Summary
Qwen Code's @extension mention autocomplete PR adds a Codex-style dropdown for installed extensions. The change makes extension invocation more discoverable from the prompt box and signals a broader shift toward command palettes and mention-based tool UX in agent CLIs.
What changed
Qwen Code opened an @extension autocomplete PR for installed extensions.
Why it matters
Agent tools become harder to use as extension counts grow. Mention autocomplete helps users discover and invoke extensions without memorizing names, reducing friction for plugin-heavy workflows.
Evidence excerpt
Agents Radar lists PR #5849 as @extension mention autocomplete with a Codex-style dropdown for installed extensions.