Yahoo! OpenIDs are the same for all RPs. I had assumed that Yahoo! would be using directed identity to provide a different OpenID for each user/site combination, to prevent correlation of accounts. I was incorrect; they’re just using it for easier sign-in, with the same auto-generated URL used for every site.
Recent articles
- Reverse engineering Codex CLI to get GPT-5-Codex-Mini to draw me a pelican - 9th November 2025
- Video + notes on upgrading a Datasette plugin for the latest 1.0 alpha, with help from uv and OpenAI Codex CLI - 6th November 2025
- Code research projects with async coding agents like Claude Code and Codex - 6th November 2025