Unclear What the skipped release step does, and so what you would notice, is not clear.
Every message you send carries its own ID. Sometimes the same message arrives twice. If it arrives again while Claude Code is still waiting to process the first copy, for example because that copy is still in the message queue, Claude Code now marks the repeat as a withheld echo and skips the step that would normally release it. Before, every repeat was logged as skipped and released the same way.
A new diagnostic record also notes how long ago an earlier copy of the message had started. It sorts that time into one of these ranges:
- under 1 minute
- under 10 minutes
- under 1 hour
- under 6 hours
- 6 hours or more
The record also notes the state of the message queue and whether the conversation had been compacted, which means shortened by summarising earlier parts.
This changes how messages that are delivered more than once are handled in remote sessions and in SDK sessions, which are programs built on top of Claude Code. The new record helps trace duplicate or late-arriving messages.
What the skipped release step does, and so what you would notice, is not clear.