You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Slash CommandsArea: what it touches
ImprovementsKind: in v2.1.265,
ImprovementsSection of the release
What
When a local slash command's output isn't ready yet but you've already queued a message containing it, Claude Code can now go back and patch the queued message once the result arrives, rather than requiring the result up front. This works by finding a queued message that starts with <local-command-stdout> or <local-command-stderr> and rewriting its contents in place, paired with new internal helpers that build the initial placeholder message and track it by a deferredSlashUuid.
Why
This lets a local slash command's result show up correctly even if it finishes after the message using it has already been queued for sending, instead of the message being stuck with stale or missing output.
