reveal, on a green tint with + signs. A footer shows 'Writing edit…' with a spinner, then Reject (⌘⌫) and Accept (⌘↵) buttons with key hints. Accept folds the deleted rows closed (480ms) and fades the green tint and + signs away so the additions become ordinary code; line numbers renumber. Reject folds the additions closed and un-strikes the original. A tiny regex highlighter colours keywords, strings, numbers and operators. 'Propose again' replays. The panel is focusable and handles the shortcuts.

Notes

Interaction
Watch the edit being written, then Accept/Reject with the buttons or ⌘↵ / ⌘⌫ while the editor is focused.
Motion
Rows fold 480ms expo-out; additions type in with an 18-step clip reveal every 420ms; tints fade 400–700ms after a decision.
Accessibility
The editor is a focusable region with a label and keyboard shortcuts; decisions are real buttons; status changes are announced. Reduced motion shows the full proposal immediately and switches states instantly.
Responsive
Fluid up to 40rem; long lines scroll horizontally inside the code area.
On touch
The buttons cover everything the shortcuts do.

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