Simon Willison built a blog newsletter index almost entirely by voice

Key points

• He used the ChatGPT desktop app's Codex voice mode while cooking, against a local dev server with a visual preview.
• The feature adds a Newsletters index mixing free weekly Substack posts with sponsors-only monthly updates.
• Newsletters appear on date archive pages but not tag pages or the homepage; monthly ones become searchable after going public.
• Typed prompts were still needed for PR review and fixing the private repository import, adding about half an hour.

Why it matters for marketers: Content teams may find voice-plus-preview useful for drafting and quick iterations, but detailed fixes and code review still favored typing, per the author.