Codex App regression: typing @superpowers no longer inserts plugin mention link

What version of the Codex App are you using?

Codex App 26.513.20950, build 2816

What operating system are you using?

macOS 26.5 (25F71)

What happened?

After the latest Codex update, typing @superpowers in the Codex App chat composer no longer resolves to / inserts the plugin mention link for the Superpowers plugin.

The plugin itself is installed and enabled. Copying and pasting the fully formed mention still works:

[@superpowers](plugin://superpowers@openai-curated)

So this appears to be a composer autocomplete / mention insertion regression rather than a plugin installation or skill-loading problem.

Steps to reproduce

1. Open the Codex App with the Superpowers plugin installed/enabled.
2. In the chat composer, type @superpowers.
3. Observe that the composer does not insert or resolve the mention link.
4. Paste [@superpowers](plugin://superpowers@openai-curated) manually.
5. Observe that the pasted plugin mention references the plugin correctly.

Expected behavior

Typing @superpowers should offer or insert the Superpowers plugin mention, as it did before the latest Codex update.

Actual behavior

Typing @superpowers no longer inserts the plugin mention link. The only working path is to paste the full Markdown/plugin URI mention manually.

Impact

Plugin mentions for Superpowers have to be copied and pasted manually, which breaks the normal chat composer mention workflow and makes it look as though the plugin/skill is not available even though it is installed and loaded.

Local evidence checked

• ~/.codex/config.toml contains superpowers@openai-curated with enabled = true.
• Local plugin cache contains Superpowers 5.1.0 under ~/.codex/plugins/cache/openai-curated/superpowers/....
• The current Codex session exposes the Superpowers skills, for example superpowers:using-superpowers, superpowers:systematic-debugging, and superpowers:test-driven-development.
• Recent local logs did not show a Superpowers load/sync failure.

Suggested labels: app, bug, regression, plugins.