Under the hood
A new internal check rejects timestamp-prefixed tokens older than 10 minutes
What
Claude Code now has a helper that reads a leading number from the start of a string (assumed to be a unix timestamp in seconds) and only accepts the string as still valid if that timestamp is within 10 minutes of the current time; otherwise it treats the value as expired.
Why
The finding doesn't say what kind of string or token this check applies to, so it's not clear what user-facing feature depends on it.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What token or value this expiry check is applied to, and what happens when it is rejected, is not stated.